[PATCH rtems-lwip v2 3/7] Add STM32 Ethernet source
Duc Doan
dtbpkmte at gmail.com
Tue Sep 6 16:20:32 UTC 2022
This patch adds ST's Ethernet and lwIP port and DP83848 driver. The
files are generated using STM32CubeIDE with STM32F4 Cube FW v1.27.1,
under no RTOS mode.
---
stm32/driver/dp83848.c | 664 +++++++++++++++++++++++++++++++++++++
stm32/driver/dp83848.h | 436 ++++++++++++++++++++++++
stm32/ethernetif.c | 737 +++++++++++++++++++++++++++++++++++++++++
stm32/ethernetif.h | 45 +++
stm32/lwip.c | 260 +++++++++++++++
stm32/lwip.h | 76 +++++
6 files changed, 2218 insertions(+)
create mode 100644 stm32/driver/dp83848.c
create mode 100644 stm32/driver/dp83848.h
create mode 100644 stm32/ethernetif.c
create mode 100644 stm32/ethernetif.h
create mode 100644 stm32/lwip.c
create mode 100644 stm32/lwip.h
diff --git a/stm32/driver/dp83848.c b/stm32/driver/dp83848.c
new file mode 100644
index 0000000..2c5d59b
--- /dev/null
+++ b/stm32/driver/dp83848.c
@@ -0,0 +1,664 @@
+/**
+ ******************************************************************************
+ * @file dp83848.c
+ * @author MCD Application Team
+ * @brief This file provides a set of functions needed to manage the DP83848
+ * PHY devices.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright (c) 2021 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "dp83848.h"
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup Component
+ * @{
+ */
+
+/** @defgroup DP83848 DP83848
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/** @defgroup DP83848_Private_Defines DP83848 Private Defines
+ * @{
+ */
+#define DP83848_SW_RESET_TO ((uint32_t)500U)
+#define DP83848_INIT_TO ((uint32_t)2000U)
+#define DP83848_MAX_DEV_ADDR ((uint32_t)31U)
+/**
+ * @}
+ */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+/** @defgroup DP83848_Private_Functions DP83848 Private Functions
+ * @{
+ */
+
+/**
+ * @brief Register IO functions to component object
+ * @param pObj: device object of DP83848_Object_t.
+ * @param ioctx: holds device IO functions.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_ERROR if missing mandatory function
+ */
+int32_t DP83848_RegisterBusIO(dp83848_Object_t *pObj, dp83848_IOCtx_t *ioctx)
+{
+ if(!pObj || !ioctx->ReadReg || !ioctx->WriteReg || !ioctx->GetTick)
+ {
+ return DP83848_STATUS_ERROR;
+ }
+
+ pObj->IO.Init = ioctx->Init;
+ pObj->IO.DeInit = ioctx->DeInit;
+ pObj->IO.ReadReg = ioctx->ReadReg;
+ pObj->IO.WriteReg = ioctx->WriteReg;
+ pObj->IO.GetTick = ioctx->GetTick;
+
+ return DP83848_STATUS_OK;
+}
+
+/**
+ * @brief Initialize the DP83848 and configure the needed hardware resources
+ * @param pObj: device object DP83848_Object_t.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_ADDRESS_ERROR if cannot find device address
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ * DP83848_STATUS_RESET_TIMEOUT if cannot perform a software reset
+ */
+ int32_t DP83848_Init(dp83848_Object_t *pObj)
+ {
+ uint32_t tickstart = 0, regvalue = 0, addr = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->Is_Initialized == 0)
+ {
+ if(pObj->IO.Init != 0)
+ {
+ /* GPIO and Clocks initialization */
+ pObj->IO.Init();
+ }
+
+ /* for later check */
+ pObj->DevAddr = DP83848_MAX_DEV_ADDR + 1;
+
+ /* Get the device address from special mode register */
+ for(addr = 0; addr <= DP83848_MAX_DEV_ADDR; addr ++)
+ {
+ if(pObj->IO.ReadReg(addr, DP83848_SMR, ®value) < 0)
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ /* Can't read from this device address
+ continue with next address */
+ continue;
+ }
+
+ if((regvalue & DP83848_SMR_PHY_ADDR) == addr)
+ {
+ pObj->DevAddr = addr;
+ status = DP83848_STATUS_OK;
+ break;
+ }
+ }
+
+ if(pObj->DevAddr > DP83848_MAX_DEV_ADDR)
+ {
+ status = DP83848_STATUS_ADDRESS_ERROR;
+ }
+
+ /* if device address is matched */
+ if(status == DP83848_STATUS_OK)
+ {
+ /* set a software reset */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, DP83848_BCR_SOFT_RESET) >= 0)
+ {
+ /* get software reset status */
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, ®value) >= 0)
+ {
+ tickstart = pObj->IO.GetTick();
+
+ /* wait until software reset is done or timeout occured */
+ while(regvalue & DP83848_BCR_SOFT_RESET)
+ {
+ if((pObj->IO.GetTick() - tickstart) <= DP83848_SW_RESET_TO)
+ {
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, ®value) < 0)
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ break;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_RESET_TIMEOUT;
+ break;
+ }
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ }
+
+ if(status == DP83848_STATUS_OK)
+ {
+ tickstart = pObj->IO.GetTick();
+
+ /* Wait for 2s to perform initialization */
+ while((pObj->IO.GetTick() - tickstart) <= DP83848_INIT_TO)
+ {
+ }
+ pObj->Is_Initialized = 1;
+ }
+
+ return status;
+ }
+
+/**
+ * @brief De-Initialize the dp83848 and it's hardware resources
+ * @param pObj: device object DP83848_Object_t.
+ * @retval None
+ */
+int32_t DP83848_DeInit(dp83848_Object_t *pObj)
+{
+ if(pObj->Is_Initialized)
+ {
+ if(pObj->IO.DeInit != 0)
+ {
+ if(pObj->IO.DeInit() < 0)
+ {
+ return DP83848_STATUS_ERROR;
+ }
+ }
+
+ pObj->Is_Initialized = 0;
+ }
+
+ return DP83848_STATUS_OK;
+}
+
+/**
+ * @brief Disable the DP83848 power down mode.
+ * @param pObj: device object DP83848_Object_t.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_DisablePowerDownMode(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
+ {
+ readval &= ~DP83848_BCR_POWER_DOWN;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Enable the DP83848 power down mode.
+ * @param pObj: device object DP83848_Object_t.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_EnablePowerDownMode(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
+ {
+ readval |= DP83848_BCR_POWER_DOWN;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Start the auto negotiation process.
+ * @param pObj: device object DP83848_Object_t.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_StartAutoNego(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
+ {
+ readval |= DP83848_BCR_AUTONEGO_EN;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Get the link state of DP83848 device.
+ * @param pObj: Pointer to device object.
+ * @param pLinkState: Pointer to link state
+ * @retval DP83848_STATUS_LINK_DOWN if link is down
+ * DP83848_STATUS_AUTONEGO_NOTDONE if Auto nego not completed
+ * DP83848_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
+ * DP83848_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
+ * DP83848_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
+ * DP83848_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_GetLinkState(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+
+ /* Read Status register */
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BSR, &readval) < 0)
+ {
+ return DP83848_STATUS_READ_ERROR;
+ }
+
+ /* Read Status register again */
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BSR, &readval) < 0)
+ {
+ return DP83848_STATUS_READ_ERROR;
+ }
+
+ if((readval & DP83848_BSR_LINK_STATUS) == 0)
+ {
+ /* Return Link Down status */
+ return DP83848_STATUS_LINK_DOWN;
+ }
+
+ /* Check Auto negotiaition */
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) < 0)
+ {
+ return DP83848_STATUS_READ_ERROR;
+ }
+
+ if((readval & DP83848_BCR_AUTONEGO_EN) != DP83848_BCR_AUTONEGO_EN)
+ {
+ if(((readval & DP83848_BCR_SPEED_SELECT) == DP83848_BCR_SPEED_SELECT) && ((readval & DP83848_BCR_DUPLEX_MODE) == DP83848_BCR_DUPLEX_MODE))
+ {
+ return DP83848_STATUS_100MBITS_FULLDUPLEX;
+ }
+ else if ((readval & DP83848_BCR_SPEED_SELECT) == DP83848_BCR_SPEED_SELECT)
+ {
+ return DP83848_STATUS_100MBITS_HALFDUPLEX;
+ }
+ else if ((readval & DP83848_BCR_DUPLEX_MODE) == DP83848_BCR_DUPLEX_MODE)
+ {
+ return DP83848_STATUS_10MBITS_FULLDUPLEX;
+ }
+ else
+ {
+ return DP83848_STATUS_10MBITS_HALFDUPLEX;
+ }
+ }
+ else /* Auto Nego enabled */
+ {
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_PHYSCSR, &readval) < 0)
+ {
+ return DP83848_STATUS_READ_ERROR;
+ }
+
+ /* Check if auto nego not done */
+ if((readval & DP83848_PHYSCSR_AUTONEGO_DONE) == 0)
+ {
+ return DP83848_STATUS_AUTONEGO_NOTDONE;
+ }
+
+ if((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_100BTX_FD)
+ {
+ return DP83848_STATUS_100MBITS_FULLDUPLEX;
+ }
+ else if ((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_100BTX_HD)
+ {
+ return DP83848_STATUS_100MBITS_HALFDUPLEX;
+ }
+ else if ((readval & DP83848_PHYSCSR_HCDSPEEDMASK) == DP83848_PHYSCSR_10BT_FD)
+ {
+ return DP83848_STATUS_10MBITS_FULLDUPLEX;
+ }
+ else
+ {
+ return DP83848_STATUS_10MBITS_HALFDUPLEX;
+ }
+ }
+}
+
+/**
+ * @brief Set the link state of DP83848 device.
+ * @param pObj: Pointer to device object.
+ * @param pLinkState: link state can be one of the following
+ * DP83848_STATUS_100MBITS_FULLDUPLEX if 100Mb/s FD
+ * DP83848_STATUS_100MBITS_HALFDUPLEX if 100Mb/s HD
+ * DP83848_STATUS_10MBITS_FULLDUPLEX if 10Mb/s FD
+ * DP83848_STATUS_10MBITS_HALFDUPLEX if 10Mb/s HD
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_ERROR if parameter error
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_SetLinkState(dp83848_Object_t *pObj, uint32_t LinkState)
+{
+ uint32_t bcrvalue = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &bcrvalue) >= 0)
+ {
+ /* Disable link config (Auto nego, speed and duplex) */
+ bcrvalue &= ~(DP83848_BCR_AUTONEGO_EN | DP83848_BCR_SPEED_SELECT | DP83848_BCR_DUPLEX_MODE);
+
+ if(LinkState == DP83848_STATUS_100MBITS_FULLDUPLEX)
+ {
+ bcrvalue |= (DP83848_BCR_SPEED_SELECT | DP83848_BCR_DUPLEX_MODE);
+ }
+ else if (LinkState == DP83848_STATUS_100MBITS_HALFDUPLEX)
+ {
+ bcrvalue |= DP83848_BCR_SPEED_SELECT;
+ }
+ else if (LinkState == DP83848_STATUS_10MBITS_FULLDUPLEX)
+ {
+ bcrvalue |= DP83848_BCR_DUPLEX_MODE;
+ }
+ else
+ {
+ /* Wrong link status parameter */
+ status = DP83848_STATUS_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ if(status == DP83848_STATUS_OK)
+ {
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, bcrvalue) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+
+ return status;
+}
+
+/**
+ * @brief Enable loopback mode.
+ * @param pObj: Pointer to device object.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_EnableLoopbackMode(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
+ {
+ readval |= DP83848_BCR_LOOPBACK;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Disable loopback mode.
+ * @param pObj: Pointer to device object.
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_DisableLoopbackMode(dp83848_Object_t *pObj)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_BCR, &readval) >= 0)
+ {
+ readval &= ~DP83848_BCR_LOOPBACK;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_BCR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Enable IT source.
+ * @param pObj: Pointer to device object.
+ * @param Interrupt: IT source to be enabled
+ * should be a value or a combination of the following:
+ * DP83848_WOL_IT
+ * DP83848_ENERGYON_IT
+ * DP83848_AUTONEGO_COMPLETE_IT
+ * DP83848_REMOTE_FAULT_IT
+ * DP83848_LINK_DOWN_IT
+ * DP83848_AUTONEGO_LP_ACK_IT
+ * DP83848_PARALLEL_DETECTION_FAULT_IT
+ * DP83848_AUTONEGO_PAGE_RECEIVED_IT
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_EnableIT(dp83848_Object_t *pObj, uint32_t Interrupt)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_IMR, &readval) >= 0)
+ {
+ readval |= Interrupt;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_IMR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Disable IT source.
+ * @param pObj: Pointer to device object.
+ * @param Interrupt: IT source to be disabled
+ * should be a value or a combination of the following:
+ * DP83848_WOL_IT
+ * DP83848_ENERGYON_IT
+ * DP83848_AUTONEGO_COMPLETE_IT
+ * DP83848_REMOTE_FAULT_IT
+ * DP83848_LINK_DOWN_IT
+ * DP83848_AUTONEGO_LP_ACK_IT
+ * DP83848_PARALLEL_DETECTION_FAULT_IT
+ * DP83848_AUTONEGO_PAGE_RECEIVED_IT
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ * DP83848_STATUS_WRITE_ERROR if connot write to register
+ */
+int32_t DP83848_DisableIT(dp83848_Object_t *pObj, uint32_t Interrupt)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_IMR, &readval) >= 0)
+ {
+ readval &= ~Interrupt;
+
+ /* Apply configuration */
+ if(pObj->IO.WriteReg(pObj->DevAddr, DP83848_IMR, readval) < 0)
+ {
+ status = DP83848_STATUS_WRITE_ERROR;
+ }
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Clear IT flag.
+ * @param pObj: Pointer to device object.
+ * @param Interrupt: IT flag to be cleared
+ * should be a value or a combination of the following:
+ * DP83848_WOL_IT
+ * DP83848_ENERGYON_IT
+ * DP83848_AUTONEGO_COMPLETE_IT
+ * DP83848_REMOTE_FAULT_IT
+ * DP83848_LINK_DOWN_IT
+ * DP83848_AUTONEGO_LP_ACK_IT
+ * DP83848_PARALLEL_DETECTION_FAULT_IT
+ * DP83848_AUTONEGO_PAGE_RECEIVED_IT
+ * @retval DP83848_STATUS_OK if OK
+ * DP83848_STATUS_READ_ERROR if connot read register
+ */
+int32_t DP83848_ClearIT(dp83848_Object_t *pObj, uint32_t Interrupt)
+{
+ uint32_t readval = 0;
+ int32_t status = DP83848_STATUS_OK;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_ISFR, &readval) < 0)
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @brief Get IT Flag status.
+ * @param pObj: Pointer to device object.
+ * @param Interrupt: IT Flag to be checked,
+ * should be a value or a combination of the following:
+ * DP83848_WOL_IT
+ * DP83848_ENERGYON_IT
+ * DP83848_AUTONEGO_COMPLETE_IT
+ * DP83848_REMOTE_FAULT_IT
+ * DP83848_LINK_DOWN_IT
+ * DP83848_AUTONEGO_LP_ACK_IT
+ * DP83848_PARALLEL_DETECTION_FAULT_IT
+ * DP83848_AUTONEGO_PAGE_RECEIVED_IT
+ * @retval 1 IT flag is SET
+ * 0 IT flag is RESET
+ * DP83848_STATUS_READ_ERROR if connot read register
+ */
+int32_t DP83848_GetITStatus(dp83848_Object_t *pObj, uint32_t Interrupt)
+{
+ uint32_t readval = 0;
+ int32_t status = 0;
+
+ if(pObj->IO.ReadReg(pObj->DevAddr, DP83848_ISFR, &readval) >= 0)
+ {
+ status = ((readval & Interrupt) == Interrupt);
+ }
+ else
+ {
+ status = DP83848_STATUS_READ_ERROR;
+ }
+
+ return status;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
diff --git a/stm32/driver/dp83848.h b/stm32/driver/dp83848.h
new file mode 100644
index 0000000..d49496d
--- /dev/null
+++ b/stm32/driver/dp83848.h
@@ -0,0 +1,436 @@
+/**
+ ******************************************************************************
+ * @file dp83848.h
+ * @author MCD Application Team
+ * @brief This file contains all the functions prototypes for the
+ * dp83848.c PHY driver.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright (c) 2021 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef DP83848_H
+#define DP83848_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include <stdint.h>
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup Component
+ * @{
+ */
+
+/** @defgroup DP83848
+ * @{
+ */
+/* Exported constants --------------------------------------------------------*/
+/** @defgroup DP83848_Exported_Constants DP83848 Exported Constants
+ * @{
+ */
+
+/** @defgroup DP83848_Registers_Mapping DP83848 Registers Mapping
+ * @{
+ */
+#define DP83848_BCR ((uint16_t)0x0000U)
+#define DP83848_BSR ((uint16_t)0x0001U)
+#define DP83848_PHYI1R ((uint16_t)0x0002U)
+#define DP83848_PHYI2R ((uint16_t)0x0003U)
+#define DP83848_ANAR ((uint16_t)0x0004U)
+#define DP83848_ANLPAR ((uint16_t)0x0005U)
+#define DP83848_ANER ((uint16_t)0x0006U)
+#define DP83848_ANNPTR ((uint16_t)0x0007U)
+#define DP83848_SMR ((uint16_t)0x0019U)
+#define DP83848_ISFR ((uint16_t)0x0012U)
+#define DP83848_IMR ((uint16_t)0x0011U)
+#define DP83848_PHYSCSR ((uint16_t)0x0010U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_BCR_Bit_Definition DP83848 BCR Bit Definition
+ * @{
+ */
+#define DP83848_BCR_SOFT_RESET ((uint16_t)0x8000U)
+#define DP83848_BCR_LOOPBACK ((uint16_t)0x4000U)
+#define DP83848_BCR_SPEED_SELECT ((uint16_t)0x2000U)
+#define DP83848_BCR_AUTONEGO_EN ((uint16_t)0x1000U)
+#define DP83848_BCR_POWER_DOWN ((uint16_t)0x0800U)
+#define DP83848_BCR_ISOLATE ((uint16_t)0x0400U)
+#define DP83848_BCR_RESTART_AUTONEGO ((uint16_t)0x0200U)
+#define DP83848_BCR_DUPLEX_MODE ((uint16_t)0x0100U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_BSR_Bit_Definition DP83848 BSR Bit Definition
+ * @{
+ */
+#define DP83848_BSR_100BASE_T4 ((uint16_t)0x8000U)
+#define DP83848_BSR_100BASE_TX_FD ((uint16_t)0x4000U)
+#define DP83848_BSR_100BASE_TX_HD ((uint16_t)0x2000U)
+#define DP83848_BSR_10BASE_T_FD ((uint16_t)0x1000U)
+#define DP83848_BSR_10BASE_T_HD ((uint16_t)0x0800U)
+#define DP83848_BSR_MF_PREAMBLE ((uint16_t)0x0040U)
+#define DP83848_BSR_AUTONEGO_CPLT ((uint16_t)0x0020U)
+#define DP83848_BSR_REMOTE_FAULT ((uint16_t)0x0010U)
+#define DP83848_BSR_AUTONEGO_ABILITY ((uint16_t)0x0008U)
+#define DP83848_BSR_LINK_STATUS ((uint16_t)0x0004U)
+#define DP83848_BSR_JABBER_DETECT ((uint16_t)0x0002U)
+#define DP83848_BSR_EXTENDED_CAP ((uint16_t)0x0001U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_PHYI1R_Bit_Definition DP83848 PHYI1R Bit Definition
+ * @{
+ */
+#define DP83848_PHYI1R_OUI_3_18 ((uint16_t)0xFFFFU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_PHYI2R_Bit_Definition DP83848 PHYI2R Bit Definition
+ * @{
+ */
+#define DP83848_PHYI2R_OUI_19_24 ((uint16_t)0xFC00U)
+#define DP83848_PHYI2R_MODEL_NBR ((uint16_t)0x03F0U)
+#define DP83848_PHYI2R_REVISION_NBR ((uint16_t)0x000FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ANAR_Bit_Definition DP83848 ANAR Bit Definition
+ * @{
+ */
+#define DP83848_ANAR_NEXT_PAGE ((uint16_t)0x8000U)
+#define DP83848_ANAR_REMOTE_FAULT ((uint16_t)0x2000U)
+#define DP83848_ANAR_PAUSE_OPERATION ((uint16_t)0x0C00U)
+#define DP83848_ANAR_PO_NOPAUSE ((uint16_t)0x0000U)
+#define DP83848_ANAR_PO_SYMMETRIC_PAUSE ((uint16_t)0x0400U)
+#define DP83848_ANAR_PO_ASYMMETRIC_PAUSE ((uint16_t)0x0800U)
+#define DP83848_ANAR_PO_ADVERTISE_SUPPORT ((uint16_t)0x0C00U)
+#define DP83848_ANAR_100BASE_TX_FD ((uint16_t)0x0100U)
+#define DP83848_ANAR_100BASE_TX ((uint16_t)0x0080U)
+#define DP83848_ANAR_10BASE_T_FD ((uint16_t)0x0040U)
+#define DP83848_ANAR_10BASE_T ((uint16_t)0x0020U)
+#define DP83848_ANAR_SELECTOR_FIELD ((uint16_t)0x000FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ANLPAR_Bit_Definition DP83848 ANLPAR Bit Definition
+ * @{
+ */
+#define DP83848_ANLPAR_NEXT_PAGE ((uint16_t)0x8000U)
+#define DP83848_ANLPAR_REMOTE_FAULT ((uint16_t)0x2000U)
+#define DP83848_ANLPAR_PAUSE_OPERATION ((uint16_t)0x0C00U)
+#define DP83848_ANLPAR_PO_NOPAUSE ((uint16_t)0x0000U)
+#define DP83848_ANLPAR_PO_SYMMETRIC_PAUSE ((uint16_t)0x0400U)
+#define DP83848_ANLPAR_PO_ASYMMETRIC_PAUSE ((uint16_t)0x0800U)
+#define DP83848_ANLPAR_PO_ADVERTISE_SUPPORT ((uint16_t)0x0C00U)
+#define DP83848_ANLPAR_100BASE_TX_FD ((uint16_t)0x0100U)
+#define DP83848_ANLPAR_100BASE_TX ((uint16_t)0x0080U)
+#define DP83848_ANLPAR_10BASE_T_FD ((uint16_t)0x0040U)
+#define DP83848_ANLPAR_10BASE_T ((uint16_t)0x0020U)
+#define DP83848_ANLPAR_SELECTOR_FIELD ((uint16_t)0x000FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ANER_Bit_Definition DP83848 ANER Bit Definition
+ * @{
+ */
+#define DP83848_ANER_RX_NP_LOCATION_ABLE ((uint16_t)0x0040U)
+#define DP83848_ANER_RX_NP_STORAGE_LOCATION ((uint16_t)0x0020U)
+#define DP83848_ANER_PARALLEL_DETECT_FAULT ((uint16_t)0x0010U)
+#define DP83848_ANER_LP_NP_ABLE ((uint16_t)0x0008U)
+#define DP83848_ANER_NP_ABLE ((uint16_t)0x0004U)
+#define DP83848_ANER_PAGE_RECEIVED ((uint16_t)0x0002U)
+#define DP83848_ANER_LP_AUTONEG_ABLE ((uint16_t)0x0001U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ANNPTR_Bit_Definition DP83848 ANNPTR Bit Definition
+ * @{
+ */
+#define DP83848_ANNPTR_NEXT_PAGE ((uint16_t)0x8000U)
+#define DP83848_ANNPTR_MESSAGE_PAGE ((uint16_t)0x2000U)
+#define DP83848_ANNPTR_ACK2 ((uint16_t)0x1000U)
+#define DP83848_ANNPTR_TOGGLE ((uint16_t)0x0800U)
+#define DP83848_ANNPTR_MESSAGE_CODE ((uint16_t)0x07FFU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ANNPRR_Bit_Definition DP83848 ANNPRR Bit Definition
+ * @{
+ */
+#define DP83848_ANNPRR_NEXT_PAGE ((uint16_t)0x8000U)
+#define DP83848_ANNPRR_ACK ((uint16_t)0x4000U)
+#define DP83848_ANNPRR_MESSAGE_PAGE ((uint16_t)0x2000U)
+#define DP83848_ANNPRR_ACK2 ((uint16_t)0x1000U)
+#define DP83848_ANNPRR_TOGGLE ((uint16_t)0x0800U)
+#define DP83848_ANNPRR_MESSAGE_CODE ((uint16_t)0x07FFU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_MMDACR_Bit_Definition DP83848 MMDACR Bit Definition
+ * @{
+ */
+#define DP83848_MMDACR_MMD_FUNCTION ((uint16_t)0xC000U)
+#define DP83848_MMDACR_MMD_FUNCTION_ADDR ((uint16_t)0x0000U)
+#define DP83848_MMDACR_MMD_FUNCTION_DATA ((uint16_t)0x4000U)
+#define DP83848_MMDACR_MMD_DEV_ADDR ((uint16_t)0x001FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_ENCTR_Bit_Definition DP83848 ENCTR Bit Definition
+ * @{
+ */
+#define DP83848_ENCTR_TX_ENABLE ((uint16_t)0x8000U)
+#define DP83848_ENCTR_TX_TIMER ((uint16_t)0x6000U)
+#define DP83848_ENCTR_TX_TIMER_1S ((uint16_t)0x0000U)
+#define DP83848_ENCTR_TX_TIMER_768MS ((uint16_t)0x2000U)
+#define DP83848_ENCTR_TX_TIMER_512MS ((uint16_t)0x4000U)
+#define DP83848_ENCTR_TX_TIMER_265MS ((uint16_t)0x6000U)
+#define DP83848_ENCTR_RX_ENABLE ((uint16_t)0x1000U)
+#define DP83848_ENCTR_RX_MAX_INTERVAL ((uint16_t)0x0C00U)
+#define DP83848_ENCTR_RX_MAX_INTERVAL_64MS ((uint16_t)0x0000U)
+#define DP83848_ENCTR_RX_MAX_INTERVAL_256MS ((uint16_t)0x0400U)
+#define DP83848_ENCTR_RX_MAX_INTERVAL_512MS ((uint16_t)0x0800U)
+#define DP83848_ENCTR_RX_MAX_INTERVAL_1S ((uint16_t)0x0C00U)
+#define DP83848_ENCTR_EX_CROSS_OVER ((uint16_t)0x0002U)
+#define DP83848_ENCTR_EX_MANUAL_CROSS_OVER ((uint16_t)0x0001U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_MCSR_Bit_Definition DP83848 MCSR Bit Definition
+ * @{
+ */
+#define DP83848_MCSR_EDPWRDOWN ((uint16_t)0x2000U)
+#define DP83848_MCSR_FARLOOPBACK ((uint16_t)0x0200U)
+#define DP83848_MCSR_ALTINT ((uint16_t)0x0040U)
+#define DP83848_MCSR_ENERGYON ((uint16_t)0x0002U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_SMR_Bit_Definition DP83848 SMR Bit Definition
+ * @{
+ */
+#define DP83848_SMR_MODE ((uint16_t)0x00E0U)
+#define DP83848_SMR_PHY_ADDR ((uint16_t)0x001FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_TPDCR_Bit_Definition DP83848 TPDCR Bit Definition
+ * @{
+ */
+#define DP83848_TPDCR_DELAY_IN ((uint16_t)0x8000U)
+#define DP83848_TPDCR_LINE_BREAK_COUNTER ((uint16_t)0x7000U)
+#define DP83848_TPDCR_PATTERN_HIGH ((uint16_t)0x0FC0U)
+#define DP83848_TPDCR_PATTERN_LOW ((uint16_t)0x003FU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_TCSR_Bit_Definition DP83848 TCSR Bit Definition
+ * @{
+ */
+#define DP83848_TCSR_TDR_ENABLE ((uint16_t)0x8000U)
+#define DP83848_TCSR_TDR_AD_FILTER_ENABLE ((uint16_t)0x4000U)
+#define DP83848_TCSR_TDR_CH_CABLE_TYPE ((uint16_t)0x0600U)
+#define DP83848_TCSR_TDR_CH_CABLE_DEFAULT ((uint16_t)0x0000U)
+#define DP83848_TCSR_TDR_CH_CABLE_SHORTED ((uint16_t)0x0200U)
+#define DP83848_TCSR_TDR_CH_CABLE_OPEN ((uint16_t)0x0400U)
+#define DP83848_TCSR_TDR_CH_CABLE_MATCH ((uint16_t)0x0600U)
+#define DP83848_TCSR_TDR_CH_STATUS ((uint16_t)0x0100U)
+#define DP83848_TCSR_TDR_CH_LENGTH ((uint16_t)0x00FFU)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_SCSIR_Bit_Definition DP83848 SCSIR Bit Definition
+ * @{
+ */
+#define DP83848_SCSIR_AUTO_MDIX_ENABLE ((uint16_t)0x8000U)
+#define DP83848_SCSIR_CHANNEL_SELECT ((uint16_t)0x2000U)
+#define DP83848_SCSIR_SQE_DISABLE ((uint16_t)0x0800U)
+#define DP83848_SCSIR_XPOLALITY ((uint16_t)0x0010U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_CLR_Bit_Definition DP83848 CLR Bit Definition
+ * @{
+ */
+#define DP83848_CLR_CABLE_LENGTH ((uint16_t)0xF000U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_IMR_ISFR_Bit_Definition DP83848 IMR ISFR Bit Definition
+ * @{
+ */
+#define DP83848_INT_8 ((uint16_t)0x0100U)
+#define DP83848_INT_7 ((uint16_t)0x0080U)
+#define DP83848_INT_6 ((uint16_t)0x0040U)
+#define DP83848_INT_5 ((uint16_t)0x0020U)
+#define DP83848_INT_4 ((uint16_t)0x0010U)
+#define DP83848_INT_3 ((uint16_t)0x0008U)
+#define DP83848_INT_2 ((uint16_t)0x0004U)
+#define DP83848_INT_1 ((uint16_t)0x0002U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_PHYSCSR_Bit_Definition DP83848 PHYSCSR Bit Definition
+ * @{
+ */
+#define DP83848_PHYSCSR_AUTONEGO_DONE ((uint16_t)0x100U)
+#define DP83848_PHYSCSR_HCDSPEEDMASK ((uint16_t)0x006U)
+#define DP83848_PHYSCSR_10BT_HD ((uint16_t)0x002U)
+#define DP83848_PHYSCSR_10BT_FD ((uint16_t)0x006U)
+#define DP83848_PHYSCSR_100BTX_HD ((uint16_t)0x000U)
+#define DP83848_PHYSCSR_100BTX_FD ((uint16_t)0x004U)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_Status DP83848 Status
+ * @{
+ */
+
+#define DP83848_STATUS_READ_ERROR ((int32_t)-5)
+#define DP83848_STATUS_WRITE_ERROR ((int32_t)-4)
+#define DP83848_STATUS_ADDRESS_ERROR ((int32_t)-3)
+#define DP83848_STATUS_RESET_TIMEOUT ((int32_t)-2)
+#define DP83848_STATUS_ERROR ((int32_t)-1)
+#define DP83848_STATUS_OK ((int32_t) 0)
+#define DP83848_STATUS_LINK_DOWN ((int32_t) 1)
+#define DP83848_STATUS_100MBITS_FULLDUPLEX ((int32_t) 2)
+#define DP83848_STATUS_100MBITS_HALFDUPLEX ((int32_t) 3)
+#define DP83848_STATUS_10MBITS_FULLDUPLEX ((int32_t) 4)
+#define DP83848_STATUS_10MBITS_HALFDUPLEX ((int32_t) 5)
+#define DP83848_STATUS_AUTONEGO_NOTDONE ((int32_t) 6)
+/**
+ * @}
+ */
+
+/** @defgroup DP83848_IT_Flags DP83848 IT Flags
+ * @{
+ */
+#define DP83848_WOL_IT DP83848_INT_8
+#define DP83848_ENERGYON_IT DP83848_INT_7
+#define DP83848_AUTONEGO_COMPLETE_IT DP83848_INT_6
+#define DP83848_REMOTE_FAULT_IT DP83848_INT_5
+#define DP83848_LINK_DOWN_IT DP83848_INT_4
+#define DP83848_AUTONEGO_LP_ACK_IT DP83848_INT_3
+#define DP83848_PARALLEL_DETECTION_FAULT_IT DP83848_INT_2
+#define DP83848_AUTONEGO_PAGE_RECEIVED_IT DP83848_INT_1
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/* Exported types ------------------------------------------------------------*/
+/** @defgroup DP83848_Exported_Types DP83848 Exported Types
+ * @{
+ */
+typedef int32_t (*dp83848_Init_Func) (void);
+typedef int32_t (*dp83848_DeInit_Func) (void);
+typedef int32_t (*dp83848_ReadReg_Func) (uint32_t, uint32_t, uint32_t *);
+typedef int32_t (*dp83848_WriteReg_Func) (uint32_t, uint32_t, uint32_t);
+typedef int32_t (*dp83848_GetTick_Func) (void);
+
+typedef struct
+{
+ dp83848_Init_Func Init;
+ dp83848_DeInit_Func DeInit;
+ dp83848_WriteReg_Func WriteReg;
+ dp83848_ReadReg_Func ReadReg;
+ dp83848_GetTick_Func GetTick;
+} dp83848_IOCtx_t;
+
+
+typedef struct
+{
+ uint32_t DevAddr;
+ uint32_t Is_Initialized;
+ dp83848_IOCtx_t IO;
+ void *pData;
+}dp83848_Object_t;
+/**
+ * @}
+ */
+
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+/** @defgroup DP83848_Exported_Functions DP83848 Exported Functions
+ * @{
+ */
+int32_t DP83848_RegisterBusIO(dp83848_Object_t *pObj, dp83848_IOCtx_t *ioctx);
+int32_t DP83848_Init(dp83848_Object_t *pObj);
+int32_t DP83848_DeInit(dp83848_Object_t *pObj);
+int32_t DP83848_DisablePowerDownMode(dp83848_Object_t *pObj);
+int32_t DP83848_EnablePowerDownMode(dp83848_Object_t *pObj);
+int32_t DP83848_StartAutoNego(dp83848_Object_t *pObj);
+int32_t DP83848_GetLinkState(dp83848_Object_t *pObj);
+int32_t DP83848_SetLinkState(dp83848_Object_t *pObj, uint32_t LinkState);
+int32_t DP83848_EnableLoopbackMode(dp83848_Object_t *pObj);
+int32_t DP83848_DisableLoopbackMode(dp83848_Object_t *pObj);
+int32_t DP83848_EnableIT(dp83848_Object_t *pObj, uint32_t Interrupt);
+int32_t DP83848_DisableIT(dp83848_Object_t *pObj, uint32_t Interrupt);
+int32_t DP83848_ClearIT(dp83848_Object_t *pObj, uint32_t Interrupt);
+int32_t DP83848_GetITStatus(dp83848_Object_t *pObj, uint32_t Interrupt);
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* DP83848_H */
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
diff --git a/stm32/ethernetif.c b/stm32/ethernetif.c
new file mode 100644
index 0000000..e54c8b6
--- /dev/null
+++ b/stm32/ethernetif.c
@@ -0,0 +1,737 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * File Name : ethernetif.c
+ * Description : This file provides code for the configuration
+ * of the ethernetif.c MiddleWare.
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2022 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+#include "lwip/opt.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/timeouts.h"
+#include "netif/ethernet.h"
+#include "netif/etharp.h"
+#include "lwip/ethip6.h"
+#include "ethernetif.h"
+#include "dp83848.h"
+#include <string.h>
+
+/* Within 'USER CODE' section, code will be kept by default at each generation */
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* Private define ------------------------------------------------------------*/
+
+/* Network interface name */
+#define IFNAME0 's'
+#define IFNAME1 't'
+
+/* ETH Setting */
+#define ETH_DMA_TRANSMIT_TIMEOUT ( 20U )
+#define ETH_TX_BUFFER_MAX ((ETH_TX_DESC_CNT) * 2U)
+/* ETH_RX_BUFFER_SIZE parameter is defined in lwipopts.h */
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/* Private variables ---------------------------------------------------------*/
+/*
+ at Note: This interface is implemented to operate in zero-copy mode only:
+ - Rx buffers are allocated statically and passed directly to the LwIP stack
+ they will return back to ETH DMA after been processed by the stack.
+ - Tx Buffers will be allocated from LwIP stack memory heap,
+ then passed to ETH HAL driver.
+
+ at Notes:
+ 1.a. ETH DMA Rx descriptors must be contiguous, the default count is 4,
+ to customize it please redefine ETH_RX_DESC_CNT in ETH GUI (Rx Descriptor Length)
+ so that updated value will be generated in stm32xxxx_hal_conf.h
+ 1.b. ETH DMA Tx descriptors must be contiguous, the default count is 4,
+ to customize it please redefine ETH_TX_DESC_CNT in ETH GUI (Tx Descriptor Length)
+ so that updated value will be generated in stm32xxxx_hal_conf.h
+
+ 2.a. Rx Buffers number must be between ETH_RX_DESC_CNT and 2*ETH_RX_DESC_CNT
+ 2.b. Rx Buffers must have the same size: ETH_RX_BUFFER_SIZE, this value must
+ passed to ETH DMA in the init field (heth.Init.RxBuffLen)
+ 2.c The RX Ruffers addresses and sizes must be properly defined to be aligned
+ to L1-CACHE line size (32 bytes).
+*/
+
+/* Data Type Definitions */
+typedef enum
+{
+ RX_ALLOC_OK = 0x00,
+ RX_ALLOC_ERROR = 0x01
+} RxAllocStatusTypeDef;
+
+typedef struct
+{
+ struct pbuf_custom pbuf_custom;
+ uint8_t buff[(ETH_RX_BUFFER_SIZE + 31) & ~31] __ALIGNED(32);
+} RxBuff_t;
+
+/* Memory Pool Declaration */
+#define ETH_RX_BUFFER_CNT 12U
+LWIP_MEMPOOL_DECLARE(RX_POOL, ETH_RX_BUFFER_CNT, sizeof(RxBuff_t), "Zero-copy RX PBUF pool");
+
+/* Variable Definitions */
+static uint8_t RxAllocStatus;
+
+__IO uint32_t TxPkt = 0;
+__IO uint32_t RxPkt = 0;
+
+ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
+ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
+
+/* USER CODE BEGIN 2 */
+
+/* USER CODE END 2 */
+
+/* Global Ethernet handle */
+ETH_HandleTypeDef heth;
+ETH_TxPacketConfig TxConfig;
+
+/* Private function prototypes -----------------------------------------------*/
+int32_t ETH_PHY_IO_Init(void);
+int32_t ETH_PHY_IO_DeInit (void);
+int32_t ETH_PHY_IO_ReadReg(uint32_t DevAddr, uint32_t RegAddr, uint32_t *pRegVal);
+int32_t ETH_PHY_IO_WriteReg(uint32_t DevAddr, uint32_t RegAddr, uint32_t RegVal);
+int32_t ETH_PHY_IO_GetTick(void);
+
+dp83848_Object_t DP83848;
+dp83848_IOCtx_t DP83848_IOCtx = {ETH_PHY_IO_Init,
+ ETH_PHY_IO_DeInit,
+ ETH_PHY_IO_WriteReg,
+ ETH_PHY_IO_ReadReg,
+ ETH_PHY_IO_GetTick};
+
+/* USER CODE BEGIN 3 */
+
+/* USER CODE END 3 */
+
+/* Private functions ---------------------------------------------------------*/
+void pbuf_free_custom(struct pbuf *p);
+
+/* USER CODE BEGIN 4 */
+
+/* USER CODE END 4 */
+
+/*******************************************************************************
+ LL Driver Interface ( LwIP stack --> ETH)
+*******************************************************************************/
+/**
+ * @brief In this function, the hardware should be initialized.
+ * Called from ethernetif_init().
+ *
+ * @param netif the already initialized lwip network interface structure
+ * for this ethernetif
+ */
+static void low_level_init(struct netif *netif)
+{
+ HAL_StatusTypeDef hal_eth_init_status = HAL_OK;
+ /* Start ETH HAL Init */
+
+ uint8_t MACAddr[6] ;
+ heth.Instance = ETH;
+ MACAddr[0] = 0x02;
+ MACAddr[1] = 0x00;
+ MACAddr[2] = 0x00;
+ MACAddr[3] = 0x00;
+ MACAddr[4] = 0x00;
+ MACAddr[5] = 0x01;
+ heth.Init.MACAddr = &MACAddr[0];
+ heth.Init.MediaInterface = HAL_ETH_RMII_MODE;
+ heth.Init.TxDesc = DMATxDscrTab;
+ heth.Init.RxDesc = DMARxDscrTab;
+ heth.Init.RxBuffLen = 1536;
+
+ /* USER CODE BEGIN MACADDRESS */
+
+ /* USER CODE END MACADDRESS */
+
+ hal_eth_init_status = HAL_ETH_Init(&heth);
+
+ memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfig));
+ TxConfig.Attributes = ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD;
+ TxConfig.ChecksumCtrl = ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC;
+ TxConfig.CRCPadCtrl = ETH_CRC_PAD_INSERT;
+
+ /* End ETH HAL Init */
+
+ /* Initialize the RX POOL */
+ LWIP_MEMPOOL_INIT(RX_POOL);
+
+#if LWIP_ARP || LWIP_ETHERNET
+
+ /* set MAC hardware address length */
+ netif->hwaddr_len = ETH_HWADDR_LEN;
+
+ /* set MAC hardware address */
+ netif->hwaddr[0] = heth.Init.MACAddr[0];
+ netif->hwaddr[1] = heth.Init.MACAddr[1];
+ netif->hwaddr[2] = heth.Init.MACAddr[2];
+ netif->hwaddr[3] = heth.Init.MACAddr[3];
+ netif->hwaddr[4] = heth.Init.MACAddr[4];
+ netif->hwaddr[5] = heth.Init.MACAddr[5];
+
+ /* maximum transfer unit */
+ netif->mtu = ETH_MAX_PAYLOAD;
+
+ /* Accept broadcast address and ARP traffic */
+ /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
+ #if LWIP_ARP
+ netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
+ #else
+ netif->flags |= NETIF_FLAG_BROADCAST;
+ #endif /* LWIP_ARP */
+
+/* USER CODE BEGIN PHY_PRE_CONFIG */
+
+/* USER CODE END PHY_PRE_CONFIG */
+ /* Set PHY IO functions */
+ DP83848_RegisterBusIO(&DP83848, &DP83848_IOCtx);
+
+ /* Initialize the DP83848 ETH PHY */
+ DP83848_Init(&DP83848);
+
+ if (hal_eth_init_status == HAL_OK)
+ {
+ /* Get link state */
+ ethernet_link_check_state(netif);
+ }
+ else
+ {
+ Error_Handler();
+ }
+#endif /* LWIP_ARP || LWIP_ETHERNET */
+
+/* USER CODE BEGIN LOW_LEVEL_INIT */
+
+/* USER CODE END LOW_LEVEL_INIT */
+}
+
+/**
+ * This function should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
+ * @return ERR_OK if the packet could be sent
+ * an err_t value if the packet couldn't be sent
+ *
+ * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
+ * strange results. You might consider waiting for space in the DMA queue
+ * to become available since the stack doesn't retry to send a packet
+ * dropped because of memory failure (except for the TCP timers).
+ */
+
+static err_t low_level_output(struct netif *netif, struct pbuf *p)
+{
+ uint32_t i = 0U;
+ struct pbuf *q = NULL;
+ err_t errval = ERR_OK;
+ ETH_BufferTypeDef Txbuffer[ETH_TX_DESC_CNT];
+
+ memset(Txbuffer, 0 , ETH_TX_DESC_CNT*sizeof(ETH_BufferTypeDef));
+
+ for(q = p; q != NULL; q = q->next)
+ {
+ if(i >= ETH_TX_DESC_CNT)
+ return ERR_IF;
+
+ Txbuffer[i].buffer = q->payload;
+ Txbuffer[i].len = q->len;
+
+ if(i>0)
+ {
+ Txbuffer[i-1].next = &Txbuffer[i];
+ }
+
+ if(q->next == NULL)
+ {
+ Txbuffer[i].next = NULL;
+ }
+
+ i++;
+ }
+
+ TxConfig.Length = p->tot_len;
+ TxConfig.TxBuffer = Txbuffer;
+ TxConfig.pData = p;
+
+ HAL_ETH_Transmit(&heth, &TxConfig, ETH_DMA_TRANSMIT_TIMEOUT);
+
+ return errval;
+}
+
+/**
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @return a pbuf filled with the received packet (including MAC header)
+ * NULL on memory error
+ */
+static struct pbuf * low_level_input(struct netif *netif)
+{
+ struct pbuf *p = NULL;
+
+ if(RxAllocStatus == RX_ALLOC_OK)
+ {
+ HAL_ETH_ReadData(&heth, (void **)&p);
+ }
+
+ return p;
+}
+
+/**
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface. Then the type of the received packet is determined and
+ * the appropriate input function is called.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ */
+void ethernetif_input(struct netif *netif)
+{
+ struct pbuf *p = NULL;
+
+ do
+ {
+ p = low_level_input( netif );
+ if (p != NULL)
+ {
+ if (netif->input( p, netif) != ERR_OK )
+ {
+ pbuf_free(p);
+ }
+ }
+ } while(p!=NULL);
+}
+
+#if !LWIP_ARP
+/**
+ * This function has to be completed by user in case of ARP OFF.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @return ERR_OK if ...
+ */
+static err_t low_level_output_arp_off(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr)
+{
+ err_t errval;
+ errval = ERR_OK;
+
+/* USER CODE BEGIN 5 */
+
+/* USER CODE END 5 */
+
+ return errval;
+
+}
+#endif /* LWIP_ARP */
+
+/**
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ * This function should be passed as a parameter to netif_add().
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @return ERR_OK if the loopif is initialized
+ * ERR_MEM if private data couldn't be allocated
+ * any other err_t on error
+ */
+err_t ethernetif_init(struct netif *netif)
+{
+ LWIP_ASSERT("netif != NULL", (netif != NULL));
+
+#if LWIP_NETIF_HOSTNAME
+ /* Initialize interface hostname */
+ netif->hostname = "lwip";
+#endif /* LWIP_NETIF_HOSTNAME */
+
+ /*
+ * Initialize the snmp variables and counters inside the struct netif.
+ * The last argument should be replaced with your link speed, in units
+ * of bits per second.
+ */
+ // MIB2_INIT_NETIF(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
+
+ netif->name[0] = IFNAME0;
+ netif->name[1] = IFNAME1;
+ /* We directly use etharp_output() here to save a function call.
+ * You can instead declare your own function an call etharp_output()
+ * from it if you have to do some checks before sending (e.g. if link
+ * is available...) */
+
+#if LWIP_IPV4
+#if LWIP_ARP || LWIP_ETHERNET
+#if LWIP_ARP
+ netif->output = etharp_output;
+#else
+ /* The user should write its own code in low_level_output_arp_off function */
+ netif->output = low_level_output_arp_off;
+#endif /* LWIP_ARP */
+#endif /* LWIP_ARP || LWIP_ETHERNET */
+#endif /* LWIP_IPV4 */
+
+#if LWIP_IPV6
+ netif->output_ip6 = ethip6_output;
+#endif /* LWIP_IPV6 */
+
+ netif->linkoutput = low_level_output;
+
+ /* initialize the hardware */
+ low_level_init(netif);
+
+ return ERR_OK;
+}
+
+/**
+ * @brief Custom Rx pbuf free callback
+ * @param pbuf: pbuf to be freed
+ * @retval None
+ */
+void pbuf_free_custom(struct pbuf *p)
+{
+ struct pbuf_custom* custom_pbuf = (struct pbuf_custom*)p;
+ LWIP_MEMPOOL_FREE(RX_POOL, custom_pbuf);
+
+ /* If the Rx Buffer Pool was exhausted, signal the ethernetif_input task to
+ * call HAL_ETH_GetRxDataBuffer to rebuild the Rx descriptors. */
+
+ if (RxAllocStatus == RX_ALLOC_ERROR)
+ {
+ RxAllocStatus = RX_ALLOC_OK;
+ RxPkt = 1 ;
+ }
+}
+
+/* USER CODE BEGIN 6 */
+
+/**
+* @brief Returns the current time in milliseconds
+* when LWIP_TIMERS == 1 and NO_SYS == 1
+* @param None
+* @retval Current Time value
+*/
+u32_t sys_now(void)
+{
+ return HAL_GetTick();
+}
+
+/* USER CODE END 6 */
+
+void HAL_ETH_MspInit(ETH_HandleTypeDef* ethHandle)
+{
+ GPIO_InitTypeDef GPIO_InitStruct = {0};
+ if(ethHandle->Instance==ETH)
+ {
+ /* USER CODE BEGIN ETH_MspInit 0 */
+
+ /* USER CODE END ETH_MspInit 0 */
+ /* Enable Peripheral clock */
+ __HAL_RCC_ETH_CLK_ENABLE();
+
+ __HAL_RCC_GPIOC_CLK_ENABLE();
+ __HAL_RCC_GPIOA_CLK_ENABLE();
+ __HAL_RCC_GPIOB_CLK_ENABLE();
+ /**ETH GPIO Configuration
+ PC1 ------> ETH_MDC
+ PA1 ------> ETH_REF_CLK
+ PA2 ------> ETH_MDIO
+ PA7 ------> ETH_CRS_DV
+ PC4 ------> ETH_RXD0
+ PC5 ------> ETH_RXD1
+ PB11 ------> ETH_TX_EN
+ PB12 ------> ETH_TXD0
+ PB13 ------> ETH_TXD1
+ */
+ GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5;
+ GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+ GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
+ HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+ GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_7;
+ GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+ GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
+ HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+ GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13;
+ GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+ GPIO_InitStruct.Pull = GPIO_NOPULL;
+ GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+ GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
+ HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+ /* USER CODE BEGIN ETH_MspInit 1 */
+
+ /* USER CODE END ETH_MspInit 1 */
+ }
+}
+
+void HAL_ETH_MspDeInit(ETH_HandleTypeDef* ethHandle)
+{
+ if(ethHandle->Instance==ETH)
+ {
+ /* USER CODE BEGIN ETH_MspDeInit 0 */
+
+ /* USER CODE END ETH_MspDeInit 0 */
+ /* Peripheral clock disable */
+ __HAL_RCC_ETH_CLK_DISABLE();
+
+ /**ETH GPIO Configuration
+ PC1 ------> ETH_MDC
+ PA1 ------> ETH_REF_CLK
+ PA2 ------> ETH_MDIO
+ PA7 ------> ETH_CRS_DV
+ PC4 ------> ETH_RXD0
+ PC5 ------> ETH_RXD1
+ PB11 ------> ETH_TX_EN
+ PB12 ------> ETH_TXD0
+ PB13 ------> ETH_TXD1
+ */
+ HAL_GPIO_DeInit(GPIOC, GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5);
+
+ HAL_GPIO_DeInit(GPIOA, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_7);
+
+ HAL_GPIO_DeInit(GPIOB, GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13);
+
+ /* USER CODE BEGIN ETH_MspDeInit 1 */
+
+ /* USER CODE END ETH_MspDeInit 1 */
+ }
+}
+
+/*******************************************************************************
+ PHI IO Functions
+*******************************************************************************/
+/**
+ * @brief Initializes the MDIO interface GPIO and clocks.
+ * @param None
+ * @retval 0 if OK, -1 if ERROR
+ */
+int32_t ETH_PHY_IO_Init(void)
+{
+ /* We assume that MDIO GPIO configuration is already done
+ in the ETH_MspInit() else it should be done here
+ */
+
+ /* Configure the MDIO Clock */
+ HAL_ETH_SetMDIOClockRange(&heth);
+
+ return 0;
+}
+
+/**
+ * @brief De-Initializes the MDIO interface .
+ * @param None
+ * @retval 0 if OK, -1 if ERROR
+ */
+int32_t ETH_PHY_IO_DeInit (void)
+{
+ return 0;
+}
+
+/**
+ * @brief Read a PHY register through the MDIO interface.
+ * @param DevAddr: PHY port address
+ * @param RegAddr: PHY register address
+ * @param pRegVal: pointer to hold the register value
+ * @retval 0 if OK -1 if Error
+ */
+int32_t ETH_PHY_IO_ReadReg(uint32_t DevAddr, uint32_t RegAddr, uint32_t *pRegVal)
+{
+ if(HAL_ETH_ReadPHYRegister(&heth, DevAddr, RegAddr, pRegVal) != HAL_OK)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Write a value to a PHY register through the MDIO interface.
+ * @param DevAddr: PHY port address
+ * @param RegAddr: PHY register address
+ * @param RegVal: Value to be written
+ * @retval 0 if OK -1 if Error
+ */
+int32_t ETH_PHY_IO_WriteReg(uint32_t DevAddr, uint32_t RegAddr, uint32_t RegVal)
+{
+ if(HAL_ETH_WritePHYRegister(&heth, DevAddr, RegAddr, RegVal) != HAL_OK)
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Get the time in millisecons used for internal PHY driver process.
+ * @retval Time value
+ */
+int32_t ETH_PHY_IO_GetTick(void)
+{
+ return HAL_GetTick();
+}
+
+/**
+ * @brief Check the ETH link state then update ETH driver and netif link accordingly.
+ * @param argument: netif
+ * @retval None
+ */
+void ethernet_link_check_state(struct netif *netif)
+{
+ ETH_MACConfigTypeDef MACConf = {0};
+ int32_t PHYLinkState = 0;
+ uint32_t linkchanged = 0U, speed = 0U, duplex = 0U;
+
+ PHYLinkState = DP83848_GetLinkState(&DP83848);
+
+ if(netif_is_link_up(netif) && (PHYLinkState <= DP83848_STATUS_LINK_DOWN))
+ {
+ HAL_ETH_Stop(&heth);
+ netif_set_down(netif);
+ netif_set_link_down(netif);
+ }
+ else if(!netif_is_link_up(netif) && (PHYLinkState > DP83848_STATUS_LINK_DOWN))
+ {
+ switch (PHYLinkState)
+ {
+ case DP83848_STATUS_100MBITS_FULLDUPLEX:
+ duplex = ETH_FULLDUPLEX_MODE;
+ speed = ETH_SPEED_100M;
+ linkchanged = 1;
+ break;
+ case DP83848_STATUS_100MBITS_HALFDUPLEX:
+ duplex = ETH_HALFDUPLEX_MODE;
+ speed = ETH_SPEED_100M;
+ linkchanged = 1;
+ break;
+ case DP83848_STATUS_10MBITS_FULLDUPLEX:
+ duplex = ETH_FULLDUPLEX_MODE;
+ speed = ETH_SPEED_10M;
+ linkchanged = 1;
+ break;
+ case DP83848_STATUS_10MBITS_HALFDUPLEX:
+ duplex = ETH_HALFDUPLEX_MODE;
+ speed = ETH_SPEED_10M;
+ linkchanged = 1;
+ break;
+ default:
+ break;
+ }
+
+ if(linkchanged)
+ {
+ /* Get MAC Config MAC */
+ HAL_ETH_GetMACConfig(&heth, &MACConf);
+ MACConf.DuplexMode = duplex;
+ MACConf.Speed = speed;
+ HAL_ETH_SetMACConfig(&heth, &MACConf);
+ HAL_ETH_Start(&heth);
+ netif_set_up(netif);
+ netif_set_link_up(netif);
+ }
+ }
+
+}
+
+void HAL_ETH_RxAllocateCallback(uint8_t **buff)
+{
+/* USER CODE BEGIN HAL ETH RxAllocateCallback */
+
+ struct pbuf_custom *p = LWIP_MEMPOOL_ALLOC(RX_POOL);
+ if (p)
+ {
+ /* Get the buff from the struct pbuf address. */
+ *buff = (uint8_t *)p + offsetof(RxBuff_t, buff);
+ p->custom_free_function = pbuf_free_custom;
+ /* Initialize the struct pbuf.
+ * This must be performed whenever a buffer's allocated because it may be
+ * changed by lwIP or the app, e.g., pbuf_free decrements ref. */
+ pbuf_alloced_custom(PBUF_RAW, 0, PBUF_REF, p, *buff, ETH_RX_BUFFER_SIZE);
+ }
+ else
+ {
+ RxAllocStatus = RX_ALLOC_ERROR;
+ *buff = NULL;
+ }
+/* USER CODE END HAL ETH RxAllocateCallback */
+}
+
+void HAL_ETH_RxLinkCallback(void **pStart, void **pEnd, uint8_t *buff, uint16_t Length)
+{
+/* USER CODE BEGIN HAL ETH RxLinkCallback */
+
+ struct pbuf **ppStart = (struct pbuf **)pStart;
+ struct pbuf **ppEnd = (struct pbuf **)pEnd;
+ struct pbuf *p = NULL;
+
+ /* Get the struct pbuf from the buff address. */
+ p = (struct pbuf *)(buff - offsetof(RxBuff_t, buff));
+ p->next = NULL;
+ p->tot_len = 0;
+ p->len = Length;
+
+ /* Chain the buffer. */
+ if (!*ppStart)
+ {
+ /* The first buffer of the packet. */
+ *ppStart = p;
+ }
+ else
+ {
+ /* Chain the buffer to the end of the packet. */
+ (*ppEnd)->next = p;
+ }
+ *ppEnd = p;
+
+ /* Update the total length of all the buffers of the chain. Each pbuf in the chain should have its tot_len
+ * set to its own length, plus the length of all the following pbufs in the chain. */
+ for (p = *ppStart; p != NULL; p = p->next)
+ {
+ p->tot_len += Length;
+ }
+
+/* USER CODE END HAL ETH RxLinkCallback */
+}
+
+void HAL_ETH_TxFreeCallback(uint32_t * buff)
+{
+/* USER CODE BEGIN HAL ETH TxFreeCallback */
+
+ pbuf_free((struct pbuf *)buff);
+
+/* USER CODE END HAL ETH TxFreeCallback */
+}
+
+/* USER CODE BEGIN 8 */
+
+/* USER CODE END 8 */
+
diff --git a/stm32/ethernetif.h b/stm32/ethernetif.h
new file mode 100644
index 0000000..76eb91b
--- /dev/null
+++ b/stm32/ethernetif.h
@@ -0,0 +1,45 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * File Name : ethernetif.h
+ * Description : This file provides initialization code for LWIP
+ * middleWare.
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2022 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+#ifndef __ETHERNETIF_H__
+#define __ETHERNETIF_H__
+
+#include "lwip/err.h"
+#include "lwip/netif.h"
+
+/* Within 'USER CODE' section, code will be kept by default at each generation */
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* Exported functions ------------------------------------------------------- */
+err_t ethernetif_init(struct netif *netif);
+
+void ethernetif_input(struct netif *netif);
+void ethernet_link_check_state(struct netif *netif);
+
+void Error_Handler(void);
+u32_t sys_jiffies(void);
+u32_t sys_now(void);
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+#endif
diff --git a/stm32/lwip.c b/stm32/lwip.c
new file mode 100644
index 0000000..9b2af8a
--- /dev/null
+++ b/stm32/lwip.c
@@ -0,0 +1,260 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * File Name : LWIP.c
+ * Description : This file provides initialization code for LWIP
+ * middleWare.
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2022 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "lwip.h"
+#include "lwip/init.h"
+#include "lwip/netif.h"
+#if defined ( __CC_ARM ) /* MDK ARM Compiler */
+#include "lwip/sio.h"
+#endif /* MDK ARM Compiler */
+#include "ethernetif.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+/* Private function prototypes -----------------------------------------------*/
+static void ethernet_link_status_updated(struct netif *netif);
+static void Ethernet_Link_Periodic_Handle(struct netif *netif);
+/* ETH Variables initialization ----------------------------------------------*/
+void Error_Handler(void);
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+uint32_t EthernetLinkTimer;
+
+/* Variables Initialization */
+struct netif gnetif;
+ip4_addr_t ipaddr;
+ip4_addr_t netmask;
+ip4_addr_t gw;
+uint8_t IP_ADDRESS[4];
+uint8_t NETMASK_ADDRESS[4];
+uint8_t GATEWAY_ADDRESS[4];
+
+/* USER CODE BEGIN 2 */
+
+/* USER CODE END 2 */
+
+/**
+ * LwIP initialization function
+ */
+void MX_LWIP_Init(void)
+{
+ /* IP addresses initialization */
+ IP_ADDRESS[0] = 192;
+ IP_ADDRESS[1] = 168;
+ IP_ADDRESS[2] = 68;
+ IP_ADDRESS[3] = 22;
+ NETMASK_ADDRESS[0] = 255;
+ NETMASK_ADDRESS[1] = 255;
+ NETMASK_ADDRESS[2] = 255;
+ NETMASK_ADDRESS[3] = 0;
+ GATEWAY_ADDRESS[0] = 192;
+ GATEWAY_ADDRESS[1] = 168;
+ GATEWAY_ADDRESS[2] = 68;
+ GATEWAY_ADDRESS[3] = 1;
+
+/* USER CODE BEGIN IP_ADDRESSES */
+/* USER CODE END IP_ADDRESSES */
+
+ /* Initilialize the LwIP stack without RTOS */
+ lwip_init();
+
+ /* IP addresses initialization without DHCP (IPv4) */
+ IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);
+ IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);
+ IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);
+
+ /* add the network interface (IPv4/IPv6) without RTOS */
+ netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, ðernetif_init, ðernet_input);
+
+ /* Registers the default network interface */
+ netif_set_default(&gnetif);
+
+ if (netif_is_link_up(&gnetif))
+ {
+ /* When the netif is fully configured this function must be called */
+ netif_set_up(&gnetif);
+ }
+ else
+ {
+ /* When the netif link is down this function must be called */
+ netif_set_down(&gnetif);
+ }
+
+ /* Set the link callback function, this function is called on change of link status*/
+ netif_set_link_callback(&gnetif, ethernet_link_status_updated);
+
+ /* Create the Ethernet link handler thread */
+
+/* USER CODE BEGIN 3 */
+
+/* USER CODE END 3 */
+}
+
+#ifdef USE_OBSOLETE_USER_CODE_SECTION_4
+/* Kept to help code migration. (See new 4_1, 4_2... sections) */
+/* Avoid to use this user section which will become obsolete. */
+/* USER CODE BEGIN 4 */
+/* USER CODE END 4 */
+#endif
+
+/**
+ * @brief Ethernet Link periodic check
+ * @param netif
+ * @retval None
+ */
+static void Ethernet_Link_Periodic_Handle(struct netif *netif)
+{
+/* USER CODE BEGIN 4_4_1 */
+/* USER CODE END 4_4_1 */
+
+ /* Ethernet Link every 100ms */
+ if (HAL_GetTick() - EthernetLinkTimer >= 100)
+ {
+ EthernetLinkTimer = HAL_GetTick();
+ ethernet_link_check_state(netif);
+ }
+/* USER CODE BEGIN 4_4 */
+/* USER CODE END 4_4 */
+}
+
+/**
+ * ----------------------------------------------------------------------
+ * Function given to help user to continue LwIP Initialization
+ * Up to user to complete or change this function ...
+ * Up to user to call this function in main.c in while (1) of main(void)
+ *-----------------------------------------------------------------------
+ * Read a received packet from the Ethernet buffers
+ * Send it to the lwIP stack for handling
+ * Handle timeouts if LWIP_TIMERS is set and without RTOS
+ * Handle the llink status if LWIP_NETIF_LINK_CALLBACK is set and without RTOS
+ */
+void MX_LWIP_Process(void)
+{
+/* USER CODE BEGIN 4_1 */
+/* USER CODE END 4_1 */
+ ethernetif_input(&gnetif);
+
+/* USER CODE BEGIN 4_2 */
+/* USER CODE END 4_2 */
+ /* Handle timeouts */
+ sys_check_timeouts();
+
+ Ethernet_Link_Periodic_Handle(&gnetif);
+
+/* USER CODE BEGIN 4_3 */
+/* USER CODE END 4_3 */
+}
+
+/**
+ * @brief Notify the User about the network interface config status
+ * @param netif: the network interface
+ * @retval None
+ */
+static void ethernet_link_status_updated(struct netif *netif)
+{
+ if (netif_is_up(netif))
+ {
+/* USER CODE BEGIN 5 */
+/* USER CODE END 5 */
+ }
+ else /* netif is down */
+ {
+/* USER CODE BEGIN 6 */
+/* USER CODE END 6 */
+ }
+}
+
+#if defined ( __CC_ARM ) /* MDK ARM Compiler */
+/**
+ * Opens a serial device for communication.
+ *
+ * @param devnum device number
+ * @return handle to serial device if successful, NULL otherwise
+ */
+sio_fd_t sio_open(u8_t devnum)
+{
+ sio_fd_t sd;
+
+/* USER CODE BEGIN 7 */
+ sd = 0; // dummy code
+/* USER CODE END 7 */
+
+ return sd;
+}
+
+/**
+ * Sends a single character to the serial device.
+ *
+ * @param c character to send
+ * @param fd serial device handle
+ *
+ * @note This function will block until the character can be sent.
+ */
+void sio_send(u8_t c, sio_fd_t fd)
+{
+/* USER CODE BEGIN 8 */
+/* USER CODE END 8 */
+}
+
+/**
+ * Reads from the serial device.
+ *
+ * @param fd serial device handle
+ * @param data pointer to data buffer for receiving
+ * @param len maximum length (in bytes) of data to receive
+ * @return number of bytes actually received - may be 0 if aborted by sio_read_abort
+ *
+ * @note This function will block until data can be received. The blocking
+ * can be cancelled by calling sio_read_abort().
+ */
+u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
+{
+ u32_t recved_bytes;
+
+/* USER CODE BEGIN 9 */
+ recved_bytes = 0; // dummy code
+/* USER CODE END 9 */
+ return recved_bytes;
+}
+
+/**
+ * Tries to read from the serial device. Same as sio_read but returns
+ * immediately if no data is available and never blocks.
+ *
+ * @param fd serial device handle
+ * @param data pointer to data buffer for receiving
+ * @param len maximum length (in bytes) of data to receive
+ * @return number of bytes actually received
+ */
+u32_t sio_tryread(sio_fd_t fd, u8_t *data, u32_t len)
+{
+ u32_t recved_bytes;
+
+/* USER CODE BEGIN 10 */
+ recved_bytes = 0; // dummy code
+/* USER CODE END 10 */
+ return recved_bytes;
+}
+#endif /* MDK ARM Compiler */
+
diff --git a/stm32/lwip.h b/stm32/lwip.h
new file mode 100644
index 0000000..02df90e
--- /dev/null
+++ b/stm32/lwip.h
@@ -0,0 +1,76 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * File Name : LWIP.h
+ * Description : This file provides code for the configuration
+ * of the LWIP.
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2022 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ *************************************************************************
+
+ */
+/* USER CODE END Header */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __mx_lwip_H
+#define __mx_lwip_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "lwip/opt.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "netif/etharp.h"
+#include "lwip/dhcp.h"
+#include "lwip/netif.h"
+#include "lwip/timeouts.h"
+#include "ethernetif.h"
+
+/* Includes for RTOS ---------------------------------------------------------*/
+#if WITH_RTOS
+#include "lwip/tcpip.h"
+#endif /* WITH_RTOS */
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* Global Variables ----------------------------------------------------------*/
+extern ETH_HandleTypeDef heth;
+
+/* LWIP init function */
+void MX_LWIP_Init(void);
+
+#if !WITH_RTOS
+/* USER CODE BEGIN 1 */
+/* Function defined in lwip.c to:
+ * - Read a received packet from the Ethernet buffers
+ * - Send it to the lwIP stack for handling
+ * - Handle timeouts if NO_SYS_NO_TIMERS not set
+ */
+void MX_LWIP_Process(void);
+
+/* USER CODE END 1 */
+#endif /* WITH_RTOS */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ mx_lwip_H */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
--
2.37.2
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