<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jan 29, 2021, 5:52 AM Robin Müller <<a href="mailto:robin.mueller.m@gmail.com">robin.mueller.m@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div>Hi,<br><br></div>I am actually configuring the MPU with the following function, which was taken over from the STM32 example project:<br><br>/*Configure the MPU attributes */<br>void MPU_Config(void)<br>{<br> MPU_Region_InitTypeDef MPU_InitStruct;<br><br> /* Disable the MPU */<br> HAL_MPU_Disable();<br><br> /* Configure the MPU attributes as Device not cacheable<br> for ETH DMA descriptors */<br> MPU_InitStruct.Enable = MPU_REGION_ENABLE;<br> MPU_InitStruct.BaseAddress = 0x30040000;<br> MPU_InitStruct.Size = MPU_REGION_SIZE_256B;<br> MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;<br> MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;<br> MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;<br> MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;<br> MPU_InitStruct.Number = MPU_REGION_NUMBER0;<br> MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;<br> MPU_InitStruct.SubRegionDisable = 0x00;<br> MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;<br><br> HAL_MPU_ConfigRegion(&MPU_InitStruct);<br><br> /* Configure the MPU attributes as Cacheable write through<br> for LwIP RAM heap which contains the Tx buffers */<br> MPU_InitStruct.Enable = MPU_REGION_ENABLE;<br> MPU_InitStruct.BaseAddress = 0x30044000;<br> MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;<br> MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;<br> MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;<br> MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;<br> MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;<br> MPU_InitStruct.Number = MPU_REGION_NUMBER1;<br> MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;<br> MPU_InitStruct.SubRegionDisable = 0x00;<br> MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;<br><br> HAL_MPU_ConfigRegion(&MPU_InitStruct);<br><br> /* Enable the MPU */<br> HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);<br>}<br><br></div><div>If I read the function correctly, it configures the descriptor areas as non-cacheable and the LwIP heap region<br></div><div>as non bufferable. I call this in hardware_init, which is the first function called in my Init funnction<br></div><br>void hardware_init() {<br> BSP_LED_Init(LED1);<br> BSP_LED_Init(LED2);<br> BSP_LED_Init(LED3);<br><br> MPU_Config();<br><br> /* Initialize the LwIP stack */<br> lwip_init();<br><br> /* Configure the Network interface */<br> Netif_Config();<br><br>}<br><br></div>I checked everything again and basically the setup appears to be identical to the example now.. I'm confused that it's not working.<br></div><div>I also supplied the following interrupt function in my C code:<br><br>/**<br> * @brief This function handles Ethernet interrupt request.<br> * @param None<br> * @retval None<br> */<br>void ETH_IRQHandler(void)<br>{<br> HAL_ETH_IRQHandler(&EthHandle);<br>}<br><br></div><div>But it appears not to be called..<br></div></div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Is the irq being registered via the RTEMS interrupt APIs? If not and you are getting an interrupt, I'd wonder why you aren't seeing a spurious interrupt flagged.</div><div dir="auto"><br></div><div dir="auto">It shouldn't be installed directly at the hardware level.</div><div dir="auto"><br></div><div dir="auto">--joel</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div></div><div><br></div>Kind Regards<br></div>Robin<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 29 Jan 2021 at 12:03, Sebastian Huber <<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank" rel="noreferrer">sebastian.huber@embedded-brains.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 29/01/2021 12:01, Robin Müller wrote:<br>
<br>
> The HAL_ETH_Transmit call just times out. If I set the timeout to 20 <br>
> to HAL_MAX_DELAY, the function will just block indefinitely.<br>
> Does anyone have an idea why this might happen?<br>
I would check the memory settings in the MPU for this area. You probably <br>
need some sort of device memory (uncached).<br>
<br>
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