[PATCH] Proposal for new GPIO API and example implementation for STM32F4 BSP

[Karel Gardas]

Hello Duc,

just one remark.

On 6/27/22 05:34, Duc Doan wrote:

> rtems_gpio_ctrl_t *ctrl0 = bsp_gpio_get_ctrl(60); //corresponds to
> GPIOD pin 12 on F4

^ if your ctrl structure knows you are working with pin 60

> rtems_gpio_write(ctrl, 60, RTEMS_GPIO_PIN_SET);

then you do not need to use it for write.

In fact I guess ctrl structure would contain some BSP specific data and 
since bsp_gpio_get_ctrl is BSP specific function for f4 that means in 
ctrl you will save your GPIOx and pin number -- e.g. hardware specific 
pin representation.

This means on write/read you do not need to map virtual pin -> physical 
pin again, but in fact use physical pin from ctrl and be as fast as 
possible.

Christian described everything else already so no need to add anything here.

I'm glad you are making this steady progress on this project.

Thanks,
Karel