Example for GPIO control using DMA and PWM.

[KKIM.6]

I want to change the DMA memory according to the PWM signal and change the GPIO pin to turn on/off automatically based DMA memory information.

Are there any good examples of this?

[Sarra.S]

Hello @KKIM.6,

Could you provide more details maybe? 

[KKIM.6]

My microcontroller has 48 GPIO pins and I want to turn on and off each GPIO pin when 1 MHz PWM signal. 

Only One GPIO pin should be turned on once and the other GPIO pin should be turned off.

The reason I need to use DMA is that, In the case of HAL code, the on/off function speed of GPIO is around 1 ms not 1 us (1 MHz).

So, I want to assign on/off of GPIO to a DMA and the PWM value change the DMA of GPIO pin.

[MasterT · Accepted solution]

It was in the top-10 search results "GPIO DMA" on this board:

https://community.st.com/t5/stm32-mcus-products/how-to-use-timer-event-dma-from-memory-to-gpio/m-p/102988

https://github.com/mnemocron/STM32_PatternDriver