DMA-trigger via GPIO-pin

de · ‎2009-08-06

Posted on August 06, 2009 at 15:02

de · ‎2011-05-17

Posted on May 17, 2011 at 13:20

Hi,

is it possible to start a DMA transaction by a falling edge on a GPIO pin (STM32F103CB)?

I used the EXTI configuration for this input pin and in the EXTI-ISR i can trigger the DMA.

But i think this is not a really good solution, because of a trigger-signal of 9 - 18 MHz.

So i want to trigger the DMA by the hardware.

Greetings Hirbel