Port I/O

agilmore19 · ‎2010-10-16

Posted on October 16, 2010 at 21:34

Hi, I'm new to the forum and the discovery board. Got it working with the test routines. Is it possible to switch a led, say LED5, connected to PC11, on and off using the routines in STM32_Discovery. If so how do I declare the led port?

Many thanks

Alastair

Tesla DeLorean · ‎2010-10-16

Posted on October 17, 2010 at 04:40

Hi, I'm new to the forum and the discovery board. Got it working with the test routines. Is it possible to switch a led, say LED5, connected to PC11, on and off using the routines in STM32_Discovery. If so how do I declare the led port?

Enumerate additional GPIO's in STM32vldiscovery.c/h, or just program them directly.

void GPIOSetup(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

/* Configure the PC.11 pin */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void GPIOLed(int i)

{

if (i)

GPIOC->BSRR = GPIO_Pin_11; // PC.11 On

else

GPIOC->BRR = GPIO_Pin_11; // PC.11 Off

}

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agilmore19 · ‎2010-10-18

Posted on October 18, 2010 at 10:26

Many thanks, that worked a treat. I'd rather try and make use of the already written functions rather than try to rewrite them myself, particularly since I am on a learning curve.

Alastair