Interupt trouble stm32

Development Boards MicroMod
1

Hello,

I have bought the olimex stm32 development board. I am trying to use this with the tools included and the standard library from ST.

Now I am trying to use a output compare interupt on timer 2. The problem is that the functions in the file stm32f10x_it.c are not used.

When I define manually the vectors I can get the timer 2 interrupt but this is not developer friendly. So my question is how do I use the stm32f10x_it.c functions?

The code that is currently working:

#include "stm32f10x.h"

//Declarations
void nmi_handler(void);
void hardfault_handler(void);
int main(void);
void myDelay(unsigned long delay );
void Clk_Init (void);
void GPIO_Configuration(void);
void Init_USART2(void);
void NVIC_Configuration(void);
void unimplemented_handlertrap(void);
void TIM2_handler(void);

unsigned int * myvectors[76]
  __attribute__ ((section("vectors")))= {
	(unsigned int *)	0x20000800,	// stack pointer
	(unsigned int *) 	main,		// code entry point
	(unsigned int *)	nmi_handler,		// NMI handler
	(unsigned int *)	hardfault_handler,	// hard fault handler
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	unimplemented_handlertrap, //unimplemented placeholder
	(unsigned int *)	TIM2_handler
};

// VARIABLES

TIM_TimeBaseInitTypeDef  	TIM_TimeBaseStructure;
TIM_OCInitTypeDef  			TIM_OCInitStructure;
uint16_t capture = 0;

// MAIN
int main(void)
{
	// Init clock system
	Clk_Init();

	NVIC_Configuration();
	GPIO_Configuration();

	TIM_TimeBaseStructure.TIM_Period 		= 65535;
	TIM_TimeBaseStructure.TIM_Prescaler 	= 0;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0;
	TIM_TimeBaseStructure.TIM_CounterMode 	= TIM_CounterMode_Up;

	TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

	TIM_PrescalerConfig(TIM2, 4, TIM_PSCReloadMode_Immediate);

	TIM_OCInitStructure.TIM_OCMode 		= TIM_OCMode_Timing;
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse 		= 65535;
	TIM_OCInitStructure.TIM_OCPolarity 	= TIM_OCPolarity_High;

	TIM_OC1Init(TIM2, &TIM_OCInitStructure);

	TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);

	TIM_ITConfig(TIM2, TIM_IT_CC1, ENABLE);
	TIM_Cmd(TIM2, ENABLE);

	GPIOB->BSRR |= GPIO_Pin_5; 	//Green led off
	while(1)
	{
    	if(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) != Bit_RESET)
    	{
    		GPIOC->BRR |= GPIO_Pin_12;
    		myDelay(500000);

    	}else{
    		GPIOC->BRR |= GPIO_Pin_12;
    		myDelay(500000);
    		GPIOC->BSRR |= GPIO_Pin_12;
    		myDelay(500000);
    	}
	}
}

void nmi_handler(void)
{
	GPIOB->BRR |= GPIO_Pin_5; 	//Green led
	return ;
}

void hardfault_handler(void)
{
	GPIOB->BRR |= GPIO_Pin_5; 	//Green led
	return ;
}
//Functions definitions
void myDelay(unsigned long delay )
{
  while(delay) delay--;
}

void Clk_Init (void)
{
	SystemInit();

	/* PCLK1 = HCLK/4 */
	RCC_PCLK1Config(RCC_HCLK_Div16);

	/* TIM2 clock enable */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}

void GPIO_Configuration(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;

	// Configure PC.12 as output push-pull (LED)
	GPIO_WriteBit(GPIOC,GPIO_Pin_12,Bit_SET);
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_12;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOC, &GPIO_InitStructure);

	// Configure PB.00, PB.01, PB.05 as output push-pull (LED)
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_5;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);

	// Configure PA.0 as input button (WAKE_UP)
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);

	// Configure USART2 Rx (PA.3) as input floating
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	// Configure USART2 Tx (PA.2) as alternate function push-pull
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void NVIC_Configuration(void)
{
	NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);

	NVIC_InitTypeDef NVIC_InitStructure;

	/* Enable the TIM2 gloabal Interrupt */
	NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

	NVIC_Init(&NVIC_InitStructure);
}
void unimplemented_handlertrap(void)
{
	GPIOB->BRR |= GPIO_Pin_5; 	//Green led
}

void TIM2_handler(void)
{
	  if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
	  {
	    TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);

	    if(GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_0))
	    {
	    	GPIOB->BRR |= GPIO_Pin_0;
			GPIOB->BSRR |= GPIO_Pin_1;
	    }
	    else
	    {
	    	GPIOB->BSRR |= GPIO_Pin_0;
			GPIOB->BRR |= GPIO_Pin_1;
	    }
	  }
}

[/code]

2

Have a look in STM32F10x_Startup.s, that is where the interupt vectors are normally defined. Make sure the name of your function is the same as what’s listed there. In mine it’s called TIM2_IRQHandler.

I just had much the same problem getting the systick working. My function name was missing an underscore so it was never getting called.