He escrito este programa para GPIO External Interrupt pero no funciona. mira el programa:
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
/* Private functions ---------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
void GPIO_Configuration(void);
void EXTI_Configuration(void);
void NVIC_Configuration(void);
/*******************************************************************************
* Function Name : main
* Description : Main Programme
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
int main(void)
{
GPIO_Configuration();
NVIC_Configuration();
EXTI_Configuration();
/* Infinite loop */
while (1)
{
}
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configure GPIO Pin
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void GPIO_Configuration(void)
{
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB , ENABLE);
/**
* LED1 -> PB0
*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* PB2-> Input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void EXTI_Configuration(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource2);
EXTI_ClearITPendingBit(EXTI_Line2);
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_Line = EXTI_Line2;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI0_IRQHandler(void)
{
if ( EXTI_GetITStatus(EXTI_Line2) != RESET ) {
EXTI_ClearITPendingBit(EXTI_Line2);
GPIO_SetBits(GPIOB , GPIO_Pin_0);
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/******************************************************************************************
END FILE
******************************************************************************************/
y este mi circuito:
Incluso he bajado el PB2 pero no funciona, otra vez. el programa se compila y descarga correctamente (sin ningún error o advertencia).
¿Cuál es el problema? alguna idea?