STM8L的外部中断死循环问题

只看该作者 · 2014-7-7 10:24

我想起用外部中断0和外部中断6。经过我的设置，程序总是在外部中断6的服务程序里运行。PC6的电平一直是低电平。下面是我的设置：
I/O口设置：
void CC113L_SPI_GPIOInit(void)
{
  GPIO_Init(GPIOD, GPIO_Pin_0, GPIO_Mode_In_FL_IT);          //GDO0    外部中断0
  GPIO_Init(GPIOB, GPIO_Pin_5, GPIO_Mode_Out_PP_Low_Slow);       //SCK
  GPIO_Init(GPIOA, GPIO_Pin_3, GPIO_Mode_Out_PP_Low_Slow);       //MOSI
  GPIO_Init(GPIOA, GPIO_Pin_2, GPIO_Mode_In_PU_No_IT);          //MISO
  GPIO_Init(GPIOC, GPIO_Pin_4, GPIO_Mode_Out_PP_Low_Slow);       //CSN
GPIO_Init(GPIOC, GPIO_Pin_5, GPIO_Mode_In_FL_No_IT);
}

void USART_GpioInit(void)
{
GPIO_Init(GPIOC, GPIO_Pin_6, GPIO_Mode_In_FL_IT);       //外部中断6
      GPIO_Init(GPIOC, GPIO_Pin_0, GPIO_Mode_Out_PP_High_Slow);    //PC0
}
void EXIT_Init(void)
{
EXTI_DeInit();
      EXTI_SetPinSensitivity(GPIO_Pin_0,EXTI_Trigger_Rising);
EXTI_SetPinSensitivity(GPIO_Pin_6,EXTI_Trigger_Falling);
ITC_SetSoftwarePriority(EXTI6_IRQn,ITC_PriorityLevel_3);
ITC_SetSoftwarePriority(EXTI0_IRQn,ITC_PriorityLevel_2);
EXTI_ClearITPendingBit(EXTI_IT_Pin6);
EXTI_ClearITPendingBit(EXTI_IT_Pin0);
enableInterrupts();
}

下面是Vector.c里的设置：
#include "stm8l15x_it.h"
typedef void @far (*interrupt_handler_t)(void);

struct interrupt_vector {
unsigned char interrupt_instruction;
interrupt_handler_t interrupt_handler;
};

@far @interrupt void NonHandledInterrupt (void)
{
/* in order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction
*/
return;
}

extern void _stext();    /* startup routine */
extern void EXTI0_IRQHandler(void);
extern void EXTI6_IRQHandler(void);

struct interrupt_vector const _vectab[] = {
{0x82, (interrupt_handler_t)_stext}, /* reset */
{0x82, NonHandledInterrupt}, /* trap  */
{0x82, NonHandledInterrupt}, /* irq0  */
{0x82, NonHandledInterrupt}, /* irq1  */
{0x82, NonHandledInterrupt}, /* irq2  */
{0x82, NonHandledInterrupt}, /* irq3  */
{0x82, NonHandledInterrupt}, /* irq4  */
{0x82, NonHandledInterrupt}, /* irq5  */
{0x82, NonHandledInterrupt}, /* irq6  */
{0x82, NonHandledInterrupt}, /* irq7  */
{0x82, EXTI0_IRQHandler}, /* irq8  */
{0x82, NonHandledInterrupt}, /* irq9  */
{0x82, NonHandledInterrupt}, /* irq10 */
{0x82, NonHandledInterrupt}, /* irq11 */
{0x82, NonHandledInterrupt}, /* irq12 */
{0x82, NonHandledInterrupt}, /* irq13 */
{0x82, EXTI6_IRQHandler}, /* irq14 */
{0x82, NonHandledInterrupt}, /* irq15 */
{0x82, NonHandledInterrupt}, /* irq16 */
{0x82, NonHandledInterrupt}, /* irq17 */
{0x82, NonHandledInterrupt}, /* irq18 */
{0x82, NonHandledInterrupt}, /* irq19 */
{0x82, NonHandledInterrupt}, /* irq20 */
{0x82, NonHandledInterrupt}, /* irq21 */
{0x82, NonHandledInterrupt}, /* irq22 */
{0x82, NonHandledInterrupt}, /* irq23 */
{0x82, NonHandledInterrupt}, /* irq24 */
{0x82, NonHandledInterrupt}, /* irq25 */
{0x82, NonHandledInterrupt}, /* irq26 */
{0x82, NonHandledInterrupt}, /* irq27 */
{0x82, NonHandledInterrupt}, /* irq28 */
{0x82, NonHandledInterrupt}, /* irq29 */
};

外部中断6的服务程序：
@far @interrupt void EXTI6_IRQHandler(void)
{
/* In order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction.
*/
EXTI_ClearITPendingBit(EXTI_IT_Pin6);
time_ok = 1;
sleep_ok = 1;

}

STM8L的外部中断死循环问题

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