我已将我的树莓派 1 的 GPIO 引脚 17(在 WiringPi Pin17 = Pin0 中)与中断源(一个 IR-LED 发射器/接收器连接,当红外线被某些障碍物中断时触发中断)。为了设置 ISR,我一直在使用 WiringPi 库(我已经用 pigpio 库尝试过,但我也有同样的问题)。为了验证我实际上在 Pin17 上接收到中断,我用我的逻辑分析仪检查了它,并且肯定有一些中断发生在这个引脚上,如您所见:
这是我的代码:
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <wiringPi.h>
#include "MCP3008Driver.h"
#include "DHT11.h"
#define INT_PIN 0
volatile int eventCounter = 0;
void myInterrupt(void){
printf("hello ISR!\n");
eventCounter++;
}
volatile sig_atomic_t stopFlag = 0;
static void stopHandler(int sign) { /* can be called asynchronously */
stopFlag = 1; /* set flag */
}
int main(void) {
signal(SIGINT, stopHandler);
signal(SIGTERM, stopHandler);
// sets up the wiringPi library
if (wiringPiSetup () < 0) {
printf("Unable to setup wiring pi\n");
fprintf (stderr, "Unable to setup wiringPi: %s\n", strerror
(errno));
return 1;
}
// set Pin 17/0 to generate an interrupt on high-to-low transitions
// and attach myInterrupt() to the interrupt
if(wiringPiISR(INT_PIN, INT_EDGE_FALLING, &myInterrupt) < 0){
printf("unable to setup ISR\n");
fprintf(stderr, "Unable to setup ISR: %s\n", strerror(errno));
}
DHT11_data data;
configureSPI();
while(1){
if(stopFlag){
printf("\n Ctrl-C signal caught! \n");
printf("Closing application. \n");
return 0;
}
//read_dht_data(&data);
int analogBoiler = readChannel(0);
int analogHeater = readChannel(1);
int analogPress = readChannel(2);
int analogACS712 = readChannel(3);
int analogDynamo = readChannel(4);
printf("Channel 0 / Boiler = %f\n", evaluateChannelValue(ePT100_BOILER, analogBoiler));
printf("Channel 1 / Heater = %f\n", evaluateChannelValue(ePT100_HEATER, analogHeater));
printf("Channel 2 / Pressure = %f\n", evaluateChannelValue(ePRESS, analogPress));
printf("Channel 3 / Power ACS712 = %f\n", evaluateChannelValue(eACS712, analogACS712));
printf("Channel 4 / Power Dynamo = %f\n", evaluateChannelValue(eDYNAMO, analogDynamo));
//printf("Humidity Environment: %f\n", data.humidity);
//printf("Temperature (Celsius) Environment: %f\n", data.temp_celsius);
// display counter value every second.
printf("%d\n", eventCounter);
sleep(5);
}
return 0;
}
方法wiringPiSetup 和wiringPiISR 被成功调用并且没有返回错误。
我正在使用以下链接选项构建此示例:-lwiringPi -lm -lpthread。也许我错过了链接选项?
我一直在这里使用此代码作为参考。那么我在这里做错了什么?谢谢你能给我的任何建议!