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daniel 2 years ago
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      main.c

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main.c View File

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//This project turns on, off or toggle an LED
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<time.h>
#define LED3_PATH "/sys/class/leds/beaglebone:green:usr3"
#define bled "/brightness"
#define tled "/trigger"
#define en "/delay_on"
#define ap "/delay_off"
//Protypes:
void writeLED(char fileName[], char value[]);
void removeTrigger();
//main:
////////////////////////////////////////////////////////
int main(int argc, char* argv[]){
printf("Starting app\n");
//writeLED(bled, "1");
//printf("Done");
//return 0;
//strcmp(argv[1], "on")==0;
//
if(strcmp(argv[1],"on")==0){
printf("encendiendo LED\n");
removeTrigger();
writeLED(bled,"1");
}
else if(strcmp(argv[1], "off")==0){
printf("apagando LED\n");
removeTrigger();
writeLED(bled,"0");
}
else if(strcmp(argv[1],"blink")==0){
printf("blink\n");
writeLED(tled,"timer");
writeLED("en","50");
writeLED("ap","50");
}
else{
printf("comando invalido");
}
printf("programa finalizado");
return 0;
}
////////////////////////////////////////////////////////
void writeLED(char fileName[], char value[]){
FILE* fp;
char fullName[150];
sprintf(fullName, LED3_PATH "%s", fileName);
fp = fopen(fullName, "w+");
fprintf(fp, "%s", value);
fclose(fp);
}
void removeTrigger(){
writeLED(tled, "none");
}

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