50 lines
909 B
C
50 lines
909 B
C
/*GPIO.c*/
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#include<stdio.h>
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#include<fcntl.h>
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#include<string.h>
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#include<unistd.h>
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#include<string.h>
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#include "gpio.h"
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void writeFile(char *filename, char *buffer, size_t count)
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{
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int fd = open(filename, O_WRONLY);
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if(fd == -1) {
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perror("Fehler bei open ");
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}
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write(fd, buffer, count);
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close(fd);
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}
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void registerPin(char *pin)
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{
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writeFile(BASEPATH "export", pin, strlen(pin));
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}
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void freePin(char *pin)
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{
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writeFile(BASEPATH "unexport", pin, strlen(pin));
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}
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void setDirection(char *pin, char *direction, int dirlen)
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{
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char path[50];
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sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
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writeFile(path, direction, dirlen);
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}
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void registerOutput(char *pin)
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{
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registerPin(pin);
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setDirection(pin, "out", 3);
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}
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void writeOutput(char *pin, int state)
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{
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char path[50];
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sprintf(path, BASEPATH GPIO_FOLDER "value", pin);
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FILE *fd = fopen(path, "w");
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fprintf(fd, "%i", state);
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fclose(fd);
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} |