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48 lines
844 B
C
48 lines
844 B
C
#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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int main (int argc, char *argv[]){
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int fd;
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// export
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fd = open("/sys/class/gpio/chip0/export", O_WRONLY);
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write(fd,"17", 2);
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close(fd);
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//pin direction
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fd = open("/sys/class/gpio/chip0/gpio17/direction", O_WRONLY);
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write(fd,"out", 3);
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close(fd);
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//pin value
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fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
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write(fd,"1", 1);
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close(fd);
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sleep(1);
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fd = open("/sys/class/gpio/chip0/gpio17/value", O_WRONLY);
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write(fd,"0", 1);
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close(fd);
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sleep(1);
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//unexport
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fd = open("/sys/class/gpio/chip0/unexport", O_WRONLY);
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write(fd,"17", 2);
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close(fd);
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printf("Hello from Raspberry Pi!\n");
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printf("Number of arguments: %d\n",argc);
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printf("Program is reciving: %s\n",argv[0]);
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if (argc > 1)
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printf("Argument: %s\n", argv[1]);
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return 0;
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}
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