ready to test GPIO code
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								src/Makefile
									
									
									
									
									
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								src/Makefile
									
									
									
									
									
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OBJS=main.o log.o gpio.o
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LIBS=
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upiwin: $(OBJS)
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	gcc -o upiwin $(OBJS) $(LIBS)
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.c.o:
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	gcc -c $(CFLAGS) $<
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@ -3,6 +3,7 @@
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#include <fcntl.h>
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#include <sys/mman.h>
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#include "log.h"
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#include "gpio.h"
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#define GLINE_BUTTON1  17
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#define GLINE_BUTTON2  22
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								src/gpio.h
									
									
									
									
									
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								src/gpio.h
									
									
									
									
									
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#ifndef __GPIO_H_INCLUDED
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#define __GPIO_H_INCLUDED
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extern int Gpio_setup(void);
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extern void Gpio_cleanup(void);
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extern int Gpio_poll_buttons(void);
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#endif /* __GPIO_H_INCLUDED */
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								src/main.c
									
									
									
									
									
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								src/main.c
									
									
									
									
									
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#include <stdlib.h>
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#include "gpio.h"
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#include "log.h"
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int main(int argc, char *argv[])
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{
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  if (Gpio_setup() != 0)
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    return EXIT_FAILURE;
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  atexit(Gpio_cleanup);
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  log(LINFO, "System ready.");
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  for (;;) {
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    Gpio_poll_buttons();
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  }
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}
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