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#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "gpio.h"
#include "fb.h"
#define SDPATH "/run/media/mmcblk0p1"
#define LOWBATTERY_L "/home/root/SplashScreen/epdc_lowbatL.pgm"
#define LOWBATTERY_R "/home/root/SplashScreen/epdc_lowbatR.pgm"
static int fifo[2];
void halt(void)
{
fflush(NULL);
sync();
char *halt[] = { "shutdown", "-h", "now", NULL };
execvp(halt[0], halt);
}
void poweroff(int reason)
{
static int halting = 0;
if (halting) {
return;
}
halting = 1;
printf("shutting down (%d)\n", reason);
if (reason == GPIO_LOWBATTERY) {
fb_loadimage(RIGHT_SCREEN, LOWBATTERY_R);
fb_loadimage(LEFT_SCREEN, LOWBATTERY_L);
}
exit(0);
}
void buttonpress(int button)
{
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_lock(&mutex);
write(fifo[1], &button, sizeof(button));
pthread_mutex_unlock(&mutex);
}
int main(int argc, char *argv[])
{
printf("starting freeonebook\n");
(void)argc; (void)argv;
printf("registering atexit() handler\n");
atexit(halt);
pipe(fifo);
printf("adding watchers\n");
gpio_watch(GPIO_LOWBATTERY, poweroff);
gpio_watch(GPIO_SHUTDOWN, poweroff);
gpio_watch(BUTTON_SPECIAL, buttonpress);
gpio_watch(BUTTON_PREVBOOK, buttonpress);
gpio_watch(BUTTON_PREVPAGE, buttonpress);
gpio_watch(BUTTON_NEXTPAGE, buttonpress);
gpio_watch(BUTTON_NEXTCHAPTER, buttonpress);
gpio_watch(BUTTON_NEXTBOOK, buttonpress);
printf("initializing framebuffer\n");
fb_init();
system("ls -lA "SDPATH"/grid.png");
//fb_loadimage(RIGHT_SCREEN, SDPATH "/image.gray");
fb_loadimage(RIGHT_SCREEN, SDPATH "/grid.png");
//fb_loadimage(RIGHT_SCREEN, SDPATH "/right.gray");
//fb_loadimage(LEFT_SCREEN, SDPATH "/left.gray");
for (;;) {
int button = 0;
read(fifo[0], &button, sizeof(button));
switch (button) {
case BUTTON_SPECIAL:
printf("special\n");
break;
case BUTTON_NEXTCHAPTER:
printf("next chapter\n");
break;
case BUTTON_PREVBOOK:
printf("previous book\n");
break;
case BUTTON_NEXTBOOK:
printf("next book\n");
break;
case BUTTON_PREVPAGE:
printf("previous page\n");
break;
case BUTTON_NEXTPAGE:
printf("next page\n");
break;
default:
printf("button %d pressed\n", button);
}
fflush(NULL);
sync();
}
return 0;
}
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