int main()
{
struct sigaction sa;
pthread_t thread;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = sigintHandler;
if (sigaction(SIGINT, &sa, NULL) == -1)
{
printf("MAIN: reserving sigaction failed!\n");
return -1;
}
GPIO_export(SWITCH);
GPIO_export(LED);
GPIO_direction(SWITCH_DIRECTION_PATH,"in");
GPIO_direction(LED_DIRECTION_PATH,"out");
GPIO_write(LED_PATH, LED_OFF);
if(pthread_create(&thread, NULL , blink5Hz , NULL))
{
printf("MAIN: error: Thread-creation failed!\n");
return -1;
}
struct timespec request;
request.tv_nsec = 50000000;
request.tv_sec = request.tv_nsec / 1000000000;
printf("Push the Button ..");fflush(stdout);
while(!SHUTDOWN)
{
while(strcmp(GPIO_read(SWITCH_PATH),LOW) != 0)
clock_nanosleep(CLOCK_REALTIME, SLEEP_FLAG, &request, NULL);
while(strcmp(GPIO_read(SWITCH_PATH),HIGH) != 0)
clock_nanosleep(CLOCK_REALTIME, SLEEP_FLAG, &request, NULL);
count++;
}
}
int GPIO_open()
{
if (g_init == 1) {
fprintf(stderr,
"GPIO_open: I/O expander is already initialised.\n");
return 0;
}
g_init = 1;
fd = open(I2C_BUS, O_RDWR);
if (fd == -1) {
fprintf(stderr, "GPIO_open error: %s\n", strerror(errno));
return -1;
}
if (ioctl(fd, I2C_SLAVE, I2C_ADDR) == -1) {
fprintf(stderr, "GPIO_open: ioctl error: %s\n", strerror(errno));
return -1;
}
/* Configure IO expander */
int r = 0;
r += GPIO_direction(PortA, PORTA_IODIR);
r += GPIO_direction(PortB, PORTB_IODIR);
r += exp_write(PortA, IOPOL, PORTA_IOPOL);
r += exp_write(PortB, IOPOL, PORTB_IOPOL);
r += exp_write(PortA, GPPU, PORTA_GPPU);
r += exp_write(PortB, GPPU, PORTB_GPPU);
/* Configure the GPIO pins */
GPIOA_buf.reg = GPIOA_INIT;
GPIOB_buf.reg = GPIOB_INIT;
r += GPIO_write(PortA);
r += GPIO_write(PortB);
if (r == 0) {
return r;
}
g_init = 0;
fprintf(stderr, "GPIO_open: initialisation Error: %d\n", r);
return r;
}
