GpIoPin::GpIoPin(uint pinNumber, bool isOut, QObject *parent) : QObject(parent){
_currentValue = 2; // Make it out of range to force write if out pin
_ioFd = -1; // Make it invalid to force initial open
_pinNumber = pinNumber;
exportPin();
setDirection(isOut);
}
void IRQ(int pin) {
char pVal[16];
int timeoutTime = -1; // Never timeout
int fd_pinValue;
exportPin(pin); // Export Pin
pinMode(pin, PIN_INPUT);
setEdge(pin);
memset(pinPath, 0 , sizeof(pinPath));
sprintf(pinPath, "%s/gpio%d/value", GPIO_PATH, pin);
if ((fd_pinValue = open(pinPath, O_RDONLY | O_NONBLOCK)) == -1 ) {
perror("IRQ getting value fd: ");
}
struct pollfd fdset[1];
struct sched_param sched;
memset (&sched, 0, sizeof(sched));
sched.sched_priority = 55; // High Priority
sched_setscheduler (0, SCHED_RR, &sched);
while (1) {
memset((void*)fdset, 0, sizeof(fdset));
fdset[0].fd = fd_pinValue;
fdset[0].events = POLLPRI;
int rc = poll(fdset, 1, timeoutTime); // BLOCK 4EVA~!
if (rc < 0) {
printf("poll(): got a -1... something broke!\n");
}
if (rc == 0) {
printf("poll(): got a timeout... should be -1?\n");
}
if (fdset[0].revents & POLLPRI) {
memset(pVal, 0, 16);
int size = read(fdset[0].fd, pVal, 16);
// go to function pointer
printf("\npoll() GPIO %d interrupt occurred\n", pin);
}
}
close(fd_pinValue);
}
/*
pwm0=Pin49
pwm1=Pin50
pwm2=Pin55
pwm3=Pin58
*/
int main(){
/*
echo ?? > /sys/class/gpio/export
echo (out||in) > /sys/class/gpio/gpio??/direction
echo (1||0) > /sys/class/gpio/gpio??/value
*/
exportPin(57);
pinMode(1,57);
setValue(1,57);
return 0;
}
// runled.o 1000 10 1
void main(int argc, char **argv)
{
int iMicroSecs = 0, iCount = 0, iPattern = 1, i = 0;
//check user inputs
if (argc == 4) //valid inputs form user
{
iMicroSecs = strtol(argv[1], NULL, 10) * 1000;
iCount = strtol(argv[2], NULL, 10);
iPattern = strtol(argv[3], NULL, 10);
} else { //invalid inputs, use default values
printf("\nNo/Invalid Arguments ! Running Default:");
iMicroSecs = 1000000;
iCount = 50;
iPattern = 1;
printf("\nBlink Rate = %d ms\nCount = %d\nPattern = %d\n", iMicroSecs, iCount, iPattern);
}
//Initialise GPIO pins for out operation
//if (0 != setPinMode(P8_32, PIN_MODE_DEFAULT))
// exit(EXIT_FAILURE);
if (0 != exportPin(P8_32))
exit(EXIT_FAILURE);
if (0 != setPinDirection(P8_32, GPIO_DIR_OUT))
exit(EXIT_FAILURE);
//if (0 != setPinMode(P8_33, PIN_MODE_DEFAULT))
// exit(EXIT_FAILURE);
if (0 != exportPin(P8_33))
exit(EXIT_FAILURE);
if (0 != setPinDirection(P8_33, GPIO_DIR_OUT))
exit(EXIT_FAILURE);
//if (0 != setPinMode(P8_38, PIN_MODE_DEFAULT))
// exit(EXIT_FAILURE);
if (0 != exportPin(P8_38))
exit(EXIT_FAILURE);
if (0 != setPinDirection(P8_38, GPIO_DIR_OUT))
exit(EXIT_FAILURE);
//if (0 != setPinMode(P8_39, PIN_MODE_DEFAULT))
// exit(EXIT_FAILURE);
if (0 != exportPin(P8_39))
exit(EXIT_FAILURE);
if (0 != setPinDirection(P8_39, GPIO_DIR_OUT))
exit(EXIT_FAILURE);
switch(iPattern) {
case 1:
{
for (i = 0; i < iCount; i++) {
if (0 != setPinValue(P8_32, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_33, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_38, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_39, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
if (0 != setPinValue(P8_32, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_33, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_38, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_39, GPIO_LOW))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
}
break;
}
case 2:
{
for (i = 0; i < iCount; i++) {
// all led OFF
if (0 != setPinValue(P8_39, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_32, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_33, GPIO_LOW))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_38, GPIO_LOW))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 1 : ON
if (0 != setPinValue(P8_32, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 2 : ON
if (0 != setPinValue(P8_33, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 3 : ON
if (0 != setPinValue(P8_38, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 4 : ON
if (0 != setPinValue(P8_39, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
}
break;
}
case 3:
{
for (i = 0; i < iCount; i++) {
// led 1 : ON
if (0 != setPinValue(P8_32, GPIO_HIGH))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 2 : ON, led 1 : OFF
if (0 != setPinValue(P8_33, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_32, GPIO_LOW))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 3 : ON, led 2 : OFF
if (0 != setPinValue(P8_38, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_33, GPIO_LOW))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
// led 4 : ON, led 3 : OFF
if (0 != setPinValue(P8_39, GPIO_HIGH))
exit(EXIT_FAILURE);
if (0 != setPinValue(P8_38, GPIO_LOW))
exit(EXIT_FAILURE);
usleep(iMicroSecs);
//led 4 : OFF
if (0 != setPinValue(P8_39, GPIO_LOW))
exit(EXIT_FAILURE);
}
break;
}
default:
{
//never reaches here
}
}
}
Input::Input(Pin::List pin) : _pin(pin)
{
exportPin(pin);
setDirection(pin, Direction::IN);
_fd = open(pin, Direction::IN);
}
Output::Output(Pin::List pin) : _pin(pin)
{
exportPin(pin);
setDirection(pin, Direction::OUT);
_fd = open(pin, Direction::OUT);
}
