int main(void) {
int number_presses = 0;
/* Initialize all of the LEDs */
ledInitAll();
/* Initialize both of the pushbuttons */
pushbuttonInitAll();
/* initially orange LED should be on and all others should be off */
ledOrangeOn();
while(1) {
if (sw1In()) {
/* avoid contact bounce */
delay(DELAY_LIMIT);
number_presses++;
if (number_presses == 4) {
number_presses = 0;
}
if (number_presses == 0) {
ledOrangeOn();
} else {
ledOrangeOff();
}
if (number_presses == 1) {
ledYellowOn();
} else {
ledYellowOff();
}
if (number_presses == 2) {
ledGreenOn();
} else {
ledGreenOff();
}
if (number_presses == 3) {
ledBlueOn();
} else {
ledBlueOff();
}
/* wait until button released before checking if pushed again */
while(sw1In()) { ; }
}
}
return 0;
}
int fgetc_button(Stream *stream) {
if (stream->device_instance == BUTTON_SW1) {
if (sw1In()) {
/* wait until button released before checking if pushed again */
while(sw1In()) { ; }
return 1;
}
return 0;
}
if (stream->device_instance == BUTTON_SW2) {
if (sw2In()) {
/* wait until button released before checking if pushed again */
while(sw2In()) { ; }
return 1;
}
return 0;
}
return INVALID_BUTTON;
}
/*
* increment counter value in circular manner, call changestate()
* which turns on one LED and turns off others depending upon
* counter value.
*/
void rotate()
{
const unsigned long int delayCount = 0x7ffff;
int counter = 0;
changestate(counter);
while(1)
{
if(sw1In())
{
counter = ((counter + 1) % 4);//move to next led
changestate(counter);
delay(delayCount);//wait for switch to be depressed
}
}
}
/*
* Implements read interface.
* Parameters:
* o void *fp - stream to read.
* o char* buff - character read into buff.
* Return : Number of bytes read
*/
int btn_read(void *fp,char* buff)
{
struct btn_stream* stream = (struct btn_stream*)fp;
int result = 0;
switch(stream->minor)
{
case ONE:
result = sw1In();
break;
case TWO:
result = sw2In();
break;
default:
return 0;
}
*buff = (result > 0) ? '1' : '0';
return 1;
}
static int cmd_therm2ser(int argc, char *argv[])
{
if(argc > 1)
{
my_errno = TOO_MANY_ARGUMENTS;
return 1;
}
int rfd = svc_open("/ttr",'r');
if(rfd > 0)
{
char buff;int val;
val = svc_read(rfd,&buff);
while(!sw1In())
{
char temp[8];
sprintf(temp,"%d\r\n",val);
uprintf(temp);
val = svc_read(rfd,&buff);
}
svc_close(rfd);
return 0;
}
return 1;
}
