hello all,
I have a code whic i think everything is ok but while compiling it gives many errors…can any one help me to debug it. I have this for measurinf pulse width of PPM signal received by 8 channel receiver.
# define PPM_Number_of_Channels 8
int failSafePulses = 0;
int PPM_IN[input+1]; // Pulse Width of input signal
unsigned int rise[input+1] ; //rising edge clock
unsigned char ch; //PPM channel counter
unsigned int fall; // Record PPM fall time
Boolean framok; // Are all measurement ok
#define PPM_FAILSAFE_INPUT_MIN 1500
#define PPM_ADJUST 1000
void capture_int(void)
{
T2CON = 0b1000000000000000 ; // turn on timer 2 with no prescaler
TRISD = 0b1111111111111111 ; // make the d port input, to enable IC1 and IC2
TRISFbits.TRISF6 = 1 ; // make F6 an input to enable the 3rd switch
IC1CON = IC2CON = IC7CON = IC8CON = 0b0010000010000001 ; //IMC<2:0> = 001 (Capture every rising and falling edge)
IPC0bits.IC1IP = IPC1bits.IC2IP = IPC4bits.IC7IP = IPC4bits.IC8IP = 6 ; // priority 6
IFS0bits.IC1IF = IFS0bits.IC2IF = IFS1bits.IC7IF = IFS1bits.IC8IF = 0 ; // clear the interrupt
IEC1bits.IC7IE = 1 ; // turn on interrupt for input 1
return ;
}
void __attribute__((__interrupt__,__no_auto_psv__)) _IC7Interrupt(void)
{
unsigned int time ;
unsigned int pulse;
IFS1bits.IC7IF = 0 ; // clear the interrupt
while ( IC7CONbits.ICBNE )
{
time = IC7BUF ;
}
#if ( NORADIO == 0 )
if (!PORTBbits.RB4) //first change!
{
fall = time ;
}
else
{
pulse = ((time – fall ) >> 1 )+ PPM_ADJUST ;
if (pulse > 10000) //sync pulse
{
ch = 1;
frameOK = true;
}
else
{
PPM_IN[ch] = pulse;
if (ch < PPM_NUMBER_OF_CHANNELS + 1 )
ch++; //scan next channel
else
{
if(frameOK == false)
{
failSafePulses = 0 ;
flags._.radio_on = 0 ;
LED_GREEN = LED_OFF ;
}
if( (PPM_IN[FAILSAFE_INPUT_CHANNEL] > FAILSAFE_INPUT_MIN) && (PPM_IN[FAILSAFE_INPUT_CHANNEL] < FAILSAFE_INPUT_MAX ) )
failSafePulses++ ;
ch = 1;
frameOK = true;
}
if ( (pulse < PPM_FAILSAFE_INPUT_MIN ) )
{
frameOK = false;
}
}
}
#endif
}
thank you
Rahul