PWM disables the uart.

[KenG]

When I enable the PWM the Uart quits receiving.

I can't see anything obvious in the list file. Is this a hardware problem?
Any help is appreciated!


// PWM Test
// When PWM is enabled the Uart quits receiving.

#include <33EP64MC202.h>

#FUSES FRC_PLL //Internal Fast RC oscillator with PLL
#FUSES CKSFSM //Clock Switching is enabled, fail Safe clock monitor is enabled
#FUSES NOJTAG //JTAG disabled

#FUSES NOPWMLOCK
#fuses OSCIO

#use delay(clock=80Mhz,Internal=7.37Mhz)

void main(){
char x;

// Set the serial port pins
#pin_select U1TX=PIN_B10
#pin_select U1RX=PIN_B11

// PWM module enable
#bit PTEN = getenv("BIT:PTEN")

// Primary Master Time Base Period Register
#word PTPER= getenv("SFR:PTPER")

// Master dutycycle
#word MDC= getenv("SFR:MDC")

// Master Duty Cycle Register Select
#bit MDCS = getenv("BIT:MDCS")

PTPER = 8000; // 10kHz period
MDC = 4000; // 50% duty cycle
MDCS = 1;

#use rs232(baud=115200,UART1, XMIT=PIN_B10, RCV=PIN_B11, BITS=8, parity=N, errors)

printf("Press any key except 1 to see the uart working.\r\n");
printf("Pressing the 1 key enables PWM1 but kills the uart receive somehow.\r\n");

while(1) {
if(kbhit()){
x = getc();

switch(x){

case '0':
// PTEN off
PTEN = 0;
printf("PTEN = %d\r\n",PTEN);

break;

case '1':
// PTEN on
PTEN = 1;
printf("PTEN = %d\r\n",PTEN);

break;

default:
printf("You pressed %c. \r\n",x);
break;

}


}
}
}

[KenG]

CCS had to school me on the obvious(hindsight). When using this module be sure to disable any PWMxH,L pins you do not want as PWM by clearing the enable bits in IOCONx. These pins are enabled by default.