HCS08 Timer problem

Hi There

I'm new with programming a microcontroller, so sorry for some questions. I have a HCS08 SofTec starterkit.

I want to control the light intensity of a external LED with a PWM. Therefor, I want to control the Duty Cycle of the PWM with the potentiometer on my starterkit. The ATD conversion is working. But my timer is not working and I have no idea why. To confirm that the timer is working, I set an interrupt. When the Timer has reached the channel value, port F on my starterkit should be increment (On port F are eight LEDs). But as I said, it dosen't work.

Can you help me?

Here's my code:

#include /* for EnableInterrupts macro */ #include "derivative.h" /* include peripheral declarations */ #include

#define Input 0x00 #define Output 0xFF

int low = 0; //low-value from ADC int high = 0; //high-value from ADC

void interrupt ISR_Timer(void) { PTFD++; //verification, that the flag is set TPM1C0SC = TPM1C0SC; //clear channel 0 interrupt falg TPM1C0SC_CH0F = 0; }

void InitPorts(void) { SOPT_COPE = 0; //disable Watchdog PTBDD = Input; PTDDD = Output; PTFDD = Output; }

void InitAD (void) { ATD1C_ATDPU = 1; /* power on */ ATD1C_RES8 = 0; /* 10-bit Resolution */ ATD1SC_ATDCO = 1; /* continuous mode */ ATD1PE_ATDPE0 = 1; /* enable bit 1 */ ATD1SC_ATDCH = 0; /* select channel 1 */ }

void InitTimer(void)

{ //Timer 1 Control & Status Register TPM1SC_TOIE = 0; //Timer 1 Overflow Interrupt disable TPM1SC_CPWMS = 1; //Center aligned mode TPM1SC_CLKSA = 1; //Internal Clock source TPM1SC_CLKSB = 0; TPM1SC_PS0 = 1; //Prescaler = 128 TPM1SC_PS1 = 1; //Prescaler = 128 TPM1SC_PS2 = 1; //Prescaler = 128 //Timer 1 Modulo Register TPM1MODH = 0xF4; TPM1MODL = 0x24; //Timer 1 Channel 0 Control Register TPM1C0SC_CH0IE = 1; //Channel 0 Overflow Interrupt enable TPM1C0SC_MS0B = 1; //PWM mode TPM1C0SC_ELS0A = 1; //Edge aligned mode }

void main (void) { InitPorts(); InitAD(); InitTimer(); for (;;) { if(ATD1SC_CCF == 1) { TPM1C0VL = ATD1RL; TPM1C0VH = ATD1RH; high = ATD1RH; low = ATD1RL; } } }

Allocation in *.prm file:

VECTOR 8 ISR_Timer

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