timer_example_debug.c

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#include "timer.h"
#include "../usart/usart.h"
#include "../debug/print_funcs.h"
#include "../pio/pio.h"

#define CPU_HZ 20000000

/* Useful pin behaviour definitions
    Used for compare trigger actions */

#define NOOP    0
#define SET     1
#define CLEAR   2
#define TOGGLE  3

/* Generic definitions */
#define TRUE    1
#define FALSE   0

void timer_delay( void );

int main( int argc, char * argv[] )
{

  struct timer_waveform_opt_t waveform_opt;
  struct usart_options_t usart_opt;
  
  avr32_pio_t *piob = (void *) AVR32_PIOB_ADDRESS;
  avr32_usart_t *usart = (void *) AVR32_USART1_ADDRESS;
  
  avr32_piomap_t usart_piomap = {                          \
    {AVR32_USART1_RXD_0_PIN, AVR32_USART1_RXD_0_FUNCTION},  \
    {AVR32_USART1_TXD_0_PIN, AVR32_USART1_TXD_0_FUNCTION}   \
  };
  
  /* The channel number and instance is used in several functions */
  /* It's defined as local variable for ease-of-use causes */
  int channel = 1;
  int timer_instance = 1;
  
  /* Enable Timer module on PIOB */
  piob->pdr = 0x0003ffff;
  piob->asr = 0x0003ffff;
  
  /* Options for Waveform genration */
  waveform_opt.channel = channel;
  waveform_opt.tcclks = TIMER_CLOCK_SOURCE_TC5;
  waveform_opt.clki = FALSE;
  waveform_opt.burst = FALSE;
  
  waveform_opt.cpcstop = FALSE;
  waveform_opt.cpcdis = FALSE;
  waveform_opt.eevtedg = FALSE;
  waveform_opt.eevt = 0;
  waveform_opt.enetrg = FALSE;
  waveform_opt.wavsel = TIMER_WAVEFORM_SEL_UPDOWN_MODE;
  
  waveform_opt.acpa = SET;
  waveform_opt.acpc = CLEAR;
  waveform_opt.aeevt = NOOP;
  waveform_opt.aswtrg = NOOP;
  
  waveform_opt.bcpb = NOOP;
  waveform_opt.bcpc = NOOP;
  waveform_opt.beevt = NOOP;
  waveform_opt.bswtrg = NOOP;
  
  /* Options for USART debugging */
  usart_opt.baudrate = 115200;
  usart_opt.charlength = 8;
  usart_opt.paritytype = USART_NO_PARITY;
  usart_opt.stopbits = USART_1_STOPBIT;
  usart_opt.channelmode = USART_NORMAL_CHMODE;
  
  /* Initialize it in RS232 mode */
  pio_enable_module(usart_piomap, 2);
  usart_init_rs232(usart, &usart_opt, CPU_HZ);
 
 print(usart, "Timer / Counter test...\n");

  /* Init the Timer */
  timer_init_waveform(timer_instance, &waveform_opt);
  timer_write_ra(timer_instance, channel, 0x0055 );
  timer_write_rb(timer_instance, channel, 0x00aa );
  timer_write_rc(timer_instance, channel, 0x00ff );
  timer_start(timer_instance, channel);
  
  while(1){
    printf("TC: 0x%x \n", timer_read_tc(timer_instance,channel) );
    timer_delay();
  }
  return 0;
}

void timer_delay( void )
{
  unsigned long i;
  
  for(i=0; i<CPU_HZ/8; i++);
}

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