usart_example1.c

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

#include <sys/interrupts.h>
#include <avr32/intc.h>

/*
Huskeliste for å forandre innstans:
- USART_ADDR må forandres
- PIOMAP må oppdateres
- Riktig IRQ må settes
*/

#define USART_ADDR AVR32_USART2_ADDRESS

/* interrupt handler for usart */
__int_handler *usart_int_handler()
{
  volatile avr32_usart_t * usart = (void *) USART_ADDR;
/*
  print_hex( usart, usart->csr);
  print(usart, "\n\r");
*/
  print_char( usart, usart_getchar(usart) );

  return (void *) 0;
}

int main( void )
{
  int cpu_hz = 20000000;
  struct usart_options_t opt;

  volatile avr32_usart_t *usart = (void *) USART_ADDR;

  avr32_piomap_t usart_piomap = {                               \
    {AVR32_USART2_RXD_0_PIN, AVR32_USART2_RXD_0_FUNCTION},      \
    {AVR32_USART2_TXD_0_PIN, AVR32_USART2_TXD_0_FUNCTION},      \
    {AVR32_USART0_CLK_0_PIN, AVR32_USART0_CLK_0_FUNCTION},      \
    {AVR32_USART0_CTS_0_PIN, AVR32_USART0_CTS_0_FUNCTION},      \
    {AVR32_USART0_RTS_0_PIN, AVR32_USART0_RTS_0_FUNCTION}       \
  };

  // Set options for the USART
  opt.baudrate = 57600;
  opt.charlength = 8;
  opt.paritytype = USART_NO_PARITY;
  opt.stopbits = USART_1_STOPBIT;
  opt.channelmode = USART_NORMAL_CHMODE;

  // Initialize it in RS232 mode
  usart_init_rs232(usart, &opt, cpu_hz);

  // Setup pio for USART
  pio_enable_module(usart_piomap, 2);

  print(usart, "soo many assholes,so few.... bullets.\n");

  /* Setup interrupts */
  set_interrupts_base( (void *) AVR32_INTC_ADDRESS );
  print(usart, "\nSetting interrupts base...\n");
  register_interrupt( (__int_handler) (usart_int_handler), AVR32_USART2_IRQ/32, AVR32_USART2_IRQ % 32, INT0);
  print(usart, "Adding interrupt handler...\n");
  init_interrupts();
  print(usart, "Initializing interrupts\n");
  usart->ier = 0x000Fffff;
  // (1<<INT_RXRDY) | (1<<INT_TXRDY) | (1<<INT_RXBRK) | (1<<INT_ENDRX) | (1<<INT_ENDTX) | (1<<INT_TXBUFE) | (1<<INT_RXBUFF)

  while(1);

  return 42;
}

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