testtxptr2000.c

ＰＴＲ2000的驱动程序

//ICC-AVR application builder : 2005-4-8 21:05:22
// Target : M16
// Crystal: 7.3728Mhz

#include <iom16v.h>
#include <macros.h>
#include <stdio.h>
//void putchar(unsigned char c );
//void puts(unsigned char *s );
#define PTR_CS 0
#define PTR_TXEN 3
unsigned char array[6]={'F','F','0','0','5','5'};
void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x09;
 DDRB  = 0x09;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9600 (0.0%)
// char size: 5 bits
// parity: Disabled
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x04;
 UBRRL = 0x2F; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x98;
}

#pragma interrupt_handler uart0_rx_isr:12
void uart0_rx_isr(void)
{
 //uart has received a character in UDR
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 uart0_init();

 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

void main(void)
{

 init_devices();
 PORTB&=~BIT(PB0);
 PORTB|=BIT(PB3);
 
 while(1)
 {
  //puts("FF");
  //puts("00");
  //puts("55");
  puts(array);
 }
}

/*void putchar(unsigned char c)        //字符输出函数
  {
     while (!(UCSRA&(1 << UDRE)));   //判断上次发送有没有完成
     UDR = c;    
  }

void puts(unsigned char *s)
  {
     while (*s)
       {
       	  putchar(*s);
       	  s++;
       }
  }*/