usart._c

来自「单片机应用 1.1602LCD 2.2004LCD源码 3.ATmega1」· _C 代码 · 共 63 行

#include <iom32v.h>
#include <macros.h>
#include <stdio.h>
void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0x00;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x02;
 DDRD  = 0xff;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x2F; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x18;
}

//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 Puts( unsigned char *s) // \arg pointer to a string ending by \0
{
  
	 while (*s) 
      {
	 putchar(*s);
	 s++;
      }
}

void main(void)
{
 init_devices();
 while(1)
 {
puts("www.ouravr.com MY NAME IS PASYONG");
 }
}