uart._c

电机控制程,用于电机控制,可用于需要的系统中

#include <iom64v.h>
#include <macros.h>
#include "head.h"

uint baudselect(uint baud)//baud的选择
{
 uint bauddata=0;
 if(baud==9600) bauddata=0x47;       //baud=9600
 else if(baud==19200) bauddata=0x23;  //baud=19200
 else if(baud==57600) bauddata=0x0B;  //baud=57600
 return(bauddata);
}
void Uart1Init(uint baud)
{
 CLI(); //disable all interrupts
 UCSR1B = 0x00; //disable while setting baud rate
 UCSR1A=0x00;
 UBRR1H=((baudselect(baud))>>8)&0x00ff;
 UBRR1L=(baudselect(baud))&0x00ff;
 UCSR1B=(1<<RXCIE1)|(1<<RXEN1)|(1<<TXEN1);//接收器与发送器使能
 UCSR1C=(3<<UCSZ10);//设计浈格式：8位数据位，1位停止位，无效验位,异步模式
 SEI(); //re-enable interrupts
} 

void USART_Transmit_byte(uchar bytedata)
{
 while(!(UCSR1A&(1<<UDRE1)));
 	UDR1=bytedata;
}

/***send array_byte data**********/

void USART_Transmit_arraydata(uchar lenght,uchar arraydata[])
{
 uchar i;
 for(i=0;i<lenght;i++)
 		USART_Transmit_byte(arraydata[i]);
}

uchar USART_Flush( void ) 
{ 
unsigned char dummy; 
while ( UCSRA1 & (1<<RXC1) ) dummy = UDR1;        //读UDR会使RXC清零 ]
return dummy;
} 

/*interrupt process***************/

#pragma interrupt_handler uart1_rx_isr:31
void uart1_rx_isr(void) //uart has received a character in UDR
{
	
}