uart.c

MSP430单片机串口程序

#include <msp430x12x.h>
#include "uart.h"
#include "main.h"

void uart_org(void)
{
 U0CTL|= CHAR;
 U0TCTL|= SSEL0;                       // UCLK = ACLK



 UBR00= 0x03;                          // 32768/9600
 UBR10= 0x00;
 UMCTL0= 0x4a;
 ME2|= UTXE0 + URXE0;                     // Modulation
  IE2|=URXIE0;

 P3SEL |= 0x30;                         // P3.4,5 = USART0 TXD/RXD
P3DIR |= 0x10;
 UCTL0&=~SWRST;
   IE2|=URXIE0;

 /*U0CTL|= CHAR;//8bit 字符长度
 UTCTL0|=SSEL0;//外部时钟
 UBR00=0xc0;//
 UBR10= 0x00;////
 UMCTL0= 0x00;//
 ME2|=UTXE0+URXE0;//波特率=brclk/(ubr+(M7+M6+....+M0)/8)=7.3728/192=0.0384
 IE2|=URXIE0;//
 P3SEL |= 0x30;                         // P3.4,5 = USART0 TXD/RXD
 P3DIR |= 0x10;
 UCTL0&=~SWRST;
 IE2|=URXIE0;*/



}
void UartStr(unsigned char *p)
{
  unsigned char i;
  for (i=0;*p!=0;i++)//准备要发送的数据
     {
       while (!(IFG2 & UTXIFG0));// USART0 TX buffer ready?
       TXBUF0 =*p++; // RXBUF0 to TXBUF0
       while ((UTCTL0 & TXEPT) == 0);
     }
  _NOP();
}
void Uart_Str(unsigned char number,unsigned char *p)
{
  unsigned char i;
  for (i=0;i<number;i++)//准备要发送的数据
     {
       while (!(IFG2 & UTXIFG0));// USART0 TX buffer ready?
       TXBUF0 =*p++; // RXBUF0 to TXBUF0
       while ((UTCTL0 & TXEPT) == 0);
     }
  _NOP();
}