usart0,32khz,2400.c

包含了msp430单片机上的ADC、定时器A、定时器B、基础时钟、看门狗的初始化及中断程序。基本示例程序

/**********************************************************/
//MSP430 Advanced Developping Components - [BaseComponents_41.C]
////USART0, UART 2400 Echo ISR, 32kHz ACLK
////->>> http://www.dutzm.cn
////->>> tel :[phone]
/**********************************************************/
//MSP430高级实验开发组件 - USART0,32KHz,2400
//时钟设置:
////ACLK = UCLK0 = LFXT1 = 32768, MCLK = SMCLK = DCO~ 800k
////@2400 = 32768Hz/2400 = 13.65 (000Dh)
//当前演示程序功能描述:
////模拟接收端,在主循环中判断标志位,将接收到的数据发送回去
/*********************************************************/

#include <msp430x14x.h>

void main(void) {
	WDTCTL = WDTPW + WDTHOLD;		//停止看门狗
	
	P3SEL |= (BIT4 + BIT5);			//P34,P35 USART0 TXD/RXD
	ME1 |= UTXE0 + URXE0;			//允许USART0 TXD/RXD
	UCTL0 |= CHAR;				//8-bit
	UTCTL0 |= SSEL0;			//UCLK = ACLK
	UBR00 = 0x0D;				//32768/2400 - 13.65
	UBR10 = 0x00;
	UMCTL0 = 0x6B;				//Modulation
	UCTL0 &= ~SWRST;			//初始化USART状态机
	//IE1 |= URXIE0;				//允许USART0 RX中断
	
	while(1) {
		_BIS_SR(LPM3_bits + GIE);	//进入LPM3低功耗模式,允许系统中断
		while(!(IFG1&UTXIFG0));		//等待USART0 TX buffer准备好
		TXBUF0 = RXBUF0;		//RXBUF0 to TXBUF0
	}
}