//******************************************************************************
// MSP430G2xx3 Demo - USCI_A0, 9600 UART Echo ISR, DCO SMCLK
//
// Description: Echo a received character, RX ISR used. Normal mode is LPM0.
// USCI_A0 RX interrupt triggers TX Echo.
// Baud rate divider with 1MHz = 1MHz/9600 = ~104.2
// ACLK = n/a, MCLK = SMCLK = CALxxx_1MHZ = 1MHz
//
// MSP430G2xx3
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// | P1.2/UCA0TXD|------------>
// | | 9600 - 8N1
// | P1.1/UCA0RXD|<------------
//
// D. Dang
// Texas Instruments Inc.
// February 2011
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include "msp430g2553.h"
#include "SPI.h"
#define uchar unsigned char
#define uint unsigned int
unsigned char seg[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
volatile uint x=0;
uchar DataBuffer[]="MSP430 is ready";
unsigned char MST_Data, SLV_Data;
void main(void)
{
WDTCTL = WDTPW + WDTHOLD;
// Stop WDT
BCSCTL1 = CALBC1_1MHZ; // Set DCO
DCOCTL = CALDCO_1MHZ;
P1SEL = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
P1SEL2 = BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD
P1DIR |= BIT2; // All P1.x outputs
P1DIR &=~BIT1;
UCA0CTL1 |= UCSWRST;
UCA0CTL0 |= UCCKPL + UCMSB + UCMST + UCSYNC; // 3-pin, 8-bit SPI master
UCA0CTL1 |= UCSSEL_2; // SMCLK
UCA0BR0 = 0x02; // 1MHz 9600
UCA0BR1 = 0; // 1MHz 9600
UCA0MCTL = 0; // Modulation UCBRSx = 1
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
//IE2 |= UCA0RXIE+UCA0TXIE; // Enable USCI_A0 RX interrupt
//_EINT();
__bis_SR_register(GIE); // Enter LPM0, interrupts enabled
while(1) //串口测试
{
SpiWriteData(0X20); //只写入
char a = SpiWriteData(0xff); //只读取
}
}
/*********************************************************************
* 函 数 名: void UartRx()
* 功能描述: SPI接收中断函数
* 函数说明: 更新接收中断标志位
* 调用函数:
* 全局变量: 无
* 输 入: 无
* 返 回: 无
***********************************************************************/
#pragma vector=USCIAB0RX_VECTOR
__interrupt void USCIA0RX_ISR()
{
while(!(IFG2 & UCA0TXIFG));
UCA0RxFlag=1; //置为接收中断标志位
//__low_power_mode_off_on_exit(); //退出接收中断的低功耗模式
}
/*********************************************************************
* 函 数 名: void UartTx ()
* 功能描述: SPI发送中断函数
* 函数说明: 更新SPI发送中断标志位
* 调用函数:
* 全局变量: 无
* 输 入: 无
* 返 回: 无
***********************************************************************/
#pragma vector=USCIAB0TX_VECTOR
__interrupt void USCIA0TX_ISR ()
{
while(!(IFG2 & UCA0TXIFG));
UCA0TxFlag=1; //置为发送中断标志位
//__low_power_mode_off_on_exit(); //退出低功耗模式
}
为什么进入到中断里面以后就出不来了
