帮忙看看这个程序-试用UART不成功
芯片是CC430F5137,板子是利尔达的评估板，硬件应该没有问题，修改一个样例程序，实际测试：单片机发送数据没有问题，可就是接收不行。按照程序逻辑，计算机发一个字节，单片机就返回一个字节，可实际测试发现，单片机总也不中断，不知道为什么。恳请帮忙指导一下。#defineLED_RBIT 6
#defineLED_GBIT 7
#defineLED_DIR P2DIR
#defineLED_OUT P2OUT
#defineLED_SEL P2SEL
#defineLEDR_ON() LED_OUT|=(1<<LED_RBIT)
#defineLEDG_ON() LED_OUT|=(1<<LED_GBIT)
#defineLEDR_OFF() LED_OUT&=~(1<<LED_RBIT)
#defineLEDG_OFF() LED_OUT&=~(1<<LED_GBIT)
#include "cc430x513x.h"
void Delay();
void InitChip();
void main(void)
{
InitChip();
while(1)
{
LEDR_ON();
Delay();
LEDR_OFF();
Delay();
//__bis_SR_register(LPM3_bits + GIE); // Enter LPM3, interrupts enabled
__no_operation(); // For debugger
//UCA0TXBUF=0x38; 如果加上这条语句，计算机上可以收到数据0x38
}
}
// Echo back RXed character, confirm TX buffer is ready first
#pragma vector=USCI_A0_VECTOR
__interrupt void USCI_A0_ISR(void)
{
switch(__even_in_range(UCA0IV,4))
{
case 0:break; // Vector 0 - no interrupt
case 2: // Vector 2 - RXIFG
while (!(UCA0IFG&UCTXIFG)); // USCI_A0 TX buffer ready?
UCA0TXBUF = UCA0RXBUF; // TX -> RXed character
LEDG_ON();
break;
case 4:
LEDG_ON();
break; // Vector 4 - TXIFG
default: break;
}
}
void Delay()
{
unsigned short intInx;
unsigned short intCnt;
for(intInx=0;intInx<100;intInx++)
for(intCnt=0;intCnt<800;intCnt++);
}
void InitChip()
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
// Set up LEDs
LED_OUT&=~((1<<LED_RBIT)|(1<<LED_GBIT)); // LED端口输出0
LED_DIR|=(1<<LED_RBIT)|(1<<LED_GBIT); // LED端口方向设置为输出
PMAPPWD = 0x02D52; // Get write-access to port mapping regs
P1MAP5 = PM_UCA0RXD; // Map UCA0RXD output to P1.5
P1MAP6 = PM_UCA0TXD; // Map UCA0TXD output to P1.6
PMAPPWD = 0; // Lock port mapping registers
P1DIR |= BIT6; // Set P1.6 as TX output
P1SEL |= (BIT5 + BIT6); // Select P1.5 & P1.6 to UART function
UCA0CTL1 |= UCSWRST; // **Put state machine in reset**
UCA0CTL1 |= UCSSEL_1; // CLK = ACLK
UCA0BR0 = 0x03; // 32kHz/9600=3.41 (see User's Guide)
UCA0BR1 = 0x00; //
UCA0MCTL = UCBRS_3+UCBRF_0; // Modulation UCBRSx=3, UCBRFx=0
UCA0IE |= UCRXIE; // Enable USCI_A0 RX interrupt
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
_EINT();
}
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