用f4152进行串口调试，观察寄存器可以看到UCA0TXBUF有数据，但串口调试助手一直没有显示，用的RS485串口，以下是程序，求高手指教#include <msp430x41x2.h>
const char string1[] = { "Hello World\r\n" };
unsigned int j = 0;
void main(void)
{
volatile unsigned int i;
WDTCTL = WDTPW+WDTHOLD; // Stop WDT
UCA0CTL1 |= UCSWRST;
UCA0CTL0 = 0;
FLL_CTL0 |= XCAP11PF; // Configure load caps
do
{
IFG1 &= ~OFIFG; // Clear OSCFault flag
for (i = 0x47FF; i > 0; i--); // Time for flag to set
}
while ((IFG1 & OFIFG)); // OSCFault flag still set?
P6SEL |= BIT5+BIT6; // P6.5,6 = USCI_A0 RXD/TXD
P6DIR &=~BIT5;
P6DIR |= BIT6;
UCA0CTL1 |= UCSSEL_1; // CLK = ACLK
UCA0BR0 = 0x03; // 32k/9600 - 3.41
UCA0BR1 = 0x00; //
UCA0MCTL = UCBRS1 + UCBRS0; // Modulation
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
IE2 |= UCA0TXIE; // Enable USCI_A0 RX interrupt
// ME2 |= UCA0RXE;
while(1)
{
while(!(IFG2&UCA0TXIFG));
UCA0TXBUF = 'A';
for (i = 0x500; i > 0; i--);
}
// _EINT();
// __bis_SR_register(LPM3_bits + GIE); // Enter LPM0, interrupts enabled
}
#pragma vector=USCIAB0TX_VECTOR
__interrupt void USCI0TX_ISR(void)
{
UCA0TXBUF = string1[j++]; // TX next character
if (j == sizeof string1 - 1) // TX over?
{
IE2 &= ~UCA0TXIE; // Disable USCI_A0 TX interrupt
IE2 |= UCA0RXIE;
}
}
#pragma vector=USCIAB0RX_VECTOR
__interrupt void USCI0RX_ISR(void)
{
if (UCA0RXBUF == 'u') // 'u' received?
{
j = 0;
IE2 |= UCA0TXIE; // Enable USCI_A0 TX interrupt
UCA0TXBUF = string1[j++];
}
}
因为之前调试一直无反应，所以先把中断关了，只看发送是否可以发出，但结果却一直是观察寄存器可以看到UCA0TXBUF有数据，但串口调试助手没有显示 |
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