uart0.rar_UART c++_c++ uart windows_c++ uart协议

//****************************************************************************** //调试成功，自发自收，发0x55，波特率1200bps，格式为：起始位＋d0+d1+d2+d3+d4+d5+d6+d7 共８位 // Baud rate divider with 32768Hz = 32768Hz/1200 = ~27.31 32768/1200=27.31 // ACLK =32768HZ // // MSP430F149 // ----------------- // /|\| XIN|- // | | | // --|RST XOUT|- // | | // | P3.4/UCA0TXD|------------> // | | 1200 - 8N1 // | P3.5/UCA0RXD|<------------ // //****************************************************************************** #include "msp430x14x.h" void main(void) { unsigned char revbuf; WDTCTL = WDTPW + WDTHOLD; // Stop WDT P3SEL = 0x30; // P3.4,5 = USCI_A0 TXD/RXD UTCTL0 |= SSEL0; // ACLK UBR00 = 0x1b; // 32768Hz 1200; (27.31)decimal = 1bh UBR10 = 0; // 32768Hz 1200 UMCTL0 = 0x03; // Modulation UCBRSx = 1 U0CTL |=CHAR+PENA+SPB; //发送字节 U0ME |= UTXE0+URXE0; U0CTL &= ~SWRST; // **Initialize USCI state machine** IE1 |= URXIE0; // Enable USCI_A0 RX interrupt U0TXBUF =0x55; while(1) { __bis_SR_register(LPM0_bits + GIE); // Enter LPM0, interrupts enabled revbuf=U0RXBUF; revbuf=U0RXBUF; } } void delay(unsigned char t) //150 us { unsigned char i,j; for(i=0;i<t;i++) for(j=0;j<30;j++){;} } // Echo back RXed character, confirm TX buffer is ready first #pragma vector=USART0RX_VECTOR __interrupt void USART0RX_ISR(void) { while (!(IFG1&UTXIFG0)); // USCI_A0 TX buffer ready? U0TXBUF = U0RXBUF; // TX -> RXed character delay(80); }