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MSP430F5529: 使用例程与pc端上位机无法进行数据传输

Part Number: MSP430F5529
Other Parts Discussed in Thread: MSP-EXP430F5529LP

#include <msp430f5529.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT

  P3SEL |= BIT3+BIT4;                       // P3.3,4 = USCI_A0 TXD/RXD
  UCA0CTL1 |= UCSWRST;                      // **Put state machine in reset**
  UCA0CTL1 |= UCSSEL_2;                     // SMCLK
  UCA0BR0 = 9;                              // 1MHz 115200 (see User's Guide)
  UCA0BR1 = 0;                              // 1MHz 115200
  UCA0MCTL |= UCBRS_1 + UCBRF_0;            // Modulation UCBRSx=1, UCBRFx=0
  UCA0CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
  UCA0IE |= UCRXIE;                         // Enable USCI_A0 RX interrupt

  __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0, interrupts enabled
  __no_operation();                         // For debugger
}

// 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
    break;
  case 4:break;                             // Vector 4 - TXIFG
  default: break;
  }
}

  • 您使用的是launchpad?那您需要修改部分代码

    USCI_A0 改为使用 USCI_A1

    P3SEL 需要改为 P4SEL |= BIT4+BIT5;

    整体代码如下

    /* --COPYRIGHT--,BSD_EX
     * Copyright (c) 2012, Texas Instruments Incorporated
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     *
     * *  Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     *
     * *  Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * *  Neither the name of Texas Instruments Incorporated nor the names of
     *    its contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
     * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *******************************************************************************
     *
     *                       MSP430 CODE EXAMPLE DISCLAIMER
     *
     * MSP430 code examples are self-contained low-level programs that typically
     * demonstrate a single peripheral function or device feature in a highly
     * concise manner. For this the code may rely on the device's power-on default
     * register values and settings such as the clock configuration and care must
     * be taken when combining code from several examples to avoid potential side
     * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
     * for an API functional library-approach to peripheral configuration.
     *
     * --/COPYRIGHT--*/
    //******************************************************************************
    //   MSP430F552x Demo - USCI_A0, 115200 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 1048576hz = 1048576/115200 = ~9.1 (009h|01h)
    //   ACLK = REFO = ~32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
    //   See User Guide for baud rate divider table
    //
    //                 MSP430F552x
    //             -----------------
    //         /|\|                 |
    //          | |                 |
    //          --|RST              |
    //            |                 |
    //            |     P3.3/UCA0TXD|------------>
    //            |                 | 115200 - 8N1
    //            |     P3.4/UCA0RXD|<------------
    //
    //   Bhargavi Nisarga
    //   Texas Instruments Inc.
    //   April 2009
    //   Built with CCSv4 and IAR Embedded Workbench Version: 4.21
    //******************************************************************************
    
    #include <msp430.h>
    
    int main(void)
    {
      WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT
    
      P4SEL |= BIT4+BIT5;                       // P3.3,4 = USCI_A0 TXD/RXD
      UCA1CTL1 |= UCSWRST;                      // **Put state machine in reset**
      UCA1CTL1 |= UCSSEL_2;                     // SMCLK
      UCA1BR0 = 9;                              // 1MHz 115200 (see User's Guide)
      UCA1BR1 = 0;                              // 1MHz 115200
      UCA1MCTL |= UCBRS_1 + UCBRF_0;            // Modulation UCBRSx=1, UCBRFx=0
      UCA1CTL1 &= ~UCSWRST;                     // **Initialize USCI state machine**
      UCA1IE |= UCRXIE;                         // Enable USCI_A0 RX interrupt
    
      __bis_SR_register(LPM0_bits + GIE);       // Enter LPM0, interrupts enabled
      __no_operation();                         // For debugger
    }
    
    // Echo back RXed character, confirm TX buffer is ready first
    #if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
    #pragma vector=USCI_A1_VECTOR
    __interrupt void USCI_A1_ISR(void)
    #elif defined(__GNUC__)
    void __attribute__ ((interrupt(USCI_A1_VECTOR))) USCI_A1_ISR (void)
    #else
    #error Compiler not supported!
    #endif
    {
      switch(__even_in_range(UCA1IV,4))
      {
      case 0:break;                             // Vector 0 - no interrupt
      case 2:                                   // Vector 2 - RXIFG
        while (!(UCA1IFG&UCTXIFG));             // USCI_A0 TX buffer ready?
        UCA1TXBUF = UCA1RXBUF;                  // TX -> RXed character
        break;
      case 4:break;                             // Vector 4 - TXIFG
      default: break;
      }
    }
    
    

  • 你好,我试了一下,还是没法在上位机上显示数据

  • 上面的程序是我刚刚测试过的

    使用的是MSP-EXP430F5529LP

    例程是回显,您需要在串口助手输入一个字符,如 1

    而后点击CCS内的运行按键,暂停后,串口助手就会出现 1

  • 谢谢,解决了,一直没结果原因是跳线帽没有接好

  • 你知道怎么样用printf来在端口打印数字吗