MSP430F5529LP的SPI中断方式通讯

只看该作者 · 2020-11-9 17:59

想测试一下MSP430F5529LP这个板子的SPI通讯，用它上面的USCI_B1和USCI_B0的SPI引脚连接，B1作主机，B0作从机，想完成通讯，但是按照MSP430F5xx_6xx_DriverLib_Users_Guide-2_91_13_01.pdf的例子写的程序跑不起来，进入发送中断后，发送中断标志会被清除，然后就没法发送，卡住了，代码如下：

只看该作者 · 2020-11-9 18:00

#include "driverlib.h"
#include "msp430.h"
// Initialize data values
static uint8_t transmitData = 0x01;
static uint8_t receiveData = 0;
int main( void )
{
  WDT_A_hold(WDT_A_BASE);

//Initialize Master,USCI_B1作主机
  USCI_B_SPI_initMasterParam param = {0};
  param.selectClockSource = USCI_B_SPI_CLOCKSOURCE_SMCLK;
  param.clockSourceFrequency = UCS_getSMCLK();
  param.desiredSpiClock = 115200;
  param.msbFirst = USCI_B_SPI_MSB_FIRST;
  param.clockPhase = USCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT;
  param.clockPolarity = USCI_B_SPI_CLOCKPOLARITY_INACTIVITY_HIGH;
  bool returnValue = USCI_B_SPI_initMaster(USCI_B1_BASE, &param);
  if (STATUS_FAIL == returnValue){
return 0;
  }
  //Initialize Slave,USCI_B0作从机
  returnValue = USCI_B_SPI_initSlave(USCI_B0_BASE, USCI_B_SPI_MSB_FIRST,USCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT,USCI_B_SPI_CLOCKPOLARITY_INACTIVITY_HIGH);
  if (STATUS_FAIL == returnValue){
return 0;
  }
  //Enable USCI_B_SPI module
  USCI_B_SPI_enable(USCI_B0_BASE);
  USCI_B_SPI_enable(USCI_B1_BASE);
  //Enable Receive interrupt
  USCI_B_SPI_enableInterrupt(USCI_B0_BASE, UCRXIE);
  USCI_B_SPI_enableInterrupt(USCI_B1_BASE, UCTXIE);
  //Configure port pins to reset slave
  // Wait for slave to initialize
  __delay_cycles(100);

  // USCI_B1 TX buffer ready?
// while (!USCI_B_SPI_getInterruptStatus(USCI_B1_BASE, UCTXIFG));
  //Transmit Data to slave
  //USCI_B_SPI_transmitData(USCI_B1_BASE, transmitData);


  // CPU off, enable interrupts
  __bis_SR_register(LPM0_bits + GIE);
  //while(1);
  }
  //******************************************************************************
  //
  // This is the USCI_B0 interrupt vector service routine.
  //
  //******************************************************************************
  #pragma vector=USCI_B0_VECTOR
  __interrupt void USCI_B0_ISR(void)
  {
  switch(__even_in_range(UCB0IV,4))
  {
  // Vector 2 - RXIFG
  case 2:
while (!USCI_B_SPI_getInterruptStatus(USCI_B0_BASE, UCRXIFG));
receiveData = USCI_B_SPI_receiveData(USCI_B0_BASE);
  break;
  default: break;
  }
  }

  #pragma vector=USCI_B1_VECTOR
  __interrupt void USCI_B1_ISR(void)
  {
  switch(__even_in_range(UCB1IV,4))
  {
  // Vector 2 - RXIFG
  case 4:
  transmitData++;
  // Send next value
  while (!USCI_B_SPI_getInterruptStatus(USCI_B1_BASE, UCTXIFG));
  USCI_B_SPI_transmitData(USCI_B1_BASE, transmitData);
  //Delay between transmissions for slave to process information
  __delay_cycles(40);
  break;
  default: break;
  }
  }

其中使用的函数和宏都是driverlib中给的usci_b_spi.h和.c的，以及板子定义的资源

2万 · 2020-11-9 23:18

建议下载MSP430WARE看看有可以参考的例程不

只看该作者 · 2020-11-10 15:27

zhangmangui 发表于 2020-11-9 23:18
建议下载MSP430WARE看看有可以参考的例程不

我下来了它的参考例程，修改以后能跑，例程的意思是先发送，然后就能进入接受中断（这里不是很明白，为什么发送数据后能进自己的接收中断，我从机根本没发数据，甚至线都没连），然后在中断里继续发送，（主机是MSP430F5529LP,从机是一块调试好的NXP板子）但是我发的数据是0，1，2这样递增，收到的却是128，0，129，1，130，2这样的，有点没想明白

只看该作者 · 2020-11-10 15:31

ddh531810421 发表于 2020-11-10 15:27
我下来了它的参考例程，修改以后能跑，例程的意思是先发送，然后就能进入接受中断（这里不是很明白，为什 ...

#define SPICLK                         500000

uint8_t transmitData = 0x00, receiveData = 0x00;
uint8_t returnValue = 0x00;

void main (void)
{
//Stop watchdog timer
WDT_A_hold(WDT_A_BASE);

//Set P2.6 for cs
GPIO_setAsOutputPin(

      GPIO_PORT_P2,
      GPIO_PIN6
      );
GPIO_setOutputHighOnPin(
      GPIO_PORT_P2,
      GPIO_PIN6
      );

//Set P1.0 to output direction
GPIO_setAsOutputPin(
      GPIO_PORT_P1,
      GPIO_PIN0
      );

//P3.5,4,0 option select
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P3,GPIO_PIN0 + GPIO_PIN1 + GPIO_PIN2);
//GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P2,GPIO_PIN7);
//Initialize Master
USCI_B_SPI_initMasterParam param = {0};
param.selectClockSource = USCI_B_SPI_CLOCKSOURCE_SMCLK;
param.clockSourceFrequency = UCS_getSMCLK();
param.desiredSpiClock = SPICLK;
param.msbFirst = USCI_B_SPI_MSB_FIRST;
param.clockPhase = USCI_B_SPI_PHASE_DATA_CHANGED_ONFIRST_CAPTURED_ON_NEXT;
param.clockPolarity = USCI_B_SPI_CLOCKPOLARITY_INACTIVITY_HIGH;
returnValue =  USCI_B_SPI_initMaster(USCI_B0_BASE, &param);

if (STATUS_FAIL == returnValue){
      return;
}

//Enable SPI module
USCI_B_SPI_enable(USCI_B0_BASE);

//Enable Receive interrupt
USCI_B_SPI_clearInterrupt(USCI_B0_BASE, USCI_B_SPI_RECEIVE_INTERRUPT);
USCI_B_SPI_enableInterrupt(USCI_B0_BASE, USCI_B_SPI_RECEIVE_INTERRUPT);

//LED On
GPIO_setOutputHighOnPin(
      GPIO_PORT_P1,
      GPIO_PIN0
      );
//片选
GPIO_setOutputLowOnPin(
      GPIO_PORT_P2,
      GPIO_PIN6
      );

//Wait for slave to initialize
__delay_cycles(100);

//Initialize data values
transmitData = 0x00;

//USCI_A0 TX buffer ready?
while (!USCI_B_SPI_getInterruptStatus(USCI_B0_BASE,
            USCI_B_SPI_TRANSMIT_INTERRUPT)) ;

//Transmit Data to slave
USCI_B_SPI_transmitData(USCI_B0_BASE, transmitData);
//CPU off, enable interrupts
__bis_SR_register(LPM0_bits + GIE);
}

//******************************************************************************
//
//This is the USCI_B0 interrupt vector service routine.
//
//******************************************************************************
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=USCI_B0_VECTOR
__interrupt
#elif defined(__GNUC__)
__attribute__((interrupt(USCI_B0_VECTOR)))
#endif
void USCI_B0_ISR (void)
{
switch (__even_in_range(UCB0IV,4)){
      //Vector 2 - RXIFG
      case 2:
         //USCI_A0 TX buffer ready?
         while (!USCI_B_SPI_getInterruptStatus(USCI_B0_BASE,
                     USCI_B_SPI_TRANSMIT_INTERRUPT)) ;

         receiveData = USCI_B_SPI_receiveData(USCI_B0_BASE);

         //Increment data
         transmitData++;
         //Send next value
         USCI_B_SPI_transmitData(USCI_B0_BASE,
         transmitData
         );

         //Delay between transmissions for slave to process information
         __delay_cycles(200);

         break;
      default: break;
}
}

MSP430F5529LP的SPI中断方式通讯

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