I2C硬件数据传输

只看该作者 · 2018-1-25 14:18

用169做主机发送数据，然后用5529接收数据，现在发现169在发送数据，但是在5529中怎么也进不了接收数据的中断，上拉电阻也加了，大神们给点意见啊，附上代码：169主机的代码：#include <msp430.h>/file:///C:\Users\ADMINI~1\AppData\Local\Temp\)QN1UH78VKP2T7)IA]ZM(FW.gifar TXData = 0;
int main (void)
{

  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  P3SEL |= 0x0A;                         // Select I2C pins
  P1OUT |= 0x00;
  U0CTL |= I2C + SYNC;                   // Recommended init procedure
  U0CTL &= ~I2CEN;                         // Recommended init procedure
  I2CTCTL |= I2CSSEL1;                   // SMCLK
  I2CNDAT = 0x01;                         // Write one byte
  I2CSA = 0x0048;                         // Slave Address is 048h
  I2CIE = TXRDYIE;                         // Enable RXRDYIFG interrupt
  U0CTL |= I2CEN;                         // Enable I2C
//  I2CDCTL |=0x00;
  __enable_interrupt();                   // Enable interrupts

  while (1)
  {
U0CTL |= MST;                         // Master mode
I2CTCTL |= I2CSTT + I2CSTP + I2CTRX; // Initiate transfer
__bis_SR_register(CPUOFF);             // Enter LPM0
  }

}

// Common ISR for I2C Module
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=USART0TX_VECTOR
__interrupt void I2C_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(USART0TX_VECTOR))) I2C_ISR (void)
#else
#error Compiler not supported!
#endif
{

   I2CDRB = 0x5A;                      // TX data
   while (I2CBUSY & I2CDCTL);          // I2C ready?
   P1OUT |= 0x01;
   P1DIR |= 0x01;
   __bic_SR_register_on_exit(CPUOFF);    // Clear LPM0

}

5529从机的代码：

#include <msp430.h>

volatile unsigned char RXData;

int main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                // Stop WDT
  P3SEL |= 0x03;                         // Assign I2C pins to USCI_B0
  P1OUT = 0;
  UCB0CTL1 |= UCSWRST;                   // Enable SW reset
  UCB0CTL0 = UCMODE_3 + UCSYNC;          // I2C Slave, synchronous mode
  UCB0I2COA = 0x48;                      // Own Address is 048h
  UCB0CTL1 &= ~UCSWRST;                   // Clear SW reset, resume operation
  UCB0IE |= UCRXIE;                      // Enable RX interrupt

  while (1)
  {
__bis_SR_register(LPM0_bits + GIE);    // Enter LPM0, enable interrupts（就停在这里了）
__no_operation();                      // Set breakpoint >>here<< and read
  }                                        // RXData
}

// USCI_B0 Data ISR
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector = USCI_B0_VECTOR
__interrupt void USCI_B0_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(USCI_B0_VECTOR))) USCI_B0_ISR (void)
#else
#error Compiler not supported!
#endif
{                               // Vector 10: RXIFG
RXData = UCB0RXBUF;                   // Get RX data
P1DIR |= 0X01;
P1OUT =0x01;
__bic_SR_register_on_exit(LPM0_bits); // Exit LPM0

}