TI中文支持网用的官方给的例程，改了地址和数据，程序就会死在一句标志位检查语句
一直死在while里，这是在driverlib.c文件中
while (!BITBAND_PERI(EUSCI_B_CMSIS(moduleInstance)->rIFG.r, UCTXIFG_OFS))；
我的程序，如下，死在了标红的语句里。
/* DriverLib Defines */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>
/* Standard Defines */
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
/* Slave Address for I2C Slave */
#define SLAVE_ADDRESS 0xD0
#define NUM_OF_REC_BYTES 1
/* Variables */
const uint8_t TXData[] = {0x6B,0x00};
static uint8_t RXData;
/* I2C Master Configuration Parameter */
const eUSCI_I2C_MasterConfig i2cConfig =
{
EUSCI_B_I2C_CLOCKSOURCE_SMCLK, // SMCLK Clock Source
3000000, // SMCLK = 3MHz (default)
EUSCI_B_I2C_SET_DATA_RATE_100KBPS, // Desired I2C Clock of 100khz
0, // No byte counter threshold
EUSCI_B_I2C_NO_AUTO_STOP // No Autostop
};
int main(void)
{
/* Disabling the Watchdog */
MAP_WDT_A_holdTimer();
/* Select Port 1 for I2C – Set Pin 6, 7 to input Primary Module Function,
* (UCB0SIMO/UCB0SDA, UCB0SOMI/UCB0SCL).
*/
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P1,
GPIO_PIN6 + GPIO_PIN7, GPIO_PRIMARY_MODULE_FUNCTION);
MAP_GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);
MAP_GPIO_setAsOutputPin(GPIO_PORT_P2, GPIO_PIN1);
MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P2, GPIO_PIN1);
/* Initializing I2C Master to SMCLK at 100khz with no autostop */
MAP_I2C_initMaster(EUSCI_B0_BASE, &i2cConfig);
/* Specify slave address */
MAP_I2C_setSlaveAddress(EUSCI_B0_BASE, SLAVE_ADDRESS);
/* Enable I2C Module to start operations */
MAP_I2C_enableModule(EUSCI_B0_BASE);
MAP_Interrupt_enableInterrupt(INT_EUSCIB0);
// enable RX interrupts
MAP_I2C_enableInterrupt(EUSCI_B0_BASE, EUSCI_B_I2C_RECEIVE_INTERRUPT0);
while (1)
{
RXData=0;
/* Making sure the last transaction has been completely sent out */
while (MAP_I2C_masterIsStopSent(EUSCI_B0_BASE));
/* Send out EEPROM Mock Read Cmd (2 databytes) */
MAP_I2C_masterSendMultiByteStart(EUSCI_B0_BASE, TXData[1]); // Start + 1Byte
MAP_I2C_masterSendMultiByteNext(EUSCI_B0_BASE, TXData[0]); // Poll for TXINT,Send 1Byte
/*———————————————*/
/* Now we need to initiate the read */
/* Wait until 2nd Byte has been output to shift register */
while(!(EUSCI_B0->IFG & EUSCI_B_IFG_TXIFG0));
// Send the restart condition, read one byte, send the stop condition right away
EUSCI_B0->CTLW0 &= ~(EUSCI_B_CTLW0_TR);
EUSCI_B0->CTLW0 |= EUSCI_B_CTLW0_TXSTT;
while(MAP_I2C_masterIsStartSent(EUSCI_B0_BASE));
EUSCI_B0->CTLW0 |= EUSCI_B_CTLW0_TXSTP;
//while(!(EUSCI_B0->IFG & EUSCI_B_IFG_RXIFG0));
//RXData = EUSCI_B0->RXBUF;
//———————————
MAP_PCM_gotoLPM0InterruptSafe();
// Slave should send a single 'R' back
if(RXData != 'R'){
// Error- set P1.0 high
MAP_GPIO_setOutputHighOnPin(GPIO_PORT_P1, GPIO_PIN0);
while(1);
}
__delay_cycles(300000); // ~100ms pause between transmissions
}
}
/*******************************************************************************
* eUSCIB0 ISR. The repeated start and transmit/receive operations happen
* within this ISR.
*******************************************************************************/
void EUSCIB0_IRQHandler(void)
{
uint_fast16_t status;
status = MAP_I2C_getEnabledInterruptStatus(EUSCI_B0_BASE);
MAP_I2C_clearInterruptFlag(EUSCI_B0_BASE, status);
/* Receives bytes into the receive buffer. If we have received all bytes,
* send a STOP condition */
if (status & EUSCI_B_I2C_RECEIVE_INTERRUPT0)
{
// One-byte Read
RXData = MAP_I2C_masterReceiveSingle(EUSCI_B0_BASE);
MAP_GPIO_toggleOutputOnPin(GPIO_PORT_P2, GPIO_PIN1);
}
}
Susan Yang：
有可能是踩了勘误表里的USCI43
user5356195：
回复 Susan Yang:
我设置的是同步模式，查看寄存器也是同步模式，是我对UCBxCTLW0、UCBxSTATW、UCBxRXBUF、UCBxTXBUF、UCBxIFG和UCBxIV进行寄存器访问吗？我在那条语句I2C_masterSendMultiByteNext(EUSCI_B0_BASE, TXData[0]); 上面右加了一个启动条件，EUSCI_B0->CTLW0 |= EUSCI_B_CTLW0_TXSTT;全是可以正常进行，但这样会有什么影响吗。
Susan Yang：
回复 user5356195:
1 您的主从机使用的是同步时钟源？
2 有可能是您对这些寄存器操作造成的，在勘误表内有说明，避免在接收或发送时访问这些寄存器
3 建议使用勘误表内的CTLW1
