有没有做过MSP430G2553硬件IIC从机 程序的？
本帖最后由 miaoguoqiang 于 2015-9-9 14:38 编辑最近在调试MSP430G2553硬件IIC从机 ，无法进入接收中断和起始信号的中断。
按照官方的代码调试也进不去中断。主机部分是用的模拟IIC主机与从机通信的，模拟IIC主机程序能够正常操作EEPROM等时钟芯片。
初始化部分，P16P17都加了10k上拉电阻
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P1SEL |= BIT6 + BIT7; // Assign I2C pins to USCI_B0
P1SEL2|= BIT6 + BIT7; // Assign I2C pins to USCI_B0
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
UCB0I2CIE |= UCSTPIE + UCSTTIE; // Enable STT and STP interrupt
IE2 |= UCB0RXIE; // Enable RX interrupt
while (1)
{
PRxData = (unsigned char *)RxBuffer; // Start of RX buffer
RXByteCtr = 0; // Clear RX byte count
__bis_SR_register(CPUOFF + GIE); // Enter LPM0 w/ interrupts
// Remain in LPM0 until master
// finishes TX
__no_operation(); // Set breakpoint >>here<< and read
} // read out the RxData buffer
}
中断程序<在中断中加入断点，调试无法进入>
//------------------------------------------------------------------------------
// The USCI_B0 data ISR is used to move received data from the I2C master
// to the MSP430 memory.
//------------------------------------------------------------------------------
#pragma vector = USCIAB0TX_VECTOR
__interrupt void USCIAB0TX_ISR(void)
{
*PRxData++ = UCB0RXBUF; // Move RX data to address PRxData
RXByteCtr++; // Increment RX byte count
}
//------------------------------------------------------------------------------
// The USCI_B0 state ISR is used to wake up the CPU from LPM0 in order to
// process the received data in the main program. LPM0 is only exit in case
// of a (re-)start or stop condition when actual data was received.
//------------------------------------------------------------------------------
#pragma vector = USCIAB0RX_VECTOR
__interrupt void USCIAB0RX_ISR(void)
{
UCB0STAT &= ~(UCSTPIFG + UCSTTIFG); // Clear interrupt flags
if (RXByteCtr) // Check RX byte counter
__bic_SR_register_on_exit(CPUOFF); // Exit LPM0 if data was
} // received
有调试过的请指教一下。 P16 P17的第二功能可以作为串口使用吗 已经搞定了。。。。。。。。。。。。{:mad:}{:mad:}{:mad:}{:mad:}{:mad:}
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