This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

msp430fr2311 iic使用

Other Parts Discussed in Thread: TIDA-01585, MSP430FR2311

TI达人:

           我使用TIDA-01585的代码,在此基础上修改IIC的管脚配置,为什么IIC模块初始化后UCBBUSY一直处于忙状态,未初始化之前看到寄存器是0,只要将复位清零后,UCBBUSY一直处于忙状态。这个是什么原因?除了将SYSCFG2的USCIBRMP置1外还需要操作什么?

执行最后一行代码后,就出现问题。

    P2SEL0 |= BIT4 | BIT5;                                 //    I2C pin setup P2.4 & P2.5
    UCB0CTLW0 |= UCSWRST;                               //    Reset I2C, stop I2C data, clear IFG & IE.
    UCB0CTLW0 |= UCMODE_3 | UCMST | UCSYNC | UCSSEL_3;     //     I2C mode, Master Mode, SMCLK(16MHz).
    UCB0CTLW1 |= UCASTP_2;                              //     Auto stop genaration.
    UCB0BRW = 38;                                       //     Baud Rate = 16M/40 = 400KHz
    UCB0TBCNT = 255;                                    //
    UCB0CTL1 &= ~UCSWRST;                                //     Released I2C for operation