Hi Bosch sesnrtec community I am using BMI160 IMU (shuttle board) as motion sesnor in my application. The MCU is MSP432P401R. 1- What is the proper wiring configuration for the shuttle board for I2C protocol? 2- I have written the code for I2C read/write functions like below: /************BMI160 I2C*********/ UCB1CTLW0 |= UCSWRST; // **Initialize USCI state machine** P6SEL0 |= BIT4 + BIT5; P6SEL1 &= ~(BIT4 + BIT5); // | P6.3: UCB1SCLK| P6.4: UCB1SIMO | P6.5: UCB1SOMI (Refer to the datasheet, page: 159). UCB1CTLW0 |= UCCKPH + UCMST + UCMSB + UCSYNC + UCSSEL_2 + UCMODE_3; // 3-pin, 8-bit, SPI master UCB1BR0 = 12; // fSCL = SMCLK/12 = ~250kHz UCB1BR1 = 0; UCB1I2CSA = BMI160_I2C_ADDR; // Set slave address UCB1CTLW0 &= ~UCSWRST; // **Initialize USCI state machine** int8_t user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ /* * The parameter dev_id can be used as a variable to store the I2C address of the device */ UCB1CTLW0 |= UCTR + UCTXSTT; // I2C TX, start condition UCB1TXBUF = reg_addr; // Write reg_addr byte UCB1CTLW0 |= UCTXSTP; // I2C stop condition. UCB1I2CSA |= BMI160_I2C_ADDR; // Set slave address UCB1CTLW0 &=~UCA10; //10BIT ADDRESS UCB1CTLW0 &=~UCTR;//CLEAR TRANSMIT MODE UCB1CTLW0 |= UCTXSTT; // I2C RX, start condition int i=0; for (i=0;i<len;i++) { reg_data[i]=UCB1RXBUF; } UCB1CTLW0 |= UCTXSTP; // I2C stop condition. return rslt; } int8_t user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ UCB1CTLW0 |= UCTR + UCTXSTT; // I2C TX, start condition UCB1TXBUF = reg_addr; // Write reg_addr byte int i=0; for (i=0;i<len;i++) { UCB1TXBUF=reg_data[i]; } UCB1CTLW0 |= UCTXSTP; // I2C stop condition. return rslt; } Is it the right statement for them? Thanks Saber
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