How to enable I2C 10-bit addressing on ncs v2.4.2?

I need to use nRF5240 device to control LED driver IC through I2C interface. And I also need to use I2C 10-bit addressing. How to enable I2C 10-bit addressing on ncs v2.4.2?

  • Thanks for your reply! I can read/write registers now.

    static int _lp5861ReadReg(uint16_t regAddr, uint8_t *regVal) {
        printk("tca6424aReadReg(regAddr=0x%x)\n", regAddr);
        const uint16_t devAddr   = LP5861_CHIP_ADDRESS | _lp5861GetRegAddrHigh(regAddr);
        const uint8_t  startAddr = _lp5861GetRegAddrLow(regAddr);
        printk("devAddr=0x%x, startAddr=0x%x\n", devAddr, startAddr);
        uint8_t rbuf[2];
        const int ret = i2c_burst_read(_gI2cDev, devAddr, startAddr, rbuf, sizeof(rbuf));
        if (ret < 0) {
            printk("i2c_burst_read(0x%x) failed, ret=%d\n", regAddr, ret);
            return ERROR_I2C_READ_FAIL;
        }
    
        printk("rbuf[0]=0x%x, rbuf[1]=0x%x\n", rbuf[0], rbuf[1]);
        *regVal = rbuf[0];
        return 0;
    }
    
    static int _lp5861WriteReg(uint16_t regAddr, uint8_t regVal) {
        printk("tca6424aWriteReg(regAddr=0x%x, regVal0x%x)\n", regAddr, regVal);
        const uint16_t devAddr   = LP5861_CHIP_ADDRESS | _lp5861GetRegAddrHigh(regAddr);
        const uint8_t  startAddr = _lp5861GetRegAddrLow(regAddr);
        printk("_lp5861GetRegAddrHigh(regAddr)=0x%x\n", _lp5861GetRegAddrHigh(regAddr));
        printk("devAddr=0x%x, startAddr=0x%x\n", devAddr, startAddr);
        const uint8_t wbuf[2] = { regVal,  0x00};
        const int ret =  i2c_burst_write(_gI2cDev, devAddr, startAddr, wbuf, sizeof(wbuf));
        if (ret < 0) {
            printk("i2c_burst_write(0x%x) failed, ret=%d\n", regAddr, ret);
            return ERROR_I2C_WRITE_FAIL;
        }
    
        return 0;
    }

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