TM4C1230E6PM: problem i2c

Hello,

I have a tm4c1230e6pm who read a bq34z100-z1 gauge. when I have a big current disappearing, I can no longer communicate with the gauge. I have the signals below. I try to reset the I2C with this code:  uint32_t

uint32_t u32_status;
    u32_I2cPort = I2C1_BASE;
    u32_status = HWREG(u32_I2cPort + I2C_O_MCS);
    I2CMasterDisable(u32_I2cPort);
    I2CMasterIntClear(u32_I2cPort);
    I2CMasterIntDisable(u32_I2cPort);
    HWREG(u32_I2cPort + I2C_O_FIFOCTL) = 80008000;
    I2CMasterDisable(u32_I2cPort);
    SysCtlPeripheralDisable(SYSCTL_PERIPH_I2C1);
    HWREG(u32_I2cPort + I2C_O_FIFOCTL) = 80008000;
    SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C1);
    I2CMasterInitExpClk(u32_I2cPort, SysCtlClockGet(), true);
    I2CMasterTimeoutSet(u32_I2cPort,50);
    I2CMasterGlitchFilterConfigSet(u32_I2cPort,I2C_MASTER_GLITCH_FILTER_16);
    //clear I2C FIFOs
    HWREG(u32_I2cPort + I2C_O_FIFOCTL) = 80008000;
    I2CMasterEnable(u32_I2cPort);

But The I2c doesn't work. I measure these signals on the i2c

the red is the clock and the blue is the data. how to reset the I2C?

Thanks

Best Regards,

M.Micou