I2C error

Hello, I am working on a battery project. I use the BQ27542 IC to read the data on the two pins PB6 and PB7 of STM32F103C8T6 and display the results on the 1602. LCD screen. However, I got no results. Please tell me where the error is. Thanks.

test_v1.3.ino (1.34 KB)

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Please post your code.

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