Analysis of possible causes of I2C failure

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Analysis of possible causes of I2C failure [Copy link]

I2C is not working, possible reasons and analysis steps:
1. Check whether the power is on correctly
2. Check whether the master input clock (mclk) of the slave chip is correct
3. Check whether the i2c line configuration (i2c controller configuration) is correct
4. Check whether the i2c address and i2c rate configuration of the slave device are correct

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1. Also check whether the line is connected;

2. Is there a pull-up resistor and is it suitable?

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There are many hardware problems

For example, the level at both ends