'stm32 IIC cannot output low level
The device works normally at room temperature, but the stm32 IIC communication was found to be abnormal during the working test at high temperature of 85°C. During debugging, it was found that both the I2C simulated by IO and the hardware I2C communication could not output a low level. At present, it is suspected that the power supply to the MCU is unstable, resulting in stm32 works abnormally.
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