Abnormality detection method, device, host equipment, system and storage medium

The invention provides an anomaly detection method and device, host equipment, a system and a storage medium, and relates to the field of I2C tests.The method comprises the steps that all channels in an I2C channel expander are shielded, a CPLD is used for detecting an I2C controller, and a first detection result is obtained; when the first detection result is that the I2C controller is normal, controlling the I2C controller to detect the I2C channel expander to obtain a second detection result; when the second detection result is that the I2C channel expander is normal, the channels are opened, and the I2C controller is controlled to detect the I2C slave devices connected with the channels to obtain a third detection result; when the third detection result is that the I2C slave device is normal, quitting the detection; when an abnormal result exists in the first detection result, the second detection result and the third detection result, outputting alarm information corresponding to the abnormal result; the