BQ4050: 读取[0x55 ChargingStatus]命令时，返回的pec校验总是错误，为什么？

您好，请参考文档SMBus Made Simple

www.ti.com/.../slua475.pdf

SMBus 1.1 and later define optional Packet Error Checking (PEC). In that mode, a PEC (packet error code) byte is appended at the end of each transaction. The byte is calculated as CRC-8 checksum, calculated over the entire message including the address and read/write bit. The polynomial used is x8+x2+x+1 (the CRC-8-ATM HEC algorithm, initialized to zero).