Hi @Saket_Om,Thank you for your solution.Which function can I use to read the registers of BQ25720's battery IC? Thanks,PSR.

Hello @Saket_Om ,I’m utilizingHAL_SMBUS_RegisterCallback(hsmbus, HAL_SMBUS_MASTER_TX_COMPLETE_CB_ID, TxComplete_Callback);HAL_SMBUS_RegisterCallback(hsmbus, HAL_SMBUS_MASTER_RX_COMPLETE_CB_ID, RxComplete_Callback);HAL_SMBUS_RegisterCallback(hsmbus, H...

Hello @Saket_Om,Thank you for your response. I attempted to implement the above code; but,HAL_SMBUS_RegisterCallbackis not enabled. How do I enable? Thanks,PSR

Hello @Karl Yamashita,        Please see the attached bq25720_evm.pdf. I connected L4 series SDA and SCL lines, and everything I did for your information was implemented; please review the logic analyzer output of SMBus lines. Thanks,PSR.   

Hello @Saket_Om ,Thank you for the insight. I tried the aforementioned snippet. Could you possibly review my code and log? Could you kindly assist me develop? Thanks,PSR