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BQ27426: BQ27426读写问题

Part Number: BQ27426
Other Parts Discussed in Thread: EV2400

使用STM32通过IIC与BQ27426通信,看用户手册第4.2章节里,在获取 Current Chem ID.时,指令是rd 0x00 0x08 0x00,根据3.1和3.3的内容,我先发送写指令0xAA 0x00 0x08 0x00,再发送读指令0xAA 0x00 0xAB register,查看返回的register,返回0xFF,理论应该是0x00,请问错在哪了,有没有27426和STM32通信的历程,在2015版用户手册第59页里提到的Sample C code, which can interact with the gauge (read/write registers and commands) as well as configure the gauge, can be found here: processors.wiki.ti.com/.../Android_Software_Solutions_for_TI_Singlecell_Gas_Gauges.目前已经失效了