Function gx_i2c_read

---

int gx_i2c_read(unsigned char bus_id, unsigned char slv_addr, unsigned char *buf, unsigned char address_width, unsigned char *rx_data, unsigned short len)

i2c读取数据

参数

• bus_id -- i2c总线id

• slv_addr -- i2c slave地址

• buf -- 寄存器地址数据

• address_width -- 寄存器地址长度

• rx_data -- 读取数据

• len -- 读取数据长度

Returns 0

成功

Returns -1

失败