USB251XB_I2C_REG_SZ
char i2c_wb[USB251XB_I2C_REG_SZ];
memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);
for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {