XC_MAX_I2C_WRITE_LENGTH
u8 buf[XC_MAX_I2C_WRITE_LENGTH];
if ((len - pos) > XC_MAX_I2C_WRITE_LENGTH - 2)
XC_MAX_I2C_WRITE_LENGTH;
u8 buf[XC_MAX_I2C_WRITE_LENGTH];
if ((len - pos) > XC_MAX_I2C_WRITE_LENGTH - 2)
XC_MAX_I2C_WRITE_LENGTH;