sh_dac_output
sh_dac_output(0, DAC_SPEAKER_VOLUME);
sh_dac_output(0, pdata->channel);
sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
sh_dac_output(255-(u8)intensity, DAC_LCD_BRIGHTNESS);
sh_dac_output(*chip->buffer_begin, chip->pdata->channel);