3e7a09cb0d
What works:
- LCD: 16-bit RGB565
- all buttons, including scrollwheel
- SD Card
- Battery level and charging/not charging status
- USB
- audio
- sample rate switching
- HP / LO detect, with "safe" fixed LO volume -
LO volume will only be put to user-defined max volume
if headphones are not present.
- rtc
- Plugins build, tried a couple and they seem OK
- Bootloader, installable to nand via usbboot
What doesn't work:
- Dual Boot
- power on/off has intermittent, low volume audio click
(sometimes it's completely silent, sometimes there's
a click)
- Audio uses 16-bit volume scaling, so clicking/popping
is pretty bad at lower volumes - need 32 bit volume
scaling, 24 bit I2S data
- USB HID keys not yet defined
- no jztool support
Unknowns:
- Stereo Switch pins: Direction select, AC_DC
(probably not even hooked up)
- What is the actual purpose of the Stereo Swtich?
- How does the bluetooth module connect?
"Someday" stuff:
- get LCD working at higher bit depth
- Bluetooth
Change-Id: I70dda8fc092c6e3f4352f2245e4164193f803c33
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2021 Aidan MacDonald, Dana Conrad
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "backlight.h"
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#include "backlight-target.h"
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#include "lcd.h"
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#include "pwm-x1000.h"
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#define BL_LCD_CHN 0
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#define BL_LCD_PERIOD 30000
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static int backlight_calc_duty(int period, int min_duty, int brightness)
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{
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return min_duty + (period - min_duty) * brightness / MAX_BRIGHTNESS_SETTING;
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}
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bool backlight_hw_init(void)
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{
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pwm_init(BL_LCD_CHN);
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pwm_enable(BL_LCD_CHN);
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backlight_hw_brightness(MAX_BRIGHTNESS_SETTING);
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return true;
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}
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void backlight_hw_on(void)
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{
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pwm_enable(BL_LCD_CHN);
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#ifdef HAVE_LCD_ENABLE
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lcd_enable(true);
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#endif
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}
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void backlight_hw_off(void)
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{
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pwm_disable(BL_LCD_CHN);
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#ifdef HAVE_LCD_ENABLE
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lcd_enable(false);
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#endif
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}
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void backlight_hw_brightness(int brightness)
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{
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int duty_ns = backlight_calc_duty(BL_LCD_PERIOD, 0, brightness);
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pwm_set_period(BL_LCD_CHN, BL_LCD_PERIOD, duty_ns);
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}
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