mirror of
https://github.com/phdlee/uvk5cec
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118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
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/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "backlight.h"
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#include "bsp/dp32g030/gpio.h"
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#include "bsp/dp32g030/pwmplus.h"
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#include "bsp/dp32g030/portcon.h"
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#include "driver/gpio.h"
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#include "settings.h"
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// this is decremented once every 500ms
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uint16_t gBacklightCountdown_500ms = 0;
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bool backlightOn;
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void BACKLIGHT_InitHardware()
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{
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// 48MHz / 94 / 1024 ~ 500Hz
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const uint32_t PWM_FREQUENCY_HZ = 1000;
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PWM_PLUS0_CLKSRC |= ((48000000 / 1024 / PWM_FREQUENCY_HZ) << 16);
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PWM_PLUS0_PERIOD = 1023;
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PORTCON_PORTB_SEL0 &= ~(0
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// Back light
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| PORTCON_PORTB_SEL0_B6_MASK
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);
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PORTCON_PORTB_SEL0 |= 0
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// Back light PWM
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| PORTCON_PORTB_SEL0_B6_BITS_PWMP0_CH0
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;
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PWM_PLUS0_GEN =
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PWMPLUS_GEN_CH0_OE_BITS_ENABLE |
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PWMPLUS_GEN_CH0_OUTINV_BITS_ENABLE |
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0;
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PWM_PLUS0_CFG =
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PWMPLUS_CFG_CNT_REP_BITS_ENABLE |
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PWMPLUS_CFG_COUNTER_EN_BITS_ENABLE |
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0;
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}
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void BACKLIGHT_TurnOn(void)
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{
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if (gEeprom.BACKLIGHT_TIME == 0) {
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BACKLIGHT_TurnOff();
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return;
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}
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backlightOn = true;
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BACKLIGHT_SetBrightness(gEeprom.BACKLIGHT_MAX);
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switch (gEeprom.BACKLIGHT_TIME) {
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default:
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case 1: // 5 sec
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case 2: // 10 sec
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case 3: // 20 sec
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gBacklightCountdown_500ms = 1 + (2 << (gEeprom.BACKLIGHT_TIME - 1)) * 5;
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break;
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case 4: // 1 min
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case 5: // 2 min
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case 6: // 4 min
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gBacklightCountdown_500ms = 1 + (2 << (gEeprom.BACKLIGHT_TIME - 4)) * 60;
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break;
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case 7: // always on
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gBacklightCountdown_500ms = 0;
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break;
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}
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}
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void BACKLIGHT_TurnOff()
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{
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#ifdef ENABLE_BLMIN_TMP_OFF
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register uint8_t tmp;
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if (gEeprom.BACKLIGHT_MIN_STAT == BLMIN_STAT_ON)
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tmp = gEeprom.BACKLIGHT_MIN;
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else
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tmp = 0;
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BACKLIGHT_SetBrightness(tmp);
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#else
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BACKLIGHT_SetBrightness(gEeprom.BACKLIGHT_MIN);
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#endif
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gBacklightCountdown_500ms = 0;
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backlightOn = false;
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}
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bool BACKLIGHT_IsOn()
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{
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return backlightOn;
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}
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static uint8_t currentBrightness;
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void BACKLIGHT_SetBrightness(uint8_t brigtness)
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{
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currentBrightness = brigtness;
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PWM_PLUS0_CH0_COMP = (1 << brigtness) - 1;
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//PWM_PLUS0_SWLOAD = 1;
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}
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uint8_t BACKLIGHT_GetBrightness(void)
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{
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return currentBrightness;
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}
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