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On ESP32 fade the backlight

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This commit is contained in:
Ryan Press 2024-01-29 03:15:29 -08:00
parent 54ca24405b
commit 91faf61474
2 changed files with 24 additions and 8 deletions
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28
src/dev/esp32/esp32.cpp
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@ -9,6 +9,7 @@
#include "esp_system.h"
#include <rom/rtc.h> // needed to get the ResetInfo
#include "driver/adc.h"
#include "driver/ledc.h"
#include "esp_adc_cal.h"
#include "esp_efuse.h"
@ -253,7 +254,8 @@ void Esp32Device::set_backlight_pin(uint8_t pin)
ledcSetup(BACKLIGHT_CHANNEL, BACKLIGHT_FREQUENCY, 10);
#endif
ledcAttachPin(pin, BACKLIGHT_CHANNEL);
update_backlight();
ledc_fade_func_install(0);
update_backlight(false);
} else {
LOG_VERBOSE(TAG_GUI, F("Backlight : Pin not set"));
}
@ -262,7 +264,7 @@ void Esp32Device::set_backlight_pin(uint8_t pin)
void Esp32Device::set_backlight_invert(bool invert)
{
_backlight_invert = invert;
update_backlight();
update_backlight(false);
}
bool Esp32Device::get_backlight_invert()
@ -273,7 +275,7 @@ bool Esp32Device::get_backlight_invert()
void Esp32Device::set_backlight_level(uint8_t level)
{
_backlight_level = level;
update_backlight();
update_backlight(true);
}
uint8_t Esp32Device::get_backlight_level()
@ -284,7 +286,7 @@ uint8_t Esp32Device::get_backlight_level()
void Esp32Device::set_backlight_power(bool power)
{
_backlight_power = power;
update_backlight();
update_backlight(true);
}
bool Esp32Device::get_backlight_power()
@ -292,18 +294,30 @@ bool Esp32Device::get_backlight_power()
return _backlight_power != 0;
}
void Esp32Device::update_backlight()
void Esp32Device::update_backlight(bool fade)
{
static uint32_t last_duty = 0;
if(_backlight_pin < GPIO_NUM_MAX) {
#if !defined(CONFIG_IDF_TARGET_ESP32S2)
uint32_t duty = _backlight_power ? map(_backlight_level, 0, 255, 0, 1023) : 0;
if(_backlight_invert) duty = 1023 - duty;
ledcWrite(BACKLIGHT_CHANNEL, duty); // ledChannel and value
if(fade) {
ledcWrite(BACKLIGHT_CHANNEL, last_duty); // this will stop an in-progress fade
ledc_set_fade_time_and_start(LEDC_LOW_SPEED_MODE, (ledc_channel_t) BACKLIGHT_CHANNEL, duty, BACKLIGHT_FADEMS, LEDC_FADE_NO_WAIT);
} else {
ledcWrite(BACKLIGHT_CHANNEL, duty); // ledChannel and value
}
#else
uint32_t duty = _backlight_power ? map(_backlight_level, 0, 255, 0, 1023) : 0;
if(_backlight_invert) duty = 1023 - duty;
ledcWrite(BACKLIGHT_CHANNEL, duty); // ledChannel and value
if(fade) {
ledcWrite(BACKLIGHT_CHANNEL, last_duty); // this will stop an in-progress fade
ledc_set_fade_time_and_start(LEDC_LOW_SPEED_MODE, (ledc_channel_t) BACKLIGHT_CHANNEL, duty, BACKLIGHT_FADEMS, LEDC_FADE_NO_WAIT);
} else {
ledcWrite(BACKLIGHT_CHANNEL, duty); // ledChannel and value
}
#endif
last_duty = duty;
}
// haspTft.tft.writecommand(0x53); // Write CTRL Display

4
src/dev/esp32/esp32.h
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@ -13,6 +13,8 @@
#define BACKLIGHT_FREQUENCY 20000
#endif
#define BACKLIGHT_FADEMS 200
#ifdef __cplusplus
extern "C" {
#endif
@ -67,7 +69,7 @@ class Esp32Device : public BaseDevice {
uint8_t _backlight_power;
uint8_t _backlight_invert;
void update_backlight();
void update_backlight(bool fade);
};
} // namespace dev