Ken Van Hoeylandt
3b5a401594
* **New Features** * Added native display support for ST7796, ILI9341, and ST7789 panels across supported boards. * Added FT5x06 and FT6x36 touchscreen support. * Generic PWM driver * ESP32 PWM driver * Generic RGB LED driver * RGB PWM LED driver * RGB GPIO LED driver * Implementation of RGB LED for various boards * **Improvements** * Updated board hardware descriptions to use explicit display/touch/backlight device-tree bindings and disabled deprecated HAL usage. * Improved display and touch-driver cleanup to prevent stale resources and improve shutdown reliability. * Pinned esp-hosted library to a fixed version * **Deletions** * Obsolete placeholder display * Legacy ILI9488 support. * ESP32-specific LEDC PWM implementation
148 lines
4.1 KiB
C++
148 lines
4.1 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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#include <tactility/drivers/gpio_backlight.h>
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#include <tactility/device.h>
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#include <tactility/driver.h>
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#include <tactility/drivers/backlight.h>
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#include <tactility/drivers/gpio_controller.h>
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#include <tactility/drivers/gpio_descriptor.h>
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#include <tactility/log.h>
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#include <tactility/module.h>
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#include <new>
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#define TAG "GpioBacklight"
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#define GET_CONFIG(device) (static_cast<const GpioBacklightConfig*>((device)->config))
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#define GET_INTERNAL(device) (static_cast<GpioBacklightInternal*>(device_get_driver_data(device)))
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extern "C" {
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struct GpioBacklightInternal {
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GpioDescriptor* descriptor;
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bool enabled;
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};
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// region GpioBacklightApi
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static error_t enable(Device* device) {
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auto* internal = GET_INTERNAL(device);
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error_t error = gpio_descriptor_set_level(internal->descriptor, true);
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if (error != ERROR_NONE) {
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LOG_E(TAG, "Failed to enable backlight");
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return error;
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}
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internal->enabled = true;
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return ERROR_NONE;
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}
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static error_t disable(Device* device) {
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auto* internal = GET_INTERNAL(device);
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error_t error = gpio_descriptor_set_level(internal->descriptor, false);
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if (error != ERROR_NONE) {
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LOG_E(TAG, "Failed to disable backlight");
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return error;
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}
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internal->enabled = false;
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return ERROR_NONE;
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}
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// endregion
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// region BacklightApi
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static error_t gpio_backlight_set_brightness(Device* device, uint8_t brightness) {
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return brightness > 0 ? enable(device) : disable(device);
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}
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static error_t gpio_backlight_set_brightness_default(Device* device) {
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return GET_CONFIG(device)->enabled ? enable(device) : disable(device);
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}
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static error_t gpio_backlight_get_brightness(Device* device, uint8_t* out_brightness) {
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*out_brightness = GET_INTERNAL(device)->enabled ? 1 : 0;
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return ERROR_NONE;
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}
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static uint8_t gpio_backlight_get_min_brightness(Device*) {
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return 0;
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}
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static uint8_t gpio_backlight_get_max_brightness(Device*) {
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return 1;
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}
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// endregion
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static constexpr BacklightApi GPIO_BACKLIGHT_API = {
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.set_brightness = gpio_backlight_set_brightness,
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.set_brightness_default = gpio_backlight_set_brightness_default,
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.get_brightness = gpio_backlight_get_brightness,
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.get_min_brightness = gpio_backlight_get_min_brightness,
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.get_max_brightness = gpio_backlight_get_max_brightness,
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};
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// region Driver lifecycle
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static error_t start(Device* device) {
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const auto* config = GET_CONFIG(device);
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auto* descriptor = gpio_descriptor_acquire(config->pin.gpio_controller, config->pin.pin, GPIO_OWNER_GPIO);
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if (descriptor == nullptr) {
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LOG_E(TAG, "Failed to acquire GPIO descriptor");
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return ERROR_RESOURCE;
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}
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if (gpio_descriptor_set_flags(descriptor, config->pin.flags | GPIO_FLAG_DIRECTION_OUTPUT) != ERROR_NONE) {
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LOG_E(TAG, "Failed to configure backlight pin as output");
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gpio_descriptor_release(descriptor);
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return ERROR_RESOURCE;
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}
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auto* internal = new(std::nothrow) GpioBacklightInternal { .descriptor = descriptor, .enabled = false };
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if (internal == nullptr) {
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gpio_descriptor_release(descriptor);
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return ERROR_OUT_OF_MEMORY;
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}
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device_set_driver_data(device, internal);
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if (gpio_backlight_set_brightness_default(device) != ERROR_NONE) {
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// Allowed to fail, we don't care about the result
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LOG_W(TAG, "gpio_backlight_set_brightness_default(%s) failed", device->name);
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}
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return ERROR_NONE;
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}
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static error_t stop(Device* device) {
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disable(device); // Allowed to fail, we don't care about the result
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auto* internal = GET_INTERNAL(device);
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gpio_descriptor_release(internal->descriptor);
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device_set_driver_data(device, nullptr);
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delete internal;
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return ERROR_NONE;
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}
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// endregion
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extern Module root_module;
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Driver gpio_backlight_driver = {
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.name = "gpio_backlight",
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.compatible = (const char*[]) { "gpio-backlight", nullptr },
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.start_device = start,
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.stop_device = stop,
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.api = &GPIO_BACKLIGHT_API,
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.device_type = &BACKLIGHT_TYPE,
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.owner = &root_module,
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.internal = nullptr
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};
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}
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