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Implement st7796 and migrate 3248s035c
This commit is contained in:
Ken Van Hoeylandt
parent
f99970a562
commit
43ab5fa304
@ -1,7 +1,6 @@
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file(GLOB_RECURSE SOURCE_FILES Source/*.c*)
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file(GLOB_RECURSE SOURCE_FILES source/*.c*)
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idf_component_register(
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idf_component_register(
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SRCS ${SOURCE_FILES}
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SRCS ${SOURCE_FILES}
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INCLUDE_DIRS "Source"
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REQUIRES TactilityKernel driver
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REQUIRES Tactility esp_lvgl_port ST7796 GT911 PwmBacklight driver vfs fatfs
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)
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)
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@ -1,32 +0,0 @@
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#include "devices/Display.h"
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#include <driver/gpio.h>
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#include <PwmBacklight.h>
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#include <Tactility/hal/Configuration.h>
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using namespace tt::hal;
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static bool initBoot() {
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//Set the RGB Led Pins to output and turn them off
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ESP_ERROR_CHECK(gpio_set_direction(GPIO_NUM_4, GPIO_MODE_OUTPUT)); //Red
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ESP_ERROR_CHECK(gpio_set_direction(GPIO_NUM_16, GPIO_MODE_OUTPUT)); //Green
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ESP_ERROR_CHECK(gpio_set_direction(GPIO_NUM_17, GPIO_MODE_OUTPUT)); //Blue
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//0 on, 1 off... yep it's backwards.
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ESP_ERROR_CHECK(gpio_set_level(GPIO_NUM_4, 1)); //Red
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ESP_ERROR_CHECK(gpio_set_level(GPIO_NUM_16, 1)); //Green
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ESP_ERROR_CHECK(gpio_set_level(GPIO_NUM_17, 1)); //Blue
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return driver::pwmbacklight::init(LCD_PIN_BACKLIGHT);
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}
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static DeviceVector createDevices() {
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return {
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createDisplay(),
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};
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}
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extern const Configuration hardwareConfiguration = {
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.initBoot = initBoot,
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.createDevices = createDevices
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};
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@ -1,40 +0,0 @@
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#include "Display.h"
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#include <Gt911Touch.h>
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#include <PwmBacklight.h>
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#include <St7796Display.h>
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#include <tactility/check.h>
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#include <tactility/device.h>
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static std::shared_ptr<tt::hal::touch::TouchDevice> createTouch() {
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auto* i2c = device_find_by_name("i2c0");
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check(i2c);
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auto configuration = std::make_unique<Gt911Touch::Configuration>(
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i2c,
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LCD_HORIZONTAL_RESOLUTION,
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LCD_VERTICAL_RESOLUTION
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);
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return std::make_shared<Gt911Touch>(std::move(configuration));
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}
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std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
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auto touch = createTouch();
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auto configuration = std::make_unique<St7796Display::Configuration>(
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LCD_SPI_HOST,
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LCD_PIN_CS,
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LCD_PIN_DC,
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LCD_HORIZONTAL_RESOLUTION,
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LCD_VERTICAL_RESOLUTION,
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touch,
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false,
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true,
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false,
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false
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);
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configuration->backlightDutyFunction = driver::pwmbacklight::setBacklightDuty;
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auto display = std::make_shared<St7796Display>(std::move(configuration));
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return std::reinterpret_pointer_cast<tt::hal::display::DisplayDevice>(display);
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}
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@ -1,20 +0,0 @@
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#pragma once
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#include <Tactility/hal/display/DisplayDevice.h>
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#include <memory>
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#include <driver/gpio.h>
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#include <driver/spi_common.h>
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// Display backlight (PWM)
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constexpr auto LCD_PIN_BACKLIGHT = GPIO_NUM_27;
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// Display
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constexpr auto LCD_SPI_HOST = SPI2_HOST;
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constexpr auto LCD_PIN_CS = GPIO_NUM_15;
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constexpr auto LCD_PIN_DC = GPIO_NUM_2;
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constexpr auto LCD_HORIZONTAL_RESOLUTION = 320;
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constexpr auto LCD_VERTICAL_RESOLUTION = 480;
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constexpr auto LCD_BUFFER_HEIGHT = LCD_VERTICAL_RESOLUTION / 10;
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constexpr auto LCD_BUFFER_SIZE = LCD_HORIZONTAL_RESOLUTION * LCD_BUFFER_HEIGHT;
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std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay();
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@ -1,23 +0,0 @@
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#include <tactility/module.h>
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extern "C" {
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static error_t start() {
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// Empty for now
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return ERROR_NONE;
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}
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static error_t stop() {
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// Empty for now
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return ERROR_NONE;
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}
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struct Module cyd_3248s035c_module = {
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.name = "cyd-3248s035c",
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.start = start,
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.stop = stop,
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.symbols = nullptr,
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.internal = nullptr
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};
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}
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@ -7,7 +7,9 @@
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#include <tactility/bindings/esp32_spi.h>
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#include <tactility/bindings/esp32_spi.h>
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#include <tactility/bindings/esp32_uart.h>
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#include <tactility/bindings/esp32_uart.h>
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#include <tactility/bindings/esp32_sdspi.h>
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#include <tactility/bindings/esp32_sdspi.h>
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#include <tactility/bindings/display_placeholder.h>
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#include <tactility/bindings/esp32_ledc_backlight.h>
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#include <bindings/st7796.h>
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#include <bindings/gt911.h>
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/ {
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/ {
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compatible = "root";
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compatible = "root";
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@ -29,6 +31,13 @@
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clock-frequency = <400000>;
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clock-frequency = <400000>;
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pin-sda = <&gpio0 33 GPIO_FLAG_NONE>;
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pin-sda = <&gpio0 33 GPIO_FLAG_NONE>;
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pin-scl = <&gpio0 32 GPIO_FLAG_NONE>;
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pin-scl = <&gpio0 32 GPIO_FLAG_NONE>;
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touch {
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compatible = "goodix,gt911";
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reg = <0x5D>;
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x-max = <320>;
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y-max = <480>;
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};
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};
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};
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// CN1 header
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// CN1 header
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@ -40,15 +49,29 @@
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pin-scl = <&gpio0 22 GPIO_FLAG_NONE>;
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pin-scl = <&gpio0 22 GPIO_FLAG_NONE>;
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};
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};
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display_backlight {
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compatible = "espressif,esp32-ledc-backlight";
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// Off by default so display power-on won't show the screen from before the last power loss.
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// The display backlight is turned on during the boot process.
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status = "disabled";
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pin-backlight = <&gpio0 27 GPIO_FLAG_NONE>;
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};
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spi0 {
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spi0 {
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compatible = "espressif,esp32-spi";
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compatible = "espressif,esp32-spi";
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host = <SPI2_HOST>;
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host = <SPI2_HOST>;
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cs-gpios = <&gpio0 15 GPIO_FLAG_NONE>;
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cs-gpios = <&gpio0 15 GPIO_FLAG_NONE>;
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pin-mosi = <&gpio0 13 GPIO_FLAG_NONE>;
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pin-mosi = <&gpio0 13 GPIO_FLAG_NONE>;
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pin-sclk = <&gpio0 14 GPIO_FLAG_NONE>;
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pin-sclk = <&gpio0 14 GPIO_FLAG_NONE>;
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display {
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display@0 {
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compatible = "display-placeholder";
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compatible = "sitronix,st7796";
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horizontal-resolution = <320>;
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vertical-resolution = <480>;
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mirror-x;
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pixel-clock-hz = <80000000>;
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pin-dc = <&gpio0 2 GPIO_FLAG_NONE>;
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backlight = <&display_backlight>;
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};
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};
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};
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};
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@ -7,6 +7,8 @@ hardware.target=ESP32
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hardware.flashSize=4MB
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hardware.flashSize=4MB
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hardware.spiRam=false
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hardware.spiRam=false
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dependencies.useDeprecatedHal=false
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storage.userDataLocation=SD
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storage.userDataLocation=SD
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display.size=3.5"
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display.size=3.5"
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@ -1,3 +1,5 @@
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dependencies:
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dependencies:
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- Platforms/platform-esp32
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- Platforms/platform-esp32
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- Drivers/st7796-module
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- Drivers/gt911-module
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dts: cyd,3248s035c.dts
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dts: cyd,3248s035c.dts
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34
Devices/cyd-3248s035c/source/module.cpp
Normal file
34
Devices/cyd-3248s035c/source/module.cpp
Normal file
@ -0,0 +1,34 @@
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#include <tactility/module.h>
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#include <tactility/error.h>
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#include <driver/gpio.h>
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extern "C" {
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static error_t start() {
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// Set the RGB LED pins to output and turn them off (0 on, 1 off)
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gpio_set_direction(GPIO_NUM_4, GPIO_MODE_OUTPUT); // Red
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gpio_set_direction(GPIO_NUM_16, GPIO_MODE_OUTPUT); // Green
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gpio_set_direction(GPIO_NUM_17, GPIO_MODE_OUTPUT); // Blue
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gpio_set_level(GPIO_NUM_4, 1); // Red
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gpio_set_level(GPIO_NUM_16, 1); // Green
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gpio_set_level(GPIO_NUM_17, 1); // Blue
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return ERROR_NONE;
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}
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static error_t stop() {
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// Empty for now
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return ERROR_NONE;
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}
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struct Module cyd_3248s035c_module = {
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.name = "cyd-3248s035c",
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.start = start,
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.stop = stop,
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.symbols = nullptr,
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.internal = nullptr
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};
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}
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11
Drivers/st7796-module/CMakeLists.txt
Normal file
11
Drivers/st7796-module/CMakeLists.txt
Normal file
@ -0,0 +1,11 @@
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cmake_minimum_required(VERSION 3.20)
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include("${CMAKE_CURRENT_LIST_DIR}/../../Buildscripts/module.cmake")
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file(GLOB_RECURSE SOURCE_FILES "source/*.c*")
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tactility_add_module(st7796-module
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SRCS ${SOURCE_FILES}
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INCLUDE_DIRS include/
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REQUIRES TactilityKernel platform-esp32 esp_lcd_st7796 driver
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)
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195
Drivers/st7796-module/LICENSE-Apache-2.0.md
Normal file
195
Drivers/st7796-module/LICENSE-Apache-2.0.md
Normal file
@ -0,0 +1,195 @@
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|
Apache License
|
||||||
|
==============
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|
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|
_Version 2.0, January 2004_
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||||||
|
_<<http://www.apache.org/licenses/>>_
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|
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|
### Terms and Conditions for use, reproduction, and distribution
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“License” shall mean the terms and conditions for use, reproduction, and
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distribution as defined by Sections 1 through 9 of this document.
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|
||||||
|
Works, if and wherever such third-party notices normally appear. The contents of
|
||||||
|
the NOTICE file are for informational purposes only and do not modify the
|
||||||
|
License. You may add Your own attribution notices within Derivative Works that
|
||||||
|
You distribute, alongside or as an addendum to the NOTICE text from the Work,
|
||||||
|
provided that such additional attribution notices cannot be construed as
|
||||||
|
modifying the License.
|
||||||
|
|
||||||
|
You may add Your own copyright statement to Your modifications and may provide
|
||||||
|
additional or different license terms and conditions for use, reproduction, or
|
||||||
|
distribution of Your modifications, or for any such Derivative Works as a whole,
|
||||||
|
provided Your use, reproduction, and distribution of the Work otherwise complies
|
||||||
|
with the conditions stated in this License.
|
||||||
|
|
||||||
|
#### 5. Submission of Contributions
|
||||||
|
|
||||||
|
Unless You explicitly state otherwise, any Contribution intentionally submitted
|
||||||
|
for inclusion in the Work by You to the Licensor shall be under the terms and
|
||||||
|
conditions of this License, without any additional terms or conditions.
|
||||||
|
Notwithstanding the above, nothing herein shall supersede or modify the terms of
|
||||||
|
any separate license agreement you may have executed with Licensor regarding
|
||||||
|
such Contributions.
|
||||||
|
|
||||||
|
#### 6. Trademarks
|
||||||
|
|
||||||
|
This License does not grant permission to use the trade names, trademarks,
|
||||||
|
service marks, or product names of the Licensor, except as required for
|
||||||
|
reasonable and customary use in describing the origin of the Work and
|
||||||
|
reproducing the content of the NOTICE file.
|
||||||
|
|
||||||
|
#### 7. Disclaimer of Warranty
|
||||||
|
|
||||||
|
Unless required by applicable law or agreed to in writing, Licensor provides the
|
||||||
|
Work (and each Contributor provides its Contributions) on an “AS IS” BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
|
||||||
|
including, without limitation, any warranties or conditions of TITLE,
|
||||||
|
NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
|
||||||
|
solely responsible for determining the appropriateness of using or
|
||||||
|
redistributing the Work and assume any risks associated with Your exercise of
|
||||||
|
permissions under this License.
|
||||||
|
|
||||||
|
#### 8. Limitation of Liability
|
||||||
|
|
||||||
|
In no event and under no legal theory, whether in tort (including negligence),
|
||||||
|
contract, or otherwise, unless required by applicable law (such as deliberate
|
||||||
|
and grossly negligent acts) or agreed to in writing, shall any Contributor be
|
||||||
|
liable to You for damages, including any direct, indirect, special, incidental,
|
||||||
|
or consequential damages of any character arising as a result of this License or
|
||||||
|
out of the use or inability to use the Work (including but not limited to
|
||||||
|
damages for loss of goodwill, work stoppage, computer failure or malfunction, or
|
||||||
|
any and all other commercial damages or losses), even if such Contributor has
|
||||||
|
been advised of the possibility of such damages.
|
||||||
|
|
||||||
|
#### 9. Accepting Warranty or Additional Liability
|
||||||
|
|
||||||
|
While redistributing the Work or Derivative Works thereof, You may choose to
|
||||||
|
offer, and charge a fee for, acceptance of support, warranty, indemnity, or
|
||||||
|
other liability obligations and/or rights consistent with this License. However,
|
||||||
|
in accepting such obligations, You may act only on Your own behalf and on Your
|
||||||
|
sole responsibility, not on behalf of any other Contributor, and only if You
|
||||||
|
agree to indemnify, defend, and hold each Contributor harmless for any liability
|
||||||
|
incurred by, or claims asserted against, such Contributor by reason of your
|
||||||
|
accepting any such warranty or additional liability.
|
||||||
|
|
||||||
|
_END OF TERMS AND CONDITIONS_
|
||||||
|
|
||||||
|
### APPENDIX: How to apply the Apache License to your work
|
||||||
|
|
||||||
|
To apply the Apache License to your work, attach the following boilerplate
|
||||||
|
notice, with the fields enclosed by brackets `[]` replaced with your own
|
||||||
|
identifying information. (Don't include the brackets!) The text should be
|
||||||
|
enclosed in the appropriate comment syntax for the file format. We also
|
||||||
|
recommend that a file or class name and description of purpose be included on
|
||||||
|
the same “printed page” as the copyright notice for easier identification within
|
||||||
|
third-party archives.
|
||||||
|
|
||||||
|
Copyright [yyyy] [name of copyright owner]
|
||||||
|
|
||||||
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
you may not use this file except in compliance with the License.
|
||||||
|
You may obtain a copy of the License at
|
||||||
|
|
||||||
|
http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
|
||||||
|
Unless required by applicable law or agreed to in writing, software
|
||||||
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
See the License for the specific language governing permissions and
|
||||||
|
limitations under the License.
|
||||||
|
|
||||||
77
Drivers/st7796-module/bindings/sitronix,st7796.yaml
Normal file
77
Drivers/st7796-module/bindings/sitronix,st7796.yaml
Normal file
@ -0,0 +1,77 @@
|
|||||||
|
description: Sitronix ST7796 display panel
|
||||||
|
|
||||||
|
compatible: "sitronix,st7796"
|
||||||
|
|
||||||
|
bus: spi
|
||||||
|
|
||||||
|
properties:
|
||||||
|
horizontal-resolution:
|
||||||
|
type: int
|
||||||
|
required: true
|
||||||
|
description: Horizontal resolution in pixels
|
||||||
|
vertical-resolution:
|
||||||
|
type: int
|
||||||
|
required: true
|
||||||
|
description: Vertical resolution in pixels
|
||||||
|
gap-x:
|
||||||
|
type: int
|
||||||
|
default: 0
|
||||||
|
description: X offset applied to all draw operations
|
||||||
|
gap-y:
|
||||||
|
type: int
|
||||||
|
default: 0
|
||||||
|
description: Y offset applied to all draw operations
|
||||||
|
swap-xy:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Swap the X and Y axes
|
||||||
|
mirror-x:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Mirror the X axis
|
||||||
|
mirror-y:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Mirror the Y axis
|
||||||
|
invert-color:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Invert the panel's color output
|
||||||
|
bgr-order:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Use BGR element order instead of RGB
|
||||||
|
bits-per-pixel:
|
||||||
|
type: int
|
||||||
|
default: 16
|
||||||
|
description: Color depth in bits per pixel
|
||||||
|
pixel-clock-hz:
|
||||||
|
type: int
|
||||||
|
default: 40000000
|
||||||
|
description: SPI pixel clock frequency in Hz
|
||||||
|
transaction-queue-depth:
|
||||||
|
type: int
|
||||||
|
default: 10
|
||||||
|
description: Size of the internal SPI transaction queue
|
||||||
|
gamma-curve:
|
||||||
|
type: int
|
||||||
|
default: 1
|
||||||
|
min: 0
|
||||||
|
max: 3
|
||||||
|
description: Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up
|
||||||
|
pin-dc:
|
||||||
|
type: phandles
|
||||||
|
required: true
|
||||||
|
description: Data/Command GPIO pin
|
||||||
|
pin-reset:
|
||||||
|
type: phandles
|
||||||
|
default: GPIO_PIN_SPEC_NONE
|
||||||
|
description: Reset GPIO pin
|
||||||
|
reset-active-high:
|
||||||
|
type: boolean
|
||||||
|
default: false
|
||||||
|
description: Whether the reset pin is active high
|
||||||
|
backlight:
|
||||||
|
type: phandle
|
||||||
|
default: "NULL"
|
||||||
|
description: Optional reference to this display's backlight device
|
||||||
3
Drivers/st7796-module/devicetree.yaml
Normal file
3
Drivers/st7796-module/devicetree.yaml
Normal file
@ -0,0 +1,3 @@
|
|||||||
|
dependencies:
|
||||||
|
- TactilityKernel
|
||||||
|
bindings: bindings
|
||||||
7
Drivers/st7796-module/include/bindings/st7796.h
Normal file
7
Drivers/st7796-module/include/bindings/st7796.h
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
// SPDX-License-Identifier: Apache-2.0
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <tactility/bindings/bindings.h>
|
||||||
|
#include <drivers/st7796.h>
|
||||||
|
|
||||||
|
DEFINE_DEVICETREE(st7796, struct St7796Config)
|
||||||
38
Drivers/st7796-module/include/drivers/st7796.h
Normal file
38
Drivers/st7796-module/include/drivers/st7796.h
Normal file
@ -0,0 +1,38 @@
|
|||||||
|
// SPDX-License-Identifier: Apache-2.0
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <stdbool.h>
|
||||||
|
|
||||||
|
#include <tactility/device.h>
|
||||||
|
#include <tactility/drivers/gpio.h>
|
||||||
|
|
||||||
|
struct St7796Config {
|
||||||
|
uint16_t horizontal_resolution;
|
||||||
|
uint16_t vertical_resolution;
|
||||||
|
int32_t gap_x;
|
||||||
|
int32_t gap_y;
|
||||||
|
bool swap_xy;
|
||||||
|
bool mirror_x;
|
||||||
|
bool mirror_y;
|
||||||
|
bool invert_color;
|
||||||
|
bool bgr_order;
|
||||||
|
uint32_t bits_per_pixel;
|
||||||
|
uint32_t pixel_clock_hz;
|
||||||
|
uint8_t transaction_queue_depth;
|
||||||
|
// Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up.
|
||||||
|
uint8_t gamma_curve;
|
||||||
|
struct GpioPinSpec pin_dc;
|
||||||
|
struct GpioPinSpec pin_reset;
|
||||||
|
bool reset_active_high;
|
||||||
|
// Optional reference to this display's backlight device, NULL if none.
|
||||||
|
struct Device* backlight;
|
||||||
|
};
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
14
Drivers/st7796-module/include/st7796_module.h
Normal file
14
Drivers/st7796-module/include/st7796_module.h
Normal file
@ -0,0 +1,14 @@
|
|||||||
|
// SPDX-License-Identifier: Apache-2.0
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <tactility/module.h>
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif
|
||||||
|
|
||||||
|
extern struct Module st7796_module;
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
}
|
||||||
|
#endif
|
||||||
32
Drivers/st7796-module/source/module.cpp
Normal file
32
Drivers/st7796-module/source/module.cpp
Normal file
@ -0,0 +1,32 @@
|
|||||||
|
// SPDX-License-Identifier: Apache-2.0
|
||||||
|
#include <tactility/check.h>
|
||||||
|
#include <tactility/driver.h>
|
||||||
|
#include <tactility/module.h>
|
||||||
|
|
||||||
|
extern "C" {
|
||||||
|
|
||||||
|
extern Driver st7796_driver;
|
||||||
|
|
||||||
|
static error_t start() {
|
||||||
|
/* We crash when construct fails, because if a single driver fails to construct,
|
||||||
|
* there is no guarantee that the previously constructed drivers can be destroyed */
|
||||||
|
check(driver_construct_add(&st7796_driver) == ERROR_NONE);
|
||||||
|
return ERROR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t stop() {
|
||||||
|
/* We crash when destruct fails, because if a single driver fails to destruct,
|
||||||
|
* there is no guarantee that the previously destroyed drivers can be recovered */
|
||||||
|
check(driver_remove_destruct(&st7796_driver) == ERROR_NONE);
|
||||||
|
return ERROR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
Module st7796_module = {
|
||||||
|
.name = "st7796",
|
||||||
|
.start = start,
|
||||||
|
.stop = stop,
|
||||||
|
.symbols = nullptr,
|
||||||
|
.internal = nullptr
|
||||||
|
};
|
||||||
|
|
||||||
|
} // extern "C"
|
||||||
335
Drivers/st7796-module/source/st7796.cpp
Normal file
335
Drivers/st7796-module/source/st7796.cpp
Normal file
@ -0,0 +1,335 @@
|
|||||||
|
// SPDX-License-Identifier: Apache-2.0
|
||||||
|
#include <drivers/st7796.h>
|
||||||
|
#include <st7796_module.h>
|
||||||
|
|
||||||
|
#include <tactility/check.h>
|
||||||
|
#include <tactility/device.h>
|
||||||
|
#include <tactility/driver.h>
|
||||||
|
#include <tactility/drivers/display.h>
|
||||||
|
#include <tactility/drivers/esp32_spi.h>
|
||||||
|
#include <tactility/drivers/spi_controller.h>
|
||||||
|
#include <tactility/error.h>
|
||||||
|
#include <tactility/log.h>
|
||||||
|
|
||||||
|
#include <esp_err.h>
|
||||||
|
#include <esp_lcd_io_spi.h>
|
||||||
|
#include <esp_lcd_panel_commands.h>
|
||||||
|
#include <esp_lcd_panel_io.h>
|
||||||
|
#include <esp_lcd_panel_ops.h>
|
||||||
|
#include <esp_lcd_st7796.h>
|
||||||
|
|
||||||
|
#include <freertos/semphr.h>
|
||||||
|
|
||||||
|
#include <cstdlib>
|
||||||
|
|
||||||
|
#define TAG "ST7796"
|
||||||
|
|
||||||
|
#define GET_CONFIG(device) (static_cast<const St7796Config*>((device)->config))
|
||||||
|
|
||||||
|
// Maps gamma-curve devicetree index [0,3] to the MIPI DCS GAMSET (0x26) parameter value. Mirrors
|
||||||
|
// the deprecated HAL's St7796Display::setGammaCurve() (Drivers/ST7796) - note the non-linear
|
||||||
|
// mapping, not index+1.
|
||||||
|
static const uint8_t GAMMA_CURVE_VALUES[4] = { 0x01, 0x04, 0x02, 0x08 };
|
||||||
|
|
||||||
|
struct St7796Internal {
|
||||||
|
esp_lcd_panel_io_handle_t io_handle;
|
||||||
|
esp_lcd_panel_handle_t panel_handle;
|
||||||
|
// Given from ISR context by on_color_trans_done() once a queued SPI transfer physically
|
||||||
|
// completes. draw_bitmap() blocks on this so it can honor DisplayApi's synchronous contract
|
||||||
|
// (see lvgl_display.c: the caller reuses/overwrites the color buffer as soon as draw_bitmap
|
||||||
|
// returns) - esp_lcd_panel_draw_bitmap() itself only queues the transfer and returns early.
|
||||||
|
SemaphoreHandle_t draw_done_semaphore;
|
||||||
|
};
|
||||||
|
|
||||||
|
// Fires for every completed SPI transaction on this IO (not just draw_bitmap's color transfers -
|
||||||
|
// bring-up commands like reset/init/gap go through the same IO), called from ISR context.
|
||||||
|
static bool IRAM_ATTR on_color_trans_done(esp_lcd_panel_io_handle_t, esp_lcd_panel_io_event_data_t*, void* user_ctx) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(user_ctx);
|
||||||
|
BaseType_t high_task_woken = pdFALSE;
|
||||||
|
xSemaphoreGiveFromISR(internal->draw_done_semaphore, &high_task_woken);
|
||||||
|
return high_task_woken == pdTRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int pin_or_unused(const struct GpioPinSpec& pin) {
|
||||||
|
return pin.gpio_controller == nullptr ? -1 : static_cast<int>(pin.pin);
|
||||||
|
}
|
||||||
|
|
||||||
|
// region Driver lifecycle
|
||||||
|
|
||||||
|
static error_t start(Device* device) {
|
||||||
|
auto* parent = device_get_parent(device);
|
||||||
|
check(device_get_type(parent) == &SPI_CONTROLLER_TYPE);
|
||||||
|
|
||||||
|
const auto* spi_config = static_cast<const Esp32SpiConfig*>(parent->config);
|
||||||
|
const auto* config = GET_CONFIG(device);
|
||||||
|
|
||||||
|
struct GpioPinSpec cs_pin;
|
||||||
|
if (esp32_spi_get_cs_pin(device, &cs_pin) != ERROR_NONE) {
|
||||||
|
LOG_E(TAG, "Failed to resolve CS pin");
|
||||||
|
return ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
auto* internal = static_cast<St7796Internal*>(malloc(sizeof(St7796Internal)));
|
||||||
|
if (internal == nullptr) {
|
||||||
|
return ERROR_OUT_OF_MEMORY;
|
||||||
|
}
|
||||||
|
|
||||||
|
internal->draw_done_semaphore = xSemaphoreCreateBinary();
|
||||||
|
if (internal->draw_done_semaphore == nullptr) {
|
||||||
|
free(internal);
|
||||||
|
return ERROR_OUT_OF_MEMORY;
|
||||||
|
}
|
||||||
|
|
||||||
|
esp_lcd_panel_io_spi_config_t io_config = {
|
||||||
|
.cs_gpio_num = pin_or_unused(cs_pin),
|
||||||
|
.dc_gpio_num = pin_or_unused(config->pin_dc),
|
||||||
|
.spi_mode = 0,
|
||||||
|
.pclk_hz = config->pixel_clock_hz,
|
||||||
|
.trans_queue_depth = config->transaction_queue_depth,
|
||||||
|
.on_color_trans_done = on_color_trans_done,
|
||||||
|
.user_ctx = internal,
|
||||||
|
.lcd_cmd_bits = 8,
|
||||||
|
.lcd_param_bits = 8,
|
||||||
|
.cs_ena_pretrans = 0,
|
||||||
|
.cs_ena_posttrans = 0,
|
||||||
|
.flags = {
|
||||||
|
.dc_high_on_cmd = 0,
|
||||||
|
.dc_low_on_data = 0,
|
||||||
|
.dc_low_on_param = 0,
|
||||||
|
.octal_mode = 0,
|
||||||
|
.quad_mode = 0,
|
||||||
|
.sio_mode = 1,
|
||||||
|
.lsb_first = 0,
|
||||||
|
.cs_high_active = 0,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
esp_err_t ret = esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)spi_config->host, &io_config, &internal->io_handle);
|
||||||
|
if (ret != ESP_OK) {
|
||||||
|
LOG_E(TAG, "Failed to create panel IO: %s", esp_err_to_name(ret));
|
||||||
|
vSemaphoreDelete(internal->draw_done_semaphore);
|
||||||
|
free(internal);
|
||||||
|
return ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
esp_lcd_panel_dev_config_t panel_config = {
|
||||||
|
.reset_gpio_num = pin_or_unused(config->pin_reset),
|
||||||
|
.rgb_ele_order = config->bgr_order ? LCD_RGB_ELEMENT_ORDER_BGR : LCD_RGB_ELEMENT_ORDER_RGB,
|
||||||
|
.data_endian = LCD_RGB_DATA_ENDIAN_LITTLE,
|
||||||
|
.bits_per_pixel = config->bits_per_pixel,
|
||||||
|
.flags = { .reset_active_high = config->reset_active_high },
|
||||||
|
.vendor_config = nullptr,
|
||||||
|
};
|
||||||
|
|
||||||
|
ret = esp_lcd_new_panel_st7796(internal->io_handle, &panel_config, &internal->panel_handle);
|
||||||
|
if (ret != ESP_OK) {
|
||||||
|
LOG_E(TAG, "Failed to create panel: %s", esp_err_to_name(ret));
|
||||||
|
esp_lcd_panel_io_del(internal->io_handle);
|
||||||
|
vSemaphoreDelete(internal->draw_done_semaphore);
|
||||||
|
free(internal);
|
||||||
|
return ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Bring-up sequence, order matches EspLcdDisplayV2::applyConfiguration (proven correct on real ST7796 panels).
|
||||||
|
// Every failure path below must clean up fully: unlike stop_device, this is never retried by the kernel
|
||||||
|
// if start_device fails (see device_start() in TactilityKernel), so a partial failure here would leak.
|
||||||
|
bool ok =
|
||||||
|
esp_lcd_panel_reset(internal->panel_handle) == ESP_OK &&
|
||||||
|
esp_lcd_panel_init(internal->panel_handle) == ESP_OK &&
|
||||||
|
(!config->invert_color || esp_lcd_panel_invert_color(internal->panel_handle, true) == ESP_OK);
|
||||||
|
|
||||||
|
if (ok) {
|
||||||
|
int gap_x = config->swap_xy ? config->gap_y : config->gap_x;
|
||||||
|
int gap_y = config->swap_xy ? config->gap_x : config->gap_y;
|
||||||
|
ok = (gap_x == 0 && gap_y == 0) || esp_lcd_panel_set_gap(internal->panel_handle, gap_x, gap_y) == ESP_OK;
|
||||||
|
}
|
||||||
|
ok = ok && (!config->swap_xy || esp_lcd_panel_swap_xy(internal->panel_handle, true) == ESP_OK);
|
||||||
|
ok = ok && ((!config->mirror_x && !config->mirror_y) || esp_lcd_panel_mirror(internal->panel_handle, config->mirror_x, config->mirror_y) == ESP_OK);
|
||||||
|
ok = ok && (!config->invert_color || esp_lcd_panel_invert_color(internal->panel_handle, true) == ESP_OK);
|
||||||
|
ok = ok && (config->gamma_curve >= 4 || esp_lcd_panel_io_tx_param(internal->io_handle, LCD_CMD_GAMSET, &GAMMA_CURVE_VALUES[config->gamma_curve], 1) == ESP_OK);
|
||||||
|
ok = ok && esp_lcd_panel_disp_on_off(internal->panel_handle, true) == ESP_OK;
|
||||||
|
|
||||||
|
if (!ok) {
|
||||||
|
LOG_E(TAG, "Failed to bring up panel");
|
||||||
|
esp_lcd_panel_del(internal->panel_handle);
|
||||||
|
esp_lcd_panel_io_del(internal->io_handle);
|
||||||
|
vSemaphoreDelete(internal->draw_done_semaphore);
|
||||||
|
free(internal);
|
||||||
|
return ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
device_set_driver_data(device, internal);
|
||||||
|
return ERROR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t stop(Device* device) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
|
||||||
|
error_t result = ERROR_NONE;
|
||||||
|
|
||||||
|
if (esp_lcd_panel_del(internal->panel_handle) != ESP_OK) {
|
||||||
|
LOG_E(TAG, "Failed to delete panel");
|
||||||
|
result = ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
if (esp_lcd_panel_io_del(internal->io_handle) != ESP_OK) {
|
||||||
|
LOG_E(TAG, "Failed to delete panel IO");
|
||||||
|
result = ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
vSemaphoreDelete(internal->draw_done_semaphore);
|
||||||
|
free(internal);
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
// endregion
|
||||||
|
|
||||||
|
// region DisplayApi
|
||||||
|
|
||||||
|
static error_t st7796_reset(Device* device) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_reset(internal->panel_handle) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_init(Device* device) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_init(internal->panel_handle) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_draw_bitmap(Device* device, int32_t x_start, int32_t y_start, int32_t x_end, int32_t y_end, const void* color_data) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
|
||||||
|
// Drain any stale signal left over from a prior non-draw transaction (bring-up commands like
|
||||||
|
// reset/gap also complete through on_color_trans_done), so the take() below can only be
|
||||||
|
// satisfied by this draw's own transfer completing.
|
||||||
|
xSemaphoreTake(internal->draw_done_semaphore, 0);
|
||||||
|
|
||||||
|
if (esp_lcd_panel_draw_bitmap(internal->panel_handle, x_start, y_start, x_end, y_end, color_data) != ESP_OK) {
|
||||||
|
return ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Block until the SPI transfer physically completes: DisplayApi's draw_bitmap is a synchronous
|
||||||
|
// contract (see lvgl_display.c), so the caller must be able to safely reuse/overwrite
|
||||||
|
// color_data as soon as this call returns. esp_lcd_panel_draw_bitmap() only queues the
|
||||||
|
// transfer and returns once it's handed to the SPI peripheral, not once it's finished.
|
||||||
|
xSemaphoreTake(internal->draw_done_semaphore, portMAX_DELAY);
|
||||||
|
return ERROR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_mirror(Device* device, bool x_axis, bool y_axis) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_mirror(internal->panel_handle, x_axis, y_axis) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_swap_xy(Device* device, bool swap_axes) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_swap_xy(internal->panel_handle, swap_axes) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Reads the devicetree-configured baseline, not live hardware state: swap_xy()/mirror() calls made after
|
||||||
|
// start_device() (e.g. by an LVGL rotation binding) intentionally don't change what "rotation 0" means here.
|
||||||
|
static bool st7796_get_swap_xy(Device* device) {
|
||||||
|
return GET_CONFIG(device)->swap_xy;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool st7796_get_mirror_x(Device* device) {
|
||||||
|
return GET_CONFIG(device)->mirror_x;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool st7796_get_mirror_y(Device* device) {
|
||||||
|
return GET_CONFIG(device)->mirror_y;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_set_gap(Device* device, int32_t x_gap, int32_t y_gap) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_set_gap(internal->panel_handle, x_gap, y_gap) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_invert_color(Device* device, bool invert_color_data) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_invert_color(internal->panel_handle, invert_color_data) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_disp_on_off(Device* device, bool on_off) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_disp_on_off(internal->panel_handle, on_off) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_disp_sleep(Device* device, bool sleep) {
|
||||||
|
auto* internal = static_cast<St7796Internal*>(device_get_driver_data(device));
|
||||||
|
return esp_lcd_panel_disp_sleep(internal->panel_handle, sleep) == ESP_OK ? ERROR_NONE : ERROR_RESOURCE;
|
||||||
|
}
|
||||||
|
|
||||||
|
// bgr_order only selects the panel controller's rgb_ele_order (applied in start(), above) so the
|
||||||
|
// R/B swap happens in hardware over SPI. LVGL always fills RGB565 buffers either way - it has no
|
||||||
|
// BGR565 format (lvgl_display.c rejects it, "no LVGL equivalent"), and none is needed here.
|
||||||
|
//
|
||||||
|
// _SWAPPED (not plain RGB565): the panel expects each 16-bit pixel high-byte-first over SPI, but
|
||||||
|
// this CPU is little-endian, so a plain RGB565 buffer arrives byte-swapped per pixel. The old
|
||||||
|
// deprecated-HAL driver had the same requirement (its equivalent knob was esp_lvgl_port's
|
||||||
|
// `swap_bytes = true` in Devices/cyd-3248s035c/Source/devices/Display.cpp).
|
||||||
|
static enum DisplayColorFormat st7796_get_color_format(Device*) {
|
||||||
|
return DISPLAY_COLOR_FORMAT_RGB565_SWAPPED;
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint16_t st7796_get_resolution_x(Device* device) {
|
||||||
|
return GET_CONFIG(device)->horizontal_resolution;
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint16_t st7796_get_resolution_y(Device* device) {
|
||||||
|
return GET_CONFIG(device)->vertical_resolution;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void st7796_get_frame_buffer(Device*, uint8_t, void** out_buffer) {
|
||||||
|
*out_buffer = nullptr;
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint8_t st7796_get_frame_buffer_count(Device*) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static error_t st7796_get_backlight(Device* device, Device** backlight) {
|
||||||
|
auto* configured_backlight = GET_CONFIG(device)->backlight;
|
||||||
|
if (configured_backlight == nullptr) {
|
||||||
|
return ERROR_NOT_SUPPORTED;
|
||||||
|
}
|
||||||
|
*backlight = configured_backlight;
|
||||||
|
return ERROR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
// endregion
|
||||||
|
|
||||||
|
static const DisplayApi st7796_display_api = {
|
||||||
|
.capabilities = DISPLAY_CAPABILITY_CAP_MIRROR | DISPLAY_CAPABILITY_CAP_SWAP_XY |
|
||||||
|
DISPLAY_CAPABILITY_CAP_SET_GAP | DISPLAY_CAPABILITY_INVERT_COLOR | DISPLAY_CAPABILITY_ON_OFF |
|
||||||
|
DISPLAY_CAPABILITY_SLEEP | DISPLAY_CAPABILITY_BACKLIGHT,
|
||||||
|
.reset = st7796_reset,
|
||||||
|
.init = st7796_init,
|
||||||
|
.draw_bitmap = st7796_draw_bitmap,
|
||||||
|
.mirror = st7796_mirror,
|
||||||
|
.swap_xy = st7796_swap_xy,
|
||||||
|
.get_swap_xy = st7796_get_swap_xy,
|
||||||
|
.get_mirror_x = st7796_get_mirror_x,
|
||||||
|
.get_mirror_y = st7796_get_mirror_y,
|
||||||
|
.set_gap = st7796_set_gap,
|
||||||
|
.invert_color = st7796_invert_color,
|
||||||
|
.disp_on_off = st7796_disp_on_off,
|
||||||
|
.disp_sleep = st7796_disp_sleep,
|
||||||
|
.get_color_format = st7796_get_color_format,
|
||||||
|
.get_resolution_x = st7796_get_resolution_x,
|
||||||
|
.get_resolution_y = st7796_get_resolution_y,
|
||||||
|
.get_frame_buffer = st7796_get_frame_buffer,
|
||||||
|
.get_frame_buffer_count = st7796_get_frame_buffer_count,
|
||||||
|
.get_backlight = st7796_get_backlight,
|
||||||
|
.has_capability = nullptr,
|
||||||
|
};
|
||||||
|
|
||||||
|
Driver st7796_driver = {
|
||||||
|
.name = "st7796",
|
||||||
|
.compatible = (const char*[]) { "sitronix,st7796", nullptr },
|
||||||
|
.start_device = start,
|
||||||
|
.stop_device = stop,
|
||||||
|
.api = &st7796_display_api,
|
||||||
|
.device_type = &DISPLAY_TYPE,
|
||||||
|
.owner = &st7796_module,
|
||||||
|
.internal = nullptr
|
||||||
|
};
|
||||||
Loading…
x
Reference in New Issue
Block a user