256 lines
7.8 KiB
C
256 lines
7.8 KiB
C
|
#include <inttypes.h>
|
||
|
|
||
|
#include "sdkconfig.h"
|
||
|
#include "freertos/FreeRTOS.h"
|
||
|
#include "freertos/task.h"
|
||
|
|
||
|
#include "esp_err.h"
|
||
|
#include "esp_log.h"
|
||
|
#include "esp_timer.h"
|
||
|
#include "esp_lcd_panel_ops.h"
|
||
|
#include "esp_lcd_panel_rgb.h"
|
||
|
#include "driver/i2c_master.h"
|
||
|
|
||
|
#include "esp_lcd_touch_gt911.h"
|
||
|
#include "lvgl.h"
|
||
|
|
||
|
#include "common.h"
|
||
|
#include "lcd.h"
|
||
|
|
||
|
#define LCD_PIXEL_SIZE 2
|
||
|
|
||
|
// in ms
|
||
|
#define LVGL_TICK_PERIOD 2
|
||
|
#define LVGL_TASK_MAX_DELAY 500
|
||
|
#define LVGL_TASK_MIN_DELAY 1
|
||
|
#define LVGL_TASK_PRIORITY 2
|
||
|
#define LVGL_TASK_STACK_SIZE (8 * 1024)
|
||
|
|
||
|
static const char *TAG = "valconomy-lcd";
|
||
|
|
||
|
// LVGL library is not thread-safe, we will call LVGL APIs from different tasks, so use a mutex to protect it
|
||
|
static SemaphoreHandle_t lvgl_mtx = NULL;
|
||
|
|
||
|
static bool val_on_vsync(esp_lcd_panel_handle_t panel, const esp_lcd_rgb_panel_event_data_t *event_data, void *user_ctx) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
static void val_lvgl_flush_cb(lv_display_t *disp, const lv_area_t *area, uint8_t *px_map) {
|
||
|
esp_lcd_panel_handle_t panel_handle = lv_display_get_user_data(disp);
|
||
|
// pass the draw buffer to the driver
|
||
|
esp_lcd_panel_draw_bitmap(panel_handle, area->x1, area->y1, area->x2 + 1, area->y2 + 1, px_map);
|
||
|
lv_disp_flush_ready(disp);
|
||
|
}
|
||
|
|
||
|
static void val_increase_lvgl_tick(void *arg) {
|
||
|
/* Tell LVGL how many milliseconds has elapsed */
|
||
|
lv_tick_inc(LVGL_TICK_PERIOD);
|
||
|
}
|
||
|
|
||
|
static void val_lvgl_port_task(void *arg) {
|
||
|
ESP_LOGI(TAG, "Starting LVGL task");
|
||
|
uint32_t task_delay_ms = LVGL_TASK_MAX_DELAY;
|
||
|
while (1) {
|
||
|
// Lock the mutex due to the LVGL APIs are not thread-safe
|
||
|
if (val_lvgl_lock(-1)) {
|
||
|
task_delay_ms = lv_timer_handler();
|
||
|
// Release the mutex
|
||
|
val_lvgl_unlock();
|
||
|
}
|
||
|
|
||
|
if (task_delay_ms > LVGL_TASK_MAX_DELAY) {
|
||
|
task_delay_ms = LVGL_TASK_MAX_DELAY;
|
||
|
} else if (task_delay_ms < LVGL_TASK_MIN_DELAY) {
|
||
|
task_delay_ms = LVGL_TASK_MIN_DELAY;
|
||
|
}
|
||
|
vTaskDelay(pdMS_TO_TICKS(task_delay_ms));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void val_lvgl_touch_read(lv_indev_t *indev, lv_indev_data_t *data) {
|
||
|
uint16_t touchpad_x[1] = {0};
|
||
|
uint16_t touchpad_y[1] = {0};
|
||
|
uint8_t touchpad_cnt = 0;
|
||
|
|
||
|
// Read touch controller data
|
||
|
esp_lcd_touch_handle_t touch_panel = lv_indev_get_user_data(indev);
|
||
|
esp_lcd_touch_read_data(touch_panel);
|
||
|
|
||
|
// Get coordinates
|
||
|
bool touchpad_pressed = esp_lcd_touch_get_coordinates(touch_panel, touchpad_x, touchpad_y, NULL, &touchpad_cnt, 1);
|
||
|
|
||
|
if (touchpad_pressed && touchpad_cnt > 0) {
|
||
|
data->point.x = touchpad_x[0];
|
||
|
data->point.y = touchpad_y[0];
|
||
|
data->state = LV_INDEV_STATE_PR;
|
||
|
} else {
|
||
|
data->state = LV_INDEV_STATE_REL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
bool val_lvgl_lock(int timeout_ms) {
|
||
|
// Convert timeout in milliseconds to FreeRTOS ticks
|
||
|
// If `timeout_ms` is set to -1, the program will block until the condition is met
|
||
|
const TickType_t timeout_ticks = (timeout_ms == -1) ? portMAX_DELAY : pdMS_TO_TICKS(timeout_ms);
|
||
|
return xSemaphoreTakeRecursive(lvgl_mtx, timeout_ticks) == pdTRUE;
|
||
|
}
|
||
|
|
||
|
void val_lvgl_unlock(void) {
|
||
|
xSemaphoreGiveRecursive(lvgl_mtx);
|
||
|
}
|
||
|
|
||
|
esp_lcd_touch_handle_t val_setup_touch(void) {
|
||
|
ESP_LOGI(TAG, "Install touch panel driver");
|
||
|
esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT911_CONFIG();
|
||
|
io_config.scl_speed_hz = SCL_SPEED;
|
||
|
esp_lcd_panel_io_handle_t io_handle = NULL;
|
||
|
ESP_ERROR_CHECK(esp_lcd_new_panel_io_i2c(i2c_bus_handle, &io_config, &io_handle));
|
||
|
|
||
|
esp_lcd_touch_io_gt911_config_t gt911_config = {
|
||
|
.dev_addr = io_config.dev_addr,
|
||
|
};
|
||
|
|
||
|
esp_lcd_touch_config_t tp_cfg = {
|
||
|
.x_max = LCD_HRES,
|
||
|
.y_max = LCD_VRES,
|
||
|
.rst_gpio_num = -1,
|
||
|
.int_gpio_num = 4,
|
||
|
.levels = {
|
||
|
.reset = 0,
|
||
|
.interrupt = 0,
|
||
|
},
|
||
|
.flags = {
|
||
|
.swap_xy = 0,
|
||
|
.mirror_x = 0,
|
||
|
.mirror_y = 0,
|
||
|
},
|
||
|
.driver_data = >911_config,
|
||
|
};
|
||
|
|
||
|
esp_lcd_touch_handle_t tp;
|
||
|
ESP_ERROR_CHECK(esp_lcd_touch_new_i2c_gt911(io_handle, &tp_cfg, &tp));
|
||
|
return tp;
|
||
|
}
|
||
|
|
||
|
esp_lcd_panel_handle_t val_setup_lcd(void) {
|
||
|
uint8_t i2c_b;
|
||
|
i2c_b = 0x01; // Output enable
|
||
|
ESP_ERROR_CHECK(i2c_master_transmit(exio_cfg_handle, &i2c_b, 1, -1));
|
||
|
|
||
|
i2c_b = 0x00; // Reset everything
|
||
|
ESP_ERROR_CHECK(i2c_master_transmit(exio_o_handle, &i2c_b, 1, -1));
|
||
|
vTaskDelay(pdMS_TO_TICKS(10));
|
||
|
i2c_b = 0x0c; // Pull LCD + touch out of reset
|
||
|
ESP_ERROR_CHECK(i2c_master_transmit(exio_o_handle, &i2c_b, 1, -1));
|
||
|
vTaskDelay(pdMS_TO_TICKS(100));
|
||
|
|
||
|
ESP_LOGI(TAG, "Install RGB LCD panel driver");
|
||
|
esp_lcd_panel_handle_t panel_handle = NULL;
|
||
|
esp_lcd_rgb_panel_config_t panel_config = {
|
||
|
.data_width = 16, // RGB565
|
||
|
.psram_trans_align = 64,
|
||
|
.num_fbs = 2,
|
||
|
|
||
|
.clk_src = LCD_CLK_SRC_DEFAULT,
|
||
|
.disp_gpio_num = -1, // Only accessible via GPIO expander
|
||
|
.pclk_gpio_num = 7,
|
||
|
.vsync_gpio_num = 3,
|
||
|
.hsync_gpio_num = 46,
|
||
|
.de_gpio_num = 5,
|
||
|
.data_gpio_nums = {
|
||
|
14, // B3
|
||
|
38, // B4
|
||
|
18, // B5
|
||
|
17, // B6
|
||
|
10, // B7
|
||
|
39, // G2
|
||
|
0, // G3
|
||
|
45, // G4
|
||
|
48, // G5
|
||
|
47, // G6
|
||
|
21, // G7
|
||
|
1, // R3
|
||
|
2, // R4
|
||
|
42, // R5
|
||
|
41, // R6
|
||
|
40, // R7
|
||
|
},
|
||
|
.timings = {
|
||
|
.pclk_hz = 18 * 1000 * 1000, // 18000000 / (hs+hbp+hfp+hres) / (vs+vbp+hfp+vres) = ~42Hz
|
||
|
.h_res = LCD_HRES,
|
||
|
.v_res = LCD_VRES,
|
||
|
.hsync_back_porch = 8,
|
||
|
.hsync_front_porch = 8,
|
||
|
.hsync_pulse_width = 4,
|
||
|
.vsync_back_porch = 16,
|
||
|
.vsync_front_porch = 16,
|
||
|
.vsync_pulse_width = 4,
|
||
|
.flags = {
|
||
|
.pclk_active_neg = true,
|
||
|
},
|
||
|
},
|
||
|
.flags.fb_in_psram = true, // allocate frame buffer in PSRAM
|
||
|
};
|
||
|
ESP_ERROR_CHECK(esp_lcd_new_rgb_panel(&panel_config, &panel_handle));
|
||
|
|
||
|
ESP_LOGI(TAG, "Initialize RGB LCD panel");
|
||
|
ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
|
||
|
ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
|
||
|
|
||
|
ESP_LOGI(TAG, "Turn on LCD backlight");
|
||
|
i2c_b = 0x0e; // LCD + touch out of reset, backlight on
|
||
|
ESP_ERROR_CHECK(i2c_master_transmit(exio_o_handle, &i2c_b, 1, -1));
|
||
|
|
||
|
return panel_handle;
|
||
|
}
|
||
|
|
||
|
lv_display_t *val_setup_lvgl(esp_lcd_panel_handle_t lcd_panel, esp_lcd_touch_handle_t touch_panel) {
|
||
|
ESP_LOGI(TAG, "Initialize LVGL library");
|
||
|
lv_init();
|
||
|
// create a lvgl display
|
||
|
lv_display_t *display = lv_display_create(LCD_HRES, LCD_VRES);
|
||
|
// associate the rgb panel handle to the display
|
||
|
lv_display_set_user_data(display, lcd_panel);
|
||
|
// set color depth
|
||
|
lv_display_set_color_format(display, LV_COLOR_FORMAT_RGB565);
|
||
|
|
||
|
// create draw buffers
|
||
|
void *buf1 = NULL;
|
||
|
void *buf2 = NULL;
|
||
|
ESP_LOGI(TAG, "Use frame buffers as LVGL draw buffers");
|
||
|
ESP_ERROR_CHECK(esp_lcd_rgb_panel_get_frame_buffer(lcd_panel, 2, &buf1, &buf2));
|
||
|
// set LVGL draw buffers and direct mode
|
||
|
lv_display_set_buffers(display, buf1, buf2, LCD_HRES * LCD_VRES * LCD_PIXEL_SIZE, LV_DISPLAY_RENDER_MODE_DIRECT);
|
||
|
|
||
|
// set the callback which can copy the rendered image to an area of the display
|
||
|
lv_display_set_flush_cb(display, val_lvgl_flush_cb);
|
||
|
|
||
|
ESP_LOGI(TAG, "Register event callbacks");
|
||
|
esp_lcd_rgb_panel_event_callbacks_t cbs = {
|
||
|
.on_vsync = val_on_vsync,
|
||
|
};
|
||
|
ESP_ERROR_CHECK(esp_lcd_rgb_panel_register_event_callbacks(lcd_panel, &cbs, display));
|
||
|
|
||
|
lv_indev_t *indev = lv_indev_create();
|
||
|
lv_indev_set_user_data(indev, touch_panel);
|
||
|
lv_indev_set_type(indev, LV_INDEV_TYPE_POINTER);
|
||
|
lv_indev_set_read_cb(indev, val_lvgl_touch_read);
|
||
|
|
||
|
ESP_LOGI(TAG, "Install LVGL tick timer");
|
||
|
// Tick interface for LVGL (using esp_timer to generate 2ms periodic event)
|
||
|
const esp_timer_create_args_t lvgl_tick_timer_args = {
|
||
|
.callback = &val_increase_lvgl_tick,
|
||
|
.name = "lvgl_tick"
|
||
|
};
|
||
|
esp_timer_handle_t lvgl_tick_timer = NULL;
|
||
|
ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer));
|
||
|
ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_timer, LVGL_TICK_PERIOD * 1000));
|
||
|
|
||
|
lvgl_mtx = xSemaphoreCreateRecursiveMutex();
|
||
|
assert(lvgl_mtx);
|
||
|
ESP_LOGI(TAG, "Create LVGL task");
|
||
|
xTaskCreate(val_lvgl_port_task, "LVGL", LVGL_TASK_STACK_SIZE, NULL, LVGL_TASK_PRIORITY, NULL);
|
||
|
|
||
|
return display;
|
||
|
}
|