Add first pass of SPI LCD logic

2025-12-05 23:34:42 -05:00
parent 33314d2a4a
commit 1763303f3c
54 changed files with 3422 additions and 1 deletions
@@ -8,9 +8,18 @@

 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
+
 #include "esp_log.h"
 #include "driver/rmt_tx.h"
 #include "driver/uart.h"
+#include "driver/gpio.h"
+
+#include "hal/spi_types.h"
+#include "esp_lcd_panel_ops.h"
+#include "driver/spi_common.h"
+#include "esp_lcd_panel_io.h"
+#include "esp_lcd_ili9341.h"
+
 #include "dshot_esc_encoder.h"

 #if CONFIG_IDF_TARGET_ESP32H2
@@ -18,9 +27,20 @@
 #else
 #define DSHOT_ESC_RESOLUTION_HZ 40000000 // 40MHz resolution, DSHot protocol needs a relative high resolution
 #endif
+
 #define GPIO_ESC_CTRL CONFIG_ESC_CTRL_PIN
 #define GPIO_ESC_RX   CONFIG_TELEMETRY_RX_PIN
 #define UART_NUM      UART_NUM_2
+#define LCD_SPI_HOST  SPI2_HOST
+
+#define GPIO_TFT_MISO CONFIG_TFT_MISO_PIN
+#define GPIO_TFT_MOSI CONFIG_TFT_MOSI_PIN
+#define GPIO_TFT_SCKL CONFIG_TFT_SCKL_PIN
+#define GPIO_TFT_CS   CONFIG_TFT_CS_PIN
+#define GPIO_TFT_DC   CONFIG_TFT_DC_PIN
+#define GPIO_TFT_BL   CONFIG_TFT_BL_PIN // Backlight
+#define TFT_HRES      CONFIG_TFT_HRES
+#define TFT_VRES      CONFIG_TFT_VRES

 #define ESP_INTR_FLAG_DEFAULT        0

@@ -117,6 +137,58 @@ void init_telemetry_uart_rx(void) {
    ESP_ERROR_CHECK(uart_set_pin(UART_NUM, UART_PIN_NO_CHANGE, GPIO_ESC_RX, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
 }

+void spi_lcd_transfer_done(void) {
+    return;
+}
+
+void init_spi_lcd(void) {
+    ESP_LOGI(TAG, "Initialize SPI bus");
+    // TODO might need to replace with another config var
+    const spi_bus_config_t bus_config = ILI9341_PANEL_BUS_SPI_CONFIG(GPIO_TFT_SCKL,
+                                                                     GPIO_TFT_MOSI,
+                                                                     TFT_HRES * TFT_VRES * sizeof(uint16_t));
+    ESP_ERROR_CHECK(spi_bus_initialize(LCD_SPI_HOST, &bus_config, SPI_DMA_CH_AUTO));
+    
+    ESP_LOGI(TAG, "Install panel IO");
+    esp_lcd_panel_io_handle_t io_handle = NULL;
+    const esp_lcd_panel_io_spi_config_t io_config = ILI9341_PANEL_IO_SPI_CONFIG(GPIO_TFT_CS, GPIO_TFT_DC,
+                                                                                NULL, NULL);
+    
+    ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)LCD_SPI_HOST, &io_config, &io_handle));
+    
+    ESP_LOGI(TAG, "Install ILI9341 panel driver");
+    esp_lcd_panel_handle_t panel_handle = NULL;
+    const esp_lcd_panel_dev_config_t panel_config = {
+        .reset_gpio_num = -1,
+        .rgb_ele_order  = LCD_RGB_ELEMENT_ORDER_RGB,
+        .bits_per_pixel = 16,
+    };
+    
+    ESP_ERROR_CHECK(esp_lcd_new_panel_ili9341(io_handle, &panel_config, &panel_handle));
+    ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
+    ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));
+    ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));
+    
+    ESP_LOGI(TAG, "Turning on backlight");
+    printf("Configured pin is reported as %d\n", CONFIG_TFT_BL_PIN);
+    // TODO: This pin isn't going high. Configure it properly.
+    
+    gpio_config_t io_conf = {
+        .pin_bit_mask = (1ULL << GPIO_TFT_BL),
+        .mode = GPIO_MODE_OUTPUT,
+        .pull_up_en = GPIO_PULLUP_ENABLE,
+        .pull_down_en = GPIO_PULLDOWN_DISABLE,
+        .intr_type = GPIO_INTR_DISABLE
+    };
+    
+    gpio_config(&io_conf);
+    
+    //gpio_reset_pin(GPIO_TFT_BL);
+    //gpio_set_direction(GPIO_TFT_BL, GPIO_MODE_OUTPUT);
+    ESP_ERROR_CHECK(gpio_set_level(GPIO_TFT_BL, 1));
+    ESP_LOGI(TAG, "Finished init of spi LCD.");
+}
+
 /**
 * Sends a DSHOT packet via the RMT. Make sure the RMT channel has been initialized
 * by calling *init_rmt_esc_tx()*
@@ -187,6 +259,8 @@ void parse_telemetry(void) {
 }

 void app_main(void) {
+    init_spi_lcd();
+    
    init_rmt_esc_tx();
    throttle.throttle = 300;