Initial LCD driver support.

Signed-off-by: Yilin Sun <imi415@imi.moe>

.drone.yml

@@ -14,4 +14,4 @@ steps:
     commands:
       - mkdir build && cd build
       - cmake -DCMAKE_TOOLCHAIN_FILE=arm-none-eabi.cmake ..
-      - make fire_rt1021_evk_template_FLASH.elf
+      - make fire_rt1021_watch_FLASH.elf

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "lib/freertos"]
 	path = lib/freertos
 	url = https://github.com/FreeRTOS/FreeRTOS-Kernel.git
+[submodule "lib/lcd"]
+	path = lib/lcd
+	url = https://git.minori.work/Embedded_Drivers/epd-spi.git

CMakeLists.txt

@@ -90,6 +90,7 @@ set(TARGET_SOURCES
     "board/dcd.c"
     "board/peripherals.c"
     "board/pin_mux.c"
+    "src/app_lcd_impl.c"
     "src/main.c"
     "xip/fire_rt1021_evk_flexspi_nor_config.c"
 )
@@ -125,6 +126,7 @@ set(TARGET_C_INCLUDES
 
 # Shared libraries linked with application
 set(TARGET_LIBS
+    "epd-spi"
     "freertos_kernel"
     "c"
     "m"
@@ -160,6 +162,8 @@ set(FREERTOS_PORT GCC_ARM_CM4F CACHE STRING "")
 set(FREERTOS_HEAP "4" CACHE STRING "")
 add_subdirectory(lib/freertos)
 
+add_subdirectory(lib/lcd)
+
 # Shared sources, includes and definitions
 add_compile_definitions(${TARGET_C_DEFINES})
 include_directories(${TARGET_C_INCLUDES})

MIMXRT1021xxxxx.mex

@@ -163,6 +163,7 @@
                         <pin_feature name="gpio_init_state" value="true"/>
                         <pin_feature name="open_drain" value="Enable"/>
                         <pin_feature name="speed" value="MHZ_50"/>
+                        <pin_feature name="pull_keeper_enable" value="Disable"/>
                      </pin_features>
                   </pin>
                </pins>

board/pin_mux.c

@@ -123,7 +123,8 @@ void BOARD_InitLCDTPPins(void) {
 BOARD_InitLEDPins:
 - options: {callFromInitBoot: 'true', coreID: core0, enableClock: 'true'}
 - pin_list:
-  - {pin_num: '76', peripheral: GPIO1, signal: 'gpio_io, 29', pin_signal: GPIO_AD_B1_13, direction: OUTPUT, gpio_init_state: 'true', open_drain: Enable, speed: MHZ_50}
+  - {pin_num: '76', peripheral: GPIO1, signal: 'gpio_io, 29', pin_signal: GPIO_AD_B1_13, direction: OUTPUT, gpio_init_state: 'true', open_drain: Enable, speed: MHZ_50,
+    pull_keeper_enable: Disable}
  * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
  */
 
@@ -146,7 +147,7 @@ void BOARD_InitLEDPins(void) {
   GPIO_PinInit(GPIO1, 29U, &LEDA_config);
 
   IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B1_13_GPIO1_IO29, 0U); 
-  IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_13_GPIO1_IO29, 0x1830U); 
+  IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_13_GPIO1_IO29, 0x0830U); 
 }
 /***********************************************************************************************************************
  * EOF

include/FreeRTOSConfig.h

@@ -65,7 +65,7 @@
 /* Memory allocation related definitions. */
 #define configSUPPORT_STATIC_ALLOCATION         0
 #define configSUPPORT_DYNAMIC_ALLOCATION        1
-#define configTOTAL_HEAP_SIZE                   ((size_t)(48 * 1024))
+#define configTOTAL_HEAP_SIZE                   ((size_t)(32 * 1024))
 #define configAPPLICATION_ALLOCATED_HEAP        0
 
 /* Hook function related definitions. */

include/app_lcd_impl.h

@@ -0,0 +1,11 @@
+#ifndef APP_LCD_IMPL_H
+#define APP_LCD_IMPL_H
+
+#include "epd-spi/epd_common.h"
+
+int       app_lcd_impl_init(void *handle);
+epd_ret_t app_lcd_impl_write_command(void *handle, uint8_t *command, uint32_t len);
+epd_ret_t app_lcd_impl_write_data(void *handle, const uint8_t *data, uint32_t len);
+epd_ret_t app_lcd_impl_delay(void *handle, uint32_t msec);
+
+#endif  // APP_LCD_IMPL_H

lib/lcd

@@ -0,0 +1 @@
+Subproject commit 9fe29d33414911a8ae6ca0a347d1bd9af05be3b4

src/app_lcd_impl.c

@@ -0,0 +1,79 @@
+/* FreeRTOS */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* SDK drivers */
+#include "fsl_lpspi.h"
+
+/* Board */
+#include "board.h"
+#include "clock_config.h"
+#include "peripherals.h"
+#include "pin_mux.h"
+
+/* LCD */
+#include "app_lcd_impl.h"
+
+int app_lcd_impl_init(void *handle) {
+    CLOCK_EnableClock(kCLOCK_Lpspi4);
+
+    lpspi_master_config_t spi_cfg;
+    LPSPI_MasterGetDefaultConfig(&spi_cfg);
+
+    spi_cfg.baudRate = 24000000UL;
+
+    LPSPI_MasterInit(LPSPI4, &spi_cfg, CLOCK_GetClockRootFreq(kCLOCK_LpspiClkRoot));
+
+    return 0;
+}
+
+epd_ret_t app_lcd_impl_write_command(void *handle, uint8_t *command, uint32_t len) {
+    lpspi_transfer_t xfer = {
+        .txData      = command,
+        .dataSize    = 1U,
+        .configFlags = kLPSPI_MasterPcsContinuous,
+    };
+
+    GPIO_WritePinOutput(BOARD_LCD_DC_GPIO, BOARD_INITLCDSPIPINS_DC_PIN, 0U);
+
+    status_t ret = LPSPI_MasterTransferBlocking(LPSPI4, &xfer);
+    if (ret != kStatus_Success) {
+        return EPD_FAIL;
+    }
+
+    if (len > 1) {
+        GPIO_WritePinOutput(BOARD_LCD_DC_GPIO, BOARD_INITLCDSPIPINS_DC_PIN, 1U);
+        xfer.txData   = &command[1];
+        xfer.dataSize = len - 1;
+
+        ret = LPSPI_MasterTransferBlocking(LPSPI4, &xfer);
+        if (ret != kStatus_Success) {
+            return EPD_FAIL;
+        }
+    }
+
+    return EPD_OK;
+}
+
+epd_ret_t app_lcd_impl_write_data(void *handle, const uint8_t *data, uint32_t len) {
+    lpspi_transfer_t xfer = {
+        .txData      = (uint8_t *)data,
+        .dataSize    = len,
+        .configFlags = kLPSPI_MasterPcsContinuous,
+    };
+
+    GPIO_WritePinOutput(BOARD_LCD_DC_GPIO, BOARD_INITLCDSPIPINS_DC_PIN, 1U);
+
+    status_t ret = LPSPI_MasterTransferBlocking(LPSPI4, &xfer);
+    if (ret != kStatus_Success) {
+        return EPD_FAIL;
+    }
+
+    return EPD_OK;
+}
+
+epd_ret_t app_lcd_impl_delay(void *handle, uint32_t msec) {
+    vTaskDelay(pdMS_TO_TICKS(msec));
+
+    return EPD_OK;
+}

src/main.c

@@ -17,6 +17,14 @@
 #include "FreeRTOS.h"
 #include "task.h"
 
+/* LCD */
+#include "epd-spi/panel/lcd_tk0096f611.h"
+
+/* App */
+#include "app_lcd_impl.h"
+
+static uint16_t s_display_buf[160 * 80];
+
 static void app_task_initialization(void *arguments);
 
 int main(void) {
@@ -40,6 +48,33 @@ dead_loop:
 }
 
 static void app_task_initialization(void *arguments) {
+    lcd_st7789_t lcd = {
+        .cb =
+            {
+                .write_command_cb = app_lcd_impl_write_command,
+                .write_data_cb    = app_lcd_impl_write_data,
+                .delay_cb         = app_lcd_impl_delay,
+            },
+    };
+
+    app_lcd_impl_init(NULL);
+
+    lcd_st7789_init(&lcd, &lcd_tk0096_panel_config);
+    lcd_st7789_set_direction(&lcd, LCD_ST7789_DIR_90);
+    lcd_st7789_set_pixel_format(&lcd, LCD_ST7789_RGB565);
+    lcd_st7789_enable_display(&lcd, true);
+
+    memset(s_display_buf, 0xDD, sizeof(s_display_buf));
+
+    epd_coord_t coord = {
+        .x_start = 0,
+        .x_end   = 159,
+        .y_start = 0,
+        .y_end   = 79,
+    };
+
+    lcd_st7789_load(&lcd, &coord, (const uint8_t *)s_display_buf);
+
     for (;;) {
         GPIO_PortToggle(BOARD_INITLEDPINS_LEDA_GPIO, BOARD_INITLEDPINS_LEDA_PIN_MASK);
         vTaskDelay(pdMS_TO_TICKS(250));