Initial commit.

CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.12)
+
+project(epd_lvgl C)
+
+set(CMAKE_C_STANDARD 11)
+
+set(SOURCES
+    main.c
+    lib/gdew0213m21/gdew0213m21_epd.c
+)
+
+include_directories(
+    lib/gdew0213m21
+)
+
+add_executable(epd_lvgl ${SOURCES})

lib/gdew0213m21/gdew0213m21_epd.c

@@ -0,0 +1,35 @@
+#include "gdew0213m21_epd.h"
+
+uint8_t gdew0213m21_init_sequence[] = {
+    0x03, 0x06, 0x17, 0x17, 0x1F, // boost soft start
+    0x04, 0x01, 0x03, 0x00, 0x2B, 0x2B, // Power settings
+    0x01, 0x00, 0xBF, // Panel setting, LUT from OTP
+    0x01, 0x30, 0x3C,
+    0x03, 0x61, 0x68, 0x00, 0xD4,
+    0x01, 0x82, 0x12, // VCOM DC settings
+    0x01, 0x50, 0x47
+};
+
+des_epd_ret_t _des_epd_hardware_reset(des_epd_t *epd) {
+    //
+}
+
+des_epd_ret_t _des_epd_software_reset(des_epd_t *epd) {
+    //
+}
+
+des_epd_ret_t _des_epd_init_seq(des_epd_t *epd) {
+   uint16_t i = 0;
+    while(i < sizeof(DES_EPD_PANEL_SELECTION)) {
+        DES_EPD_ERROR_CHECK(epd->cb.write_cmd_cb(epd->user_data, &DES_EPD_PANEL_SELECTION[i + 1], DES_EPD_PANEL_SELECTION[i] + 1));
+        i += DES_EPD_PANEL_SELECTION[i] + 2;
+    }
+
+    return DES_EPD_OK;
+}
+
+des_epd_ret_t des_epd_init(des_epd_t *epd) {
+    DES_EPD_ERROR_CHECK(_des_epd_init_seq(epd));
+
+    return DES_EPD_OK;
+}

lib/gdew0213m21/gdew0213m21_epd.h

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+#ifndef __GDEW0213M21_EPD_H
+#define __GDEW0213M21_EPD_H
+#include <stdint.h>
+
+#define DES_EPD_PANEL_SELECTION gdew0213m21_init_sequence
+
+typedef enum {
+    DES_EPD_OK,
+    DES_EPD_ERROR
+} des_epd_ret_t;
+
+typedef struct {
+    des_epd_ret_t (*write_cmd_cb)(void *handle, uint8_t *cmd, uint8_t len);
+    des_epd_ret_t (*write_data_cb)(void *handle, uint8_t *data, uint16_t len);
+    des_epd_ret_t (*reset_cb)(void *handle);
+    des_epd_ret_t (*check_busy_cb)(void *handle);
+} des_epd_cb_t;
+
+typedef struct {
+    void *user_data;
+    des_epd_cb_t cb;
+} des_epd_t;
+
+#define DES_EPD_ERROR_CHECK(x) if(x != DES_EPD_OK) return DES_EPD_ERROR
+
+des_epd_ret_t des_epd_init(des_epd_t *epd);
+
+#endif

main.c

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+#include <stdio.h>
+
+#include "gdew0213m21_epd.h"
+
+int main() {
+    printf("Hello World!\n");
+    return 0;
+}