Implemented basic functions.

st7789_lcd.c

@@ -0,0 +1,46 @@
+#include "st7789_lcd.h"
+
+uint8_t ST7789_PANEL_ZJY_240_240[] = {
+    0x05, 0xB2, 0x0C, 0x0C, 0x00, 0x33, 0x33, // Porch Setting
+    0x01, 0xB7, 0x35, // Gate Control
+    0x01, 0xBB, 0x19, // VCOM Setting // Factory 0x19 -> 0.725V
+    0x01, 0xC0, 0x2C, // LCM Control
+    0x01, 0xC2, 0x01, // VDV and VRH Command Enable
+    0x01, 0xC3, 0x12, // VRH Set // Factory 12H
+    0x01, 0xC4, 0x20, // VDV Set
+    0x01, 0xC6, 0x0F, //Frame Rate Control in Normal Mode
+    0x02, 0xD0, 0xA4, 0xA1, // Power Control 1
+    0x0E, 0xE0, 0xD0, 0x04, 0x0D, 0x11, 0x13, 0x2B, 0x3F, 0x54, 0x4C, 0x18, 0x0D, 0x0B, 0x1F,
+    0x23, // Positive Voltage Gamma Control
+    0x0E, 0xE1, 0xD0, 0x04, 0x0C, 0x11, 0x13, 0x2C, 0x3F, 0x44, 0x51, 0x2F, 0x1F, 0x1F, 0x20,
+    0x23, // Negative Voltage Gamma Control
+    0x00, 0x21, // Inversion On
+};
+
+st7789_ret_t _st7789_init_seq(st7789_lcd_t *lcd) {
+    uint16_t i = 0;
+
+    while(i < sizeof(ST7789_PANEL_SELECTION)) {
+        if(lcd->cb.write_cmd_cb(lcd->user_data, &ST7789_PANEL_SELECTION[i + 1], ST7789_PANEL_SELECTION[i] + 1) != ST7789_OK) {
+            return ST7789_ERROR;
+        };
+        i += ST7789_PANEL_SELECTION[i] + 2;
+    }
+}
+
+st7789_ret_t _st7789_window(st7789_lcd_t *lcd, uint16_t x_start, uint16_t x_end, uint16_t y_start, uint16_t y_end) {
+    // Cursor
+}
+
+st7789_ret_t st7789_lcd_init(st7789_lcd_t *lcd) {
+    if(_st7789_init_seq(lcd) != ST7789_OK) return ST7789_ERROR;
+}
+
+st7789_ret_t st7789_lcd_load(st7789_lcd_t *lcd, uint8_t *data, uint16_t x_start, uint16_t x_end, uint16_t y_start, uint16_t y_end) {
+    uint32_t data_len = (y_end - y_start + 1) * (x_end - x_start + 1);
+
+    if(_st7789_window(lcd, x_start, x_end, y_start, y_end) != ST7789_OK) return ST7789_ERROR;
+    if(lcd->cb.write_data_cb(lcd->user_data, data, data_len) != ST7789_OK) return ST7789_ERROR;
+
+    return ST7789_OK;
+}

st7789_lcd.h

@@ -0,0 +1,29 @@
+#ifndef __ST7789_LCD_H
+#define __ST7789_LCD_H
+
+#include <stdint.h>
+
+typedef enum {
+    ST7789_OK,
+    ST7789_ERROR
+} st7789_ret_t;
+
+typedef struct {
+    st7789_ret_t (*reset_cb)(void *handle);
+    st7789_ret_t (*write_cmd_cb)(void *handle, uint8_t *cmd, uint8_t len);
+    st7789_ret_t (*write_data_cb)(void *handle, uint8_t *data, uint8_t len);
+} st7789_cb_t;
+
+typedef struct {
+    void *user_data;
+    st7789_cb_t cb;
+} st7789_lcd_t;
+
+#ifndef ST7789_PANEL_SELECTION
+#define ST7789_PANEL_SELECTION ST7789_PANEL_ZJY_240_240
+#endif
+
+st7789_ret_t st7789_lcd_init(st7789_lcd_t *lcd);
+st7789_ret_t st7789_lcd_load(st7789_lcd_t *lcd, uint8_t *data, uint16_t x_start, uint16_t x_end, uint16_t y_start, uint16_t y_end);
+
+#endif