From 6d48d0a10391958123145879aad43cb8d9f7e667 Mon Sep 17 00:00:00 2001
From: impressionyang <impressionyang@outlook.com>
Date: Tue, 11 Jul 2023 08:53:18 +0000
Subject: [PATCH] add lvgl2oled_iic.c.

Signed-off-by: impressionyang <impressionyang@outlook.com>
---
 lvgl2oled_iic.c | 143 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 lvgl2oled_iic.c

diff --git a/lvgl2oled_iic.c b/lvgl2oled_iic.c
new file mode 100644
index 0000000..b4e4794
--- /dev/null
+++ b/lvgl2oled_iic.c
@@ -0,0 +1,143 @@
+#if OLED_IIC_USE_PER_PIXEL_BYTE_FOR_LVGL
+static uint8_t screen_data[64][128] = {0};
+static uint8_t screen_data_line[129] = {0};
+
+static void merge_lvgl_data(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, const uint8_t BMP[])
+{
+    int i = 0, j = 0, bmp_pixel_idx = 0;
+    uint8_t temp = 0;
+    for (i = y0; i <= y1; i++) {
+        for (j = x0; j <= x1; j++) {
+            temp = BMP[bmp_pixel_idx];
+            screen_data[i][j] = temp;
+            bmp_pixel_idx++;
+        }
+    }
+}
+
+static uint8_t tranform_lvgl_line_data_to_oled_data(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1)
+{
+//    if (x0 == x1 || y0 == y1)
+//    {
+////        rt_kprintf("transform a empty %d %d %d %d\r\n", x0, y0, x1, y1);
+////        return 0;
+//    }
+
+    screen_data_line[0] = OLED_I2C_DATA;
+
+    uint8_t data_byte = 0, i = 0, frame_index = 0, temp = 0;
+    frame_index = 1;
+    for (i = x0; i <= x1; i++)
+    {
+        data_byte = 0;
+        temp = screen_data[y0 + 0][i] == 0 ? 0 : 1;
+        data_byte |= temp << 0;
+
+        temp = screen_data[y0 + 1][i] == 0 ? 0 : 1;
+        data_byte |= temp << 1;
+
+        temp = screen_data[y0 + 2][i] == 0 ? 0 : 1;
+        data_byte |= temp << 2;
+
+        temp = screen_data[y0 + 3][i] == 0 ? 0 : 1;
+        data_byte |= temp << 3;
+
+        temp = screen_data[y0 + 4][i] == 0 ? 0 : 1;
+        data_byte |= temp << 4;
+
+        temp = screen_data[y0 + 5][i] == 0 ? 0 : 1;
+        data_byte |= temp << 5;
+
+        temp = screen_data[y0 + 6][i] == 0 ? 0 : 1;
+        data_byte |= temp << 6;
+
+        temp = screen_data[y0 + 7][i] == 0 ? 0 : 1;
+        data_byte |= temp << 7;
+
+        screen_data_line[frame_index++] = data_byte;
+    }
+
+    return frame_index;
+}
+
+static void flush_lvgl_data(i2c_oled_t *handle, uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1)
+{
+    uint8_t y_cut_upper = 0;
+    uint8_t y_cut = 0;
+    uint8_t y_cut_down_lines = 0;
+    uint8_t y_cut_down = 0;
+    uint8_t transform_len = 0;
+    uint8_t i = 0;
+    if (y0 == 0) {
+        y_cut = 0;
+        y_cut_upper = 0;
+    }else if (( (y0 + 1) % 8 ) == 0 ) {
+        y_cut_upper = y0;
+        y_cut = y0;
+    }else {
+        y_cut = ((( (y0 + 1) / 8) + 1 ) * 8);
+        y_cut_upper = ((y_cut / 8) - 1 ) * 8 - 1;
+        y_cut -= 1;
+    }
+
+    if (y1 == y0 ) {
+        y_cut_down == y_cut;
+    }else if (((y1 + 1) % 8) == 0) {
+        y_cut_down = y1;
+    }else {
+        y_cut_down = (((y1 + 1) / 8) + 1) * 8 - 1;
+    }
+    y_cut_down_lines = (y_cut_down - y_cut) / 8;
+
+    if (y_cut != y0) {
+        // flush ycut upper
+        transform_len = tranform_lvgl_line_data_to_oled_data(x0, y_cut_upper, x1, y_cut);
+        OledSetPosition(handle, x0, (y_cut_upper + 1) / 8);
+        handle->i2c_write_func(OLED_I2C_ADDR, screen_data_line, transform_len);
+    }
+
+    for (i = 0; i < y_cut_down_lines; i++) {
+        transform_len = tranform_lvgl_line_data_to_oled_data(x0, y_cut + (i * 8), x1, y_cut + ((i + 1) * 8));
+        OledSetPosition(handle, x0, (y_cut + (i * 8) + 1) / 8);
+
+        handle->i2c_write_func(OLED_I2C_ADDR, screen_data_line, transform_len);
+    }
+}
+
+void OledDrawLVGL(i2c_oled_t *handle, uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, const uint8_t BMP[])
+{
+    if (x1 > 127)
+    {
+        x1 = 127;
+    }
+    if (y1 > 63)
+    {
+        y1 = 63;
+    }
+//    rt_kprintf("finish a loop %d %d %d %d\r\n", x0, y0, x1, y1);
+    merge_lvgl_data(x0, y0, x1, y1, BMP);
+    flush_lvgl_data(handle, x0, y0, x1, y1);
+}
+
+static int finsh_print_screen(int argc, char *argv[])
+{
+    uint8_t i = 0, j = 0, temp = 0;
+    rt_kprintf("\r\n");
+    for (i = 0; i < 64; i++) {
+        for (j = 0; j < 128; j++) {
+            temp = screen_data[i][j];
+            if (temp) {
+                rt_kprintf("%c", ' ');
+            }else{
+                rt_kprintf("%c", '*');
+            }
+        }
+        rt_kprintf("\n");
+    }
+    return 0;
+}
+
+/* 导出到 msh 命令列表中 */
+MSH_CMD_EXPORT(finsh_print_screen, print iic screen data);
+
+#endif
\ No newline at end of file