lvgl/ssd1306: Add support for page addressing

Only horizontal addressing mode was supported. There are many variants that only work with page addressing mode. Now addressing mode can be changed to page (which is less efficient from I2C point of view). Signed-off-by: Jerzy Kasenberg <[email protected]>
apache · Nov 3, 2023 · 95deb08 · 95deb08
1 parent 348d9a1
commit 95deb08
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Showing 2 changed files with 41 additions and 1 deletion.
diff --git a/hw/drivers/display/lvgl/oled/ssd1306/src/ssd1306.c b/hw/drivers/display/lvgl/oled/ssd1306/src/ssd1306.c
@@ -115,6 +115,12 @@
 #define SSD1306_PANEL_VCOM_DESEL_LEVEL          0x20
 #define SSD1306_PANEL_PUMP_VOLTAGE              SSD1306_SET_PUMP_VOLTAGE_90
 
+#if MYNEWT_VAL_CHOICE(SSD1306_ADDRESSING_MODE, horizontal)
+#define ADDRESSING_MODE SSD1306_SET_MEM_ADDRESSING_HORIZONTAL
+#else
+#define ADDRESSING_MODE SSD1306_SET_MEM_ADDRESSING_PAGE
+#endif
+
 LCD_SEQUENCE(init_cmds)
     LCD_SEQUENCE_LCD_CS_INACTIVATE(),
     LCD_SEQUENCE_LCD_DC_DATA(),
@@ -125,7 +131,7 @@ LCD_SEQUENCE(init_cmds)
     2, SSD1306_SET_DISPLAY_OFFSET, 0,
     1, SSD1306_SET_START_LINE + 0,
     2, SDD1406_CHARGE_PUMP_SETTING, SDD1406_CHARGE_PUMP_SETTING_ENABLE,
-    2, SSD1306_SET_MEM_ADDRESSING_MODE, SSD1306_SET_MEM_ADDRESSING_HORIZONTAL,
+    2, SSD1306_SET_MEM_ADDRESSING_MODE, ADDRESSING_MODE,
     1, SSD1306_SET_SEGMENT_MAP_REMAPED,
     1, SSD1306_SET_COM_OUTPUT_SCAN_FLIPPED,
 
@@ -156,6 +162,7 @@ ssd1306_init(lv_disp_drv_t *driver)
     lcd_command_sequence(init_cmds);
 }
 
+#if MYNEWT_VAL_CHOICE(SSD1306_ADDRESSING_MODE, horizontal)
 void
 ssd1306_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
 {
@@ -178,6 +185,30 @@ ssd1306_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
 
     lv_disp_flush_ready(drv);
 }
+#else
+void
+ssd1306_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p)
+{
+    uint8_t page1 = area->y1 >> 3;
+    uint8_t page2 = area->y2 >> 3;
+
+    uint8_t *buf = (uint8_t *)color_p;
+    int width = area->x2 - area->x1 + 1;
+    uint8_t b[3];
+
+    for (; page1 <= page2; ++page1, buf += width) {
+        b[0] = SSD1306_SET_PAGE_START_ADDRESS + page1;
+        lcd_ift_write_cmd(b, 1);
+        b[0] = SSD1306_SET_LOWER_COL_ADDRESS + (area->x1 & 0xF);
+        lcd_ift_write_cmd(b, 1);
+        b[0] = SSD1306_SET_HIGHER_COL_ADDRESS + ((area->x1 >> 4) & 0xF);
+        lcd_ift_write_cmd(b, 1);
+
+        lcd_itf_write_color_data(area->x1, area->x2, page1 << 3, ((page1 + 1) << 3) - 1, buf);
+    }
+    lv_disp_flush_ready(drv);
+}
+#endif
 
 void
 ssd1306_set_px_cb(struct _lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_w, lv_coord_t x, lv_coord_t y,
@@ -196,6 +227,9 @@ ssd1306_set_px_cb(struct _lv_disp_drv_t *disp_drv, uint8_t *buf, lv_coord_t buf_
 void
 mynewt_lv_drv_init(lv_disp_drv_t *driver)
 {
+    if (MYNEWT_VAL(LCD_RESET_PIN) >= 0) {
+        hal_gpio_init_out(MYNEWT_VAL(LCD_RESET_PIN), 1);
+    }
     lcd_itf_init();
     driver->flush_cb = ssd1306_flush;
     driver->set_px_cb = ssd1306_set_px_cb;

diff --git a/hw/drivers/display/lvgl/oled/ssd1306/syscfg.yml b/hw/drivers/display/lvgl/oled/ssd1306/syscfg.yml
@@ -17,6 +17,12 @@
 #
 
 syscfg.defs:
+    SSD1306_ADDRESSING_MODE:
+        description: Addressing mode.
+        choices:
+            - horizontal
+            - page
+        value: horizontal
 
 syscfg.vals:
     LVGL_DISPLAY_HORIZONTAL_RESOLUTION: 128