add ili9341 test program; hard-code the only supported resolution

Author: BrianPugh

driver/generic/ili9xxx-test.py

@@ -0,0 +1,48 @@
+from machine import SPI, Pin
+
+from ili9xxx import Ili9341_hw
+
+
+def build_rect_buf(w, h, inner=[0x00, 0x00]):
+    top = b"\xFF\xFF" * w
+    body = (b"\xFF\xFF\xFF" + bytes(inner) * (w - 3) + b"\xFF\xFF\xFF") * (h - 3)
+    bot = b"\xFF\xFF" * w
+    return top + body + bot
+
+
+spi = SPI(
+    0,
+    baudrate=24_000_000,
+    sck=Pin(18),
+    mosi=Pin(19),
+    miso=Pin(16),
+)
+lcd = Ili9341_hw(spi=spi, cs=17, dc=15, rst=14)
+
+lcd.set_backlight(30)
+for rot in (0, 1, 2, 3):
+    lcd.apply_rotation(rot)
+
+    lcd.clear(0x0000)
+    # 1/4 screen pixels square with white border red backgorund
+    w, h = lcd.width // 4, lcd.height // 8
+    bmp = build_rect_buf(w, h, [0x03, 0x03])
+    t0 = time.ticks_us()
+    lcd.blit(w, h, w, h, bmp)
+    t1 = time.ticks_us()
+    bmp = build_rect_buf(lcd.width, lcd.height // 20, [0x09, 0x09])
+    lcd.blit(0, 0, lcd.width, lcd.height // 20, bmp)
+
+    print("Maximum FPS @24MHz:", 24e6 / (320 * 240 * 16))  # FPS = F/(W*H*BPP)
+    print(
+        "Achieved FPS:", 1 / (16 * (t1 - t0) * 1e-6)
+    )  # Note: Test only draws 1/16 of the sreen area
+
+    print("Draw TSC calibration pattern")
+    w, h, wu, hu = lcd.width // 10, lcd.height // 10, lcd.width // 5, lcd.height // 5
+    bmp = build_rect_buf(w, h, [0xA0, 0xF0])
+    lcd.blit(wu, hu, w, h, bmp)
+    lcd.blit(4 * wu, hu, w, h, bmp)
+    lcd.blit(4 * wu, 4 * hu, w, h, bmp)
+    lcd.blit(wu, 4 * hu, w, h, bmp)
+    time.sleep(0.5)

driver/generic/ili9xxx.py

@@ -9,6 +9,7 @@
     * Usage information.
 """
 from micropython import const
+
 from st77xx import St77xx_hw, St77xx_lvgl
 
 # Command constants from ILI9341 datasheet
@@ -93,13 +94,13 @@
 
 
 class Ili9341_hw(St77xx_hw):
-    def __init__(self, res, **kw):
+    def __init__(self, **kw):
         """ILI9341 TFT Display Driver.
 
         Requires ``LV_COLOR_DEPTH=16`` when building lv_micropython to function.
         """
         super().__init__(
-            res=res,
+            res=(240, 320),
             suppRes=[
                 (240, 320),
             ],
@@ -156,11 +157,11 @@ def apply_rotation(self, rot):
 
 
 class Ili9341(Ili9341_hw, St77xx_lvgl):
-    def __init__(self, res, doublebuffer=True, factor=4, **kw):
+    def __init__(self, doublebuffer=True, factor=4, **kw):
         """See :obj:`Ili9341_hw` for the meaning of the parameters."""
         import lvgl as lv
 
-        Ili9341_hw.__init__(self, res=res, **kw)
+        Ili9341_hw.__init__(self, **kw)
         St77xx_lvgl.__init__(self, doublebuffer, factor)
         self.disp_drv.color_format = lv.COLOR_FORMAT.NATIVE_REVERSE
         self.disp_drv.register()