circle and fill_circle demo for T-Display

examples/T-DISPLAY/circles.py

+"""
+circles.py
+
+    Draw circles in random colors at random locations on a
+    LILYGO® TTGO T-Display.
+
+"""
+import random
+from machine import Pin, SPI
+import st7789
+
+def main():
+    tft = st7789.ST7789(
+        SPI(1, baudrate=30000000, sck=Pin(18), mosi=Pin(19)),
+        135,
+        240,
+        reset=Pin(23, Pin.OUT),
+        cs=Pin(5, Pin.OUT),
+        dc=Pin(16, Pin.OUT),
+        backlight=Pin(4, Pin.OUT),
+        rotation=3)
+
+    tft.init()
+
+    radius_max = 25
+
+    while True:
+        for rotation in range(4):
+            tft.rotation(rotation)
+            tft.fill(0)
+            col_max = tft.width() - radius_max
+            row_max = tft.height() - radius_max
+
+            for _ in range(128):
+
+                tft.fill_circle(
+                    random.randint(0, col_max),
+                    random.randint(0, row_max),
+                    random.randint(0, radius_max),
+                    st7789.color565(
+                        random.getrandbits(8),
+                        random.getrandbits(8),
+                        random.getrandbits(8)))
+
+                tft.circle(
+                    random.randint(0, col_max),
+                    random.randint(0, row_max),
+                    random.randint(0, radius_max),
+                    st7789.color565(
+                        random.getrandbits(8),
+                        random.getrandbits(8),
+                        random.getrandbits(8)))
+
+
+main()