From aa2d44c9a2cd1be0bc5bafec2442e839a239f89b Mon Sep 17 00:00:00 2001
From: Peter-Martijn <pm@wolfshire.co.uk>
Date: Sun, 15 Jun 2025 13:32:00 +0200
Subject: [PATCH] Added RGB-LCD code

---
 grove-rgb-lcd/rgblcd.py | 68 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 grove-rgb-lcd/rgblcd.py

diff --git a/grove-rgb-lcd/rgblcd.py b/grove-rgb-lcd/rgblcd.py
new file mode 100644
index 0000000..7b80763
--- /dev/null
+++ b/grove-rgb-lcd/rgblcd.py
@@ -0,0 +1,68 @@
+from microcontroller import delay_us
+import board
+import busio
+
+DISPLAY_TEXT_ADDR = 0x3e
+DISPLAY_RGB_ADDR = 0x62
+class RGBLCD:
+    def __init__(self, i2cbus: busio.I2C, lcdaddr=DISPLAY_TEXT_ADDR, rgbaddr=DISPLAY_RGB_ADDR):
+        self._lcdaddr = lcdaddr
+        self._rgbaddr = rgbaddr
+        self.bus = i2cbus
+
+    # set backlight to (R,G,B) (values from 0..255 for each)
+    def setRGB(self, r,g,b):
+        self.bus.writeto(self._rgbaddr,bytes((0,0)))
+        self.bus.writeto(self._rgbaddr,bytes((1,0)))
+        self.bus.writeto(self._rgbaddr,bytes((0x08,0xaa)))
+        self.bus.writeto(self._rgbaddr,bytes((4,r)))
+        self.bus.writeto(self._rgbaddr,bytes((3,g)))
+        self.bus.writeto(self._rgbaddr,bytes((2,b)))
+
+    # send command to display (no need for external use)    
+    def textCommand(self, cmd):
+        self.bus.writeto(self._lcdaddr,bytes((0x80,cmd)))
+
+    # set display text \n for second line(or auto wrap)     
+    def setText(self, text):
+        self.textCommand(0x01) # clear display
+        delay_us(50000)
+        self.textCommand(0x08 | 0x04) # display on, no cursor
+        self.textCommand(0x28) # 2 lines
+        delay_us(50000)
+        count = 0
+        row = 0
+        for c in text:
+            if c == '\n' or count == 16:
+                count = 0
+                row += 1
+                if row == 2:
+                    break
+                self.textCommand(0xc0)
+                if c == '\n':
+                    continue
+            count += 1
+            self.bus.writeto(self._lcdaddr,bytes((0x40,ord(c))))
+
+    #Update the display without erasing the display
+    def setText_norefresh(self, text):
+        self.textCommand(0x02) # return home
+        delay_us(50000)
+        self.textCommand(0x08 | 0x04) # display on, no cursor
+        self.textCommand(0x28) # 2 lines
+        delay_us(50000)
+        count = 0
+        row = 0
+        while len(text) < 32: #clears the rest of the screen
+            text += ' '
+        for c in text:
+            if c == '\n' or count == 16:
+                count = 0
+                row += 1
+                if row == 2:
+                    break
+                self.textCommand(0xc0)
+                if c == '\n':
+                    continue
+            count += 1
+            self.bus.writeto(self._lcdaddr,bytes((0x40,ord(c))))