From fdc9132f0e8fc69d0f500ec07638ac595293083b Mon Sep 17 00:00:00 2001
From: Abdellah El Morabit <nsrddyn@gmail.com>
Date: Tue, 26 Nov 2024 13:38:12 +0100
Subject: fixed the file system

---
 source/hardware_driver.py | 71 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 source/hardware_driver.py

(limited to 'source/hardware_driver.py')

diff --git a/source/hardware_driver.py b/source/hardware_driver.py
new file mode 100644
index 0000000..7d48e69
--- /dev/null
+++ b/source/hardware_driver.py
@@ -0,0 +1,71 @@
+from smbus import SMBus
+from time import sleep
+
+ALIGN_FUNC = {
+    'left': 'ljust',
+    'right': 'rjust',
+    'center': 'center'}
+CLEAR_DISPLAY = 0x01
+ENABLE_BIT = 0b00000100
+LINES = {
+    1: 0x80,
+    2: 0xC0,
+    3: 0x94,
+    4: 0xD4}
+
+LCD_BACKLIGHT = 0x08
+LCD_NOBACKLIGHT = 0x00
+
+class LCD(object):
+
+    def __init__(self, address=0x27, bus=1, width=20, rows=4, backlight=True):
+        self.address = address
+        self.bus = SMBus(bus)
+        self.delay = 0.0005
+        self.rows = rows
+        self.width = width
+        self.backlight_status = backlight
+
+        self.write(0x33)
+        self.write(0x32)
+        self.write(0x06)
+        self.write(0x0C)
+        self.write(0x28)
+        self.write(CLEAR_DISPLAY)
+        sleep(self.delay)
+
+    def _write_byte(self, byte):
+        self.bus.write_byte(self.address, byte)
+        self.bus.write_byte(self.address, (byte | ENABLE_BIT))
+        sleep(self.delay)
+        self.bus.write_byte(self.address,(byte & ~ENABLE_BIT))
+        sleep(self.delay)
+
+    def write(self, byte, mode=0):
+        backlight_mode = LCD_BACKLIGHT if self.backlight_status else LCD_NOBACKLIGHT
+        self._write_byte(mode | (byte & 0xF0) | backlight_mode)
+        self._write_byte(mode | ((byte << 4) & 0xF0) | backlight_mode)
+
+    def text(self, text, line, align='left'):
+        self.write(LINES.get(line, LINES[1]))
+        text, other_lines = self.get_text_line(text)
+        text = getattr(text, ALIGN_FUNC.get(align, 'ljust'))(self.width)
+        for char in text:
+            self.write(ord(char), mode=1)
+        if other_lines and line <= self.rows - 1:
+            self.text(other_lines, line + 1, align=align)
+
+    def backlight(self, turn_on=True):
+        self.backlight_status = turn_on
+        self.write(0)
+
+    def get_text_line(self, text):
+        line_break = self.width
+        if len(text) > self.width:
+            line_break = text[:self.width + 1].rfind(' ')
+        if line_break < 0:
+            line_break = self.width
+        return text[:line_break], text[line_break:].strip()
+
+    def clear(self):
+        self.write(CLEAR_DISPLAY)
-- 
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