From 8e504db07c109e2bf4c89fe29393e0b4995e2b91 Mon Sep 17 00:00:00 2001
From: Tyler Peppy <61562476+T-622@users.noreply.github.com>
Date: Thu, 4 Feb 2021 12:52:18 -0500
Subject: [PATCH] Delete pico_i2c_lcd.py

---
 pico_i2c_lcd.py | 79 -------------------------------------------------
 1 file changed, 79 deletions(-)
 delete mode 100644 pico_i2c_lcd.py

diff --git a/pico_i2c_lcd.py b/pico_i2c_lcd.py
deleted file mode 100644
index d7941d8..0000000
--- a/pico_i2c_lcd.py
+++ /dev/null
@@ -1,79 +0,0 @@
-import utime
-
-from lcd_api import LcdApi
-from machine import I2C
-
-# PCF8574 pin definitions
-MASK_RS = 0x01       # P0
-MASK_RW = 0x02       # P1
-MASK_E  = 0x04       # P2
-
-SHIFT_BACKLIGHT = 3  # P3
-SHIFT_DATA      = 4  # P4-P7
-
-class I2cLcd(LcdApi):
-    
-    #Implements a HD44780 character LCD connected via PCF8574 on I2C
-
-    def __init__(self, i2c, i2c_addr, num_lines, num_columns):
-        self.i2c = i2c
-        self.i2c_addr = i2c_addr
-        self.i2c.writeto(self.i2c_addr, bytearray([0]))
-        utime.sleep_ms(20)   # Allow LCD time to powerup
-        # Send reset 3 times
-        self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
-        utime.sleep_ms(5)    # Need to delay at least 4.1 msec
-        self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
-        utime.sleep_ms(1)
-        self.hal_write_init_nibble(self.LCD_FUNCTION_RESET)
-        utime.sleep_ms(1)
-        # Put LCD into 4-bit mode
-        self.hal_write_init_nibble(self.LCD_FUNCTION)
-        utime.sleep_ms(1)
-        LcdApi.__init__(self, num_lines, num_columns)
-        cmd = self.LCD_FUNCTION
-        if num_lines > 1:
-            cmd |= self.LCD_FUNCTION_2LINES
-        self.hal_write_command(cmd)
-
-    def hal_write_init_nibble(self, nibble):
-        # Writes an initialization nibble to the LCD.
-        # This particular function is only used during initialization.
-        byte = ((nibble >> 4) & 0x0f) << SHIFT_DATA
-        self.i2c.writeto(self.i2c_addr, bytearray([byte | MASK_E]))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte]))
-        
-    def hal_backlight_on(self):
-        # Allows the hal layer to turn the backlight on
-        self.i2c.writeto(self.i2c_addr, bytearray([1 << SHIFT_BACKLIGHT]))
-        
-    def hal_backlight_off(self):
-        #Allows the hal layer to turn the backlight off
-        self.i2c.writeto(self.i2c_addr, bytearray([0]))
-        
-    def hal_write_command(self, cmd):
-        # Write a command to the LCD. Data is latched on the falling edge of E.
-        byte = ((self.backlight << SHIFT_BACKLIGHT) |
-                (((cmd >> 4) & 0x0f) << SHIFT_DATA))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte | MASK_E]))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte]))
-        byte = ((self.backlight << SHIFT_BACKLIGHT) |
-                ((cmd & 0x0f) << SHIFT_DATA))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte | MASK_E]))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte]))
-        if cmd <= 3:
-            # The home and clear commands require a worst case delay of 4.1 msec
-            utime.sleep_ms(5)
-
-    def hal_write_data(self, data):
-        # Write data to the LCD. Data is latched on the falling edge of E.
-        byte = (MASK_RS |
-                (self.backlight << SHIFT_BACKLIGHT) |
-                (((data >> 4) & 0x0f) << SHIFT_DATA))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte | MASK_E]))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte]))
-        byte = (MASK_RS |
-                (self.backlight << SHIFT_BACKLIGHT) |
-                ((data & 0x0f) << SHIFT_DATA))      
-        self.i2c.writeto(self.i2c_addr, bytearray([byte | MASK_E]))
-        self.i2c.writeto(self.i2c_addr, bytearray([byte]))
-- 
2.47.3