first commit

Software/Shell/Grove - LCD RGB Backlight/lcd.sh

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+#!/bin/bash
+
+# usage:
+# ./lcd.sh
+
+# I2C addresses
+backlight=0x62
+character=0x3e
+
+# backlight registers
+mode1=0x00
+mode2=0x01
+pwm0=0x02
+pwm1=0x03
+pwm2=0x04
+ledout=0x08
+
+# character registers
+display=0x80
+letters=0x40
+
+
+# backlight
+# set to green
+
+red=0x00
+green=0xFF
+blue=0x00
+
+i2cset -y 1 $backlight $mode1 0x00   # mode 1 init, normal mode
+i2cset -y 1 $backlight $mode2 0x00   # mode 2 init
+i2cset -y 1 $backlight $pwm0 $blue   # blue
+i2cset -y 1 $backlight $pwm1 $green  # green
+i2cset -y 1 $backlight $pwm2 $red    # red
+i2cset -y 1 $backlight $ledout 0xAA  # led output state
+sleep 1
+
+# character
+# Hello World
+
+i2cset -y 1 $character $display 0x01  # clear display
+i2cset -y 1 $character $display 0x0F  # display on, block cursor
+i2cset -y 1 $character $display 0x38  # 2 lines
+i2cset -y 1 $character $letters 72    # H
+i2cset -y 1 $character $letters 101   # e
+i2cset -y 1 $character $letters 108   # l
+i2cset -y 1 $character $letters 108   # l
+i2cset -y 1 $character $letters 111   # o
+i2cset -y 1 $character $letters 32    # space
+i2cset -y 1 $character $letters 87    # W
+i2cset -y 1 $character $letters 111   # o
+i2cset -y 1 $character $letters 114   # r
+i2cset -y 1 $character $letters 108   # l
+i2cset -y 1 $character $letters 100   # d
+sleep 1
+
+
+# backlight
+# set to cyan
+
+red=0x00
+green=0xFF
+blue=0xFF
+
+i2cset -y 1 $backlight $pwm0 $blue   # blue
+i2cset -y 1 $backlight $pwm1 $green  # green
+i2cset -y 1 $backlight $pwm2 $red    # red
+sleep 1
+
+
+# character
+# Potato
+
+i2cset -y 1 $character $display 0x0E  # display on, underline cursor
+i2cset -y 1 $character $display 0xc0  # move cursor to row 2, col 0
+i2cset -y 1 $character $letters 80    # P
+i2cset -y 1 $character $letters 111   # o
+i2cset -y 1 $character $letters 116   # t
+i2cset -y 1 $character $letters 97    # a
+i2cset -y 1 $character $letters 116   # t
+i2cset -y 1 $character $letters 111   # o