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add 128x32 code #9

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1 change: 1 addition & 0 deletions lib/SSD1306.rb
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
require 'i2c'
require 'rmagick'
include Magick

require 'SSD1306/version'
require 'SSD1306/font'
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87 changes: 58 additions & 29 deletions lib/SSD1306/display.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -70,44 +70,67 @@ def initialize(opts = {})
end

# For 128 x 64 display
if @height == 64
self.command SSD1306_DISPLAYOFF
self.command SSD1306_SETDISPLAYCLOCKDIV
self.command 0x80
self.command SSD1306_SETMULTIPLEX
self.command 0x3F
self.command SSD1306_SETDISPLAYOFFSET
self.command 0x0
self.command(SSD1306_SETSTARTLINE | 0x0)
self.command SSD1306_CHARGEPUMP
if @vccstate == SSD1306_EXTERNALVCC
self.command 0x10
else
self.command 0x14
end
self.command SSD1306_MEMORYMODE
self.command 0x00
self.command(SSD1306_SEGREMAP | 0x1)
self.command SSD1306_COMSCANDEC
self.command SSD1306_SETCOMPINS
# Common Command
self.command SSD1306_DISPLAYOFF
self.command SSD1306_SETDISPLAYCLOCKDIV
self.command 0x80
self.command SSD1306_SETMULTIPLEX
#self.command 0x3F
self.command @height-1
self.command SSD1306_SETDISPLAYOFFSET
self.command 0x0
self.command(SSD1306_SETSTARTLINE | 0x0)
self.command SSD1306_CHARGEPUMP
if @vccstate == SSD1306_EXTERNALVCC
self.command 0x10
else
self.command 0x14
end
self.command SSD1306_MEMORYMODE
self.command 0x00
self.command(SSD1306_SEGREMAP | 0x1)
self.command SSD1306_COMSCANDEC
self.command SSD1306_SETCOMPINS

# each size command
case @height
when 64 #128x64
self.command 0x12
self.command SSD1306_SETCONTRAST
if @vccstate == SSD1306_EXTERNALVCC
self.command 0x9F
else
self.command 0xCf
end
self.command SSD1306_SETPRECHARGE

when 32 #128x32
self.command 0x02
self.command SSD1306_SETCONTRAST
self.command 0x8f

when 16 #96x16 ?
self.command 0x02
self.command SSD1306_SETCONTRAST
if @vccstate == SSD1306_EXTERNALVCC
self.command 0x22
self.command 0x10
else
self.command 0xF1
self.command 0xAF
end
self.command SSD1306_SETVCOMDETECT
self.command 0x40
self.command SSD1306_DISPLAYALLON_RESUME
self.command SSD1306_NORMALDISPLAY

else
end

# Common Command
self.command SSD1306_SETPRECHARGE
if @vccstate == SSD1306_EXTERNALVCC
self.command 0x22
else
self.command 0xF1
end
self.command SSD1306_SETVCOMDETECT
self.command 0x40
self.command SSD1306_DISPLAYALLON_RESUME
self.command SSD1306_NORMALDISPLAY

self.command SSD1306_DISPLAYON
self.clear!
Expand Down Expand Up @@ -141,7 +164,9 @@ def display!
# Write buffer data
# TODO: This works for I2C only
control = 0x40
@interface.write @address, control, @buffer.pack('c*')
# p [ "DEBUG", @buffer]
@buf = @buffer.compact
@interface.write @address, control, @buf.pack('c*')
end

def image(image)
Expand All @@ -155,6 +180,7 @@ def image(image)
bits = bits << 1
bits |= pix[(page*8*@width) + x + ((7-bit)*@width)] == 0 ? 0 : 1
end
# p [page,x,bits] unless bits
@buffer[index] = bits
index += 1
end
Expand Down Expand Up @@ -185,6 +211,7 @@ def println(string)
self.print_char 10 # 10 is ASCII for \n
string
end
alias :puts :println

def font_size
return @cursor.size
Expand Down Expand Up @@ -237,9 +264,11 @@ def print_char(b)
end
bytes = bytes.map {|b| b.to_i(2)}
bytes.reverse!
# p bytes
#
for page in 0...@cursor.size
for x_interval in 0...@cursor.size
@buffer[@cursor.buffer_index(page) + i*@cursor.size + x_interval] = bytes[page]
@buffer[@cursor.buffer_index(page) + i*@cursor.size + x_interval] = bytes[page]
end
end
end
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