#!/usr/bin/env python
#
# GrovePi library for the basic functions of Grove 128x64 OLED (http://www.seeedstudio.com/depot/Grove-OLED-Display-112-p-781.html)
# v1.0
#
# The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
#
# Have a question about this example?  Ask on the forums here:  http://forum.dexterindustries.com/c/grovepi
#
# LICENSE:
# These files have been made available online through a [Creative Commons Attribution-ShareAlike 3.0](http://creativecommons.org/licenses/by-sa/3.0/) license.
#
# Karan Nayan
# Initial Date: 12 Aug 2015
# Last Updated: 12 Aug 2015
#
# Based on the Arduino library "SeeedOLED.cpp"
# Seeed Technology Inc.
# written by: Visweswara R
#
'''
## License

The MIT License (MIT)

GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
Copyright (C) 2017  Dexter Industries

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
'''

import smbus
import time
import math
import RPi.GPIO as GPIO
import struct

rev = GPIO.RPI_REVISION
if rev == 2 or rev == 3:
    bus = smbus.SMBus(1)
else:
    bus = smbus.SMBus(0)

address=0x3c
addressingMode= None
SeeedOLED_Max_X                 =127 #128 Pixels
SeeedOLED_Max_Y                 =63  #64  Pixels

PAGE_MODE                       =1
HORIZONTAL_MODE                 =2

SeeedOLED_Address               =0x3c
SeeedOLED_Command_Mode          =0x80
SeeedOLED_Data_Mode             =0x40
SeeedOLED_Display_Off_Cmd       =0xAE
SeeedOLED_Display_On_Cmd        =0xAF
SeeedOLED_Normal_Display_Cmd    =0xA6
SeeedOLED_Inverse_Display_Cmd   =0xA7
SeeedOLED_Activate_Scroll_Cmd   =0x2F
SeeedOLED_Dectivate_Scroll_Cmd  =0x2E
SeeedOLED_Set_Brightness_Cmd    =0x81

Scroll_Left             =0x00
Scroll_Right            =0x01

Scroll_2Frames          =0x7
Scroll_3Frames          =0x4
Scroll_4Frames          =0x5
Scroll_5Frames          =0x0
Scroll_25Frames         =0x6
Scroll_64Frames         =0x1
Scroll_128Frames        =0x2
Scroll_256Frames        =0x3

BasicFont = [[0 for x in range(8)] for x in range(10)]
BasicFont=[[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],
[0x00,0x00,0x5F,0x00,0x00,0x00,0x00,0x00],
[0x00,0x00,0x07,0x00,0x07,0x00,0x00,0x00],
[0x00,0x14,0x7F,0x14,0x7F,0x14,0x00,0x00],
[0x00,0x24,0x2A,0x7F,0x2A,0x12,0x00,0x00],
[0x00,0x23,0x13,0x08,0x64,0x62,0x00,0x00],
[0x00,0x36,0x49,0x55,0x22,0x50,0x00,0x00],
[0x00,0x00,0x05,0x03,0x00,0x00,0x00,0x00],
[0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00],
[0x00,0x41,0x22,0x1C,0x00,0x00,0x00,0x00],
[0x00,0x08,0x2A,0x1C,0x2A,0x08,0x00,0x00],
[0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00],
[0x00,0xA0,0x60,0x00,0x00,0x00,0x00,0x00],
[0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00],
[0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x00],
[0x00,0x20,0x10,0x08,0x04,0x02,0x00,0x00],
[0x00,0x3E,0x51,0x49,0x45,0x3E,0x00,0x00],
[0x00,0x00,0x42,0x7F,0x40,0x00,0x00,0x00],
[0x00,0x62,0x51,0x49,0x49,0x46,0x00,0x00],
[0x00,0x22,0x41,0x49,0x49,0x36,0x00,0x00],
[0x00,0x18,0x14,0x12,0x7F,0x10,0x00,0x00],
[0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00],
[0x00,0x3C,0x4A,0x49,0x49,0x30,0x00,0x00],
[0x00,0x01,0x71,0x09,0x05,0x03,0x00,0x00],
[0x00,0x36,0x49,0x49,0x49,0x36,0x00,0x00],
[0x00,0x06,0x49,0x49,0x29,0x1E,0x00,0x00],
[0x00,0x00,0x36,0x36,0x00,0x00,0x00,0x00],
[0x00,0x00,0xAC,0x6C,0x00,0x00,0x00,0x00],
[0x00,0x08,0x14,0x22,0x41,0x00,0x00,0x00],
[0x00,0x14,0x14,0x14,0x14,0x14,0x00,0x00],
[0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x00],
[0x00,0x02,0x01,0x51,0x09,0x06,0x00,0x00],
[0x00,0x32,0x49,0x79,0x41,0x3E,0x00,0x00],
[0x00,0x7E,0x09,0x09,0x09,0x7E,0x00,0x00],
[0x00,0x7F,0x49,0x49,0x49,0x36,0x00,0x00],
[0x00,0x3E,0x41,0x41,0x41,0x22,0x00,0x00],
[0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00],
[0x00,0x7F,0x49,0x49,0x49,0x41,0x00,0x00],
[0x00,0x7F,0x09,0x09,0x09,0x01,0x00,0x00],
[0x00,0x3E,0x41,0x41,0x51,0x72,0x00,0x00],
[0x00,0x7F,0x08,0x08,0x08,0x7F,0x00,0x00],
[0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00],
[0x00,0x20,0x40,0x41,0x3F,0x01,0x00,0x00],
[0x00,0x7F,0x08,0x14,0x22,0x41,0x00,0x00],
[0x00,0x7F,0x40,0x40,0x40,0x40,0x00,0x00],
[0x00,0x7F,0x02,0x0C,0x02,0x7F,0x00,0x00],
[0x00,0x7F,0x04,0x08,0x10,0x7F,0x00,0x00],
[0x00,0x3E,0x41,0x41,0x41,0x3E,0x00,0x00],
[0x00,0x7F,0x09,0x09,0x09,0x06,0x00,0x00],
[0x00,0x3E,0x41,0x51,0x21,0x5E,0x00,0x00],
[0x00,0x7F,0x09,0x19,0x29,0x46,0x00,0x00],
[0x00,0x26,0x49,0x49,0x49,0x32,0x00,0x00],
[0x00,0x01,0x01,0x7F,0x01,0x01,0x00,0x00],
[0x00,0x3F,0x40,0x40,0x40,0x3F,0x00,0x00],
[0x00,0x1F,0x20,0x40,0x20,0x1F,0x00,0x00],
[0x00,0x3F,0x40,0x38,0x40,0x3F,0x00,0x00],
[0x00,0x63,0x14,0x08,0x14,0x63,0x00,0x00],
[0x00,0x03,0x04,0x78,0x04,0x03,0x00,0x00],
[0x00,0x61,0x51,0x49,0x45,0x43,0x00,0x00],
[0x00,0x7F,0x41,0x41,0x00,0x00,0x00,0x00],
[0x00,0x02,0x04,0x08,0x10,0x20,0x00,0x00],
[0x00,0x41,0x41,0x7F,0x00,0x00,0x00,0x00],
[0x00,0x04,0x02,0x01,0x02,0x04,0x00,0x00],
[0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00],
[0x00,0x01,0x02,0x04,0x00,0x00,0x00,0x00],
[0x00,0x20,0x54,0x54,0x54,0x78,0x00,0x00],
[0x00,0x7F,0x48,0x44,0x44,0x38,0x00,0x00],
[0x00,0x38,0x44,0x44,0x28,0x00,0x00,0x00],
[0x00,0x38,0x44,0x44,0x48,0x7F,0x00,0x00],
[0x00,0x38,0x54,0x54,0x54,0x18,0x00,0x00],
[0x00,0x08,0x7E,0x09,0x02,0x00,0x00,0x00],
[0x00,0x18,0xA4,0xA4,0xA4,0x7C,0x00,0x00],
[0x00,0x7F,0x08,0x04,0x04,0x78,0x00,0x00],
[0x00,0x00,0x7D,0x00,0x00,0x00,0x00,0x00],
[0x00,0x80,0x84,0x7D,0x00,0x00,0x00,0x00],
[0x00,0x7F,0x10,0x28,0x44,0x00,0x00,0x00],
[0x00,0x41,0x7F,0x40,0x00,0x00,0x00,0x00],
[0x00,0x7C,0x04,0x18,0x04,0x78,0x00,0x00],
[0x00,0x7C,0x08,0x04,0x7C,0x00,0x00,0x00],
[0x00,0x38,0x44,0x44,0x38,0x00,0x00,0x00],
[0x00,0xFC,0x24,0x24,0x18,0x00,0x00,0x00],
[0x00,0x18,0x24,0x24,0xFC,0x00,0x00,0x00],
[0x00,0x00,0x7C,0x08,0x04,0x00,0x00,0x00],
[0x00,0x48,0x54,0x54,0x24,0x00,0x00,0x00],
[0x00,0x04,0x7F,0x44,0x00,0x00,0x00,0x00],
[0x00,0x3C,0x40,0x40,0x7C,0x00,0x00,0x00],
[0x00,0x1C,0x20,0x40,0x20,0x1C,0x00,0x00],
[0x00,0x3C,0x40,0x30,0x40,0x3C,0x00,0x00],
[0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00],
[0x00,0x1C,0xA0,0xA0,0x7C,0x00,0x00,0x00],
[0x00,0x44,0x64,0x54,0x4C,0x44,0x00,0x00],
[0x00,0x08,0x36,0x41,0x00,0x00,0x00,0x00],
[0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x00],
[0x00,0x41,0x36,0x08,0x00,0x00,0x00,0x00],
[0x00,0x02,0x01,0x01,0x02,0x01,0x00,0x00],
[0x00,0x02,0x05,0x05,0x02,0x00,0x00,0x00]]

def sendCommand(byte):
    try:
        block=[]
        block.append(byte)
        return bus.write_i2c_block_data(address,SeeedOLED_Command_Mode,block)
    except IOError:
        print("IOError")
        return -1

def sendData(byte):
    try:
        block=[]
        block.append(byte)
        return bus.write_i2c_block_data(address,SeeedOLED_Data_Mode,block)
    except IOError:
        print("IOError")
        return -1

def multi_comm(commands):
    for c in commands:
        sendCommand(c)

# Init function of the OLED
def init():
	sendCommand(SeeedOLED_Display_Off_Cmd)     #display off
	time.sleep(.005)
	sendCommand(SeeedOLED_Display_On_Cmd)  	#display on
	time.sleep(.005)
	sendCommand(SeeedOLED_Normal_Display_Cmd)  #Set Normal Display (default)

def setBrightness(Brightness):
   sendCommand(SeeedOLED_Set_Brightness_Cmd)
   sendCommand(Brightness)

def setHorizontalMode():
	global addressingMode
	addressingMode = HORIZONTAL_MODE
	sendCommand(0x20)          #set addressing mode
	sendCommand(0x00)          #set horizontal addressing mode

def setPageMode():
	global addressingMode
	addressingMode = PAGE_MODE
	sendCommand(0x20)          #set addressing mode
	sendCommand(0x02)          #set page addressing mode

def setTextXY(Column,Row):
    sendCommand(0xB0 + Row)           #set page address
    sendCommand(0x00 + (8*Column & 0x0F))  #set column lower address
    sendCommand(0x10 + ((8*Column>>4)&0x0F))   #set column higher address

def clearDisplay():
	sendCommand(SeeedOLED_Display_Off_Cmd)   #display off
	for j in range(8):
		setTextXY(0,j)
		for i in range(16):  #clear all columns
			putChar(' ')
	sendCommand(SeeedOLED_Display_On_Cmd)    #display on
	setTextXY(0,0)

def putChar(C):
	C_add=ord(C)
	if C_add<32 or C_add>127:     # Ignore non-printable ASCII characters
		C=' '
		C_add=ord(C)

	for i in range(8):
		data=(BasicFont[C_add-32][i])
		sendData(data)

    # for i in range(0,8,2):
        # for j in range(0,8):
            # c=0x00
            # bit1=((BasicFont[C_add-32][i])>>j)&0x01
            # bit2=((BasicFont[C_add-32][i+1])>>j)&0x01
            # if bit1:
                # c=c|grayH
            # else:
                # c=c|0x00
            # if bit2:
                # c=c|grayL
            # else:
                # c=c|0x00
            # sendData(c)

def putString(s):
    for i in range(len(s)):
        putChar(s[i])

def putNumber(long_num):
	char_buffer[10]=None
	i = 0
	f = 0

	if (long_num < 0) :
		f=1
		putChar('-')
		long_num = -long_num

	elif (long_num == 0) :
		f=1
		putChar('0')
		return f

	while (long_num > 0):
		char_buffer[i] = long_num % 10
		long_num /= 10
		i+=1

	f=f+i
	while(i>0):
		putChar('0'+ char_buffer[i - 1])
		i-=1
	return f


def setHorizontalScrollProperties(direction,startPage, endPage, scrollSpeed):

	'''
	Use the following defines for 'direction' :
	Scroll_Left
	Scroll_Right
	Use the following defines for 'scrollSpeed' :
	Scroll_2Frames
	Scroll_3Frames
	Scroll_4Frames
	Scroll_5Frames
	Scroll_25Frames
	Scroll_64Frames
	Scroll_128Frames
	Scroll_256Frames
	'''

	if(Scroll_Right == direction):
		#Scroll Right
		sendCommand(0x26)
	else:
		#Scroll Left
		sendCommand(0x27)

	sendCommand(0x00)
	sendCommand(startPage)
	sendCommand(scrollSpeed)
	sendCommand(endPage)
	sendCommand(0x00)
	sendCommand(0xFF)


def activateScroll():
    sendCommand(SeeedOLED_Activate_Scroll_Cmd)

def deactivateScroll():
    sendCommand(SeeedOLED_Dectivate_Scroll_Cmd)

def setNormalDisplay():
    sendCommand(SeeedOLED_Normal_Display_Cmd)

def setInverseDisplay():
    sendCommand(SeeedOLED_Inverse_Display_Cmd)
