#firmataAnalogMonitor.rb 

#Requires: ncurses & serialport library for ruby
#          simpleAnalogFirmata.pde loaded onto the Arduino.

#by Justin Catalana justincatalana@gmail.com inhocsignovinces.net
#October 25 2008

#For educational purposes.

require "ncurses"
require "serialport.so"

firmataCodes = {
"e0" => "Analog/PWM From Pin 0:",
"e1" => "Analog/PWM From Pin 1:",
"e2" => "Analog/PWM From Pin 2:",
"e3" => "Analog/PWM From Pin 3:",
"e4" => "Analog/PWM From Pin 4:",
"e5" => "Analog/PWM From Pin 5:",
}

port_str = "/dev/tty.usbserial-A7006vri"  #Serial ID (Change this).
baud_rate = 115200 #Standard bitrate fir Firmata v2.
data_bits = 8
stop_bits = 1
parity = SerialPort::NONE

arduino = SerialPort.new(port_str, baud_rate, data_bits, stop_bits, parity)

begin
Ncurses.initscr
Ncurses.cbreak          
Ncurses.noecho         
Ncurses.nonl           
Ncurses.stdscr.intrflush(false) 
Ncurses.stdscr.keypad(true)    
Ncurses.curs_set 0 #This should hide the cursor, but isn't working.

Ncurses.stdscr.clear()
Ncurses.stdscr.border(*([0]*8))
Ncurses.stdscr.move(1,1)
Ncurses.stdscr.addstr("Arduino Firmata Analog Port Monitor. <press anykey to start>")
Ncurses.stdscr.move(3,18)
Ncurses.stdscr.addstr("analogRead")
Ncurses.stdscr.move(3,30)
Ncurses.stdscr.addstr("mV")
Ncurses.stdscr.move(4,2)
Ncurses.stdscr.addstr("Analog Port 0:")
Ncurses.stdscr.move(5,2)
Ncurses.stdscr.addstr("Analog Port 1:")
Ncurses.stdscr.move(6,2)
Ncurses.stdscr.addstr("Analog Port 2:")
Ncurses.stdscr.move(7,2)
Ncurses.stdscr.addstr("Analog Port 3:")
Ncurses.stdscr.move(8,2)
Ncurses.stdscr.addstr("Analog Port 4:")
Ncurses.stdscr.move(9,2)
Ncurses.stdscr.addstr("Analog Port 5:")
Ncurses.getch()

while true do
	oneByte = arduino.getc::to_s(16)
	
	if (firmataCodes[oneByte] != nil) #Checks to make sure the byte is a command.
		
		#Analog read commands are send as two 7-bit bytes. 
		#Below they are correctly added together. 
		#If you know how to make this look better, tell me.
		commandPin = oneByte.split(//)
		alogLSB = arduino.getc::to_s(2)
		alogMSB = arduino.getc::to_s(2)
		total = 0
		bitArray = alogMSB.split(//) + alogLSB.split(//)
		for i in 1..bitArray.size
			total += (bitArray[i-1].to_i)*(2**(bitArray.size-i))
		end
		
        mV = (total*4.5).to_s << "     "
		s1 = total.to_s << "     "

        if 0 <= total && total < 1024 #clears bad bits.
		case commandPin[1] 
			when "0"
				Ncurses.stdscr.mvaddstr(4, 18, s1)
				Ncurses.stdscr.mvaddstr(4, 30, mV)
				
			when "1"
				Ncurses.stdscr.mvaddstr(5, 18, s1)
				Ncurses.stdscr.mvaddstr(5, 30, mV)
			when "2"
				Ncurses.stdscr.mvaddstr(6, 18, s1)
				Ncurses.stdscr.mvaddstr(6, 30, mV)
			when "3"
				Ncurses.stdscr.mvaddstr(7, 18, s1)
				Ncurses.stdscr.mvaddstr(7, 30, mV)
			when "4"
				Ncurses.stdscr.mvaddstr(8, 18, s1)
				Ncurses.stdscr.mvaddstr(8, 30, mV)
			when "5"
				Ncurses.stdscr.mvaddstr(9, 18, s1)
				Ncurses.stdscr.mvaddstr(9, 30, mV)
		end
		end	
		Ncurses.refresh()
	end
end

Ncurses.getch()

ensure
arduino.close 
Ncurses.endwin
end