The attached picture is my portable LCD display, its used for the reception and display of data from RFM22 data packets.
There is a single cell Lipo in the box and a small 3-5V up converter powering the LCD so that the contrast stays constant as the battery ages.
The unit contains a PICAXE 28X2 board and the Digole 'Universal Serial:UART/IIC/I2C/SPI Adapter for 128x64 LCD' this uses a cheap 128x64 graphic LCD for the display of text in various font sizes and graphics too.
Driven in UART mode (the supplied default) using serout commands on the PICAXE.
With the PICAXE running at 64MHz and a baud rate of 38400, the entire screen clear and write of the 7 lines takes 62mS, with no added program delays.
There is a single cell Lipo in the box and a small 3-5V up converter powering the LCD so that the contrast stays constant as the battery ages.
The unit contains a PICAXE 28X2 board and the Digole 'Universal Serial:UART/IIC/I2C/SPI Adapter for 128x64 LCD' this uses a cheap 128x64 graphic LCD for the display of text in various font sizes and graphics too.
Driven in UART mode (the supplied default) using serout commands on the PICAXE.
With the PICAXE running at 64MHz and a baud rate of 38400, the entire screen clear and write of the 7 lines takes 62mS, with no added program delays.
Code:
'Digole LCD Test Program for Universal Serial:UART/IIC/I2C/SPI Adapter for 128x64 graphic LCD
'Using JE AN 1286404 LCD
'Stuart Robinson - August 2013
#picaxe 28x2
#no_data
symbol var1 = b4
symbol var2 = b5
symbol loopv1 = b14 'loop counter
symbol wvar1 = w27
symbol baudLCD = T9600_64 'baud settings for serout TX, baud for LCD at startup
symbol baudLCD64 = T38400_64 'baud settings for serout TX, baud for faster LCD baud rate
symbol TXLCD = b.5 'I/O pin for driving LCD
symbol PXLED = a.3 'Pin to drive LED on PCB
symbol linedelay = 0
main:
setfreq em64 'switch to 64Mhz
pause 400 'short pause (50ms) to allow LCD to be ready
SerOut TXLCD, baudLCD,("DSS",0) 'Turn start welcome screen off
pause 400 'short pause (50ms) to allow LCD to be ready
SerOut TXLCD, baudLCD,("DC",0) 'Turn config message off
pause 400 'short pause (50ms) to allow LCD to be ready
SerOut TXLCD, baudLCD,("SB38400",0) 'Set baud rate from 9600 default
loop1:
high PXLED
gosub clearLCD
gosub Home1LCD
serout TXLCD, baudLCD64, ("TTDisplay Ready",CR)
gosub home2LCD
serout TXLCD, baudLCD64, ("TT012345678901234567890",CR)
gosub home3LCD
serout TXLCD, baudLCD64, ("TTLine 3 ABCDEFGHIJKLMN",CR)
gosub home4LCD
serout TXLCD, baudLCD64, ("TTLine 4 ABCDEFGHIJKLMN",CR)
gosub home5LCD
serout TXLCD, baudLCD64, ("TTLine 5 ABCDEFGHIJKLMN",CR)
gosub home6LCD
serout TXLCD, baudLCD64, ("TTLine 6 ABCDEFGHIJKLMN",CR)
gosub home7LCD
serout TXLCD, baudLCD64, ("TTLine 7 ABCDEFGHIJKLMN",CR)
low PXLED
pause 16000
goto loop1
'************************************************************************************
'Start LCD Routines for Digole Serial LCD
'************************************************************************************
backlighton:
'turn on backlight
SerOut TXLCD, baudLCD64,("BL",1)
backlightoff:
'turn off backlight
SerOut TXLCD, baudLCD64,("BL",0)
return
ClearLCD:
'clear display
SerOut TXLCD, baudLCD64,("CL") 'Clear LCD 240 x 64 pixels,
SerOut TXLCD, baudLCD64,("SF",10) 'set font to size 10
return
Home1LCD:
'set cursor start of line 1
SerOut TXLCD, baudLCD64,("TP",0,0)
return
Home2LCD:
'set cursor start of line 2
SerOut TXLCD, baudLCD64,("TP",0,1)
return
Home3LCD:
'set cursor start of line 3
SerOut TXLCD, baudLCD64,("TP",0,2)
return
Home4LCD:
'set cursor start of line 4
SerOut TXLCD, baudLCD64,("TP",0,3)
return
Home5LCD:
'set cursor start of line 5
SerOut TXLCD, baudLCD64,("TP",0,4)
return
Home6LCD:
'set cursor start of line 6
SerOut TXLCD, baudLCD64,("TP",0,5)
return
Home7LCD:
'set cursor start of line 7
SerOut TXLCD, baudLCD64,("TP",0,6)
return
'************************************************************************************
'END LCD Routines
'************************************************************************************