Vishay display APD-128G032

edge87

I would like to attach a Vishay APD-128G032 Display to my Stamp processor to send it serial data.

I wanted to create this to help everybody else who might be wanting to do something simular to this.

Here is the specs on that display:

www.vishay.com/docs/37006/apd128g.pdf

What I understand so far is that i will need power which i think i have done. then i need to send it a few signals to turn the display on and off as i send it data at a set hertz.

I'm not 100% sure the order in which i have to enable and disable things and when i should be sending data , and how to send that kind of data with a stamp. Also does the Basic Stamp 2 learning project kit come with some kind of a crystal clocking source?

Any help or snippets that people submit are greatly appreciated. Thanks!

Franklin

It would help us help you if you would show us how you have the stamp connected to the display and what code you are using to communicate with the display.

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- Stephen

edge87

I'm not sure i even have it remotely connected correctly. I just cut the ribbon cable and soldered pins on the end and plugged it into my bread board. so i'm really open for suggestions on how this should work.

Franklin

I'd start by finding a datasheet and then connecting it the way that tells you to. How do you have it connected now?

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- Stephen

edge87

I've attached the datasheet PDF.

pin 2 4 6 8 10 12 14 are all grounds so i put them on two rows on the bread board and then but them to the ground bar.

1 is the display enable
3 is row data
5 is row clock
7 column latch
9 dot clock
11 serial data


13 is not connected.

i attached it to the basic stamp 2 as follows

Pin 1 - 1
pin 3 - 2
pin 5 - 3
pin 7 - 4
pin 9 - 5
pin 11 - 6

the power i'm using is from a machine that the display came from so i'm fairly confident i've done the power correctly...

Franklin

OK, now how about your code?

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- Stephen

edge87

I know the constant is wrong. i haven't figured out how to do that yet. but the rest of it should be ok.

' {$STAMP BS2}
' {$PBASIC 2.5}

rowcounter VAR Byte

' -----[noparse][[/noparse] EEPROM Data ]-----------------------------------------------------


'setup a line that repeats vertial posts | put this in every line

solidBar  DATA %10101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010


PAUSE 1000

'must set clock on in/out 5 ??

DO
  rowcounter = 0 'blank counter

  LOW 1 ' turn off "display enable" during inputs
  LOW 4 ' turn off "latch" during inputs must be done after display enable goes low
  HIGH 2 ' turn on to signal first row comming
  HIGH 3 ' rise before sending data
  OUT6 = solidBar
  LOW 3 'fall after sending data
  HIGH 4 'kick on latch to send data to output
  HIGH 1 'enable display to show our image
  'do this only once because the first is different from the rest


  DO
    LOW 1 ' turn off "display enable" during inputs
    LOW 4 ' turn off "latch" during inputs must be done after display enable goes low
    HIGH 3 ' rise before sending data
    OUT6 = solidBar
    LOW 3 'fall after sending data
    HIGH 4 'kick on latch to send data to output
    HIGH 1 'enable display to show our image
    rowcounter = rowcounter + 1
  LOOP UNTIL rowcounter = 31


LOOP

Post Edited (edge87) : 5/5/2010 10:01:34 PM GMT

Franklin

Your OUT6 is not what you expect, it puts pin 6 in a high or low state depending on whether solidbar is evaluated as a 1 or a 0.

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- Stephen

edge87

I see i should of used SEROUT. I made several improvements to the code. but im not sure how to store my image. I have run out of memory.

' {$STAMP BS2}
' {$PBASIC 2.5}

rowcounter VAR Byte
sendthis VAR byte

'the data for the row loop
line0 VAR word
line1 VAR word
line2 VAR word
line3 VAR word
line4 VAR word
line5 VAR word
line6 VAR word
line7 VAR word
line8 VAR word
line9 VAR word
line10 VAR word
line11 VAR word
line12 VAR word
line13 VAR word
line14 VAR word
line15 VAR word
line16 VAR word
line17 VAR word
line18 VAR word
line19 VAR word
line20 VAR word
line21 VAR word
line22 VAR word
line23 VAR word
line24 VAR word
line25 VAR word
line26 VAR word
line27 VAR word
line28 VAR word
line29 VAR word
line30 VAR word
line31 VAR Word 'really this is line 32 the final line on the display. We started at 0 for the loop init.

' -----[noparse][[/noparse] EEPROM Data ]-----------------------------------------------------

'setup variables to hold our display message (gota find a better way to do this, seems like a major waste of memory  (could use a blank line and reuse it)


line0  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line1  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line2  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line3  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line4  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line5  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line6  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line7  = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line8  = "00000000000000000000000000000000000000001100000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line9  = "00000000000011000001100000110000000000001100000000000000000000000000000000000000000000000000000000000011000000000001100000000000"
line10 = "00000000000011000001100000110000000000001100000000000000000000000000000000000000000000000000000000000011000000000001100000000000"
line11 = "00000000000001100001110001100000000000001100000000000000000000000000000000000000000000000000000000000011000000000001100000000000"
line12 = "00000000000001100011110001100001111100001100000111100000111100000011011110011110000001111100000000000011000000000001100000000000"
line13 = "00000000000001100010010001100111111110001100011111110011111111000011111111111111000111111110000000000011000000000001100000000000"
line14 = "00000000000001100010010001100110000111001100011000010011000011000011100011100011000110000111000000000011000000000001100000000000"
line15 = "00000000000000110010011001001100000011001100110000000110000001100011000011000011001100000011000000000011000000000001100000000000"
line16 = "00000000000000110110011011001111111111001100110000000110000001100011000011000011001111111111000000000011000000000001100000000000"
line17 = "00000000000000110100001011001111111111001100110000000110000001100011000011000011001111111111000000000011000000000001100000000000"
line18 = "00000000000000110100001011001100000000001100110000000110000001100011000011000011001100000000000000000000000000000000000000000000"
line19 = "00000000000000011100001110000110000001001100111000010011000011000011000011000011000110000001000000000000000000000000000000000000"
line20 = "00000000000000011100001110000111111111001100011111110011111111000011000011000011000111111111000000000011000000000001100000000000"
line21 = "00000000000000011000000110000001111110001100001111100000111100000011000011000011000001111110000000000011000000000001100000000000"
line22 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line23 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line24 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line25 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line26 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line27 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line28 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line29 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line30 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
line31 = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

PAUSE 1000

'must set clock on in/out 5 ??

DO
  rowcounter = 0 'blank counter

  LOW 1 ' turn off "display enable" during inputs
  LOW 4 ' turn off "latch" during inputs must be done after display enable goes low
  HIGH 2 ' turn on to signal first row comming
  HIGH 3 ' rise before sending data
  SERout 6, 9600, [noparse][[/noparse]line0]
  LOW 3 'fall after sending data
  HIGH 4 'kick on latch to send data to output
  HIGH 1 'enable display to show our image
  'do this only once because the first is different from the rest


  DO
    sendthis = "line" + rowcounter

    LOW 1 ' turn off "display enable" during inputs
    LOW 4 ' turn off "latch" during inputs must be done after display enable goes low
    HIGH 3 ' rise before sending data
    SEROUT 6, 9600, [noparse][[/noparse]sendthis]
    LOW 3 'fall after sending data
    HIGH 4 'kick on latch to send data to output
    HIGH 1 'enable display to show our image
    rowcounter = rowcounter + 1
  LOOP UNTIL rowcounter = 31

LOOP

Franklin

You probably should store your data on an EPROM and read it in a line at a time to a variable. also your biggest variable in bs2 is 16 bytes and your strings are longer than that. I don't think you are going to be able to do this with a stamp.

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- Stephen

edge87

I thank you for all the help thus far.

I have also purchased a propeller learning kit, and a propeller chip for building this project. Will i have much better luck with a propeller? being that it is 32 bit?

Franklin

That depends, have you gotten anything to display on your device? If not you probably will not have better luck with the propeller.

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- Stephen