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racerx
Joined: 30 Aug 2005
Posts: 6
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| serial write to gu128x64-330 noritake VFD? |
 Posted: Tue Aug 30, 2005 4:54 pm |
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Hello,
I have been trying to write serially to a noritake GU128x64-330 display.
the default mode to talk is
19.2k, even parity.
information removed, because I was an idiot to post without it right in front of me.
please see below for correct information.
thank you pcm for pointing to the correct spec.
Last edited by racerx on Wed Aug 31, 2005 11:19 am; edited 2 times in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Aug 30, 2005 6:19 pm |
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| Quote: | | I have been trying to write serially to a noritake gui128x64-330 display. |
Is that part number accurate ?
The search engine on the Noritake website doesn't find it.
Goggle doesn't find it.
Is it really gu128x64-330 ? (ie., with no "i" after the "gu")
If so, Noritake is one of those companies that won't give out the
data sheet. However, an alternate site appears to have it.
http://www.elektronica-it.com/Itron/
Is this the data sheet you're using:
http://www.elektronica-it.com/Itron/GU128X64-330_E01.pdf
If so, I don't see the command sequence that you specified in your
post, given in the data sheet. What page of the data sheet shows
that sequence ? |
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racerx
Joined: 30 Aug 2005
Posts: 6
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| Posted: Tue Aug 30, 2005 6:53 pm |
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sorry, yes that is the correct part number. On page 3 they talk about the character write mode. On page 12 they talk about the serial write timing.
I can post the source code in the morning, the code above is off the top of my head.
thanks |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Aug 30, 2005 7:19 pm |
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| Quote: | | the code above is off the top of my head. |
Grrrr....
Next thread. |
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racerx
Joined: 30 Aug 2005
Posts: 6
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| Posted: Wed Aug 31, 2005 6:10 am |
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sorry, no code off top of head ever again!
here is the lcd only portion:
| Code: |
#include <16f88.h>
#fuses HS,NOLVP,NOWDT,PUT,MCLR
#use delay(clock=20000000)
#use rs232(baud=19200, xmit=PIN_A4, parity=e, stream=LCD)
#use rs232(baud=38400, xmit=PIN_B5, rcv=PIN_B2, parity=n, stream=PORT)
#define WR PIN_A2 // output RED/WRITE
#define RESET PIN_A3 // output WHITE/RESET
#define SIN PIN_A4 // output ORANGE/Serial IN
#define BUSY PIN_B0 // input BLUE/BUSY
#byte PORT_B = 0x06
#byte ANSEL = 0x9B
main()
{
/* init registers */
set_tris_a(0b11100010); // RA1 not used, RA0, RA4:2 output, RA5 = mclr , RA7:6 OSC
set_tris_b(0b11011111); // port b all input, RB5 tx out
ANSEL = 0x00; // disable all A/D and make them digital I/0
// reset the display by bringing the reset line low
output_low(RESET);
delay_ms(10);
output_high(RESET);
delay_ms(210); //wait 210 mS for display to fully power back up
// write to the display
output_low(WR);
fprintf(LCD, "\x01\x43");
fprintf(LCD, "\x00\x01");
fprintf(LCD, "SR");
output_high(WR);
}
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Last edited by racerx on Wed Aug 31, 2005 10:55 am; edited 1 time in total |
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Ttelmah
Guest
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| Posted: Wed Aug 31, 2005 9:14 am |
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What you post in neither case agrees with what you say the unit needs. The sequence:
fprintf(LCD,"\x01\x43\x52\x01\x72");
sends 01+<C>+<R>+01+<r>
not the 'CS' you say is needed. Similarly on the latter code, you send:
01+<C>+00+01+<S>+<R>
Try:
fprintf(LCD,"\x01CS\x01r");
Also if you want to control the TRIS lines, switch to using fast_io, otherwise the settings you make will be overridden as soon as you do an I/O instruction.
Best Wishes |
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racerx
Joined: 30 Aug 2005
Posts: 6
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| Posted: Wed Aug 31, 2005 11:16 am |
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from the spec exactly:
8.2 Structure of data block
A data block consists of "Header", "Op code" and "Data".
"Header" + "Op code" + "Data"
01HEX 1Byte
"Header": 01HEX
"Op Code" : Operation code which specify a type of "Data" such as Graphics, charater and command.
"Data" : Data block
8.3 Op code
8.3.1 Charater Write
Op code: "C"
Format
01HEX + "C"(43HEX) + Start ADRS (1Byte) + LEN(1Byte) + Write Mode(1Byte) + chr(1) + chr(2) + ... + chr(LEN)
so I try to send R to the lcd on line one at Adrs 00
fprintf(LCD, "\x01C\x00\x01SR");
so if I echo this command to minicom, I only get .C back from the fprintf, and not the .CSR that I think I should get. |
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Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
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| Posted: Wed Aug 31, 2005 11:36 am |
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| add a while(1) to the bottom of your main. The way you have it, it hits a hidden sleep instruction after main before the uart is finished transmitting. |
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racerx
Joined: 30 Aug 2005
Posts: 6
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| Posted: Wed Aug 31, 2005 12:35 pm |
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the fprintf command bombs out if you try to send \x00 for the address, perhaps there is some kind of internal parsing occuring with it?
i use \x01 and bam the charater is on the screen!
| Code: |
#include <16f88.h>
#fuses HS,NOLVP,NOWDT,PUT,MCLR
#use delay(clock=20000000)
#use rs232(baud=19200, xmit=PIN_A4, parity=e, stream=LCD)
//#use rs232(baud=38400, xmit=PIN_B5, rcv=PIN_B2, parity=n, stream=PORT)
#define WR PIN_A2 // output RED
#define RESET PIN_A3 // output WHITE
#define SIN PIN_A4 // output ORANGE
#define BUSY PIN_B0 // input BLUE
#byte PORT_B = 0x06
#byte ANSEL = 0x9B
main()
{
/* init registers */
set_tris_a(0b11100010); // RA4:2 output, RA5 = mclr , RA7:6 OSC
set_tris_b(0b11011111); // port b all input, RB5 tx out
ANSEL = 0x00; // disable all A/D and make them digital I/0
output_low(RESET);
delay_ms(10);
output_high(RESET);
delay_ms(210); //wait 2 seconds for display
fprintf(LCD, "\x01C\x01\x01SR");
while(1);
}
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Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
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| Posted: Wed Aug 31, 2005 1:21 pm |
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| I don't believe that you can send 0 (null) with a printf command. That usually signifies the end of a string. |
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racerx
Joined: 30 Aug 2005
Posts: 6
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| Posted: Wed Aug 31, 2005 1:53 pm |
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| is there a command to do serial out like serout or serout2 in picbasic? |
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Mark
Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA
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| Posted: Wed Aug 31, 2005 2:31 pm |
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| putc() |
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