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Simon Inns
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Post subject: Re: 16x8 LED Matrix Display it can be expandable?  Posted: Fri Jan 27, 2012 4:21 pm |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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There isn't really a 'circuit' for checking the chip. If you have an oscilloscope you can use that to check the signal levels, otherwise the best option is to swap the chip for a new one and see if it works.
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kanishka
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Tue Jan 31, 2012 8:42 am |
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Joined: Sun Jan 08, 2012 1:13 pm
Posts: 2
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Can this circuit(file attached) use for checking A6276 IC.
if it's wrong,please correct it.
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A6276.zip [91.7 KiB]
Downloaded 85 times
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Simon Inns
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Tue Jan 31, 2012 1:01 pm |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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If you are planning on clocking in data by hand you will need a way to toggle the CLK line also. 1K is a little low for the pull ups, 10K would be better. The 470R on the leds is also not required (the Rext on the chip takes care of the current limiting).
Still this is no where near as quick as my previous suggestion... swap the chip; if it still doesn't work it's probably something else that's at fault.
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luis_tatu
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Fri Mar 16, 2012 12:43 pm |
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Joined: Fri Nov 18, 2011 12:02 am
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valdirdf wrote: luis_tatu wrote: eu nao tenho como copilar o codego fonte
por favor me mande o arquivo .hex
do projeto 16x8 LED Matrix Display Amigo, você conseguiu o A6276? Aqui no Brasil não é comercializado. Friend, you got the A6276? Here in Brazil is not marketed. SIMON EU COMPREI NA FARNELL DO BRASIL MEU CIRCUITO NAO FUNCIONOU EU GRAVEI O HEX NO CHIP COM O GRAVADOR PICBURNER SO QUE QUANDO EU FERIFICO O ARQUIVO HEX QUE ESTA NO CHIP ELE ESTA DIFERENTE SERA O QUE ESTA ACONTECENDO EU QUERIA QUE FUNCIONACE PARA NAO PERDER O PROGETO E O TRABALHO.
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sankos007
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Fri Jun 01, 2012 7:56 am |
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Joined: Thu May 31, 2012 8:55 pm
Posts: 2
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What kind of fuses i should use in WinPic800?
(which indicated in main program?)
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Simon Inns
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Fri Jun 01, 2012 12:17 pm |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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The fuse settings are included and documented in the main.c file within the source code. If you take a look at that file you will see the fuses which need to be set in you programmer. Alternatively use MPLAB and a supported programmer and your fuse settings will be performed automatically.
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sankos007
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Sun Jun 03, 2012 2:00 pm |
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Joined: Thu May 31, 2012 8:55 pm
Posts: 2
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Ok,when i use automatically fuses,then device dont work!!!but when i remove the tick from debug-then good but text moves slowly!!!when program with 16mhz then moves faster,but not so well as in your video!!!
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Simon Inns
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Wed Jun 06, 2012 6:12 am |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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The project circuit specifies a 20 MHz crystal. 16 MHz is too slow. Please try using the correct crystal and things should run at the right speed.
/Simon
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Arif
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Wed Jul 18, 2012 7:46 am |
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Joined: Wed Jul 18, 2012 6:50 am
Posts: 5
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Dear Simon Inns sir,
Thank you for your Nice 16x8 LED Matrix project. If I want to compile your project then which version MPLAB and Hi-tech C I have to installed ,please give me link. I got attached error. please help me..........
Debug build of project `C:\Documents and Settings\Administrator\Desktop\16x8_LED_Display\16x8 LED Display\16x8 LED Display.mcp' started.
Language tool versions: mplink.exe v4.35, mplink.exe v4.35, mcc18.exe v3.35
Preprocessor symbol `__DEBUG' is defined.
Wed Jul 18 12:44:46 2012
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Make: The target "C:\Documents and Settings\Administrator\Desktop\16x8_LED_Display\16x8 LED Display\main.o" is out of date.
Executing: "C:\MCC18\bin\mcc18.exe" -p=18F2550 "main.c" -fo="main.o" -D__DEBUG -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-
[color=#FF0040]
C:\Documents and Settings\Administrator\Desktop\16x8_LED_Display\16x8 LED Display\main.c:4:Error [1027] unable to locate 'htc.h'[/color]
Halting build on first failure as requested.
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Debug build of project `C:\Documents and Settings\Administrator\Desktop\16x8_LED_Display\16x8 LED Display\16x8 LED Display.mcp' failed.
Language tool versions: mplink.exe v4.35, mplink.exe v4.35, mcc18.exe v3.35
Preprocessor symbol `__DEBUG' is defined.
Wed Jul 18 12:44:46 2012
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BUILD FAILED
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Simon Inns
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Post subject: Re: 16x8 LED Matrix Display it can be expandable? Posted: Thu Jul 19, 2012 10:21 am |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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You seem to be building with the microchip compiler rather than the HiTech C compiler. If you have both installed you must select the HiTech toolchain before compiling.
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