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Atmel AVR Microcontroller discussion group.
Programming mega169 without STK502 or 501 - Steven Chang-Lin Yu - Nov 25 19:35:00 2003
Got a question for you guys, is it possible to just build a ISP programming
port and connect it with the STK500to program the mega169 or other
equivalent microcontroller which needs 501 or 502???
Thanks
Steve
__________________________________________________________________
Steven Chang-Lin Yu
QUT EESE Student, Computer Technician
ICQ#: 66369374 Current ICQ status:
* Home Tel#: 0401 0436 41
* Work Tel#: 0401 0436 41
* HYPERLINK "http://wwp.icq.com/66369374"More ways to contact me
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port and connect it with the STK500to program the mega169 or other
equivalent microcontroller which needs 501 or 502???
Thanks
Steve
__________________________________________________________________
Steven Chang-Lin Yu
QUT EESE Student, Computer Technician
ICQ#: 66369374 Current ICQ status:
* Home Tel#: 0401 0436 41
* Work Tel#: 0401 0436 41
* HYPERLINK "http://wwp.icq.com/66369374"More ways to contact me
__________________________________________________________________
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.543 / Virus Database: 337 - Release Date: 21/11/2003
[Non-text portions of this message have been removed]
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matricial keyboar - Miguel Angel - Nov 26 11:46:00 2003
English version: somebody can help me with the routine of read a matricial keyboard.
Spanish Version: Alguien me podria ayudar con el codigo para leer un teclado matricial???
A.I.C.C. Miguel Angel Palos Montaņez.
---------------------------------
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Re: [AVR club] matricial keyboar - David VanHorn - Nov 26 14:02:00 2003
At 09:46 AM 11/26/2003 -0600, Miguel Angel wrote:
>English version: somebody can help me with the routine of read a matricial
keyboard.
Basically, you output a low on one of the columns, while the others are high, and look for it on the rows, with the pullups turned on.
Draw a grid, with columns vertical, and rows across.
Start out with all rows as input, and pulled up (high), and all columns as output high.
Pushing any button does nothing, because nothing changes at the row inputs.
Now take any column low.
Pushing any button connected to that column, makes the corresponding row go low.
Since you know what column you are taking low, then you know what a low on row pin 1 means.
Now scan through the columns, and detect lows on the row pins, and do it about 100 times a second, and you have a scanned keyboard.
(You need to be a member of avrclub -- send a blank email to avrclub-subscribe@yahoogroups.com )
Basically, you output a low on one of the columns, while the others are high, and look for it on the rows, with the pullups turned on.
Draw a grid, with columns vertical, and rows across.
Start out with all rows as input, and pulled up (high), and all columns as output high.
Pushing any button does nothing, because nothing changes at the row inputs.
Now take any column low.
Pushing any button connected to that column, makes the corresponding row go low.
Since you know what column you are taking low, then you know what a low on row pin 1 means.
Now scan through the columns, and detect lows on the row pins, and do it about 100 times a second, and you have a scanned keyboard.
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Re: [AVR club] matricial keyboar - Radu - Nov 26 22:10:00 2003
Yeap.
----- Original Message -----
From: Miguel Angel
To: avrclub@avrc...
Sent: Wednesday, November 26, 2003 7:46 AM
Subject: [AVR club] matricial keyboar
English version: somebody can help me with the routine of read a matricial keyboard.
Spanish Version: Alguien me podria ayudar con el codigo para leer un teclado matricial???
A.I.C.C. Miguel Angel Palos Montaņez.
---------------------------------
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----- Original Message -----
From: Miguel Angel
To: avrclub@avrc...
Sent: Wednesday, November 26, 2003 7:46 AM
Subject: [AVR club] matricial keyboar
English version: somebody can help me with the routine of read a matricial keyboard.
Spanish Version: Alguien me podria ayudar con el codigo para leer un teclado matricial???
A.I.C.C. Miguel Angel Palos Montaņez.
---------------------------------
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