s3c2440 maximum gpio speed

ahmed

2012-12-11 19:13:43

what is s3c2440 maximum gpio io pin speed in mhz .
i need gpio speed. not cpu core speed.

ahmed

2012-12-17 13:38:45

why no answer

Dave McLaughlin

2012-12-17 15:50:26

Do a search in this forum for GPIO SPEED. You'll find 2 questions relating
to your issue.

ahmed

2012-12-18 00:44:30

i can't find it

Dave McLaughlin

2012-12-18 03:48:03

You didn't try very hard. I type GPIO SPEED into search and found your
question and these other 2.

http://www.friendlyarm.net/forum/topic/3566

http://www.friendlyarm.net/forum/topic/3476

ahmed

2012-12-18 14:02:48

thank you  Dave McLaughlin i read your link topic.
and i not find my

Dave McLaughlin

2012-12-18 18:50:13

Why don't you write a little bit of code with the OS you have to simply
toggle a GPIO pin on and off in a loop. You can then measure this with a
scope and get the value you need.

ahmed

2012-12-19 22:54:03

i not buy s3c2440 board yet. i want to collect information to buy s3c2440.

ahmed

2013-01-01 16:54:23

are this arm  site or not !!!!
my question is hard !!!!!!!!!!!!!!!!!

Dave McLaughlin

2013-01-01 17:13:33

Your question is a little hard to answer for simple reasons.

You don't specify which OS you will use or if it will be OS free.

You don't specify what sort of speed you want to get out of the device.

What is the application you are going to use this for?

ahmed

2013-01-02 20:36:07

thank you very much  Dave McLaughlin.

i will use s3c2440  OS free. i will write my own code .
i want to interface s3c2440 with high speed ADC.
 for making oscilloscope :) .

Juergen Beisert

2013-01-02 21:20:43

And why is your oscilloscope application depending on GPIO speed????

vishal

2013-01-04 11:48:54

hi
i am using samsung s3c2440 board . can anybody tell me which port they have
given  as a GPIO(34 pin) in this board ?
we have 130 pin io pins and ports from A,B......to ..H . in whic port we
can use from 34 pin GPIO?

Juergen Beisert

2013-01-04 12:33:46

Vishal,

take a look into the schematics of the Mini2440. All the info you need is
open.

miniarm

2013-01-04 13:16:44

it is CON4.

Dave McLaughlin

2013-01-04 13:57:55

Ahmed, if your scope requires speed, the commercial ones I have seen use
FPGA's to do the real time sampling. Asking a processor to do this in
software means your scope is basically going to be low speed.

Anyway, how does GPIO speed work with your ADC? Are you going to bit bang
SPI or something along those lines? Surely the built in SPI port would be
fast enough.

What sort of speed of scope are you planning on building?