TCM8240MD connector and example

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noend
Posts: 10
Joined: Wed May 19, 2010 3:45 am

Re: TCM8240MD connector and example

Post by noend » Thu Oct 28, 2010 5:49 pm

Everything you need to interface the TCM8230MD to a MCU is in the data sheet.
Last edited by noend on Tue Jan 04, 2011 10:15 am, edited 1 time in total.

d4n1s
Posts: 93
Joined: Thu Nov 04, 2010 6:09 am

Re: TCM8240MD connector and example

Post by d4n1s » Wed Nov 10, 2010 3:32 pm

anyone has .brd or .sch eagle files of the breakout board for the TCM8230MD camera?

gentlemich
Posts: 3
Joined: Thu Feb 18, 2010 7:54 pm

Re: TCM8240MD connector and example

Post by gentlemich » Mon Nov 15, 2010 9:09 am

I am having a problem interfacing with the TCM8230MD on I2C using a Texas Instruments DM365 chip:

When reading the register (0x00 in this case) the I am getting the first Acknowledgement but not the second! Therefore nothing is happening and I cannot read the register.

I2c Read protocol: S SlaveAddress 0 A SubAddress A
Where SlaveAddress = 0x60 or 0x3c +0 and SubAddress = 0x00.

The first A (Acknowledgement) is OK but I am not sure if the second appears. Here are my screenshots:

Yellow = SDA; Blue=SCL
photo 1.JPG
You can see the yellow SDA line going down for the first Acknowledgement but there is no second A after sending the SubAddress.

Larger zoom (notice the long pause) :
3.jpg
My clock is at 10Mhz, my lines at 3VDC.

Any idea why?

Roko
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Location: Vancouver, Canada
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Re: TCM8240MD connector and example

Post by Roko » Tue Nov 16, 2010 1:50 pm

Do you mean your SCL Clock is at 10 MHz? If so perhaps try scaling it down a couple orders of magnitude. SCL Max is 400 khz according to general I2C specs, as well as the TCM8230 datasheet.

Edit: NM, if I'm reading your scope traces correctly you're more in the ballpark of 300-400 KHz, which should be fine.
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JustGreg
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Joined: Wed Nov 17, 2010 1:12 pm

Re: TCM8240MD connector and example

Post by JustGreg » Thu Nov 18, 2010 12:32 pm

Hi everyone,

and greetings from me. I ordered two 8230 cams and I'll start experimenting as soon as they arrive. Anyway, has anyone tried the data transfer using an FTDI245 parallel FIFO USB chip? It has 8 data line can bedirectly connected to the camera DOUTs, and a 384 bytes FIFO. There would be no MCU action but to validate the lines at the FTDI's WR pin. Any idea?

@Dmitri

Would you be so kind as to name that battery pack on your picture? Thank you.

Dmitri
Posts: 31
Joined: Thu Oct 29, 2009 1:39 am

Re: TCM8240MD connector and example

Post by Dmitri » Fri Nov 19, 2010 12:21 pm

JustGreg wrote:@Dmitri

Would you be so kind as to name that battery pack on your picture? Thank you.
It is something pleasantly cheap from China, bought at e***.com

70mAh

JustGreg
Posts: 2
Joined: Wed Nov 17, 2010 1:12 pm

Re: TCM8240MD connector and example

Post by JustGreg » Mon Nov 22, 2010 2:39 pm

Thx.

gentlemich
Posts: 3
Joined: Thu Feb 18, 2010 7:54 pm

Re: TCM8240MD connector and example

Post by gentlemich » Tue Nov 23, 2010 8:58 am

gentlemich wrote: When reading the register (0x00 in this case) the I am getting the first Acknowledgement but not the second! Therefore nothing is happening and I cannot read the register.
I was able to solve the problem myself: the reason came from a poor soldering of the camera on the board...
I2C is ok and I even did not need any voltage translator (although the processor is at 3.3V the I2c line was limited at 3V by itself).

nachox2002
Posts: 20
Joined: Thu Jul 17, 2008 7:29 am

Re: TCM8240MD connector and example

Post by nachox2002 » Sun Dec 05, 2010 5:48 pm


snoop911
Posts: 6
Joined: Sat Sep 08, 2007 6:46 pm

Re: TCM8240MD connector and example

Post by snoop911 » Thu Dec 16, 2010 2:21 pm

Can this (or any hobby camera) output raw (uncompressed) images?

My micro has limited space and a jpeg decoder doesn't fit.. I'd like to find a uart/spi camera that outputs 8-bits per pixel.. (@320x240 resolution would be nice). Even monochrome 1bpp would be fine!

Dmitri
Posts: 31
Joined: Thu Oct 29, 2009 1:39 am

Re: TCM8240MD connector and example

Post by Dmitri » Thu Dec 23, 2010 2:28 am

Hi all!

I'd like to make something clear. I cannot provide any assistance in building something similar nor I would sell a ready-to-use device.
The first is because my motivation for this has gone, the second is because of juristical reservations about unknown purpose.

The entire project is still on sale though.

snoop911
Posts: 6
Joined: Sat Sep 08, 2007 6:46 pm

Re: TCM8240MD connector and example

Post by snoop911 » Thu Dec 23, 2010 10:05 am

@Dmitri: when you say the project is for sale, is it this one:

http://www.ifrdesign.com/blog/2010/08/0 ... tcm8240md/

(I didn't see any pricing info)

Dmitri
Posts: 31
Joined: Thu Oct 29, 2009 1:39 am

Re: TCM8240MD connector and example

Post by Dmitri » Thu Dec 23, 2010 11:07 am

snoop911 wrote:@Dmitri: when you say the project is for sale, is it this one:

http://www.ifrdesign.com/blog/2010/08/0 ... tcm8240md/

(I didn't see any pricing info)
My thingie is this one viewtopic.php?p=109977#p109977

It runs at 24 frame per second storing 320x240 color pictures to the micro SD card.
A PC software is available to dump frames to the HDD.

noend
Posts: 10
Joined: Wed May 19, 2010 3:45 am

Re: TCM8240MD connector and example

Post by noend » Mon Dec 27, 2010 10:46 am

Nice thingie.

ohmeega
Posts: 1
Joined: Fri Jan 07, 2011 2:39 am

Re: TCM8240MD connector and example

Post by ohmeega » Sun Jan 09, 2011 11:48 pm

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Last edited by ohmeega on Sat Jan 15, 2011 12:57 am, edited 1 time in total.

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