Cart for Homebrews...

[Scouter3d]

Hi Mobsie,

It is not neccessary, but would be interesting...

TOM:-)

[Scouter3d]

Hi,

The first success!

I built the circuit SD-CARD Circuit from: http://www.dharmanitech.com/2009/01/sd- ... fat32.html

and it works! Now i can Access an FAT32 formated SD-Card and get its Directory and read files...

A small step for mankind but a giant leap for me

sdcard_working_2.jpg

sdcard_working_1.jpg

[Mobsie]

Respect!
This is a big step.

[MADrigal]

Does this mean you're now able to build your own USB pen-drive with a SD card in it?

Sort of SD card-to-USB pendrive adaptor?

[Scouter3d]

Hi,

The next step is interfacing the SRAM Chip and trying to Transfer from SDCARD to SRAM...

TOM:-)

[Scouter3d]

Does this mean you're now able to build your own USB pen-drive with a SD card in it?

Sort of SD card-to-USB pendrive adaptor?

It is not about SD Card to USB - the SD Card to Atmega32 is the key element!
with the rs232 Output to a terminalprogram on a pc one could Monitor whats Happening but also easily choose an Image from the SD Card to emulate...

TOM:-)

[TBCTBC]

Do you need that big of a chip? I guess there's a surface mounted version of it too though.

[Scouter3d]

Hi,

Yes, there is a surfacemount Version of the Atmega32 available, but it is easier to prototype with DIL Chips...

TOM:-)

[Scouter3d]

The hardware is growing!

Now i have interfaced the SRAM with 2 Ports on the Atmega32 chip (2x 74LS573 latches for the Addressbus)...

Next step is writing the SRAM access program for the Atmega and see if i can read from SDCard, write to SRAM and read from SRAM again and Display the data over the RS232 bus...

TOM:-)

sram_hw_2.jpg

sram_hw_1.jpg

[Mobsie]

Respect!
I like the way how you show us your steps.