Adding an expansion port (game cartridge port) to the propeller
Wondering if it would be difficult to add an expansion port to the propeller chip, like the one used on the Hydra. I would only be using it as an external·eeprom.
How would I proceed?
Thanks.
How would I proceed?
Thanks.
Comments
Atmel sells large flash memory devices up to several MB in size that will interface to a Propeller via 3 or 4 I/O pins using the SPI protocol. Someone had posted some I/O routines, but I don't have the link. You can also use an SD card using Rokicki's FAT16 drivers.
Just brainstroming, and wondering how I might use a Hydra expansion game card (i.e. 128k expansion card) with the propeller educational kit.
Looking for the easiest way to load a Spin application onto a propeller chip using the Hydra eeprom card. *Or using a homemade eeprom card (which doesn't have to be 128k, I only really need 32k).
I am currently experimenting with the Hydra, but eventually I want to make a very simplified version of the Hydra, just using a propeller chip, gamepad port (female edge connector as on the Hydra), (plus the other vitals).
Thanks for any insight.
Post Edited (TonyA) : 7/7/2007 8:51:25 PM GMT
Thanks.
Post Edited (TonyA) : 7/7/2007 11:16:00 PM GMT
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Paul Baker
Propeller Applications Engineer
Parallax, Inc.
Would I not need to bring A0 high if I were using the eeprom on a removable card that is automatically detected by the Propeller? I'll be just using it·for simple storage.
(The onboard eeprom of the Hydra shows A1 being used to provide a "loop back" signal, but I wouldn't need the "loop back" option. So I would assume A1 would also go to ground in my case).
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Paul Baker
Propeller Applications Engineer
Parallax, Inc.
I want to make a simple eeprom card to connect to the Propeller. It would be the only eeprom used by my propeller chip. So I guess I would not have to·connect A0 to Vdd?
Thanks again for you help, I appreciate it.
Tony
Post Edited (TonyA) : 7/8/2007 7:30:00 PM GMT
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Paul Baker
Propeller Applications Engineer
Parallax, Inc.
What I'd like to do is just taking a single (no accessory) propeller chip and connect it to a diy card with an eeprom on it. It would be the only, single eeprom used with my propeller chip.
Like the Atari 2600 cartridge, except I could erase and re-program mine.
Thanks again. (I'm starting to understand, I appreciate it)