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Hi Henry, What about having say 12 AVRs running with 12 different SD cards all hooked up to the same output using diodes to control the current flow. Probably overkill for what you need but the chips and hardware etc shouldn't be that expensive if your making a custom board anyway and this will sim...

Ben,

Do you have any thoughts on my project?

Henry

It's nearly impossible to do it this way, isn't it? Maybe the only way is to use an XMega AVR with 16kb of RAM.

Hello, Alright. Is there a way to jump to specific sectors of a file other than looping the Move_To_Next_File_Sector macro? It might be possible for me to make a skip to function that allows you to skip directly to an offset sector in the file and maybe also directly to the end of the file if appen...

Hello, is there a way to read just ONE byte from the 512 byte buffer on the SD card? Transferring the entire buffer from the SD card to the local buffer takes way too much time. I would just read off each sector buffer of my 12 files, then store them in the AVR's ram, but 6.1 kbytes is too large fo...

Hello Henry, I think I can see your problem. When you are reading back the files you are not collecting the latest buffer from the file, instead you are using the local copy of the sector buffer. Here is your code at the moment. set file index (0) value = read byte from buffer (0) portd = value set...

Benj wrote:Hi jordy,

Are you opening the file after you create it? Can you attach your program.

Hi henry can you please attach your prog too and I'll have a look. I tested the mechanism by reading files so it should be working.

Hello Ben!

Attached are the files.

Henry

Ben, So I have a slight problem too. I have been playing around with the file index and so far it works perfectly for switching currently opened files to write to. But for some reason the file index won't switch the open file to the right one when reading from the card. It just stays on whatever the...

Right here we go here is the semi official release for the new and improved FAT component. FC5_GENERIC_FAT16.c The Generic File needs renaming to match the FAT component C file from your Components directory. Onc eyou have renamed the file copy it into the components folder replacing the file that ...

Hi Rocket, Sorry I'm not ignoring you. I have lots of thoughts but not sure how relevant they are. I will have another go to try and replicate your setup and see if I hit the same issue. A card that was working in v4 should certainly be working with the newer code, the same goes (hopefully) for car...

Do you have any thoughts?

Hi Rocket, Hmm is the sect bytes error returning on all the cards your trying or are you only testing a single card? What about if you format the card using different cluster sizes. Finally was the card working previously? Very odd as my PIC version is working for all cards and we have ported the c...

Ben,

Do you need me to post anything that would help you debug the error?

Hello, I haven't tested on AVR hardware yet but it seems to compile. Let me know how you get on. Also you might want to make a backup of your old files just incase you need to go back for any reason. FC5_AVR_FAT16.c AVR_CAL_SPI.c The maximum number of files is set by this definition in the defines ...

I have managed to get multiple files to work quite easily so I will add it to the master code base and generate you the AVR version. This will significantly improve the data speeds when handling multiple files and the new code shouldn't break any existing programs. (fingers crossed) Awesome!!! I ca...

Hi Rocket, I can see that opening several files and streaming from them would be a big strain for the current FAT component as it was designed to only really ever deal with 1 file. Multiple files are possible but as the files get bigger the runtime gets exponentially slower. I suppose I could creat...

I've currently acheived quite a substantial speed increase on standard 8-bit PIC so i'm hoping dsPIC should really fly. The only issue now is that the read / write functions now seem a bit unreliable. I have put some things in place, some of which have worked and hope to post up something a bit mor...

Hello. In the move from v4 to v5 we added the CAL (code abstraction layer). Nothing else should have changed with the component but we have recently added some SDHC changes and these seem to be causing issues. I am still looking into this issue so hopefully I will be back shortly with some better n...

And what about AVR? When will the update be arriving for this platform?

I'm going to have a dig in this weekend with the FAT component on PIC, AVR, ARM and dsPIC and see if I can get to the bottom of the issues. I'll let you know how I get on. Hopefully with some good news. Fantastic!! I have a quick question, has the speed of the SPI transactions for the Flowcode 5 FA...

Benj wrote:Hello,

Have you tried in software mode at all to see if that helps? I don't have that chip available here for testing but I can try with a mega324P.

Is there more information that you need me to provide so we can get this fixed?

Hello, Have you tried in software mode at all to see if that helps? I don't have that chip available here for testing but I can try with a mega324P. Hi, I have tried software mode. First it returns 255, then it returns 254 a second later. If you could test with the 324P, that would be awesome! I'm ...

Could somebody over at Matrix Multimedia possibly help me? I need to interface the SD card for a project that has a deadline coming up soon!

Thanks!

Hi All! :D I have a couble of max 7219 SPI 7 segm. driver. I can see that it use SPI for data input. Can I use the SPI component in FC to drive this chip? The max7219 have 3 input for serial command Din Load Clock, but the SPI component in FC have only 2 output. Data for max7219: http://datasheets....

what type of microcontroller are you using? Have you tryed a different SD Card? maybe that card wont work with Flowcode. Regards Jordy I am using an ATmega328p. And yes, I have tried multiple cards. Same result. I don't think it is the card because all SD cards I have tried worked with the Flowcode...