Hi All The flash loader in the megawizard, for the cyclone III will that let me write and read bytes the the Flash. If so is there any information in its setting etc. I have been struggling making a state machine that can save and read data in flash mem, could this be a soloutions Pleae do let me know

I believe the parallel flash loader is a megafunction that will configure your fpga from a CPLD/FLASH combo, and also allow flash programming via jtag. I dont think the it is the solution to read and write flash memory from an fpga.

How about using the Common Flash Interface Controller core in SOPC builder? (http://www.altera.com/literature/hb/nios2/n2cpu_nii5v3_01.pdf) Then you can add a simple SM as your avalon master to access the flash.

Can SOPC builder work for me as Djoshi says? I need flash to store a datasheet. First, I write it , then FPGA reads the datasheet out. Problem is that how I can write the datasheet which contains all displacements into the flash. I have read some books about NIOS2 , most of which tell me how to configure the fpga via the flash, but less examples about storage used in them. Could you explain it more ? Better a step to step way. Thanks very much!

Can you describe what format is the data sheet in? How do you plan to get the data into the FPGA?

The data sheet I use is 512K , which contains address and data as the picture I attached. The data sheet was made with VC++, the format boss gave to me is " .DAT" , you can open it in UltraEdit. I plan to use jtag to download the data sheet into FPGA , then the FPGA write the data into the flash. Problem is I don't know whether the Flash Programmer of Nios IDE can get it. The data written into the Flash will be read by FPGA , meanwhile FPGA works. I had used MCU to write W29C040 and DS1250Y-70. It is the first time I use Nios , the materials I get from altera is just using Flash to configure the FPGA but not to store data as I said. That is my trouble bothering me for a long time. Look forward to your reply! Thanks very much.

Megafunction altparallel_flash_loader--what is this

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Altera_Forum
Honored Contributor
18 years ago
If you are always accessing the 16-bit displacement and 16-bit PWM pari at the same time, you might want to combine the flash and make them appear to be a 32-bit flash and treat your data as 32-bit. It is possible to make both flash completely independent, with separate tri-state bridges as described, but this means you also need to have separate address & data for each flash which will consume lots of IO pins. You will also need to have another master to take advantage of simultanenous access to both flash.

Depending on the data type defined, Nios will adjust the access accordingly. For example, if you define a 32-bit word in Nios and when it is written to a 16-bit flash, I believe Nios will write to two consecutive locations. http://www.altera.com/literature/hb/qts/qts_qii54003.pdf

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Megafunction altparallel_flash_loader--what is this

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