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Altera_Forum's avatar
Altera_Forum
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20 years ago

Flash programmer fails on custom board design

Hi I have a custom board design. My problem is that the flashprogrammer fails when trying to download to the flash, it fails with this message(Send (64) failed. Unable to synchronize with targe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hello,

Apparently, the programmer is able to upload the small design that will be used to transfer data from JTAG to flash (the one genereated by mk_target_board, let's call it the Programming Design), but when it starts, it cannot communicate with the application. So I think the problem comes from the Programming Design's .sof . I see two possible causes :

- There might be a problem if your programming design runs under 50MHz, I had the problem before. To avoid this, add a PLL to increase your Nios speed.

- The problem comes from your programming design pinout, but it seems to be a severe problem (not just a problem communicating with the flash, I think the Nios simply doesn't start). Maybe from the reset or the clock signals. Check your pin assign maybe.

Hope this helps,

Regards

pod