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Altera_Forum
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14 years ago

AS controller 'override' from NIOS

Hi, We have gotten into a bit of a mess here and need some Altera Guru help!!! We have inadvertently programmed a large number of boards, many of which are in the field, with an incorrect confi...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Hi Guys,

Thanks for the replies.

The NIOS firmware is loaded into SDRAM via PCI and then enabled. We only use ECPS to remotely update the configuration file stored in flash.

It looks like the configuration hardware has two independent mechanisms which is the root of the problem here. One which is in charge of clocking data from the flash file (presumably counting the amount of data based on the header it got from the SOF file) and another piece of hardware which is deciding when the FPGA has enough data to configure itself and enter user mode.

If ever the two mechanisms don't agree, it looks like the thing can get stuck. i.e. the device enters user mode but the AS controller is not finished.

I don't think there is a way out but to recall boards and re-program them.... :(