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Altera_Forum's avatar
Altera_Forum
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15 years ago

can't boot from sram

I build sopc with epcs component, with the reset vector and exception vector at sram section, and set .text section at sram section, I have changed the sram width from 32 bit to 8 bit, but I still ca...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Thanks Daixiwen

I should have said that i have tried the following programming procedure:

using quartus programmer

Uploaded the .sof with JTAG

The hardware (and software? maybe stays on from last time the elf was loaded) appear to work fine at this stage

with power still on i then......

using nios flash programmer

Uploaded the .sof (sof2flash) with JTAG

The hardware is now non volatile and works after power cycle but fails to run software

Uploaded the .elf (elf2flash) with JTAG

The hardware software now work on soft reset but after a power cycle it appears that the hardware is gone and with logic elements not generating expected activity on the boards LED's and consequently no CPU activity.

Jockeyjim