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l.cust8 instruction when loading the program into sdram
by xiaoxiaocaomao on Apr 23, 2013 |
xiaoxiaocaomao
Posts: 1 Joined: Feb 14, 2013 Last seen: Jun 21, 2013 |
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I used the http://opencores.org/project,sdr_ctrl and DE2-115 board.
I compiled a program which can work well on on-chip-memory. But the program cannot work when I changed the memory to be the sdram on the board. In the debug terminal, it responsed Illegal Instruction in 0x100. I used the disassemble command to check the instruction and all of the instructions from 0x2000 to the end were changed to be "l.cust8". Can anyone help me? Regards |
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RE: l.cust8 instruction when loading the program into sdram
by julius on Apr 30, 2013 |
julius
Posts: 363 Joined: Jul 1, 2008 Last seen: May 17, 2021 |
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Sounds like a bad SDRAM implementation (perhaps not the core but your set up of it.)
Can you successfully simulate the design? |
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