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Altera_Forum's avatar
Altera_Forum
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18 years ago

nios II -sometime booting sometime not

Dear Friends,

I have nios II system (STRATIX II EP2S60F1020C5)with,

1. SDRAM

2. ext Flash

3. Nios II

4. LED

Reset : CFI flash

Exepction: SDRAM

Software library setup, .ro, program. , .txt - everything point to - SDRAM

This system setup is works fine, when trigger with nios II IDE, and when board reset and cpu reset,

but real problem comes when i done with bootloader, the system sometimes boots out of 10 try 6 try success, another 4 try fails, and cpu reset sometimes success then fails,

i dont know what is the problem , please help me

regards

baba

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    Check if the max frequency of your system after synthesis/fitter is more important than the running frequency of your system on the board (usually 85mhz).

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    Are you using JTAG UART? Try using a simple program with boot loader that simply blinks LEDs and does not use JTAG UART.