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Altera_Forum's avatar
Altera_Forum
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10 years ago

BeMicroMAX10: Nios II system skips first pattern of LED sequence at power up only?

Hi all,

I have this board set up so the LEDs show a pattern like this below with a one second delay between them:

LED1-LED2-LED3-LED4-LED5-LED6-LED7-LED8 (0=on, 1=off)

1110-0111

1101-1011

1011-1101

0111-1110

1011-1101

1101-1011

back to start

This works fine except at power up. The first pattern (1110-0111) is skipped. After the first time it works as expected.

I program the Nios following the tutorial in youtube from altera (link below) with ocram (initialized) and CFM0 . I have no flash ip in my design.

https://www.youtube.com/watch?v=0k4azmdw9sk

Why can't I see the first pattern?

Thanks

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    You need to post some code to help us. The make-up of your qsys system isn't going to hold the answer...

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    As I was posting the code I saw the problem (i=1 should be i=0) so ... never mind.

    Thanks