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Address pins not functioning, while Data, CE, We and OE are

Alan Day
Intellectual 920 points
Other Parts Discussed in Thread: TMS570LS20216

Hi,

I've tested the attached basic code on my own design using the TMS570LS3137ZWT and on the dev board TMS570LS31x HDK and I see the same problem on both.

I've looked back at the working code I completed a while ago for the TMS570LS20216 to see if I've missed something but I can't see the wood for the trees.

Can someone with fresh eyes help, the code is a simple as possible.

Muxed pins for EMIF, enable IRQ, VIM,PMU,MPU,EMIF. Write/read associated address range.

However I see no movement on any of the Address pins.

Cheers

Alan

1122._HDK_EMIF.zip

  • 0
    Genius 3315 points

    Hello Alan,

    I have not walked through your code in detail - but I would suggest following:

    /* to set 31-th bit as stated in TRM spnu499a on the page 229 and advised by http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/269835.aspx */
    systemREG1->GPREG1 |= (1U << 31U);

    This is a "typical" mistake when using the EMIF.

    Cheers, Jiri