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Original question:

TMS320F28379D: About booting CPU2

TMS320F28379D: Flash boot fails at Cold start

Naoki.N
Intellectual 515 points

Part Number: TMS320F28379D

Hi

I'm having trouble with flash boot failure at almost 100% at cold start, can you give me some advice?

I am using GPIO43 and 42 for Boot mode pins, so I am setting  BOOT CTRL register 0x2A290B5A.

And I checked XRS waveform compare to VDDIO waveforms(3.3V) during power on sequence.

The yellow line is 3.3V, the blue line is /XRS waveforms

I am thinking the waveform is appropriate.

I can't identify the root cause, so can you give me some advice regarding waveforms and BootCTRL register setting etc?

Best regards

Naoki

  • 0
    TI__Mastermind 30031 points

    Hello,

    A subject-matter expert reply your question. However, we have been dealing with inclement weather and power outages in the area and responses may not come until early next week.

  • 0
    TI__Guru 62975 points

    Naoki-san,

    According to the BOOTCTRL description for boot mode pin selection, the value in the register should be 1 greater than the desired GPIO signal number:

    So in order to use GPIO43 and GPIO42 as boot mode pins, the register would need to contain the values of 44 and 43.  When I decode your BOOTCTRL value, I instead observe BMSP1=42=GPIO41 and BMSP0=41=GPIO40.

    -Tommy