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IWR1642: Host processor as image source

Brandon08
Mastermind 24305 points
Part Number: IWR1642

Team,

I am looking at our bootloader app note (www.ti.com/.../spraci4.pdf) and I would like to understand if a QSPI flash is required to boot the image into on-chip RAM. If I have a host processor containing the image for the IWR device, can this be supplied at POR via UART or QSPI from the host directly? This configuration is not called out in the bootloader app note (perhaps I should be looking somewhere else). Thank you! 

  • 0
    TI__Mastermind 23725 points

    Hello,

    Are you referring to bootloader for IWR1642 device :   IWR1642 Bootloader Flow

    Current bootmodes support loading from QSPI in functional mode and flashing mode. As mentioned in basic bootloader flow.

    It also shows a way where boot over Uart can be achieved. 

    Please check latest SDK 3.x.x.x  where were provide an example implementation of alternate boot mode. Please start with user's guide which will point your to "secondary bootlloader" 

    Hope that helps with getting started, please let us know if there are more quesions.

    Thank you,

    Vaibhav

  • 0 in reply to Vaibhav Mahimkar
    TI__Mastermind 24305 points
    Hi Vaibhav,

    Thanks. for some reason the link I posted was broken when the post was made. I am also looking at the bootloader document. In figure 4 it looks like in functional mode (left path) with no flash present we do support a host processor sending an image over SPI. Is this understanding correct?
  • 0 in reply to Brandon08
    TI__Mastermind 21295 points
    Hello DEEP SEARCH,

    Yes, the device can be booted over SPI. Please see the details in section "2.2 Bootmode – SPI" in the doc where it describes the SPI boot mode. Please note the first sentence in that section: "In functional mode, if and only if the detection of the SDF fails (concluded by an invalid response to the SFDP command over the QSPI lines), the bootloader enters the SPI-based bootloading mode."

    Regards,
    John