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TMS320F28027: SPI bootloader Issue

Matthew Mott
Prodigy 600 points
Part Number: TMS320F28027


My customer is trying to use the SPI bootloader on the TMS320F28027 however, it's not working. It appears to read the new image out of SPI flash but it's not updating the internal flash. Any suggestions would be appreciated.

  • 0
    TI__Guru 50611 points

    Hi Matthew,

    We are assigning to subject matter expert. Lot of engineers are taking off due to holiday break, so please expect delay in response.

    Regards, Santosh

  • 0
    TI__Genius 17370 points

    this has to be debugged step by step.

    Are you able to see the data getting transmitted over the lines - are you checking the same with oscilloscope ?

  • 0 in reply to Baskaran Chidambaram
    TI__Prodigy 600 points

    Yes after reboot the data is read from SPI flash as expected then it jumps to the entry point. However, the flash has not been erased or updated.

     

    From: TMS320F2802x Technical Reference Manual. 

    • SPI EEPROM or Flash boot mode (SPI-A) Jump to SPI is available in stand-alone mode as a programmed Get Mode option. 

    That is, to configure a device for SPI boot in stand-alone mode, the OTP_KEY and OTP_BMODE locations must be programmed for SPI_BOOT and the boot mode pins configured for the Get Mode boot option. 

    SPI boot is also available as an emulation boot option. In this mode, the boot ROM will load code and data into on-chip memory from an external SPI EEPROM or SPI flash via the SPI-A port.  

     

    My setting:

    OTP_KEY = 0x55AA 

    OTP_BMODE = 0x004 (SPI_BOOT)

     

    Can the SPI_BOOT in ROM write directly to the f2802x internal flash? 

  • 0 in reply to Matthew Mott
    TI__Genius 17370 points

    the SPI Boot in ROM wont write directly to flash. The 2nd level bootloader (called kernel) which has to take care of programming the flash.