This is the documentation for the latest (main) development branch of mcuxpresso sdk. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Boot or Run from Flash

Boot from Flash is straight forward when using IAR environment. SDK provides either two or four different build configurations based on the project: debug (from SRAM)/ release (from SRAM)/ flash_debug/ flash_release. Flash configurations use different memory map in project linker options. For details, see Figure 1.

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To enable booting from flash, change the ISP mode/ SW5 switches on the EVK.

If using MCUXpresso/ armgcc build environment, note that by default build environment is set to boot from flash. Using MCUXpresso as an example:

  1. Make sure to use the latest version of MCUXpresso.

  2. Import the SDK examples.

  3. Once completed, double click the last file/ J-Link Debug.

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  1. Launch to modify J-Link debugger setting.

  2. Make sure to deselect Reset before running. This helps the flash-based program get into main function.

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  • Make sure to:

    • Modify DSP_IMAGE_COPY_TO_RAM and Define to 1 in Project settings > C/C++ General > Paths and Symbols > Symbols.

    • Have the right compilation flag as C/C++. Compilation flags do not work on *.S files.

    • Have #define DSP_IMAGE_COPY_TO_RAM 1 as the first line of source/incbin.S to include the DSP binaries.

    • Use the correct DSP binaries at correct path (must be release binaries).

    • Provide the right image path to incbin.S.

  • To run/boot from flash, make sure that the board is set to FlexSPI flash boot mode (ISP2: ISP1: ISP0 = ON, OFF, ON).

Parent topic:HiFi4 Boot Loader and Memory Map