Adds documentation for SPI boot.
Signed-off-by: Jesse Taube Mr.Bossman075@gmail.com --- doc/board/nxp/imxrt1050-evk.rst | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/doc/board/nxp/imxrt1050-evk.rst b/doc/board/nxp/imxrt1050-evk.rst index c1fb48f0cd..aca5071181 100644 --- a/doc/board/nxp/imxrt1050-evk.rst +++ b/doc/board/nxp/imxrt1050-evk.rst @@ -39,3 +39,32 @@ switch label numbers reference). The USB console connector is the one close the ethernet connector
- Insert the micro SD card in the board, power it up and U-Boot messages should come up. + + +How to use U-Boot with SPI flash on NXP i.MXRT1050 EVK +------------------------------------------------------ + +- Build U-Boot for i.MXRT1050 EVK: + +.. code-block:: bash + + $ make mrproper + $ make imxrt1050-evk_spi_defconfig + $ make + +This will generate SPL, uboot.img, fspi_header.bin, and the final image (flash.bin). + +To boot from SPI flash on other boards you may need to change the flash header config, +that is specific to your flash chip, in Kconfig. +The flash config is 4K in size and is documented on page 217 of the imxrt1050RM. + +- Jumper settings:: + + SW7: 0 1 1 0 + +where 0 means bottom position and 1 means top position (from the +switch label numbers reference). + +- Connect the USB cable between the EVK and the PC for the console. + +- Use either JTAG or SWD to write `flash.bin` to the NOR. I used Mcuexpresso IDE's GUI flash tool.