Adds documentation for SPI boot. Signed-off-by: Jesse Taube <mr.bossman...@gmail.com> --- doc/board/nxp/imxrt1050-evk.rst | 41 +++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+)
diff --git a/doc/board/nxp/imxrt1050-evk.rst b/doc/board/nxp/imxrt1050-evk.rst index c1fb48f0cd..0838a04871 100644 --- a/doc/board/nxp/imxrt1050-evk.rst +++ b/doc/board/nxp/imxrt1050-evk.rst @@ -39,3 +39,44 @@ 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: + +First you will need to enable the following option: +CONFIG_IMX_CONFIG="board/freescale/imxrt1050-evk/imximage-nor.cfg" + +.. code-block:: bash + + $ make mrproper + $ make imxrt1050-evk_defconfig + $ make + +This will generate the SPL image called SPL and the u-boot.img. + +To boot from SPI flash you will need to provide a flash configuration block that is specific to your flash chip. +The flash config is 4K in size and is documented on page 217 of the imxrt1050RM. + +I took my FLASH config from a binary made from MCUexpresso IDE. +The truncate command should pad the spl with zeros till the value from CONFIG_SYS_UBOOT_BASE. + +.. code-block:: bash + + $ cp FLASH nor.bin + $ cat SPL >> nor.bin + $ truncate -s $((0x10000)) nor.bin + $ cat u-boot.img >> nor.bin + +- 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 flash the flash I used Mcuexpresso IDEs GUI flash tool -- 2.34.1
