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@@ -22,13 +22,14 @@ If the eMMC has already a U-Boot flashed with DFU support then
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the user can go to step 2 below in order to update U-Boot.
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Put pico board in USB download mode (refer to the document
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-http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf page 15)
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+http://www.wandboard.org/images/hobbit/hobbitboard-imx6ul-reva1.pdf
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+page 15).
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-Connect a USB to serial adapter between the host PC and pico
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+Connect a USB to serial adapter between the host PC and pico.
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-Connect a USB cable between the OTG pico port and the host PC
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+Connect a USB cable between the OTG pico port and the host PC.
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-Open a terminal program such as minicom
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+Open a terminal program such as minicom.
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Copy SPL and u-boot.img to the imx_usb_loader folder.
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@@ -40,7 +41,7 @@ Load the u-boot.img binary via USB:
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$ sudo ./imx_usb u-boot.img
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-Then U-Boot should start and its messages will appear in the console program.
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+Then U-Boot starts and its messages appear in the console program.
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Use the default environment variables:
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@@ -49,7 +50,8 @@ Use the default environment variables:
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2. Flashing U-Boot into the eMMC
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-Run the DFU command:
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+Run the DFU agent so we can flash the new images using dfu-util tool:
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+
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=> dfu 0 mmc 0
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Flash SPL and u-boot.img into the eMMC running the following commands on a PC:
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@@ -58,14 +60,8 @@ $ sudo dfu-util -D SPL -a spl
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$ sudo dfu-util -D u-boot.img -a u-boot
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-Then on the U-Boot prompt the following message should be seen after a
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-successful upgrade:
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-
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-#DOWNLOAD ... OK
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-Ctrl+C to exit ...
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-
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Remove power from the pico board.
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-Put pico board into normal boot mode
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+Put pico board into normal boot mode.
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Power up the board and the new updated U-Boot should boot from eMMC.
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Otavio Salvador