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Update README

This commit is contained in:
Gregory Nutt 2013-11-16 13:00:49 -06:00
parent ad5e086625
commit 0187a60dc0
1 changed files with 23 additions and 11 deletions
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34
configs/pcduino-a10/README.txt
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@ -257,26 +257,38 @@ Booting NuttX from an SD card
1. Get the U-Boot sources for the pcDuino
$ git clone https://github.com/yuq/u-boot-sunxi.git
$ git clone https://github.com/yuq/u-boot-sunxi.git
2. Build U-Boot. We really only want the SPL program; this builds
the whole thing:
$ cd u-boot-sunxi
$ make pcduino CROSS_COMPILE=arm-none-eabi-
$ cd u-boot-sunxi
$ make pcduino CROSS_COMPILE=arm-none-eabi-
NOTES:
a. You may need to use a different tool prefix for the CROSS_COMPILE=
value, depending upon what toolchain you have installed and upon
which platform your are working.
b. When I try this on Cygwin, I get a make failure that is, apparently,
due to some script incompatibility.
At the conclusion of a success bin, you will find the u-boot binary
at ./u-boot.bin and the SPL binary at ./spl/sunxi-spl.bin
NOTES:
a. You may need to use a different tool prefix for the CROSS_COMPILE=
value, depending upon what toolchain you have installed and upon
which platform your are working.
b. When I try this on Cygwin, I get a make failure that is, apparently,
due to some script incompatibility.
3. Insert a FLASH stick. Use dmesg to get the name of the new USB
device. Make sure that it is not mounted, then (assuming that the
USB device is /dev/sdb):
$ sudo dd if=./spl/sunxi-spl.bin of=/dev/sdb bs=1024 seek=8
$ sudo dd if=nuttx.bin of=/dev/sdb bs=1024 seek=32
$ sudo dd if=./spl/sunxi-spl.bin of=/dev/sdb bs=1024 seek=8
$ sudo dd if=nuttx.bin of=/dev/sdb bs=1024 seek=32
4. Remove the FLASH stick from the host pc. Insert into the pcDuino
microSD slot. Reset the pcDuino and press any key to keep the
boot loader from starting Linux.
5. Enter the following commands to run NuttX:
fatls mmc 0x4a000000 nuttx.bin
go 0x4a000000
Reference: https://www.olimex.com/wiki/Bare_Metal_programming_A13#Stand_alone_program_running_with_uboot