You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.4 KiB
116 lines
3.4 KiB
2 years ago
|
SiFive HiFive Unleashed
|
||
|
|
=======================
|
||
|
|
|
||
|
|
This file describes how to use the pre-defined Buildroot
|
||
|
|
configuration for the SiFive HiFive Unleashed board.
|
||
|
|
|
||
|
|
Further information about the HiFive Unleashed board can be found
|
||
|
|
at https://www.sifive.com/boards/hifive-unleashed
|
||
|
|
|
||
|
|
Building
|
||
|
|
========
|
||
|
|
|
||
|
|
Configure Buildroot using the default board configuration:
|
||
|
|
|
||
|
|
$ make hifive_unleashed_defconfig
|
||
|
|
|
||
|
|
Customise the build as necessary:
|
||
|
|
|
||
|
|
$ make menuconfig
|
||
|
|
|
||
|
|
Start the build:
|
||
|
|
|
||
|
|
$ make
|
||
|
|
|
||
|
|
Result of the build
|
||
|
|
===================
|
||
|
|
|
||
|
|
Once the build has finished you will have the following files:
|
||
|
|
|
||
|
|
output/images/
|
||
|
|
+-- boot.scr
|
||
|
|
+-- fw_dynamic.bin
|
||
|
|
+-- fw_dynamic.elf
|
||
|
|
+-- fw_jump.bin
|
||
|
|
+-- fw_jump.elf
|
||
|
|
+-- hifive-unleashed-a00.dtb
|
||
|
|
+-- Image
|
||
|
|
+-- rootfs.cpio
|
||
|
|
+-- rootfs.ext2
|
||
|
|
+-- rootfs.ext4
|
||
|
|
+-- rootfs.tar
|
||
|
|
+-- sdcard.img
|
||
|
|
+-- u-boot.bin
|
||
|
|
+-- u-boot.itb
|
||
|
|
+-- u-boot-spl.bin
|
||
|
|
|
||
|
|
|
||
|
|
Creating a bootable SD card with genimage
|
||
|
|
=========================================
|
||
|
|
|
||
|
|
By default Buildroot builds a SD card image for you. All you need to do
|
||
|
|
is dd the image to your SD card, which can be done with the following
|
||
|
|
command on your development host:
|
||
|
|
|
||
|
|
$ sudo dd if=output/images/sdcard.img of=/dev/sdb bs=4096
|
||
|
|
|
||
|
|
The above example command assumes the SD card is accessed via a USB card
|
||
|
|
reader and shows up as /dev/sdb on the host. Adjust it accordingly per
|
||
|
|
your actual setup.
|
||
|
|
|
||
|
|
Booting the SD card on the board
|
||
|
|
================================
|
||
|
|
|
||
|
|
Make sure that the all DIP switches are set to the off position for
|
||
|
|
default boot mode (MSEL mode = 1011), insert the SD card and power
|
||
|
|
up the board.
|
||
|
|
|
||
|
|
Connect the USB cable and open minicom (/dev/ttyUSB1, 115200, 8N1).
|
||
|
|
|
||
|
|
See the 'SiFive HiFive Unleashed Getting Started Guide' for
|
||
|
|
more details (https://www.sifive.com/documentation).
|
||
|
|
|
||
|
|
You will get a warning reported by fdisk when you examine the SD card.
|
||
|
|
This is because the genimage_sdcard.cfg file doesn't specify the SD card
|
||
|
|
size (as people will naturally have different sized cards), so the
|
||
|
|
secondary GPT header is placed after the rootfs rather than at the end
|
||
|
|
of the disk where it is expected to be.
|
||
|
|
|
||
|
|
You will see something like this at boot time:
|
||
|
|
|
||
|
|
[ 0.989458] mmc0: host does not support reading read-only switch, assuming write-enable
|
||
|
|
[ 0.996772] mmc0: new SDHC card on SPI
|
||
|
|
[ 1.001634] mmcblk0: mmc0:0000 SD8GB 7.28 GiB
|
||
|
|
[ 1.038079] GPT:Primary header thinks Alt. header is not at the end of the disk.
|
||
|
|
[ 1.044759] GPT:52389 != 15264767
|
||
|
|
[ 1.048051] GPT:Alternate GPT header not at the end of the disk.
|
||
|
|
[ 1.054015] GPT:52389 != 15264767
|
||
|
|
[ 1.057323] GPT: Use GNU Parted to correct GPT errors.
|
||
|
|
[ 1.062479] mmcblk0: p1 p2 p3
|
||
|
|
|
||
|
|
|
||
|
|
Creating a bootable SPI flash with genimage
|
||
|
|
===========================================
|
||
|
|
|
||
|
|
Adjust Buildroot configuration by:
|
||
|
|
|
||
|
|
$ make menuconfig
|
||
|
|
|
||
|
|
Change "System configuration" -> "Extra arguments passed to custom scripts"
|
||
|
|
value to "-c board/sifive/hifive-unleashed/genimage_spi-nor.cfg", save the
|
||
|
|
configuration and build. This creates a output/images/spi-nor.img that can
|
||
|
|
be programmed to the on-board SPI flash.
|
||
|
|
|
||
|
|
Boot the board from the SD card prepared above, stop the U-Boot auto boot,
|
||
|
|
and type the following commands to program the whole SPI flash:
|
||
|
|
|
||
|
|
=> tftp 82000000 output/images/spi-nor.img
|
||
|
|
=> sf probe
|
||
|
|
=> sf update 82000000 0 2000000
|
||
|
|
|
||
|
|
Booting the SPI flash on the board
|
||
|
|
==================================
|
||
|
|
|
||
|
|
Make sure that the all DIP switches are set to the off position for
|
||
|
|
default boot mode (MSEL mode = 0110) to boot from SPI flash.
|