Note that the layout of the Flash partitions has changed in Release 2.1.x. If you are using the JFFS2 partition (/dev/mtd2), preserve it contents (for example, using NFS mount) before running the upgrade.
- Reboot and stop at the U-Boot prompt:
U-Boot 2010.03-cortexm-1.14.4 (Jun 22 2016 - 16:45:51)
CPU : STM32F7 (Cortex-M7)
Freqs: SYSCLK=200MHz,HCLK=200MHz,PCLK1=50MHz,PCLK2=100MHz
Board: STM32F7 SOM Rev 1.A, www.emcraft.com
DRAM: 32 MB
Flash: 16 MB
In: serial
Out: serial
Err: serial
Net: STM32_MAC
Hit any key to stop autoboot: 0
STM32F7-SOM>
- Print the current U-Boot environment. This information will be needed at the later steps.
STM32F7-SOM> printenv
bootargs=stm32_platform=stm32f7-som console=ttyS0,115200 panic=10
bootcmd=run flashboot
bootdelay=3
baudrate=115200
hostname=stm32f7-som
loadaddr=0xC0007FB4
args=setenv bootargs stm32_platform=stm32f7-som console=ttyS0,115200 panic=10
addip=setenv bootargs ${bootargs}
ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:eth0:off
flashaddr=60020000
envmaddr=08040000
stdin=serial
netboot=tftp ${image};run args addip;bootm
envmboot=run args addip;bootm ${envmaddr}
envmupdate=tftp ${image};cptf ${envmaddr} ${loadaddr} ${filesize}
flashboot=run args addip;bootm ${flashaddr}
update=tftp ${image};prot off ${flashaddr} +${filesize};era ${flashaddr} +${filesize};cp.b ${loadaddr} ${flashaddr} ${filesize};setenv kernelsize ${filesize};setenv filesize; setenv fileaddr;saveenv
ethact=STM32_MAC
ipaddr=172.17.44.31
serverip=172.17.0.1
kernelsize=20A158
image=my.uImage
ethaddr=3C:FB:96:02:04:5B
Environment size: 900/4092 bytes
STM32F7-SOM>
- Update the U-Boot image. The system will reset. Stop at the U-Boot prompt.
STM32F7-SOM> tftp psl/stmf7/cm-2.1.0/u-boot.bin
Auto-negotiation...completed.
STM32_MAC: link UP (100/Half)
Using STM32_MAC device
TFTP from server 172.17.0.1; our IP address is 172.17.44.31
Filename 'psl/stmf7/cm-2.1.0/u-boot.bin'.
Load address: 0xc0007fb4
Loading: #########
done
Bytes transferred = 119416 (1d278 hex)
STM32F7-SOM> cptf 0x08000000 ${loadaddr} $(filesize} 1
cptf: Updating eNVM. Please wait ...
U-Boot 2010.03-cortexm-2.1.0 (Sep 19 2016 - 11:18:48)
CPU : STM32F7 (Cortex-M7)
Freqs: SYSCLK=200MHz,HCLK=200MHz,PCLK1=50MHz,PCLK2=100MHz
Board: STM32F7 SOM Rev 1.A, www.emcraft.com
DRAM: 32 MB
Flash: 16 MB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: STM32_MAC
Hit any key to stop autoboot: 0
STM32F7-SOM>
Note that the message about the bad CRC is expected. Starting this release, U-Boot keeps its environment in the NOR Flash, rather than in the on-chip Flash of the STM32, as before. Consequently, when booted for the first time the updated U-Boot doesn't find the environment in the NOR Flash and prints the message indicating that the default environment, integrated in the U-Boot image, is used.
- Configure networking in U-Boot (use the values saved with printenv above). Don't forget to restore the MAC address:
STM32F7-SOM> setenv ipaddr 172.17.44.31
STM32F7-SOM> setenv serverip 172.17.0.1
STM32F7-SOM> setenv ethaddr 3C:FB:96:02:04:5B
STM32F7-SOM> savee
Saving Environment to Flash...
. done
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
. done
Protected 1 sectors
STM32F7-SOM>
- Check and update the load address in RAM, if it differs from 0xC0007FB4:
STM32F7-SOM> print loadaddr
loadaddr=0xC0007FC0
STM32F7-SOM> setenv loadaddr 0xC0007FB4
STM32F7-SOM> savee
Saving Environment to Flash...
. done
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
. done
Protected 1 sectors
STM32F7-SOM>
- Update the Linux image in the NOR Flash:
STM32F7-SOM> setenv image psl/stmf7/cm-2.1.0/rootfs.uImage
STM32F7-SOM> run update
Auto-negotiation...completed.
STM32_MAC: link UP (100/Half)
Using STM32_MAC device
TFTP from server 172.17.0.1; our IP address is 172.17.44.31
Filename 'psl/stmf7/cm-2.1.0/rootfs.uImage'.
Load address: 0xc0007fb4
Loading: #################################################################
#################################################################
#################################################################
done
Bytes transferred = 5773923 (581a63 hex)
............................................. done
Un-Protected 45 sectors
............................................. done
Erased 45 sectors
Copy to Flash... done
Saving Environment to Flash...
. done
Un-Protected 1 sectors
Erasing Flash...
. done
Erased 1 sectors
Writing to Flash... done
. done
Protected 1 sectors
STM32F7-SOM>
- Reset and boot the new Linux image:
U-Boot 2010.03-cortexm-2.1.0 (Sep 19 2016 - 11:18:48)
CPU : STM32F7 (Cortex-M7)
Freqs: SYSCLK=200MHz,HCLK=200MHz,PCLK1=50MHz,PCLK2=100MHz
Board: STM32F7 SOM Rev 1.A, www.emcraft.com
DRAM: 32 MB
Flash: 16 MB
In: serial
Out: serial
Err: serial
Net: STM32_MAC
Hit any key to stop autoboot: 0
## Booting kernel from Legacy Image at 60020000 ...
Image Name: Linux-4.2.0-cortexm-2.1.0
Image Type: ARM Linux Multi-File Image (uncompressed)
Data Size: 5773859 Bytes = 5.5 MB
Load Address: c0008000
Entry Point: c0008001
Contents:
Image 0: 5756576 Bytes = 5.5 MB
Image 1: 17271 Bytes = 16.9 kB
Verifying Checksum ... OK
## Flattened Device Tree from multi component Image at 60020000
Booting using the fdt at 0x6059d6ec
Loading Multi-File Image ... OK
OK
Loading Device Tree to c1ff8000, end c1fff376 ... OK
Starting kernel ...
Booting Linux on physical CPU 0x0
Linux version 4.2.0-cortexm-2.1.0 (
This e-mail address is being protected from spambots. You need JavaScript enabled to view it
) (gcc version 4.4.1 (Sourcery G++ Lite 2010q1-189) ) #2 Mon Sep 19 11:19:44 +0400 2016
...
Freeing unused kernel memory: 2652K (c02c5000 - c055c000)
init started: BusyBox v1.17.0 (2016-09-19 11:07:14 +0400)
/ #
