Openwrt other considerations

http://blog.csdn.net/u013177084/article/details/77115088

https://wenku.baidu.com/view/efb373ab50e2524de4187e1a.html

Other versions of openwrt

git@github.com:qingkongwuxian/openwrt-u2.git

https://github.com/WalkWifi/lede-u2.git

https://github.com/WRTnode/openwrt.git
wget http://d.wrtnode.com/sdk/sdk.tar.bz2

git clone failed

由于网络环境的不同，很经常出现https不能clone,git可以clone

通过https://git.openwrt.org/project/rpcd.git clone一直失败，改成git

package/system/rpcd/Makefile

 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL=$(OPENWRT_GIT)/project/rpcd.git
+PKG_SOURCE_URL=git://git.openwrt.org/project/rpcd.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)
 PKG_SOURCE_VERSION:=73aea9b8b621a1ce034bc6ee00c9d058a40c8a3d
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz

make succeed but does not generate openwrt-ramips-mt7628-mt7628-squashfs-sysupgrade.bin

ralink/Kconfig:206:warning: 'RT_FIRST_CARD': number is invalid
ralink/Kconfig:207:warning: 'RT_FIRST_CARD': number is invalid
ralink/Kconfig:208:warning: 'RT_FIRST_CARD': number is invalid
ralink/Kconfig:221:warning: 'RT_SECOND_CARD': number is invalid
ralink/Kconfig:222:warning: 'RT_SECOND_CARD': number is invalid
ralink/Kconfig:223:warning: 'RT_SECOND_CARD': number is invalid
ralink/Kconfig:224:warning: 'RT_SECOND_CARD': number is invalid
.config:822:warning: override: DEFAULT_NOOP changes choice state
*
* Restart config...
*
*
* Machine selection
*
System type
  1. Ralink MT7620 board (RALINK_MT7620)
  2. Ralink MT7621 board (RALINK_MT7621)
> 3. Ralink MT7628 board (RALINK_MT7628)
choice[1-3]: 3
Soc Hardware Type
  1. MT7628-FPGA (MT7628_FPGA)
> 2. MT7628-ASIC (MT7628_ASIC)
choice[1-2]: 2
DRAM Size
  1. 8M (RT2880_DRAM_8M)
  2. 16M (RT2880_DRAM_16M)
  3. 32M (RT2880_DRAM_32M)
> 4. 64M (RT2880_DRAM_64M)
  5. 128M (RT2880_DRAM_128M)
  6. 256M (RT2880_DRAM_256M)
choice[1-6]: 4
Flash Type
> 1. SPI (MTD_SPI_RALINK)
choice[1]: 1
Dual Image (DUAL_IMAGE) [N/y] n
Kernel NVRAM (KERNEL_NVRAM) [Y/n] y
Root File System Type
  1. RootFS_in_RAM (RT2880_ROOTFS_IN_RAM)
> 2. RootFS_in_FLASH (RT2880_ROOTFS_IN_FLASH)
choice[1-2]: 2
No Padding between Kernel and RootFS (ROOTFS_IN_FLASH_NO_PADDING) [N/y] n
MTD Kernel Partition Size (Unit:Bytes) (MTD_KERNEL_PART_SIZ) [0xD0000] (NEW) Ralink Hardware Timer0/Timer1 (RALINK_TIMER) [N/m/y] n
Ralink CPU Sleep mode (RALINK_CPUSLEEP) [N/y] n
Ralink System Tick Counter (RALINK_SYSTICK) [N/y] n
#
# configuration written to .config
#
make[5]: Leaving directory `/home/linye/openwrt-3.10.14/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7628/linux-3.10.14-p112871'
make[5]: Entering directory `/home/linye/openwrt-3.10.14/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7628/linux-3.10.14-p112871'
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CC      scripts/mod/devicetable-offsets.s
  GEN     scripts/mod/devicetable-offsets.h
  HOSTCC  scripts/mod/file2alias.o
  HOSTLD  scripts/mod/modpost
  CC [M]  drivers/char/i2c_drv.o
drivers/char/i2c_drv.c: In function 'i2cdrv_ioctl':
drivers/char/i2c_drv.c:1111:3: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long unsigned int' [-Wformat=]
   printk("i2c clkdiv = %d\n",clkdiv_value);
   ^
  Building modules, stage 2.
  MODPOST 65 modules
  LD [M]  drivers/char/i2c_drv.ko
make[5]: Leaving directory `/home/linye/openwrt-3.10.14/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7628/linux-3.10.14-p112871'
touch /home/linye/openwrt-3.10.14/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7628/linux-3.10.14-p112871/.modules
make -C image compile TARGET_BUILD=
make[5]: Entering directory `/home/linye/openwrt-3.10.14/target/linux/ramips/image'
make[5]: `compile' is up to date.
make[5]: Leaving directory `/home/linye/openwrt-3.10.14/target/linux/ramips/image'
make[4]: Leaving directory `/home/linye/openwrt-3.10.14/target/linux/ramips'
make[3]: Leaving directory `/home/linye/openwrt-3.10.14/target/linux'
make[2]: Leaving directory `/home/linye/openwrt-3.10.14'
make[2]: Entering directory `/home/linye/openwrt-3.10.14'
rm -rf /home/linye/openwrt-3.10.14/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/root-ramips
make[2]: Leaving directory `/home/linye/openwrt-3.10.14'
make[2]: Entering directory `/home/linye/openwrt-3.10.14'
make[3]: Entering directory `/home/linye/openwrt-3.10.14/package/libs/toolchain'

Looking at openwrt-sdk / target / linux / ramips / image / Makefile, we can see that the SDK can support a maximum of 32M flash, the default selection is 8M, because the size of the image exceeds 8M due to the addition of many software packages, so sysupgrade.bin cannot be generated. Change the default Default8M to Default16M.

Image/Build/Profile/MT7628=$(call BuildFirmware/Default8M/$(1),$(1),mt7628,MT7628)

Change to

Image/Build/Profile/MT7628=$(call BuildFirmware/Default16M/$(1),$(1),mt7628,MT7628)

Change the hardware to 8Mflash
https://blog.csdn.net/zhongvv/article/details/40343465

最后把703N_8M.bin写入8M flash，再把这个flash焊在板上即可。
分析：
1.更新固件不会更新art和uboot
2.固件不会有4M或者8M之分，但如果固件大小超过了4M，必须使用8M的flash。
3.uboot能够自动识别4M或是8M flash。但要求：
当使用4M flash时， art
存在地址为0x3f0000，长度为64K连续空间中
使用 8M flash，art存在0x7f0000，长度为64K连续空间中。
4.不管是4M还是8M flash boot的起始地址相同

Creator_Ly

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Openwrt other considerations

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