OpenWrt master 运行出错

[fanck0605]

自己用 OpenWrt master 的源码编译的，无法正常启动。
是不是依赖没装全，麻烦大佬看一下。

root@OpenWrt:~# /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT
I2C: Failed to open device |: No such file or directory
(Main)i2c-2: OOPS! Something Went Wrong

[NateLol]

已merge PR

[fanck0605]

@NateLol
这是似乎是另一个问题😆，那个 pr 只解决了 luci 显示。
看了一下报错，应该是这两行的错误信息。

https://github.com/NateLol/luci-app-oled/blob/master/src/I2C_Library/I2C.c#L271
https://github.com/NateLol/luci-app-oled/blob/master/src/Example_Code/Main.c#L73

[NateLol]

ssh上去试试这个

i2cdetect -y 0

看会不会出来3c

没有的话就有可能依赖没安全。

还可以去看是否有这个目录/dev/i2c-0

[fanck0605]

没有 i2c-0，只找到了个 i2c-1

root@OpenWrt:~# i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory
root@OpenWrt:~# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         
root@OpenWrt:~# ls /dev | grep i2c
i2c-1
root@OpenWrt:~# 

---

@NateLol 应该是我的依赖问题，我再看看

[NateLol]

因为这个程序中是写死了的，一定要是/dev/i2c-0

[fanck0605]

jayanta525 的 openwrt 的 kernel config 里一股脑把 i2c 驱动全选了，所以用着没问题。

我用的是 blocktrron 的 openwrt 编译时，需要手动添加 kmod-i2c-xxx

[yoyojacky]

Hi, I have same issue, and am using Raspberry Pi CM4 router board.
OS information:

pi@upstest:~ $ ssh root@192.168.1.1
The authenticity of host '192.168.1.1 (192.168.1.1)' can't be established.
ED25519 key fingerprint is SHA256:NWZsaa/lvdIosladk3AmESFtMX907u7mhEEw1qZQNAY.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.1' (ED25519) to the list of known hosts.


BusyBox v1.34.0 (2021-09-05 21:52:35 UTC) built-in shell (ash)

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 OpenWrt SNAPSHOT, r0-46dec99
 -----------------------------------------------------
=== WARNING! =====================================
There is no root password defined on this device!
Use the "passwd" command to set up a new password
in order to prevent unauthorized SSH logins.
--------------------------------------------------

and I have already compile the kernel with selected i2c driver.

root@OpenWrt:~# dmesg |grep i2c
[    6.937830] i2c /dev entries driver
root@OpenWrt:~# lsmod |grep i2c
i2c_algo_bit           16384  1 i2c_gpio
i2c_bcm2835            16384  0
i2c_dev                20480  0
i2c_gpio               16384  0
i2c_mux                16384  1 i2c_mux_gpio
i2c_mux_gpio           16384  0
i2c_smbus              16384  0
root@OpenWrt:~# /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT
I2C: Failed to open device |: No such file or directory
(Main)i2c-2: OOPS! Something Went Wrong
root@OpenWrt:~# i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory
root@OpenWrt:~# i2cdetect -y 1
Error: Could not open file `/dev/i2c-1' or `/dev/i2c/1': No such file or directory

root@OpenWrt:~#  modprobe i2c-dev
root@OpenWrt:~# opkg list | grep i2c
i2c-tools - 4.3-1
kmod-i2c-algo-bit - 5.10.64-1
kmod-i2c-bcm2835 - 5.10.64-1
kmod-i2c-core - 5.10.64-1
kmod-i2c-gpio - 5.10.64-1
kmod-i2c-mux - 5.10.64-1
kmod-i2c-mux-gpio - 5.10.64-1
kmod-i2c-smbus - 5.10.64-1
libi2c - 4.3-1

and what i need to add into the kernel ? Could you please help me out?

[fanck0605]

For NanoPi R2S the following patch needs to be applied to activate i2c-0.

https://github.com/immortalwrt/immortalwrt/blob/e26c0c7b3152c65c4e9eebd92b7ebd961c28711c/target/linux/rockchip/patches-5.4/201-rockchip-rk3328-add-i2c0-controller-for-nanopi-r2s.patch

Raspberry Pi CM4 may also require a similar patch.

I don't know much about this issue either. I'm sorry that I can't be of more help to you.

[yoyojacky]

For NanoPi R2S the following patch needs to be applied to activate i2c-0.

https://github.com/immortalwrt/immortalwrt/blob/e26c0c7b3152c65c4e9eebd92b7ebd961c28711c/target/linux/rockchip/patches-5.4/201-rockchip-rk3328-add-i2c0-controller-for-nanopi-r2s.patch

Raspberry Pi CM4 may also require a similar patch.

I don't know much about this issue either. I'm sorry that I can't be of more help to you.

thanks for your reply, and i have tried another way. and it seems works, but it always show "OLED is not working " in LuCI interface in browser.

I have tried to add this dtoverlay=i2c-gpio,i2c_gpio_sda=2,i2c_gpio_scl=3,i2c_gpio_delay_ us=2,bus=1 to /boot/config.txt and reboot my Raspberry Pi CM4.
now, i can detect the oled 0.91 display 's address via i2cdetec -y 1
but it still not working well.

root@OpenWrt:~# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- 3c -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

when i ran /usr/bin/oled 0 0 1 1 0 60 0 0 0 0 0 0 0 0 0 0 0 1 OPENWRT command to test it still no luck.

[yoyojacky]

This program will only use i2c-0, which is written in the source code. If you connect the OLED to i2c-1, you need to modify the source code.

luci-app-oled/src/Example_Code/Main.c

Line 67 in 8607abf

if(init_i2c_dev(I2C_DEV0_PATH, SSD1306_OLED_ADDR) == 0)

  
 
     /* Initialize I2C bus and connect to the I2C Device */
-    if(init_i2c_dev(I2C_DEV0_PATH, SSD1306_OLED_ADDR) == 0)
+    if(init_i2c_dev(I2C_DEV1_PATH, SSD1306_OLED_ADDR) == 0)
     {
         printf("(Main)i2c-2: Bus Connected to SSD1306\r\n");
     }

I2C_DEVx_PATH is defined here

luci-app-oled/src/I2C_Library/I2C.h

Line 42 in 8607abf

#define I2C_DEV0_PATH "/dev/i2c-0"

thanks for your tips, I have already change the test command to :

/usr/bin/oled 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 60 0 1 openwrt 1

and it works.


The key parameters is to change the /boot/config.txt file and add:

dtoverlay=i2c-gpio,i2c_gpio_sda=2,i2c_gpio_scl=3,i2c_gpio_delay_us=2,bus=1

and BTW, need to change the permission of the etc/init.d/oled from 644 to 755. and restart /etc/init.d/oled restart.
and save it, reboot CM4, it will works fine.