Hello,

 

I try to communicate on UART3 (pin 11/13) just TTL, but cannot see any data on the lines.

After first attempt i added overlays=uart3 to /boot/armbianEnv.txt  and rebooted the system.

oot@orangepioneplus:~# cat /boot/armbianEnv.txt
verbosity=1
bootlogo=false
console=both
disp_mode=1920x1080p60
overlay_prefix=sun50i-h6
rootdev=UUID=d7bd3629-b17f-4c85-9031-909157a0ce7e
rootfstype=ext4
overlays=uart3
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u

Then i also executed update-initramfs -u and rebooted the board.

 

None of these are helped

 

I wonder what i am doing wrong?

 

I see the following in the logs:

root@orangepioneplus:~# dmesg | egrep --color 'serial|ttyS'
[    1.944312] printk: console [ttyS0] disabled
[    1.944394] 5000000.serial: ttyS0 at MMIO 0x5000000 (irq = 31, base_baud = 1500000) is a 16550A
[    1.944599] printk: console [ttyS0] enabled
[    1.945269] sun50i-h6-pinctrl 300b000.pinctrl: pin-119 (5000c00.serial) status -517
[    1.945284] dw-apb-uart 5000c00.serial: Error applying setting, reverse things back
[    1.971491] sun50i-h6-pinctrl 300b000.pinctrl: pin-119 (5000c00.serial) status -517
[    1.971505] dw-apb-uart 5000c00.serial: Error applying setting, reverse things back
[    1.973846] sun50i-h6-pinctrl 300b000.pinctrl: pin-119 (5000c00.serial) status -517
[    1.973860] dw-apb-uart 5000c00.serial: Error applying setting, reverse things back
[    1.975764] sun50i-h6-pinctrl 300b000.pinctrl: pin-119 (5000c00.serial) status -517
[    1.975778] dw-apb-uart 5000c00.serial: Error applying setting, reverse things back
[    2.376127] sun50i-h6-pinctrl 300b000.pinctrl: pin-119 (5000c00.serial) status -517
[    2.376141] dw-apb-uart 5000c00.serial: Error applying setting, reverse things back
[    2.401927] 5000c00.serial: ttyS3 at MMIO 0x5000c00 (irq = 32, base_baud = 1500000) is a 16550A
[    5.035583] systemd[1]: Created slice system-serial\x2dgetty.slice.

I think it is looks okey.

Also i can connect to UART0.

During testing i used the same setting on minicom as UART0
 

    +-----------------------------------------------------------------------+
    | A -    Serial Device      : /dev/ttyS3                                |
    | B - Lockfile Location     : /var/lock                                 |
    | C -   Callin Program      :                                           |
    | D -  Callout Program      :                                           |
    | E -    Bps/Par/Bits       : 9600 8N1                                  |
    | F - Hardware Flow Control : No                                        |
    | G - Software Flow Control : No                                        |
    |                                                                       |
    |    Change which setting?                                              |
    +-----------------------------------------------------------------------+

 

Also just done a same test with a USB-serial adapter which is worked so i can rule out at least problem with my testing mythology.

 

Thank you!

 

50 minutes ago, ebalcsk said:

I try to communicate on UART3

Can you check DT if pinctrl-0 is present in UART3 node ?

 

You can verify using this :

ll /proc/device-tree/soc/serial@5000c00

(In my old 5.9 build, I see that they are missing and only UART0 has its pinctl-0 handle.)

 

If missing, you can decompile DTB into DTS, edit DTS to add "pinctrl-0 = <phandle>;" where phandle can be found in "uart3-pins" node ...

it looks like exist:

root@orangepioneplus:~# ll /proc/device-tree/soc/serial@5000c00
total 0
-r--r--r-- 1 root root  8 Feb 10 21:50 clocks
-r--r--r-- 1 root root 17 Feb 10 21:50 compatible
-r--r--r-- 1 root root 12 Feb 10 21:50 interrupts
-r--r--r-- 1 root root  7 Feb 10 21:50 name
-r--r--r-- 1 root root  4 Feb 10 21:50 phandle
-r--r--r-- 1 root root  4 Feb 10 21:50 pinctrl-0
-r--r--r-- 1 root root  8 Feb 10 21:50 pinctrl-names
-r--r--r-- 1 root root  8 Feb 10 21:50 reg
-r--r--r-- 1 root root  4 Feb 10 21:50 reg-io-width
-r--r--r-- 1 root root  4 Feb 10 21:50 reg-shift
-r--r--r-- 1 root root  8 Feb 10 21:50 resets
-r--r--r-- 1 root root  5 Feb 10 21:50 status
root@orangepioneplus:~#

 

2 minutes ago, ebalcsk said:

it looks like exist:

which kernel version ?

(because it seems that it still missing in 5.10 of @megous branch)

root@orangepioneplus:~# uname -r
5.10.12-sunxi64

10 minutes ago, ebalcsk said:

5.10.12-sunxi64

Could you check DTS directly by decompiling DTB ?

 

dtc -@ -I dtb -O dts -o /root/sun50i-h6-orangepi-one-plus.dts-5.10.12 /boot/dtb/allwinner/sun50i-h6-orangepi-one-plus.dtb

 

root@orangepioneplus:~# dtc -@ -I dtb -O dts -o /root/sun50i-h6-orangepi-one-plus.dts-5.10.12 /boot/dtb/allwinner/sun50i-h6-orangepi-one-plus.dtb
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@480000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@720000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@816000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@888000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1080000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1320000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1488000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1608000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1704000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (unit_address_vs_reg): /cpu-opp-table/opp@1800000000: node has a unit name, but no reg property
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (graph_child_address): /soc/tcon-top@6510000/ports/port@0: graph node has single child node 'endpoint@0', #address-cells/#size-cells are not necessary
/root/sun50i-h6-orangepi-one-plus.dts-5.10.12: Warning (graph_child_address): /soc/tcon-top@6510000/ports/port@4: graph node has single child node 'endpoint@0', #address-cells/#size-cells are not necessary
root@orangepioneplus:~#

 

sun50i-h6-orangepi-one-plus.dts-5.10.12

Hello

 

Sorry it was my fault

The IO PIN layout 180' was rotated. Used a wrong PIN.

 

Thank you for your help

3 hours ago, ebalcsk said:

Sorry it was my fault

Do you mean that UART3 is working fine ?

yes thank you