Tommy Tang

It works perfect. This forum is far better than many worldwide software company Thanks for your prompt reply.

for mainline kernel ``` Linux version 4.11.5-sun8i (root@devel) (gcc version 7.1.1 20170510 (Linaro GCC 7.1-2017.05) ) #11 SMP Fri Jun 23 20:03:23 CEST 2017 user@orangepipcplus:/boot/dtb$ dtc -I dtb sun8i-h3-orangepi-pc-plus.dtb -O dts |less uart1 { pins = "PG6", "PG7"; function = "uart1"; linux,phandle = <0x19>; phandle = <0x19>; }; uart1_rts_cts { pins = "PG8", "PG9"; function = "uart1"; linux,phandle = <0x48>; phandle = <0x48>; }; user@orangepipcplus:/boot/dtb$ ls -al /dev/ttyS* crw--w---- 1 root tty 4, 64 Jun 25 12:07 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Jun 25 12:07 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Jun 25 12:07 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Jun 25 12:07 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Jun 25 12:07 /dev/ttyS4 crw-rw---- 1 root dialout 4, 69 Jun 25 12:07 /dev/ttyS5 crw-rw---- 1 root dialout 4, 70 Jun 25 12:07 /dev/ttyS6 crw-rw---- 1 root dialout 4, 71 Jun 25 12:07 /dev/ttyS7 minicom with hardware flow disabled and software flow enabled │ A - Serial Device : /dev/ttyS1 │ │ 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 : Yes │ │ │ │ Change which setting? ``` Even connected pin 38 and 40, no characters are shown in local echo. Any steps (kernel or user layout) required to enable ttyS1.

for mainline kernel ``` Linux version 4.11.5-sun8i (root@devel) (gcc version 7.1.1 20170510 (Linaro GCC 7.1-2017.05) ) #11 SMP Fri Jun 23 20:03:23 CEST 2017 user@orangepipcplus:/boot/dtb$ ls -al /dev/ttyS* crw--w---- 1 root tty 4, 64 Jun 25 12:07 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Jun 25 12:07 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Jun 25 12:07 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Jun 25 12:07 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Jun 25 12:07 /dev/ttyS4 crw-rw---- 1 root dialout 4, 69 Jun 25 12:07 /dev/ttyS5 crw-rw---- 1 root dialout 4, 70 Jun 25 12:07 /dev/ttyS6 crw-rw---- 1 root dialout 4, 71 Jun 25 12:07 /dev/ttyS7 ``` Even connected pin 38 and 40, no characters are shown in local echo. Any steps (kernel or user layout) required to enable ttyS1.

My case is to change u-boot default resolution to 1024x768. The steps below configured successfully on orange pi pc plus and 10" hdmi monitor. 1. dd if=Armbian_5.25_Orangepipcplus_Debian_jessie_default_3.4.113.img of=/dev/sdb bs=1M 2. change root passwd add general user account nmtui to activate wifi internet connection 3. DEVICE_NAME=orangepipcplus apt-get update apt-get install -y linux-u-boot-${DEVICE_NAME}-dev \ linux-image-dev-sun8i \ linux-headers-dev-sun8i \ linux-dtb-dev-sun8i \ linux-jessie-root-${DEVICE_NAME} 4. connect serial console by esplink press any key to stop at u-boot prompt 5. setenv video-mode sunxi:1024x768-24@60,monitor=hdmi,hpd=0,edid=0 saveenv reset