Guest Posted August 12, 2020 Share Posted August 12, 2020 In order to review the Tinker Board boot logs via serial console, I set up armbianEnv.txt to get the logs. But Armbian didn't output anything. Can anyone tell me what is wrong? As long as I reviewed boot.cmd, the serial port was assigned to /dev/ttyS2. So I used UART2 GPIO pins (GP7C7 for TX, GP7C6 for RX) to interact. (snip) if test "${console}" = "serial" || test "${console}" = "both"; then setenv consoleargs "console=ttyS2,115200n8 ${consoleargs}"; fi (snip) The barudrate is 115200. Of course, I re-checked my connection between USB-UART serial cable and UART2 GPIO pins (USB-UART RX to GP7C7TX, USB-UART TX to GP7C6 RX). Any information is helpful and appreciated. Thanks. ---- Referenced Doc: https://docs.armbian.com/User-Guide_Allwinner_overlays/#example-bootarmbianenvtxt-contents my armbianEnv.txt: I added console=serial. verbosity=1 console=serial overlay_prefix=rockchip overlays=i2c1 i2c4 spi2 spidev2 uart1 uart2 rootdev=UUID=(stripped) rootfstype=ext4 usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u USB UART Cable: FTDI TTL-232R-3V3 Board Product: ASUS Tinker Board (Power supply via GPIO, 5V4A) Armbian Image File: Armbian_20.05.2_Tinkerboard_buster_current_5.4.44_minimal.img.xz OS Info: root@tinkerboard:/boot# cat /etc/armbian-release # PLEASE DO NOT EDIT THIS FILE BOARD=tinkerboard BOARD_NAME="Tinkerboard" BOARDFAMILY=rockchip BUILD_REPOSITORY_URL=https://github.com/armbian/build BUILD_REPOSITORY_COMMIT=2efd215a DISTRIBUTION_CODENAME=buster DISTRIBUTION_STATUS=supported VERSION=20.05.2 LINUXFAMILY=rockchip BRANCH=current ARCH=arm IMAGE_TYPE=stable BOARD_TYPE=conf INITRD_ARCH=arm KERNEL_IMAGE_TYPE=Image root@tinkerboard:/boot# uname -a Linux tinkerboard 5.4.44-rockchip #20.05.2 SMP PREEMPT Wed Jun 3 10:43:15 CEST 2020 armv7l GNU/Linux 0 Quote Link to comment Share on other sites More sharing options...
Guest Posted August 13, 2020 Share Posted August 13, 2020 Unplugged the Tinker Board, took a break for several hours, established a serial port session to FTDI serial port from my laptop, then plug in TB again. And I can see the serial port output. Not sure what mattered. But now everything works. 0 Quote Link to comment Share on other sites More sharing options...
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