Embedded Linux S3C2440 Build and Boot an Image

Summary Tried to build and boot zImage on Embedded Linux S3C2440. Install Buildroot I tried to compile and install the latest Buildroot by downloading at https://buildroot.org/ , ‘buildroot-2018.02.9.tar.bz2’, the compiling and installation was successful, and change the /etc/profile to below, PATH=$PATH:/home/iot/buildroot-2018.02.9/output/host/usr/bin TARGET_DIR=/home/iot/buildroot-2018.02.9/output/target Note: you cannot use root to compile Buildroot. But the compiling for busybox […]

India Mumbai, Pune trip – 4 – Local Taxi travel

During my stay in India from 30th Nov. to 14th Dec.2018, I took Uber for local travel most of the times, as my Uber App payment linked to my credit card, the bill was paid in INR, and then pay back credit card by SGD in the credit card statement, although the exchange rate was […]

India Mumbai, Pune trip – 3 – Food

During India trip, I had to eat local food, the problem was that I cannot adapt to India local food. I got upset stomach in the first few days, not feeling like to eat at all. Things were improved a few days later, but normally I preferred to have soup, Tandoori Naan (India bread) and […]

India Mumbai, Pune trip – 2 – Hotel

Summary I was travelling in Pune and Mumbai India from 30th Nov. to 14th Dec, and stayed in three different hotels. Hotel Sagar Plaza at Pune. Club Emerald at Mumbai. Hotel Plaza at Mumbai. Hotel The Hotel Sagar Plaza at Pune was relatively good, it had swimming pool, but the weather was cool, nobody used […]

Oracle SHARED mode server confiuguration error ORA-12523

Summary Configure the Shared mode for Oracle connection, it failed and returned ORA-12523, found out it is mandatory to configure local listener. 本地监听的配置是必须的。 Configure Shared server mode ‘listener.ora’ was configured as below, LISTENER3 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ocp)(PORT = 1523)) ) LISTENER2 = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST […]

Running GUI application as another (non-root) user – Netmgr

Summary I can open the Netmgr in the Xshell through Xmanager without any issue. There was problem to do so using Oracle user under xWindows. Resolved it by setting “DISPLAY=:0.0”. Problem Need to use Netmgr GUI in xWindows. Error as below, [tom@ocp ~]$ netmgr ****DISPLAY environment variable not set! Oracle Net Manager is a GUI […]

India Mumbai, Pune trip – 1 – Air flight

I was on business trip to India Mumbai and Pune from 30th Nov. 2018 to 14th Dec. 2018, stayed 14 days in India. There is no direct flight from Singapore to Pune, I took Jet Aireways from Singapore to Delhi, then took domestic air flight transferred from Delhi to Pune. Singapore to Pune. FRI 30NOV […]

Oracle Start listener and Start OEM

Encountered SQL developer- the network adapter could not establish the connection, it is quite simple, the Oracle listener was not start up. Resolved by below command, after startup the listener, can connect through SQL developer with successful result. Error 1: Oracle SQL Developer error – IO Error: The Network Adapter could not establish the connection. […]

“ORA-01034: ORACLE not available” resolved

Summary Encountered problem cannot login Oracle by login name and password “system/oracle”, resolved this issue by changed the kernal parameter kernel.sem in sysctl.conf. Problem Encountered ORA-01034 and ORA-27101 as below, [tom@ocp ~]$ [tom@ocp ~]$ sqlplus /nolog SQL*Plus: Release 11.2.0.1.0 Production on 星期四 12月 20 20:42:24 2018 Copyright (c) 1982, 2009, Oracle. All rights reserved. SQL> […]

Keil copy out memory data when debugging

How to copy out the memory data from Keil when debugging, in command window, you can use Display command fetch the memory data, example: d 0x2000293C,0x20002984 0x2000293C C8 CC 9D 5F F2 EB FA D7 – AE 26 5F 5F BA 41 7D D3 …_…..&__.A}. 0x2000294C 4E 54 F3 F8 8C 62 E5 AD – […]