Category: Programming

Posted on by Jean-Luc Aufranc (CNXSoft) - 31 Comments on Rockchip RK3066/RK30xx Processors Documentation, Source Code and Tools

Rockchip RK3066/RK30xx Processors Documentation, Source Code and Tools

Rockchip RK3066 (part of RK30xx family) is a Chinese dual ARM Cortex A9 SoC targeting multimedia products such as tablets (e.g. Cube U30GT), mini PC (e.g UG802, MK808) and in theory set-top boxes, but I can’t find any products based on this Rockchip processor. It seems mini PCs/ HDMI TV sticks have taken over this market. RK3066 Processor The processor features two ARM Cortex A9 clocked at up to 1.6 Ghz with a quad core Mali-400MP GPU. It can support 1080p (3D) encoding/decoding, provides HDMI 1.4a, VGA, composite, component and LVDS video outputs (Dual display support),  USB 2.0 Host and OTG ports, a MAC interface (Ethernet), and much more… Here are the key features of Rockchip RK3066 processor: Dual Core A9 + Quad Core Mali-400MP GPU 2 banks, 8/16 bit Nor flash / SRAM interface 8 banks, 8/16 bit async NAND flash, LBA NAND flash and 8-bit sync ONFI NAND […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 38 Comments on AMLogic Releases AML8726-MX Linux 3.0.8 Source Code

AMLogic Releases AML8726-MX Linux 3.0.8 Source Code

While doing a Google search to locate the open Linux page of AMLogic, I noticed another link reading “Amlogic AML8726-MX Linux kernel code released“. Interesting. So AMLogic appears to have released the kernel source code for their latest dual core Cortex A9 processor at the beginning of August and the tarball is available from their open source site:  kernel-common-2012-08-03-git-a63244fb9c.tar.gz. A github user (fards) also imported the code to github, but he’s not affiliated with AMLogic, so don’t expect commits from AMLogic there. Let’s retrieve it:

AML8726-MX is codenamed MESON6 in the source code, and the code is in arch/arm/mach-meson6/, but let’s see if we can find a config file in arch/arm/configs. Yes! There are 4: meson6_android_defconfig – Android config file (Single core) meson6_defconfig – Linux config file (Single core) all Android config disabled. meson6smp_android_defconfig – Android config file with smp (symmetric multiprocessing) support meson6smp_defconfig – Config file with smp […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 2 Comments on 15 Linaro OnAir Sessions about Android, Linux, Debugging and Software QA

15 Linaro OnAir Sessions about Android, Linux, Debugging and Software QA

Linaro has planned 15 virtual conferences between Monday, August 13 and Saturday, August 18, 2012. Those online events will deal with the work done at Linaro, including software optimization, software QA, Android and Linux kernel development, Open Embedded on ARMv8 and more. Those conferences are public and anybody can join. All times indicated below are GMT+07:00 (Bangkok), so you can either mentally convert the time (recommended), or click on the links below to get the date and time in your timezone. Exploring The Performance Impact of PGO and LTO on ARM– Mon, August 13, 5:00 PM Abstract: Profile guided and linked time optimisation (PGO and LTO) are two of GCC’s cross program optimisations that should improve both the startup and runtime of typical programs.  We know that they basically work on ARM but don’t know the potential speed up or the work involved in proper support. This session will cover […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 3 Comments on Qualcomm Snapdragon S4 Pro Mobile Development Platform Is Now Available for $1299

Qualcomm Snapdragon S4 Pro Mobile Development Platform Is Now Available for $1299

A few weeks ago, Qualcomm showcased their new Snapdragon S4 APQ8064 processor with their tablet reference design at Uplink 2012. The platform (Snapdragon S4 Pro Mobile Development Platform for tablets (MDP/T)) is now available to developers for 1299 USD. This development tablet based on APQ8064 processor with Adreno 320 GPU comes with 2GB LPDDR2 RAM and 32 GB flash, features a 10.1” WXGA Multi-touch display, and runs Android 4.0. It will allows developers and manufacturer to develop, test, optimize and showcase applications and games for a wide range of pre-commercial Android devices. Here are the technical specifications of the Snapdragon S4 Pro APQ8064 MDP/T: Processor APQ8064 @ 1.5 Ghz (Quad core) PM8921+ PM8821 (PMIC) WCN3360 (WLAN/BT/FM) WCD9310 (Audio) WGR7640 (GPS) Graphics Adreno 320 graphics processing unit (GPU) Display 10.1” 1366×768 display True multi-touch capacitive touch screen Video 1080 High-definition video recording and playback up to 30 frames per second Stereoscopic […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on AnDevCon IV Classes and Workshops Schedule

AnDevCon IV Classes and Workshops Schedule

AnDevCon is a technical conference for software developers building Android apps, and the fourth Android developer conference will take place in San Francisco on December 4-7, 2012. The organizers have already listed the schedule, including details about the workshops and classes which will take place at the conference. The 4th of December is reserved for workshops, and the other 3 days can be spent on shorter classes. All workshops will provide sample code, as well as most classes, excluding the overview session and business related sessions. There will be three full day Android workshops: Android Development Boot Camp – Hands-on introduction to Android application development and the tools essential to the process. Beyond an introduction to the basics, this workshop also covers some of the common hurdles met with development, and how to overcome them. You will also have the opportunity to build an Android app of your own where […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 24 Comments on Building the Linux Kernel 3.0.8 For Telechips TCC8925 mini PCs (CX-01, Z900, TizzBird N1…)

Building the Linux Kernel 3.0.8 For Telechips TCC8925 mini PCs (CX-01, Z900, TizzBird N1…)

Yesterday, we got Linux kernel 3.0.8 source code from Telechips, as well as some files related to Android 4.0 (Webkit + OMX). Today, I’ve had a look at the kernel source code and found a few very interesting things. First let’s get the code from github:

Good news! The code for the latest Telechips TCC892X is present in arch/arm/mach-tcc892x, and there is support for 3 types of boards: board-m805_892x – TCC8923 M805 board board-tcc8920 – TCC8920 evaluation board board-tcc8920st – TCC8920 STB evaluation board TCC8920 STB evaluation board appears to be relevant to products such as Diyomate A6, but if it’s also used for TCC8925 HDMI Dongle such as CX-01 mini PC, Zero Devices Z900 or ValuePlus TizzBird N1. Now let’s have a look at the default config directory for arm (arch/arm/configs):

Nice! tcc8925st_dongle_defconfig and tcc8925st_donglehs_defconfig look particularly interesting! A quick comparison shows that the only difference is […]

Posted on by Jean-Luc Aufranc (CNXSoft) - No Comments on ELLCC Multi-Target Cross Compiler Based on Clang and LLVM Compiler Infrastructure

ELLCC Multi-Target Cross Compiler Based on Clang and LLVM Compiler Infrastructure

ELLCC is a project aiming at creating a multi-target cross compilation environment for embedded systems. which makes use of Clang and the LLVM compiler infrastructure. QEMU is used for cross-platform testing. The project goals are to implement the following key features: A functional C/C++ compiler based on Clang (ecc) Multi-target support: ARM, i386, Microblaze, Mips, Nios2, PowerPC, PowerPC64, Sparc and X86_64 Multi-OS support: Linux, Standalone, … A complete test environment that allows automatic unit and integration testing of the run-time environment and complete executables. Support of a wide variety of target processors from armv4 to armv7, several mips cores, i386, and more. The project is still being developed, and ELLCC is in a pre-release state. ELLCC is composed of the following components: ecc – The ELLCC C/C++ compiler,  a single executable with gcc compatible options. binutils – The GNU binutils package. libecc – The C standard library based on the musl standard […]

Posted on by Jean-Luc Aufranc (CNXSoft) - 6 Comments on Installing Android SDK on Ubuntu 12.04

Installing Android SDK on Ubuntu 12.04

The official instructions to install Android SDK do not appear to be really up-to-date for Ubuntu 12.04, so I’ll post how I’ve installed the Android SDK and Eclipse on Ubuntu 12.04. First download and decompress Android SDK for Linux:

on 64-bit Ubuntu:

Sun Java is not part of Ubuntu packages anymore, so you’ll need to use openjdk instead

Now install the SDK

Android SDK Manager should show up. Use the default recommended packages and platforms, as well as any extra packages you may need, and click on Install x packages, accept all licenses and after installation is complete, the Android SDK is installed. Eclipse IDE is optional, but it’s the most widely used IDE to develop Android apps. You can install Eclipse as follows:

Once both Android packages and platforms, and eclipse are installed, start eclipse:

Then in the top menu, click on Help->Install […]

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