RTEMS GSOC 2017 Project: Beaglebone BSP Projects

My first part of GSOC project is finish the I2C driver left by GSOC 2016 student Punit Vara. I reference the U-Boot and FreeBSD i2c code for develop. 1. We need register the i2c bus: a) i2c_bus *i2c_bus_alloc_and_init(size_t size) this function is use for alloc and init a new i2c bus. i2c_bus *i2c_bus_alloc_and_init(size_t size) {   i2c_bus *bus = NULL;   if (size >= sizeof(*bus)) {     bus = calloc(1, size);     if (bus != NULL) {       int rv;       rv = i2c_bus_do_init(bus, i2c_bus_destroy_and_free);       if (rv != 0) {         return NULL;       }     }   }   return bus; } b) configure the I2C clock and pinimux there two pin we need to configure: static void am335x_i2c0_pinmux(bbb_i2c_bus *bus) {   REG(bus->regs + AM335X_CONF_I2C0_SDA) =   (BBB_RXACTIVE | BBB_SLEWCTRL | BBB_PU_EN); ...

We use the sdcard.sh shellScript to build a image file, which is contain in the RTEMS source code. The file is at   rtems-src/c/src/lib/libbsp/arm/beagle/simscripts sdcard.sh # we store all generated files here.    TMPDIR=tmp_sdcard_dir.$$      FATIMG=$TMPDIR/bbxm_boot_fat.img   SIZE=65536   OFFSET=2048   FATSIZE=`expr $SIZE - $OFFSET`   UENV=uEnv.txt      rm -rf $TMPDIR   mkdir -p $TMPDIR      if  [ $# -ne 2 ]   then    echo  "Usage: $0 <RTEMS prefix> <RTEMS executable>"        exit 1   fi      PREFIX=$1      if  [ ! -d  "$PREFIX"  ]   then  ...

1. Setting the PATH cd $HOME/development/rtems export PATH=$HOME/development/rtems/4.12/bin:$PATH the path is the RTEMS toolchain 2.Git RTEMS source code git clone git://git.rtems.org/rtems rtems-src 3.Configure the source code cd rtems-s ./bootstrap; ./bootstrap -prc 4.Compiling the code cd ..   mkdir build ;mkdir image;cd build ../rtems-src/configure --target=arm-rtems4.12 --enable-rtemsbsp=beagleboneblack  --prefix=........./image //the --prefix is use for store the compiled mirror elf file, we choose the image folder //then make make install then the Success tips are as follows： you can see the image folder contain these file as follow:

1.Make a new installation directory, such as $ HOME / development / rtems / mkdir -p development/rtems/sources cd development/rtems/sources Then in this directory using Git to get RSB source package git clone -b 4.11 https://github.com/rtems/rtems-source-builder.git 2. then carry out environmental testing, type the following command: ./rtems-source-builder/source-builder/sb-check  If the prompt indicates that an application is not installed, you can manually install the install apt-get for example:    sudo apt-get install makeinfo After check, you will get the follow hint: RTEMS Source Builder - Check, v0.3.0 Environment is ok 3.Start installing toolchain cd rtems-source-builder/rtems ../source-builder/sb-set-builder --log=beagle.txt --prefix=$HOME/development/rtems/4.11 4.11/rtems-arm.bset you may get some error: Reason is the following package needs to be installed: sudo apt-get build-dep binutil...

This summer, i will working for RTEMS. My project name is Beagleboard BSP projects: Improvement of I2C, USB and wireless BSP for Beaglebone Black. Project Abstract:   This project aims to improve the Beaglebone Black BSP support on RTEMS. Project intends to add the following supports to the Beaglebone Black BSP: I2C support, USB device support, Wireless network card support, USB dongle support. The wireless network support make the RTEMS can apply on many application scenarios such as the four rotor unmanned aerial vehicle. makes RTEMS more attractive for the user community. Project Description:   RTEMS is a open source embedded hard real-time operating system, It good at real-time, stability, development speed and multi-processor support. And compare with VxWorks, open source is the advantage of RTEMS. Now RTEMS is already working on Beaglebone Black, As so far, the ADC, PWM, GPIO is supported on BBB, But the BSP support is not enough, The users have limit...