mbed API for Raspberry Pi boards.
mbedPi
This is an attempt to implement a limited number of mbed APIs for Raspberry Pi single-board computers. The project was inspired by and based on the arduPi library developed for the Arduino by Cooking Hacks .
Specifications
- Chip: Broadcom BCM2836 SoC
- Core architecture: Quad-core ARM Cortex-A7
- CPU frequency: 900 MHz
- GPU: Dual Core VideoCore IV® Multimedia Co-Processor
- Memory: 1GB LPDDR2
- Operating System: Boots from Micro SD card, running a version of the Linux operating system
- Power: Micro USB socket 5V, 2A
Connectors
- Ethernet: 10/100 BaseT Ethernet socket
- Video Output: HDMI (rev 1.3 & 1.4)
- Audio Output: 3.5mm jack, HDMI
- USB: 4 x USB 2.0 Connector
- GPIO Connector: 40-pin 2.54 mm (100 mil) expansion header: 2x20 strip providing 27 GPIO pins as well as +3.3 V, +5 V and GND supply lines
- Camera Connector: 15-pin MIPI Camera Serial Interface (CSI-2)
- JTAG: Not populated
- Display Connector: Display Serial Interface (DSI) 15 way flat flex cable connector with two data lanes and a clock lane
- Memory Card Slot: Micro SDIO
GPIO connector pinout
Information
Only the labels printed in blue/white or green/white (i.e. p3, gpio2 ...) must be used in your code. The other labels are given as information (alternate-functions, power pins, ...).
Building programs for the Raspberry Pi with mbedPi
I use Qt Creator for development, however you can use any other IDE available on the Raspberry Pi (e.g. Geany) if you like. For a quick try:
- Install Qt and the Qt Creator onto your Raspberry Pi. Then create a new "Blinky" Plain non-Qt C++ Project as follows:
- Change the main code as below:
main.cpp
#include "mbedPi.h" int main() { DigitalOut myled(p7); while(1) { myled = 1; // LED is ON wait(0.2); // 200 ms myled = 0; // LED is OFF wait(1.0); // 1 sec printf("Blink\r\n"); } }
- Copy the mbedPi.zip file into your project's folder and unzip.
- Add the mbedPi.h and mbedPi.cpp files to your project by right clicking on the "Blinky" project and then clicking on the "Add Existing Files..." option in the local menu:
- Double click on Blinky.pro to open it for editing and add new libraries by inserting a new line as follows:
- Compile the project.
- Connect an LED through a 1k resistor to pin 7 and the ground on the Raspberry Pi GPIO connector.
- Run the binary as sudo (sudo ./Blinky) and you should see the LED blinking.
- Press Ctrl+c to stop running the application.
rpi_wizard/qbs_rpi/RpiApplication.qbs
- Committer:
- hudakz
- Date:
- 21 months ago
- Revision:
- 1:1f2d9982fa8c
File content as of revision 1:1f2d9982fa8c:
import qbs import qbs.Process import qbs.File import qbs.FileInfo import qbs.TextFile import "/home/zoli/.config/QtProject/qtcreator/templates/wizards/qbs_rpi/js/helpers.js" as helpers CppApplication { type: "application" consoleApplication: true Depends { name: "cpp" } // cpp.cppFlags: "-std=c++11" // Depends { // name: "Qt"; // submodules: ["core", "gui", "widgets"] // } Group { fileTagsFilter: product.type qbs.install: true qbs.installDir: "bin" qbs.installPrefix: "/mnt/workbench" } property string sysPath: "/home/zoli/src/rpi/sys" property stringList sys: [ "drivers", ] property pathList sysPaths: { var l = [] for (var i = 0; i < sys.length; i++) { l = l.concat(helpers.dirs(sysPath+"/"+sys[i])) } return l } Group { name: "sys" condition: (sysPath != "") files: { var l = [] for (var i = 0; i < sys.length; i++) { // l = l.concat(sys[i]+"/**") l = l.concat(sys[i]+"/**/*.cpp") l = l.concat(sys[i]+"/**/*.c") l = l.concat(sys[i]+"/**/*.hpp") l = l.concat(sys[i]+"/**/*.h") l = l.concat(sys[i]+"/**/*.s") } return l } prefix: sysPath + "/" } property string libPath: "/home/zoli/src/rpi/lib" property stringList libs: [] property pathList libPaths: { var l = [] for (var i = 0; i < libs.length; i++) { l = l.concat(helpers.dirs(libPath+"/"+libs[i])) } return l } Group { name: "libs" condition: (libPath != "") files: { var l = [] for (var i = 0; i < libs.length; i++) { // l = l.concat(libs[i]+"/**") l = l.concat(libs[i]+"/**/*.cpp") l = l.concat(libs[i]+"/**/*.c") l = l.concat(libs[i]+"/**/*.hpp") l = l.concat(libs[i]+"/**/*.h") l = l.concat(libs[i]+"/**/*.s") } return l } prefix: libPath + "/" } property pathList includePaths: "" cpp.compilerIncludePaths: "/home/zoli/toolchain/rpi/arm-bcm2708/arm-bcm2708-linux-gnueabi/arm-bcm2708-linux-gnueabi/include/c++/4.7.1" cpp.compilerFrameworkPaths: "/home/zoli/toolchain/rpi/arm-bcm2708/arm-bcm2708-linux-gnueabi/bin/" cpp.compilerLibraryPaths: "/home/zoli/toolchain/rpi/arm-bcm2708/arm-bcm2708-linux-gnueabi/arm-bcm2708-linux-gnueabi/lib" cpp.includePaths: includePaths.concat("/.", sysPaths, libPath) //cpp.staticLibraries: ["mbed"] cpp.dynamicLibraries: ["rt", "pthread"] }