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.
Diff: rpi_wizard/qbs_rpi/js/helpers.js
- Revision:
- 1:1f2d9982fa8c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rpi_wizard/qbs_rpi/js/helpers.js Tue Dec 20 12:08:07 2022 +0000 @@ -0,0 +1,65 @@ +var Process = require("qbs.Process"); +var File = require("qbs.File"); + +function findCommand(){ + // check if it's unix + if(File.exists("/usr/bin/find")){ + return "/usr/bin/find"; + } + + // else msys2, search unix find command + var where = new Process(); + where.exec("where.exe", ['find'], true); + if(where.exitCode()!==0){ + throw("error: There is a problem to detect the 'find' command."+where.exitCode()); + } + + while(true){ + var line = where.readLine(); + if(line!=="" && line!==undefined){ + var findPos = line.indexOf("bin\\find.exe"); + if (findPos > -1){ + return line; + } + }else{ + break; + } + } + where.close() + return "find"; +} + +function dirs(dir){ + var ret = [] + if(!File.exists(dir)){ + return ret; + } + var find = new Process(); + var params = [dir,'-type','d']; + find.exec(findCommand(), params) + if(find.exitCode()!==0){ + var error = find.readStdErr(); + throw("error: " + error) + } + var line = find.readLine(); + while(line.trim()!==""){ + ret = ret.concat([line.trim()]); + line = find.readLine(); + } + find.close(); + return(ret) +} + +function getTimes() { + var d = new Date() + var current = d.getTime()/1000 // To seconds + var timezone = d.getTimezoneOffset()*60 // To seconds + var daylight = 0 + + return {"utc":current.toFixed(), + "local":(current+timezone+daylight).toFixed(), + "zone":timezone.toFixed(), + "dst":daylight.toFixed()} +} + +