Zoltan Hudak / mbedPi

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

Zoom in

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:

#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.

--- a/rpi_wizard/qbs_rpi/js/helpers.js	Tue Dec 20 12:08:07 2022 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,65 +0,0 @@
-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()}
-}
-
-