Ryo Iizuka / Mbed 2 deprecated PlatformSelectSample

This program can detect the type(mbed or LPCXpresso) of platform. The sample recognizes mbed or LPCXpresso.

Dependencies:   mbed

This program detects the LPCXpresso and mbed at run time.

There is a difference in the value of the CoreDebugRegister LPCXpresso and mbed.

The program check those bits and select platform type.

#include "mbed.h"
#include "PlatformInfo.h"
DigitalOut mbedled(LED1);
DigitalOut lpcxled(P0_22);
using namespace MiMic;
int main(){
    switch(PlatformInfo::getPlatformType()){
    case PlatformInfo::PF_MBED:
        while(1) {
            mbedled = 1;
            wait(0.2);
            mbedled = 0;
            wait(0.2);
        }
    case PlatformInfo::PF_LPCXPRESSO:
        while(1) {
            lpcxled = 1;
            wait(0.1);
            lpcxled = 0;
            wait(0.1);
        }
    }    
}

If program run on mbed, LED1(blue) will be blinking. If it run on LPCXpresso, LED2(red) will be blinking.

PlatformInfo.cpp

Committer:
nyatla
Date:
2013-05-05
Revision:
0:ef577a5fd78f

File content as of revision 0:ef577a5fd78f:

#include "PlatformInfo.h"
#define REG_HCSR 0xe000edf0
#define REG_DEMCR 0xE000EDFC

#include "mbed.h"
namespace MiMic
{
    int PlatformInfo::_pftype=PF_UNKNOWN;
    void PlatformInfo::check()
    {
    #if PlatformInfo_DETECTION_MODE==PlatformInfo_DETECTION_MODE_MBED
        _pftype=PF_MBED;
        return;
    #elif PlatformInfo_DETECTION_MODE==PlatformInfo_DETECTION_MODE_LPCXPRESSO
        _pftype=PF_LPCXPRESSO;
        return;
    #elif PlatformInfo_DETECTION_MODE==PlatformInfo_DETECTION_MODE_AUTO
        //LPCXpresso is return S_RESET_ST==1 when standalone.
        wait_ms(200);
        unsigned int v;
        v=*(unsigned int*)REG_HCSR;
        //check Debug Halting Control and Status::S_RESET_ST sticky bit
        if((v & 0x02000000)!=0){
            //may be LPC-Standalone
            _pftype=PF_LPCXPRESSO;        
            return;
        }
        v=(*(unsigned int*)REG_DEMCR);
        if((v & 0x01000000)==0x0){
            //may be mbed
            _pftype=PF_MBED;
            return;
        }
        _pftype=PF_LPCXPRESSO;
        return;
    #else
        #error "ERROR!"
    #endif
    }
    int PlatformInfo::getPlatformType()
    {
        if(_pftype==PF_UNKNOWN){
            check();
        }
        return _pftype;
    }
}