Ryo Iizuka
This program can detect the type(mbed or LPCXpresso) of platform. The sample recognizes mbed or LPCXpresso.
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.
Diff: PlatformInfo.cpp
- Revision:
- 0:ef577a5fd78f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PlatformInfo.cpp Sun May 05 11:29:12 2013 +0000
@@ -0,0 +1,47 @@
+#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;
+ }
+}
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