library to modify and read program variable in runtime from a serial console. You can reset as well the mbed from the console without pushing buttons. Handy for debugging from the online compiler as you can change the behavior of the program without need to recompile each time.
VarStore.cpp
- Committer:
- julmbed
- Date:
- 2014-08-26
- Revision:
- 17:8c20a558d34f
- Parent:
- 13:e1ba5bf9e51f
File content as of revision 17:8c20a558d34f:
#include <string.h> #include <stdio.h> #include "mbed.h" #include "rtos.h" extern "C" void mbed_reset(); #include "VarStore.h" #define CI_SZ 100 /* Constructor */ VarStore::VarStore( RawSerial *ser, int sz) { VarCounter=0; this->pc=ser; this->sz=sz; //Store=(VarItem *) malloc( sizeof(VarItem)*sz); doesn't work Store=new VarItem[sz]; } /* destructor */ VarStore::~VarStore() { //dtor } /* destructor */ char *VarStore::Set(char *Input) { VarItem *V; char *Name; // beaware of puts pc->printf("VarStore Set %s\n",Input); if(Input [0] == 's') { strtok(Input,":"); Name=strtok(NULL,":"); if((V=GetVar(Name)) != NULL) return V->SetVal(strtok(NULL,":"))!= ERR ? Input : NULL; } return NULL; } /* ************************ */ int VarStore::Load(char *Name, void *VarPtr,VarTypes VarType ) { return Load(Name, VarPtr,VarType,0 ); } /* ************************ */ int VarStore::Load(char *Name, void *VarPtr,VarTypes VarType, int Size ) { if(GetVar(Name) ==NULL) { if(VarCounter < sz) { Store[VarCounter].SetVar(VarType,VarPtr); Store[VarCounter].SetVarName(Name); Store[VarCounter].SetVarArraySize(Size); VarCounter++; return NULL; } } return ERR; } /* ************************ */ VarItem *VarStore::GetVar(char *Name) { for (int i=0; i<sz; i++) if((strcmp(Name,Store[i].GetVarName()))==0) return &Store[i]; return NULL; } /* ************************ */ char* VarStore::Get(char *Name) { VarItem *V; V=GetVar(Name); if(V!=NULL) return V->Dump(); else return NULL; } /* ************************ */ void VarStore::Worker2() { static char c, *ret=STR_OK;// not NULL to start in no error state static int ci_counter=0; static char Cs[CI_SZ]; if(VarStore::MyThis->pc->readable()) { c=VarStore::MyThis->pc->getc(); if(ci_counter >= CI_SZ-1) { // RESET too much input ci_counter=0; Cs[0]='\0'; } else { if(c=='\r') { // got a command lets see whan can be done Cs[ci_counter]='\0'; ret=VarStore::MyThis->Do(Cs); ci_counter=0; Cs[0]='\0'; } else { // no command yet, let's keep recording. Cs[ci_counter]=c; ci_counter++; } } } if(ret==NULL) { // ups..... VarStore::MyThis->pc->puts(" error setting/getting var \n"); ret=STR_OK; } } /* ** nuisances for mixing threads/static members etc */ VarStore *VarStore::MyThis=NULL; // used by the worker reading the terminal. Need to be initilized this way to avoid // compiling errors /* ************************ */ void VarStore::Worker(void const *args) { VarStore::MyThis=(VarStore *)args; VarStore::MyThis->pc->attach(&VarStore::Worker2); while(1) { Thread::wait(1000); // nothing to do here besides firing worker2 when input ready } } /* ************************ */ char *VarStore::Do(char *str) { char *ret; if(str != NULL) { switch(*str) { case 's': /// command s s:varname:value or s:arrayname:value1,value2,value3 assign values at runtime return VarStore::MyThis->Set(str); case 'd': /// command d d:variablename dumps content of variable to screen/console. VarStore::MyThis->pc->puts(str); VarStore::MyThis->pc->putc('\n'); ret=strtok(str,":"); ret=strtok(NULL,":"); ret=VarStore::MyThis->Get(ret); if(ret!=NULL) { VarStore::MyThis->pc->puts(ret); VarStore::MyThis->pc->putc('\n'); return ret; } else return NULL; case 'r': /// command r resets the mbed. If you previously downloaded a new version fo code, it will run. mbed_reset(); return NULL; case 'w': /// command w waits a number of miliseconds releasing the input console to be used for other stuff temporarily strtok(str,":"); Thread::wait(atoi(strtok(NULL,":"))); return STR_OK; }; } return NULL; }