I have done software debounce logic with 2/3 voter logic and kindly verify the coding i don't no whether it is correct or not. Please help me
Coding:
void inputRoutine() { uint16_t temp; InputP1_Temp=P1&0x00; for(Index1=0;Index1<MAXINPUTS;Index1++) { temp=debounce(Index1); if(temp==1) { Input_TableP1[Index1]=1; } else if(temp==0) { Input_TableP1[Index1]=0; } } } /***************** -- Debounce Port P1 -- *****************/ bit debounce(uint16_t IN_INDEX) { uint16_t INDEX2,ONE=0,ZERO=0; char TEMP,SHIFT_RESULT[3]=0x00; for(INDEX2=0;INDEX2<3;INDEX2++) { TEMP= P1; SHIFT_RESULT[INDEX2]=(TEMP>>IN_INDEX)& 0x01; delay_10micro_sec(); } /* Comparision of 3 values retreived from same pin*/ for(INDEX2=0;INDEX2<3;INDEX2++) { if(SHIFT_RESULT[INDEX2]==1) ONE++; else if(SHIFT_RESULT[INDEX2]==0) ZERO++; } return (ONE>ZERO); }
With Thanks, G.Karthik Ragunath
Debounce? I see no such thing (unless the switch has a bounce time in nano or microseconds.
the surefire way to debounce is
timer reloading at bounce time set flag47
in the main
if flag47 read the switches to newswitches
compare newswitches to oldswitches if identical --compare oldswitch to sentswitch --if different ----set newswitch flag (to be reset in switch processor) -------- switch processor reads sentswitch ----set sentswitch to oldswitch if different set oldswitch to newswitch
Erik