Four-wire resistive touch screen sampling filtering algorithm C language code

Four-wire resistive touch screen sampling filter algorithm, practice proved very useful!

void Tsadcstart (void)//own implementation {}bool istsadcover (void)//own implementation {BOOL iRes; return iRes;}    U16 Tsadcgetx (void)//implementation {u16 ixphy = 0; return ixphy;}    U16 tsadcgety (void)//implementation {u16 iyphy = 0; return iyphy;}    void delayms (U32 t)//own implementation {}U32 Tsgetphycoord (void) {U8 i = 0;    U8 j = 0;    U16 Arrxphy[3] = {0};    U16 Arryphy[3] = {0};    U16 Arrmidxphy[2] = {0};    U16 Arrmidyphy[2] = {0};    U16 deltax = 0;     U16 DeltaY = 0; U32 ixyphy = 0;for (i=0; i<6; i++) {if (i = = 0) {delayms (5);//////////X, Y, 3 physical values as a set for (j=0; j<3; j + +) for first sampling             Tsadcstart (); Implement while (!   Istsadcover ()); own implementation Arrxphy[j] = Tsadcgetx (); own implementation Arryphy[j] = Tsadcgety ();    Implement it yourself if (j! = 2) {delayms (1);}} Remove the intermediate size values of a set of physical values arrxphy[1] = middle (arrxphy[0], arrxphy[1], arrxphy[2]); arryphy[1] = Middle (arryphy[0], arryphy[1], ARRYPHY[2]); if (I < 2)//record the first two groups get the median value {arrmidxphy[i] = arrxphy[1];arrmidyphy[i] = arryphy[1];} else//Record the median value (if necessary) after the first two groups {//move the 1th value of the array to the NO. 0 value so that the 1thValues can be stored in the new value arrmidxphy[0] = arrmidxphy[1];arrmidyphy[0] = arrmidyphy[1];           Deposit the new value at the 1th value of the array arrmidxphy[1] = arrxphy[1];arrmidyphy[1] = arryphy[1]; This code moves the value [1] to [0] each time, and then places the new value at [1]} if (i > 0) {deltax = arrmidxphy[0]-arrmidxphy[1];d Eltay = arrmidyphy[0]-Arrmid        YPHY[1]; if (ABS (deltax) >2 | | ABS (DeltaY) >2) {//If the initial two sets of sampled data are not required, continue sampling,//until the sampling meets the requirements or the maximum number of samples allowed to end sampling delayms (2); continue;} else{//sample results meet requirements, end this touch sampling break;}}        else{//after the first outer loop, the next cycle delayms (5) is to be carried out at intervals. }//for X, y two sets of physical intermediate values arrmidxphy[0] = (Arrmidxphy[0] + arrmidxphy[1]) >> 1;arrmidyphy[0] = (Arrmidyphy[0] + arrmidyphy [1]) >> 1;ixyphy = arrmidxphy[0];ixyphy <<= 16;ixyphy |= arrmidyphy[0];return ixyphy;}

Four-wire resistive touch screen sampling filtering algorithm C language code