CommandStation-EX/CamParser.cpp

//sensorCAM parser.cpp version 3.01  Aug 2024
#include "CamParser.h"
#include "FSH.h"
#include "IO_EXSensorCAM.h"

#ifndef SENSORCAM_VPIN       //define CAM vpin (700?) in config.h
#define SENSORCAM_VPIN 0     
#endif
#define CAM_VPIN SENSORCAM_VPIN
#ifndef SENSORCAM2_VPIN 
#define SENSORCAM2_VPIN CAM_VPIN
#endif
#ifndef SENSORCAM3_VPIN 
#define SENSORCAM3_VPIN 0
#endif
const int CAMVPINS[] = {CAM_VPIN,SENSORCAM_VPIN,SENSORCAM2_VPIN,SENSORCAM3_VPIN};
const int16_t version=9914;
const int16_t ver=30177;
const int16_t ve =2899;

VPIN EXSensorCAM::CAMBaseVpin = CAM_VPIN;

bool CamParser::parseN(Print * stream, byte paramCount, int16_t p[]) {
  (void)stream;  // probably unused parameter 
  VPIN vpin=EXSensorCAM::CAMBaseVpin;   //use current CAM selection

  if (paramCount==0) { 
    DIAG(F("vpin:%d EXSensorCAMs defined at Vpins #1@ %d #2@ %d #3@ %d"),vpin,CAMVPINS[1],CAMVPINS[2],CAMVPINS[3]);
    return true; 
  }
  uint8_t camop=p[0]; // cam oprerator 
  int16_t param1=0;
  int16_t param3=9999;   // =0 could invoke parameter changes. & -1 gives later errors

  if(camop=='C'){ 
    if(p[1]>=100) EXSensorCAM::CAMBaseVpin=p[1];
    if(p[1]<4) EXSensorCAM::CAMBaseVpin=CAMVPINS[p[1]];
    DIAG(F("CAM base Vpin: %c %d "),p[0],EXSensorCAM::CAMBaseVpin);
    return true;
  }
  if (camop<100) {               //switch CAM# if p[1] dictates
    if(p[1]>=100 && p[1]<400) {  //limits to CAM# 1 to 3 for now
      vpin=CAMVPINS[p[1]/100];
      EXSensorCAM::CAMBaseVpin=vpin;     
      DIAG(F("switching to CAM %d baseVpin:%d"),p[1]/100,vpin); 
      p[1]=p[1]%100;             //strip off CAM #
    } 
  }
  if (EXSensorCAM::CAMBaseVpin==0) return false; // no cam defined 

  if((p[0] == ve) || (p[0] == ver) || (p[0] == version)) camop='^';
      // send UPPER case to sensorCAM to flag binary data from a DCCEX-CS parser  
  switch(paramCount) {    
    case 1:                          //<N ver> produces '^' 
      if (strchr_P((const char *)F("EFGMRVW^"),camop) == nullptr) return false;
      if (camop=='F') camop=']';     //<NF> for Reset/Finish webCAM.
      break;    // Coded as ']' else conflicts with <Nf %%>
    
    case 2:                          //<N camop p1>  
      if (strchr_P((const char *)F("ABFILMNOPRSTUV^"),camop)==nullptr) return false;
      param1=p[1];
      break;
    
    case 3:              //<N vpin rowY colx > or <N cmd p1 p2>
      camop=p[0];
      if (p[0]>=100) {   //vpin - i.e. NOT 'A' through 'Z'
        if (p[1]>236 || p[1]<0) return false;     //row
        if (p[2]>316 || p[2]<0) return false;     //column
        camop=0x80;      // special 'a' case for IO_SensorCAM
        vpin = p[0];
      }else if (strchr_P((const char *)F("IJMNT"),camop) == nullptr) return false; 
      param1 = p[1];  
      param3 = p[2];
      break;
    
    case 4:         //<N a id row col> 
      if (camop!='A') return false;          //must start with 'a' 
      if (p[3]>316 || p[3]<0) return false;
      if (p[2]>236 || p[2]<0) return false;
      if (p[1]>97 || p[1]<0) return false;   //treat as bsNo.
      vpin = vpin + (p[1]/10)*8 + p[1]%10;   //translate p[1]
      camop=0x80;    // special 'a' case for IO_SensorCAM
      param1=p[2];   // row
      param3=p[3];   // col
      break;

    default:
      return false;
  }
  DIAG(F("CamParser: %d %c %d %d"),vpin,camop,param1,param3);
  IODevice::writeAnalogue(vpin,param1,camop,param3);
  return true;
}