ShiftRegGPIOXpander.h

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#ifndef _ShiftRegGPIOXpander_ESP32_H_
#define _ShiftRegGPIOXpander_ESP32_H_
 
#include <Arduino.h>
#include <stdint.h>
 
class ShiftRegGPIOXpander{
private:
   uint8_t _ds{};
   uint8_t _sh_cp{};
   uint8_t _st_cp{};
   uint8_t _srQty{};
 
   uint8_t* _srArryBuffPtr{};
   uint8_t* _auxArryBuffPtr{nullptr};
   uint8_t _maxSrPin{0};
 
   bool _sendSnglSRCntnt(uint8_t data); // Sends the content of a single byte to a Shift Register filling it's internal buffer, but it does not latch it (it does not set the output pins of the shfit register to the buffered value). The latching must be done by the calling party.
public:
   ShiftRegGPIOXpander();
   ShiftRegGPIOXpander(uint8_t ds, uint8_t sh_cp, uint8_t st_cp, uint8_t srQty = 1, uint8_t* initCntnt = nullptr);
   ~ShiftRegGPIOXpander();
   bool copyMainToAux(bool overWriteIfExists = true);
   void discardAux();
   uint8_t digitalReadSr(const uint8_t &srPin);
   void digitalWriteSr(const uint8_t srPin, const uint8_t value);
   void digitalWriteSrAllReset();
   void digitalWriteSrAllSet();
   void digitalWriteSrMaskReset(uint8_t* newResetMask);
  void digitalWriteSrMaskSet(uint8_t* newSetMask);
   void digitalWriteSrToAux(const uint8_t srPin, const uint8_t value);
   uint8_t* getMainBuffPtr();
   uint8_t getMaxPin();
   uint8_t getSrQty();
  bool moveAuxToMain(bool flushASAP = true);
  bool stampOverMain(uint8_t* newCntntPtr);
   bool sendAllSRCntnt();
};
 
#endif //ShiftRegGPIOXpander_ESP32_H_