Method writeLong

src/SPIFram.cpp:760–804

Writes a signed long as four bytes starting from a specific location in a page Takes three arguments - 1. _addr --> Any address - from 0 to capacity 2. data --> One signed long to be written to a particular location on a page 3. errorCheck --> Turned on by default. Checks for writing errors WARNING: You can only write to previously erased memory locations (see datasheet). Use the eraseSector()/era

// WARNING: You can only write to previously erased memory locations (see datasheet).
// Use the eraseSector()/eraseBlock32K/eraseBlock64K commands to first clear memory (write 0xFFs)
bool SPIFram::writeLong(uint32_t _addr, int32_t data, bool errorCheck) {
  //return _write(_addr, data, sizeof(data), errorCheck, _LONG_);
  #ifdef RUNDIAGNOSTIC
    _spifuncruntime = micros();
  #endif
  if(_isChipPoweredDown() || !_addressCheck(_addr, sizeof(data)) || !_notPrevWritten(_addr, sizeof(data)) || !_writeEnable()) {
    return false;
  }

  _beginSPI(PAGEPROG);
  for (uint8_t i = 0; i < sizeof(data); i++) {
    _nextByte(WRITE, data >> (8*i));
  }
  CHIP_DESELECT

  if (!errorCheck) {
    _endSPI();
    #ifdef RUNDIAGNOSTIC
      _spifuncruntime = micros() - _spifuncruntime;
    #endif
    return true;
  }
  else {
    union {
      uint8_t byte[4];
      int32_t Long;
    } dataIn;
    _currentAddress = _addr;
    CHIP_SELECT
    _nextByte(WRITE, READDATA);
    _transferAddress();
    for (uint8_t i = 0; i < sizeof(data); i++) {
      dataIn.byte[i] = _nextByte(READ);
    }
    _endSPI();
    if (dataIn.Long != data) {
      #ifdef RUNDIAGNOSTIC
        _spifuncruntime = micros() - _spifuncruntime;
      #endif
      return false;
    }
    #ifdef RUNDIAGNOSTIC
      _spifuncruntime = micros() - _spifuncruntime;
    #endif
  }
  return true;
}