semaf/MFRC522_I2C_Library
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adding custum wire-object

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This commit is contained in:
kkloesener
2020-11-03 21:23:54 +01:00
parent 29253c0a09
commit a78cfa44da
2 changed files with 23 additions and 22 deletions
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43
MFRC522_I2C.cpp
View File

@ -19,7 +19,8 @@
* Prepares the output pins. * Prepares the output pins.
*/ */
MFRC522::MFRC522( byte chipAddress, MFRC522::MFRC522( byte chipAddress,
byte resetPowerDownPin ///< Arduino pin connected to MFRC522's reset and power down input (Pin 6, NRSTPD, active low) byte resetPowerDownPin, ///< Arduino pin connected to MFRC522's reset and power down input (Pin 6, NRSTPD, active low)
TwoWire myWire
) { ) {
_chipAddress = chipAddress; _chipAddress = chipAddress;
_resetPowerDownPin = resetPowerDownPin; _resetPowerDownPin = resetPowerDownPin;
@ -37,10 +38,10 @@ MFRC522::MFRC522( byte chipAddress,
void MFRC522::PCD_WriteRegister( byte reg, ///< The register to write to. One of the PCD_Register enums. void MFRC522::PCD_WriteRegister( byte reg, ///< The register to write to. One of the PCD_Register enums.
byte value ///< The value to write. byte value ///< The value to write.
) { ) {
Wire.beginTransmission(_chipAddress); myWire.beginTransmission(_chipAddress);
Wire.write(reg); myWire.write(reg);
Wire.write(value); myWire.write(value);
Wire.endTransmission(); myWire.endTransmission();
} // End PCD_WriteRegister() } // End PCD_WriteRegister()
/** /**
@ -51,12 +52,12 @@ void MFRC522::PCD_WriteRegister( byte reg, ///< The register to write to. One o
byte count, ///< The number of bytes to write to the register byte count, ///< The number of bytes to write to the register
byte *values ///< The values to write. Byte array. byte *values ///< The values to write. Byte array.
) { ) {
Wire.beginTransmission(_chipAddress); myWire.beginTransmission(_chipAddress);
Wire.write(reg); myWire.write(reg);
for (byte index = 0; index < count; index++) { for (byte index = 0; index < count; index++) {
Wire.write(values[index]); myWire.write(values[index]);
} }
Wire.endTransmission(); myWire.endTransmission();
} // End PCD_WriteRegister() } // End PCD_WriteRegister()
/** /**
@ -67,12 +68,12 @@ byte MFRC522::PCD_ReadRegister( byte reg ///< The register to read from. One of
) { ) {
byte value; byte value;
//digitalWrite(_chipSelectPin, LOW); // Select slave //digitalWrite(_chipSelectPin, LOW); // Select slave
Wire.beginTransmission(_chipAddress); myWire.beginTransmission(_chipAddress);
Wire.write(reg); myWire.write(reg);
Wire.endTransmission(); myWire.endTransmission();
Wire.requestFrom(_chipAddress, 1); myWire.requestFrom(_chipAddress, 1);
value = Wire.read(); value = myWire.read();
return value; return value;
} // End PCD_ReadRegister() } // End PCD_ReadRegister()
@ -90,11 +91,11 @@ void MFRC522::PCD_ReadRegister( byte reg, ///< The register to read from. One o
} }
byte address = reg; byte address = reg;
byte index = 0; // Index in values array. byte index = 0; // Index in values array.
Wire.beginTransmission(_chipAddress); myWire.beginTransmission(_chipAddress);
Wire.write(address); myWire.write(address);
Wire.endTransmission(); myWire.endTransmission();
Wire.requestFrom(_chipAddress, count); myWire.requestFrom(_chipAddress, count);
while (Wire.available()) { while (myWire.available()) {
if (index == 0 && rxAlign) { // Only update bit positions rxAlign..7 in values[0] if (index == 0 && rxAlign) { // Only update bit positions rxAlign..7 in values[0]
// Create bit mask for bit positions rxAlign..7 // Create bit mask for bit positions rxAlign..7
byte mask = 0; byte mask = 0;
@ -102,12 +103,12 @@ void MFRC522::PCD_ReadRegister( byte reg, ///< The register to read from. One o
mask |= (1 << i); mask |= (1 << i);
} }
// Read value and tell that we want to read the same address again. // Read value and tell that we want to read the same address again.
byte value = Wire.read(); byte value = myWire.read();
// Apply mask to both current value of values[0] and the new data in value. // Apply mask to both current value of values[0] and the new data in value.
values[0] = (values[index] & ~mask) | (value & mask); values[0] = (values[index] & ~mask) | (value & mask);
} }
else { // Normal case else { // Normal case
values[index] = Wire.read(); values[index] = myWire.read();
} }
index++; index++;
} }

2
MFRC522_I2C.h
View File

@ -321,7 +321,7 @@ public:
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Functions for setting up the Arduino // Functions for setting up the Arduino
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
MFRC522(byte chipAddress, byte resetPowerDownPin); MFRC522(byte chipAddress, byte resetPowerDownPin, TwoWire = Wire);
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Basic interface functions for communicating with the MFRC522 // Basic interface functions for communicating with the MFRC522