libs/RFID.MFRC522
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Some fixes for STM32F1 platform

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* replace char with int8_t because char does not seem to be signed on STM32 and leads to infinite loops.
* move the pin handling out of constructor and into PCD_Init() function to avoid problems with digitalWrite() crashing due to unpredictable global variable initialisation order on STM32 (pin map arrays are not always setup before user's global objects are constructed).
This commit is contained in:
Adrian Nistor
2015-06-13 19:59:04 +03:00
parent 9a27fd7571
commit 68f0b68a5a
1 changed files with 13 additions and 13 deletions
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26
MFRC522.cpp
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@@ -18,18 +18,8 @@
MFRC522::MFRC522( byte chipSelectPin, ///< Arduino pin connected to MFRC522's SPI slave select input (Pin 24, NSS, active low)
byte resetPowerDownPin ///< Arduino pin connected to MFRC522's reset and power down input (Pin 6, NRSTPD, active low)
) {
// Set the chipSelectPin as digital output, do not select the slave yet
_chipSelectPin = chipSelectPin;
pinMode(_chipSelectPin, OUTPUT);
digitalWrite(_chipSelectPin, HIGH);
// Set the resetPowerDownPin as digital output, do not reset or power down.
_resetPowerDownPin = resetPowerDownPin;
pinMode(_resetPowerDownPin, OUTPUT);
digitalWrite(_resetPowerDownPin, LOW);
// Set SPI bus to work with MFRC522 chip.
setSPIConfig();
} // End constructor
/**
@@ -194,6 +184,16 @@ byte MFRC522::PCD_CalculateCRC( byte *data, ///< In: Pointer to the data to tra
* Initializes the MFRC522 chip.
*/
void MFRC522::PCD_Init() {
// Set the chipSelectPin as digital output, do not select the slave yet
pinMode(_chipSelectPin, OUTPUT);
digitalWrite(_chipSelectPin, HIGH);
// Set the resetPowerDownPin as digital output, do not reset or power down.
pinMode(_resetPowerDownPin, OUTPUT);
// Set SPI bus to work with MFRC522 chip.
setSPIConfig();
if (digitalRead(_resetPowerDownPin) == LOW) { //The MFRC522 chip is in power down mode.
digitalWrite(_resetPowerDownPin, HIGH); // Exit power down mode. This triggers a hard reset.
// Section 8.8.2 in the datasheet says the oscillator start-up time is the start up time of the crystal + 37,74<37>s. Let us be generous: 50ms.
@@ -545,7 +545,7 @@ byte MFRC522::PICC_Select( Uid *uid, ///< Pointer to Uid struct. Normally outp
byte count;
byte index;
byte uidIndex; // The first index in uid->uidByte[] that is used in the current Cascade Level.
char currentLevelKnownBits; // The number of known UID bits in the current Cascade Level.
int8_t currentLevelKnownBits; // The number of known UID bits in the current Cascade Level.
byte buffer[9]; // The SELECT/ANTICOLLISION commands uses a 7 byte standard frame + 2 bytes CRC_A
byte bufferUsed; // The number of bytes used in the buffer, ie the number of bytes to transfer to the FIFO.
byte rxAlign; // Used in BitFramingReg. Defines the bit position for the first bit received.
@@ -1304,7 +1304,7 @@ void MFRC522::PICC_DumpMifareClassicToSerial( Uid *uid, ///< Pointer to Uid str
// Dump sectors, highest address first.
if (no_of_sectors) {
Serial.println(F("Sector Block 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 AccessBits"));
for (char i = no_of_sectors - 1; i >= 0; i--) {
for (int8_t i = no_of_sectors - 1; i >= 0; i--) {
PICC_DumpMifareClassicSectorToSerial(uid, key, i);
}
}
@@ -1359,7 +1359,7 @@ void MFRC522::PICC_DumpMifareClassicSectorToSerial(Uid *uid, ///< Pointer to U
byte buffer[18];
byte blockAddr;
isSectorTrailer = true;
for (char blockOffset = no_of_blocks - 1; blockOffset >= 0; blockOffset--) {
for (int8_t blockOffset = no_of_blocks - 1; blockOffset >= 0; blockOffset--) {
blockAddr = firstBlock + blockOffset;
// Sector number - only on first line
if (isSectorTrailer) {