trotFunky/Projet_Barbapapa_Firmware
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RFID: Clean up and generalize

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Add a constant for the ID block used and replace it.

Clean up some comments and clarify expectations.

readBlock() did not properly halt tags after errors and the else
clause was superfluous. Properly handle error status.

Move currentActiveTags to be static and initialize it.
This allows for keeping track of max/current tags accross multiple instances.
This commit is contained in:
Teo-CD 2024-01-06 00:15:45 +00:00
parent a438cb13d4
commit 73ceeb493c
2 changed files with 15 additions and 10 deletions
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18
src/RFID.cpp
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@ -5,6 +5,7 @@
#include "RFID.h"
MFRC522Constants::MIFARE_Key RFID::defaultKey = {0xFF,0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
int RFID::currentActiveTags = 0;
void RFID::init() {
// Create and set up a static linked list to manage active tags.
@ -58,11 +59,11 @@ int8_t RFID::checkTags() {
return 0;
}
// If the read fails, we cannot use this tag anyway so remove it from the list.
if (!readBlock(newTag->uid, 0x11) ) {
if (!readBlock(newTag->uid, tagIdBlock) ) {
removeActiveTag(newTag, nullptr);
return 0;
}
// TODO: ID check ?
// Don' t check the ID, otherwise we cannot program the tag.
newTag->tag_ID = comData[0];
return newTag->tag_ID;
}
@ -101,16 +102,17 @@ bool RFID::readBlock(MFRC522Constants::Uid &uidToRead, byte blockAddr) {
if (mfrc.PCD_Authenticate(
MFRC522Constants::PICC_Command::PICC_CMD_MF_AUTH_KEY_A,
blockAddr, (&defaultKey),&uidToRead)!= MFRC522Constants::STATUS_OK) {
Serial.println("Failed to authenticate");
Serial.println("readBlock: Failed to authenticate");
mfrc.PICC_HaltA();
return false;
} else {
byte size = sizeof(comData);
mfrc.MIFARE_Read(blockAddr, comData, &size);
// Serial.printf("Read block : 0x%lX\n", *(uint32_t *)comData);
}
byte size = sizeof(comData);
MFRC522::StatusCode status = mfrc.MIFARE_Read(blockAddr, comData, &size);
// Serial.printf("Read block : 0x%lX\n", *(uint32_t *)comData);
// Needed otherwise no new communications can happen.
mfrc.PCD_StopCrypto1();
// No need to keep the tag active.
mfrc.PICC_HaltA();
return true;
return status == MFRC522Constants::STATUS_OK;
}