Запись CoreNFC в тег iCode Slix2 кажется нестабильной ⇐ IOS

[Гость]

I am using

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CoreNFC

on

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iOS

to flash some iCode Slix2 NFC tags.

The problem I have is that sometimes i'll get successfully through my writes, but the majority of the time I get either of these errors:

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Error Domain=NFCError Code=100 "Tag connection lost" UserInfo={NSLocalizedDescription=Tag connection lost}

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Error Domain=NFCError Code=102 "Tag response error" UserInfo={NSLocalizedDescription=Tag response error, ISO15693TagResponseErrorCode=15}

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Error Domain=NFCError Code=401 "Stack Error" UserInfo={NSLocalizedDescription=Stack Error, NSUnderlyingError=0x3017960d0 {Error Domain=nfcd Code=21 "writeNdefData:toTag:nLengthOptimization:error::403" UserInfo={Line=403, NSLocalizedDescription=Connection Closed, NSDebugDescription=writeNdefData:toTag:nLengthOptimization:error::403, Method=writeNdefData:toTag:nLengthOptimization:error:}}}

How can I find what

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ISO15693TagResponseErrorCode=15

means?

As an example of one of my writes, it's to completely erase the tag.

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    func erase(tag: NFCISO15693Tag) async throws {         print("🏷️", "ERASING TAG")         alertMessage = "ERASING TAG..."                  let sysInfo = try await getSystemInfo(from: tag)         let totalBlocks = sysInfo.totalBlocks - 1         let blockSize = sysInfo.blockSize         var blockNumber: UInt8 = 0                  func writeNextBlock() async throws {             if blockNumber < totalBlocks {                                  alertMessage = "ERASING TAG \(blockNumber)/\(totalBlocks)"                                  let blankData = Data(repeating: 0x00, count: blockSize)                 try await write(data: blankData, to: tag, at: blockNumber)                                  // Move to the next block                 blockNumber += 1                 try await writeNextBlock()             } else {                 // All blocks have been erased                 alertMessage = "Tag erased successfully!"             }         }                  // Start writing to the first block         try await writeNextBlock()     }     func write(data: Data, to tag: NFCISO15693Tag, at block: UInt8) async throws {         print("🏷️", "Writing data:", data, data.hexEncodedString(.upperCase), "at block:", block)                  try await tag.writeSingleBlock(requestFlags: [.highDataRate], blockNumber: block, dataBlock: data)     } 

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@MainActor     private func eraseTag() {                  session = NFCTagReaderSession(pollingOption: [.iso15693], delegate: self, queue: nil)         session?.alertMessage = "Hold your iPhone near a new NFC tag."         session?.begin()     } func tagReaderSession(_ session: NFCTagReaderSession, didDetect tags: [NFCTag]) {                  guard tags.count == 1 else {             session.invalidate(errorMessage: "Can not write to more than one tag.")             return         }                  let currentTag = tags.first!         guard case .iso15693(let iso15693Tag) = currentTag else {             session.invalidate(errorMessage: "Tag is not iso15693")             return         }                  Task {             do {                 try await session.connect(to: currentTag)                 print("Connected: ========\(currentTag.isAvailable)========")                                  try await session.erase(tag: iso15693Tag)                                  session.invalidate()                              } catch {                 print("❗️", error)                 session.invalidate(errorMessage: error.localizedDescription)             }         }     } 

A lot of the time this won't get half way through writing the 79 blocks of the tag, but occasionally it will succeed.

I get the error sometimes when reading too, however if I use the NFC Tools app it manages to read the chip a lot more than my app can. Is there some additional parameters or setup I need? Or perhaps I have a threading issue?


Источник: https://stackoverflow.com/questions/781 ... eem-stable