Comments (4)
clausecker
commented on June 22, 2024
Why don't you do any error checking, especially with the type assertions? Please make sure that all type assertions are successful. In the meanwhile, let me check what went wrong.
The code hasn't been really tested (cf. README), let me see what I missed in there.
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clausecker
commented on June 22, 2024
It seems like I get a NULL pointer somewhere. I should definitely check for that in case someone forgets to check for errors.
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Lesterpig
commented on June 22, 2024
Thank you for you answer.
Here is an updated version with its result:
func Connect(device nfc.Device) (*freefare.DESFireTag, error) {
// Scan for tags
modulation := nfc.Modulation{
Type: nfc.ISO14443a,
BaudRate: nfc.Nbr424,
}
nfcTag, err := device.InitiatorSelectPassiveTarget(modulation, nil)
fmt.Println(err)
isoTarget, ok := nfcTag.(*nfc.ISO14443aTarget)
fmt.Println(ok)
rawTag, err := freefare.NewTag(device, isoTarget)
fmt.Println(err)
tag := rawTag.(freefare.DESFireTag)
fmt.Println(tag)
err = tag.Connect()
if err != nil {
return nil, err
}
return &tag, nil
}<nil>
true
<nil>
Mifare DESFire
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x2 addr=0x7f53647f9c47 pc=0x7f537bb9e9b8]
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clausecker
commented on June 22, 2024
Well, okay, that's interesting. Let me debug further.
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