I try to use PN532 to read a card, and it fail. Attached is the PN532 driver code and below is the main function code
while (1)
{
uint8_t success;
uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0}; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
// Wait for an ISO14443A type cards (Mifare, etc.). When one is found
// 'uid' will be populated with the UID, and uidLength will indicate
// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
success = pn532_readPassiveTargetID(&nfc, PN532_MIFARE_ISO14443A, uid, &uidLength, 0);
if (success)
{
// Display some basic information about the card
// ESP_LOGI(TAG, "Found an ISO14443A card");
ESP_LOGI(TAG, "Found an card");
ESP_LOGI(TAG, "UID Length: %d bytes", uidLength);
ESP_LOGI(TAG, "UID Value:");
// esp_log_buffer_hexdump_internal(TAG, uid, uidLength, ESP_LOG_INFO);
ESP_LOG_BUFFER_HEX_LEVEL(TAG, uid, uidLength, ESP_LOG_INFO);
if(uidLength==4)
{
mifare_classic_handling();
}
else if(uidLength==7)
{
mifare_ultralight_handling();
}else
{
ESP_LOGE(TAG, "unknown card detected");
}
vTaskDelay(1000 / portTICK_RATE_MS);
}
else
{
// PN532 probably timed out waiting for a card
ESP_LOGI(TAG, "Timed out waiting for a card");
}
if(++count>=255)
count =0;
}
void mifare_classic_handling(void)
{
uint8_t write_buffer[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
uint8_t read_buffer[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
ESP_LOGI(TAG, "mifare classic");
write_buffer[0]=count;
/*
ESP_LOGI(TAG, "write test data:");
ESP_LOG_BUFFER_HEX_LEVEL(TAG, write_buffer, 4, ESP_LOG_INFO);
if(pn532_mifareclassic_WriteDataBlock(&nfc,0,write_buffer)==1)
{
ESP_LOGI(TAG, "write test data succeed");
}else ESP_LOGI(TAG, "write test data fail");
*/
ESP_LOGI(TAG, "read test data:");
if(pn532_mifareclassic_ReadDataBlock(&nfc,0,read_buffer)==1)
{
ESP_LOGI(TAG, "read test data succeed");
ESP_LOG_BUFFER_HEX_LEVEL(TAG, read_buffer, 16, ESP_LOG_INFO);
}else
{
ESP_LOGI(TAG, "read test data fail");
}
}
The console log output of the firmware is as following when I put a card above the pn532 antenna. It seems that it can read UID of the card. But it cannot read the data of the card. Please comment on this issue
I (32030) APP: Found an card
I (32030) APP: UID Length: 4 bytes
I (32030) APP: UID Value:
I (32030) APP: ba 08 f7 3f
I (32030) APP: mifare classic
I (32030) APP: read test data:
Trying to read 16 bytes from block 0
Unexpected response: 00 ff 03 fd d5 41 13 d7 00 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
I (32410) APP: read test data fail
