topic Re: Question about "NXP PN7160 example code" in LPC Microcontrollers

Question about "NXP PN7160 example code"

BruceChang — Fri, 26 May 2023 06:41:29 GMT

Hi .

PN7160 NXP-NCI MCUXpresso Example Project (SW6705.zip)
The example code is one way to display message through UART port.
Example : main.c call nfc_example(); to display NFC TAG information.

---------------------------------------------------------------------------------------------------------------
I want to change it; Let User can typing command to read or write NFC TAG.

Is it have some method to reach the target ?

Thanks

Re: Question about "NXP PN7160 example code"

xiangjun_rong — Fri, 26 May 2023 08:51:33 GMT

Hi,

In the SDK package, there is shell example, you can use it to communicate between PC and the LPC so that the LPC can execute the instruction to read/write PN7160 which you send via shell and return the result to PC via uart.

But I suppose that the LPC55xx and i.mxrt117x have the shell example in SDK, it is easy for you to modify it to adapt your application. The low cost LPC82x does not have the shell example in SDK.

Hope it can help you

XiangJun Rong

Re: Question about "NXP PN7160 example code"

BruceChang — Fri, 26 May 2023 09:18:16 GMT

Unfortunately, we are use LPC82x....>_<

So, I need to check with LPC55xx and i.mxrt117x example in SDK and hope it is easy porting to LPC82x.

Thanks

Re: Question about "NXP PN7160 example code"

BruceChang — Thu, 01 Jun 2023 08:27:52 GMT

NDEF record received has bug :

My Tag has write data(1234567890)

The example code is always read data as below:

---------------------------------------------------------------------------

Running the NXP-NCI2.0 example.

WAITING FOR DEVICE DISCOVERY

- POLL MODE: Remote T2T activated

SENS_RES = 0x44 0x0

NFCID = 04 70 1d a2 a5 70 80

SEL_RES = 0x0

--- NDEF record received:

Text record: 1234567

CARD REMOVED

WAITING FOR DEVICE DISCOVERY

---------------------------------------------------------------------------

The wrong code on here :

nfc_example_RWandCE.c

void NdefPull_Cb(unsigned char *pNdefMessage, unsigned short ReceivedSize, unsigned int NdefMessageSize)

{

...

case WELL_KNOWN_SIMPLE_TEXT:

{

save = NdefRecord.recordPayload[NdefRecord.recordPayloadSize];

NdefRecord.recordPayload[NdefRecord.recordPayloadSize] = '\0';

PRINTF(" Text record: %s\n", &NdefRecord.recordPayload[NdefRecord.recordPayload[0]+1]);

NdefRecord.recordPayload[NdefRecord.recordPayloadSize] = save;

}

break;

...

}

When I print the data before and after, the '\0' is put wrong place. (38 ---> 00)

NdefRecord.recordPayload : 02 65 6e 31 32 33 34 35 36 37 38 39 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ...

Text record: 1234567

NdefRecord.recordPayload : 02 65 6e 31 32 33 34 35 36 37 00 39 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ...

My modify code as below :

int eol = NdefRecord.recordPayload[0]+1+NdefRecord.recordPayloadSize;

save = NdefRecord.recordPayload[eol];

NdefRecord.recordPayload[eol] = '\0';

PRINTF(" Text record: %s\n", &NdefRecord.recordPayload[NdefRecord.recordPayload[0]+1]);

NdefRecord.recordPayload[eol] = save;

The test result as below :

---------------------------------------------------------------------------

Running the NXP-NCI2.0 example.

WAITING FOR DEVICE DISCOVERY

- POLL MODE: Remote T2T activated

SENS_RES = 0x44 0x0

NFCID = 04 70 1d a2 a5 70 80

SEL_RES = 0x0

--- NDEF record received:

Text record: 1234567890

CARD REMOVED

WAITING FOR DEVICE DISCOVERY

---------------------------------------------------------------------------