topic Re: PN7462 lockup at phhalRf_PCD_Exchg call in NFC

PN7462 lockup at phhalRf_PCD_Exchg call

itrslin — Wed, 17 Oct 2018 06:22:35 GMT

Hi All,

Here is my code snip:

        /** ======= Generate FeliCa Read Block Command */
        if (FCLIB_ReadBlockv2(blockNum, blockList, gTxBuffer, &timeout) !=
            FCLIB_SUCCESS) {
            LOG_TXT("FCLIB_ReadBlockv2 failed.\n");
            igs_record_err(idm, FC_ERR_READ_BLOCKV2);
            return false;
        }

        DBG_OUT("Read blk\r\n");
        phUser_Wait(10000);
        //        igs_print_hex(gTxBuffer, 20);
                phUser_Wait(1000000);

=======> remove card here

        phhalWdt_Refresh();
        cmdRetry = 1;
        /** Send Short command for Req C*/
        do {
            wStatus = phhalRf_PCD_Exchg(gTxBuffer, gRxBuffer, gTxBuffer[0],
                                        &sRxParams); // =======> blocked here
            phUser_Wait(100000);
        } while (wStatus != 0 && cmdRetry > 0);

if (wStatus != 0) igs_record_err(idm, FC_ERR_READ_BLOCKV2);
PH_RETURN_ON_FAILURE(wStatus)

DBG_OUT("Read blk cmd\r\n");
phUser_Wait(10000);

The code is used to issue block reading for Felica card. However there is potential lockup on block reading if card is removed before the phhalRf_PCD_Exchg() call. It's blocking and never return.

I tried using debug and here is screenshot of call trace as attachment.

Any idea and solution to avoid never back blocking ?

BR,

Sam

Re: PN7462 lockup at phhalRf_PCD_Exchg call

Kan_Li — Wed, 24 Oct 2018 09:23:57 GMT

There will be PH_ERR_IO_TIMEOUT returned in cases of Transmission does not completed or Reception does not happen.

Please kindly check the return value of phhalRf_PCD_Exchg() in your case.

Have a great day,
Kan

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Re: PN7462 lockup at phhalRf_PCD_Exchg call

itrslin — Wed, 24 Oct 2018 09:38:18 GMT

Hi Sir,

My problem is the call never return. It locks.

BR,

Sam

Re: PN7462 lockup at phhalRf_PCD_Exchg call

Kan_Li — Thu, 25 Oct 2018 07:18:15 GMT

Hi Sam,

Thanks for the information! Would you please specify the version of NFC reader library for PN7462?

Thanks for your patience!

Have a great day,
Kan

Re: PN7462 lockup at phhalRf_PCD_Exchg call

itrslin — Fri, 26 Oct 2018 02:53:41 GMT

The phhalRf_PCD_Exchg() is from

PN7462AU-FW_v05.19.00

BR,

Sam

Re: PN7462 lockup at phhalRf_PCD_Exchg call

Kan_Li — Tue, 30 Oct 2018 09:02:23 GMT

Hi Sam,

We are trying to reproduce this issue here, but without any FeliCa card, did you try with other types of card? Did it behave the same? Please kindly clarify.

Thanks for your patience!

Have a great day,
Kan

Re: PN7462 lockup at phhalRf_PCD_Exchg call

Kan_Li — Wed, 31 Oct 2018 05:35:30 GMT

Hi Sam,

We finally found a 424 FeliCa card, and these are the reproduction steps:

First, I started RF example from 5.19
I placed BP (breakpoint) on the phhalRf_PCD_Exchg() so just before reading command is executed
I approached the card to the antenna. I have 424 Felica card here
When the MCU stopped at BP I removed the card and executed the command
Result is that it returns TIMEOUT:
This is:Also tested here before ReqC command, with the same outcome again timeout:
So, my conclusion is that under normal circumstances this is not reproducible.
Is there a possibility you test with the same card, so we can corner the problem?

Have a great day,
Kan

Re: PN7462 lockup at phhalRf_PCD_Exchg call

itrslin — Wed, 31 Oct 2018 05:53:07 GMT

Hi Kan,

In our case:

a. detect Felica card

b. Authenticate Felica with SAM card

c. After authentication, read block data from Felica

d. print out data

The lockup happens on c. (block data reading) when removing card.

It's 100% reproducable. However I understand for you to setup the SAM environment is not easy.

(The SAM / Felica is from project, SAM is from SONY RC-S500)

BR,

Sam

Re: PN7462 lockup at phhalRf_PCD_Exchg call

Kan_Li — Thu, 01 Nov 2018 07:18:41 GMT

Hi Sam,

Thanks for the information! Did you set a breakpoint at a line before calling phhalRf_PCD_Exchg()?When did you remove the card ? right after the breakpoint hit? Did this issue happen after you continue to run the application? Please kindly clarify.

Thanks for your patience!

Have a great day,
Kan

Re: PN7462 lockup at phhalRf_PCD_Exchg call

itrslin — Fri, 02 Nov 2018 03:47:04 GMT

Hi Kan,

1. set breackpoint at line before calling phhalRf_PCD_Exchg()

2. remove card

3. continue to run

The code blocked at phhalRf_PCD_Exchg() and never return.

BR,

Sam