topic Re: NFC function is unable to port on LPC55S16-EVK in LPC Microcontrollers

NFC function is unable to port on LPC55S16-EVK

SY_Kuo — Wed, 31 Mar 2021 09:33:08 GMT

Hello everyone, We are going to use LPC55S16-EVK and CLEV6630ARD to verify the NFC function. I also refer following ticket to integrate the example. https://community.nxp.com/t5/NFC-Knowledge-Base/Using-NFC-Reader-Library-with-LPC55S69/ta-p/1117479

I encountered some problems as below when integrating the example of NfcrdlibEx1_BasicDiscoveryLoop.

1.From the Figure 2 in the ticket, it tells user how to connect both evaluation boards. It list 9 pins needs to be connected. However, the connector J7 and J8 in LPC55S16-EVK doesn't support IF0 and IF1. Are both pins necessary?

2.The MCUXpresso IDE is unable to enter debug mode if the pin RST is connected. How to solve it?

3.In the function of phacDiscLoop_Run, the register "status" always returns 0x4080 and 0x4021.

Please guide me how to solve it. Thanks

Re: NFC function is unable to port on LPC55S16-EVK

diego_charles — Thu, 01 Apr 2021 23:47:30 GMT

Hi @SY_Kuo

I hope you are doing well!

The IF pins from the CLRC663 are used to select the host interface. According to the CLRC663ARD board quickstart guide section -> 2.2 Interface selection, instead of connecting external voltage to the IF pins, you will need to solder resistors to set the value of IF pins and consequently specify the host interface.

Regarding :MCUXpresso IDE is unable to enter debug mode if the pin RST is connected. Do you mean that after connecting the CLRC663 RST pin to GPIO pin PIO1_4 of the EVK you are not able start a new debug session?

Diego.

Re: NFC function is unable to port on LPC55S16-EVK

SY_Kuo — Thu, 08 Apr 2021 02:56:03 GMT

Hi @diego_charles

Understood. So, the requisite pins in the NFC module including MOSI, MISO, SCK, CSEL, RST, IRQ and GND, is it correct? When I double-check the attachment in https://community.nxp.com/t5/NFC-Knowledge-Base/Using-NFC-Reader-Library-with-LPC55S69/ta-p/1117479, I found that the pin defined in attachment is different from the LPC55S69-EVK/LPC55S16-EVK. The pin, RST and IRQ, are defined to P0_15 and P1_10 respectively. But, the pin in EVK should be set to P1_4 and P1_7. Please tell me which configuration is correct.

I've test and put the NFC device near the NFC reader, and nothing happened. So, I also utilized the debug mode to trace the program, and it always blocked at a function called phOsal_Sleep(). I've confirmed those pins are all configured with proper settings, the setting can be find at the Board_LPC55S16RC663.h in the attachment.

Could you help me to check the settings in project. Thanks.

Re: NFC function is unable to port on LPC55S16-EVK

diego_charles — Fri, 09 Apr 2021 06:34:07 GMT

Hi @SY_Kuo

I hope you are doing well!

Yes, according to the CLRC663ARD board quickstart guide , you only require to use the on-board resistors to select the SPI interface. Just to check, do you have the same blue board with the arduino pinout?

Regarding the pin mapping for RST and IRQ pins , in the project lpcxpresso55s69_BasicDiscoveryLoop_BLE-NFC.zip we will find the RST and IRQ maped to P1_4 and P1_7 respectively. So, for the Arduino Reader, that should be the proper mapping of RST and IRQ pins.

Regarding the application stuck at phOsal_Sleep()

Until which point the application is able to RUN before getting stuck into phOsal_Sleep() ? For example we could check the following:

1 Place a breakpoint at the call of the following fuction.

status = phApp_ConfigureLPCD(); CHECK_STATUS(status);

If you cannot get further than CHECK _STATUS function it could mean that the LPC55 it is not communicating by SPI with the CLRC663.

2 If you the program can pass the CHECK_STATUS with no errors, If we let the application run and no card is placed near the reader , we will see that after calling the function :

/* Start discovery loop */ status = phacDiscLoop_Run(pDataParams, wEntryPoint);

The application will wait for an interrupt from the CLRC663 to resume, and get out of phOsal_Sleep() . Is the application stuck here?

My apologies for the delay.

Diego

Re: NFC function is unable to port on LPC55S16-EVK

SY_Kuo — Mon, 12 Apr 2021 05:20:19 GMT

Hi @diego_charles
I got something needs to be clarified.

1. According to the document CLRC663ARD board quickstart guide, the interface is selected to SPI, isn't it?

2. From the lpcxpresso55s69_BasicDiscoveryLoop_CLEV6630b.zip, it was fixed to use the SPI interface to control the NFC reader, isn't it? Should I do further definition to select the SPI?

3. I've referred your recommendation 1 to verify. It did blocked in CHECK_STATUS(status).

4. Could you load the hello_v3.zip into your local IED to check for me?

Re: NFC function is unable to port on LPC55S16-EVK

diego_charles — Fri, 16 Apr 2021 07:59:40 GMT

Hi @SY_Kuo

1. According to the document CLRC663ARD board quickstart guide, the interface is selected to SPI, isn't it?

Yes, clarifying further , the default interface is SPI as stated in the guide. So, for a brand new board, you do not need to solder any resistors to use SPI.

2. From the lpcxpresso55s69_BasicDiscoveryLoop_CLEV6630b.zip, it was fixed to use the SPI interface to control the NFC reader, isn't it? Should I do further definition to select the SPI?

Correct , the example is fixed to use SPI.

3 I've referred your recommendation 1 to verify. It did blocked in CHECK_STATUS(status).

Ok, this seems to tell us that the module it is not communicating with the host LPC55.

You can check with a logic analyzer the SPI frame to diagnostic communication.

Check further, in the function phhalHw_Rc663_Cmd_Lpcd_GetConfig() and see if the program gets stuck there while doing SPI comminication.

Try perform a POR on CLRC663 and your EVB and test again.

4. Could you load the hello_v3.zip into your local IDE to check for me?

I have taken a quick look at your porting , however , I have not found anything out of place.

Diego