NFC Reader PN7150 - Reading Session register and SRAM from RF side

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NFC Reader PN7150 - Reading Session register and SRAM from RF side

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bhavinkapadia
Contributor I

Hi,

Setup:

FRDM-k64f connected to PN7150 over I2C

FRDM-k64f connected to NT3H2211 (NXP NTAG PLUS) over I2C

I am able to read/write registers and SRAM from I2C side but I have trouble reading register and SRAM from NFC side.

Since I am using NTAG plus, session register is in SECTOR 0(I don't know how I figured this out) at the address 0xEC. Now, I am sending the following DATA PACKET

static const uint8_t sessionRegisterReadPayload[DATA_PACKET_SIZE] =
{
0x00, // Connection ID = 0x00, Static RF connection ID
0x00, // Second part of header is always empty
0x2,   // next 2 bytes
0x30, // Read command
0xEC, // Start Address
};

What should I be expecting in response (number of bytes)? Is the response again in the DATA PACKET format?

For Reading SRAM, I send the following DATA PACKET to read the SRAM and checked "SRAM_RF_READY" bit is set to 1 from I2C side.

static const uint8_t dataFastReadPayload[DATA_FAST_READ_SIZE] =
{
0x00, // Connection ID = 0x00, Static RF connection ID
0x00, // Second part of header is always empty
0x3, // Next 3 bytes,
0x3A, // Read complete SRAM command
0xF0, // Start Address
0xFF, // End Address
};@

Do I need to set "SRAM_MIRROR_ON_OFF"? I never set this while writing to SRAM from NFC side and was able to right the data to SRAM successfully (can tell this since "SRAM_I2C_READY" was set).

Please advice asap. Thank you!

 

@Jorge_Gonzalez

Labels (1)
4 Replies

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sjedrasik
Contributor II

Hi 

I have also faced that problem.

Can I ask for a link once again?

That one provided does not work :smileysad:

Best Regards

Sebastian

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1,001 Views
Kan_Li
NXP TechSupport
NXP TechSupport

Hi Sebastian,

Are you looking for this one? https://www.nxp.com/downloads/en/snippets-boot-code-headers-monitors/SW3647.zip 


Have a great day,
Kan

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sjedrasik
Contributor II

Hi Kan

Nice that You asked. Actually I managed to make it work week ago :smileyhappy:

I have data flow both directions quite smooth :smileyhappy:

Thank You anyway. Have a nice day

Best Regards

*Sebastian Jedrasik | *R&D Engineer

Tel: +47 22 64 55 55 | Mobile: +47 92 499 288

Eikenga 31C, 0579 Oslo NORWAY

<https://maps.google.com/?q=Eikenga31C,0579OsloNORWAY&entry=gmail&source=g>

Detection for real safety - for real life

Den tir. 25. sep. 2018 kl. 11:20 skrev Kan_Li <admin@community.nxp.com>:

NXP Community

<https://community.freescale.com/resources/statics/1000/35400-NXP-Community-Email-banner-600x75.jpg>

Re: NFC Reader PN7150 - Reading Session register and SRAM from RF side

reply from Kan_Li

<https://community.nxp.com/people/Kan_Li?et=watches.email.thread> in NFC

- View the full discussion

<https://community.nxp.com/message/1060975?commentID=1060975&et=watches.email.thread#comment-1060975>

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Kan_Li
NXP TechSupport
NXP TechSupport

Hi Bhavin,

There is a demo for NTAG I2C Plus devices, please kindly refer to http://www.nxp.com/documents/software/SW3647.zip for details.

Hope that helps,


Have a great day,
Kan

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