control reader command

[mossaab daiki]

Posted on June 29, 2018 at 12:55

Hello, Can I configure ST25 reader to send only 13.56 MHz carrier ? if So how to do that?

[Ulysses HERNIOSUS]

Posted on July 03, 2018 at 08:21

Hi Mossaab,

You just need to enable the Oscillator (en bit in register op control), wait for I_osc, and then set tx_en => constant wave.

Regards, Ulysses

[mossaab daiki]

Posted on July 03, 2018 at 09:40

Hi Ulysses,

thanks for the reply do you recommend a specifi ST25 reader ?

regards

Mossaab

[Ulysses HERNIOSUS]

Posted on July 09, 2018 at 10:24

Hi Mossaab, 

to date there is only one chip available on the boards in the web shop: ST25R3911B. You can either get it as ST25R311B-DISCO with a PC software or as a nucleo shield: X-NUCLEO_NFC05A1.

ST25R3912 .. ST25R3915 are compatible variants.

For your own developments the nucleo shield might be more suited.

Regards, Ulysses

[mossaab daiki]

Posted on July 10, 2018 at 10:05

Thanks Ulysses

I have now the TR25R3911B-Disco. folowing your previous response couled you please guide me more for this steps:

• what's the the en bit number of the oscillator?
• where can i find I OSC as your recommend?
• if there are any document can help to set what i need could you please  tell where i can find it?
• Actually I did find that transparent mode has 00CD ID is it correct?

many thanks

mossaab

[Ulysses HERNIOSUS · Accepted solution]

Posted on July 10, 2018 at 14:28

Hi,

please have a look into the DS (

https://www.st.com/resource/en/datasheet/st25r3911b.pdf

 :( Search for 'en' 'I_osc', etc. 

Transparent mode has 0xdc, no 16 bits!

Regards, Ulysses