nfc7i2c 2.1.0.0
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NFC 7 I2C Click

‍NFC 7 Click (I2C) is an add-on board that integrates NFC functionality in various applications. This board features the PN7160, a Near Field Communication (NFC) controller from NXP that is compliant with NFC Forum and NCI 2.0 standards. The board features an I2C communication interface, low-power consumption modes, and a new-generation RF contactless front-end design with high sensitivity and dynamic load modulation for reliable communication. It supports multiple NFC standards, including ISO/IEC 14443, ISO/IEC 15693, MIFARE, and FeliCa, and offers standalone card emulation functionality.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Oct 2024.
  • Type : I2C type

Software Support

We provide a library for the NFC 7 I2C Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

‍This library contains API for NFC 7 I2C Click driver.

Standard key functions :

Example key functions :

Example Description

‍This example demonstrates the use of NFC 7 I2C Click board by handling the detection and processing of various NFC technologies and protocols, and ensuring the application can respond to different NFC card types (A,B,F,V).

The demo application is composed of two sections :

Application Init

‍Initializes the driver and logger, performs the Click default configuration and reads the device firmware version.

void application_init ( void )
{
log_cfg_t log_cfg;
nfc7i2c_cfg_t nfc7i2c_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
nfc7i2c_cfg_setup( &nfc7i2c_cfg );
NFC7I2C_MAP_MIKROBUS( nfc7i2c_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == nfc7i2c_init( &nfc7i2c, &nfc7i2c_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( NFC7I2C_ERROR == nfc7i2c_default_cfg ( &nfc7i2c ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_printf( &logger, " FW version: %.2X.%.2X.%.2X\r\n",
( uint16_t ) nfc7i2c.fw_version[ 0 ],
( uint16_t ) nfc7i2c.fw_version[ 1 ],
( uint16_t ) nfc7i2c.fw_version[ 2 ] );
log_info( &logger, " Application Task " );
}
#define NFC7I2C_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition nfc7i2c.h:340
void application_init(void)
Definition main.c:86
@ NFC7I2C_ERROR
Definition nfc7i2c.h:508

Application Task

‍Waits for an NFC device to be discovered, checks if it supports a known NFC technology, and then handles the device based on its protocol. The application continues processing the device (reading and writing information) and waits until the card is removed. Once the card is removed, the discovery process is restarted to detect a new NFC device.

void application_task ( void )
{
log_printf( &logger, " WAITING FOR DEVICE DISCOVERY\r\n\n" );
if ( NFC7I2C_OK == nfc7i2c_wait_discovery ( &nfc7i2c, &rf_intf ) )
{
{
for ( ; ; )
{
nfc7i2c_display_card_info ( rf_intf );
switch ( rf_intf.protocol )
{
{
nfc7i2c_handle_iso14443_3a ( &nfc7i2c );
break;
}
{
nfc7i2c_handle_iso14443_4 ( &nfc7i2c );
break;
}
{
nfc7i2c_handle_iso15693 ( &nfc7i2c );
break;
}
{
nfc7i2c_handle_mifare ( &nfc7i2c );
break;
}
default:
{
break;
}
}
if ( !rf_intf.more_tags )
{
break;
}
nfc7i2c_reader_act_next ( &nfc7i2c, &rf_intf );
}
nfc7i2c_presence_check ( &nfc7i2c, &rf_intf );
log_printf ( &logger, " - CARD REMOVED\r\n\n" );
nfc7i2c_stop_discovery ( &nfc7i2c );
while ( NFC7I2C_OK != nfc7i2c_start_discovery ( &nfc7i2c ) );
}
else
{
log_printf ( &logger, " - WRONG DISCOVERY\r\n\n" );
}
}
}
#define NFC7I2C_NCI_RF_TECH_PASSIVE_POLL_15693
Definition nfc7i2c.h:182
#define NFC7I2C_NCI_RF_PROT_T5T
Definition nfc7i2c.h:195
#define NFC7I2C_NCI_RF_PROT_ISODEP
Definition nfc7i2c.h:193
#define NFC7I2C_NCI_RF_PROT_MIFARE
Definition nfc7i2c.h:196
#define NFC7I2C_NCI_RF_PROT_T2T
Definition nfc7i2c.h:191
#define NFC7I2C_NCI_RF_TECH_PASSIVE_POLL_NFC_A
NFC 7 I2C RF technologies and mode setting.
Definition nfc7i2c.h:179
#define NFC7I2C_NCI_RF_TECH_PASSIVE_POLL_NFC_B
Definition nfc7i2c.h:180
#define NFC7I2C_NCI_RF_TECH_PASSIVE_POLL_NFC_F
Definition nfc7i2c.h:181
err_t nfc7i2c_start_discovery(nfc7i2c_t *ctx)
NFC 7 I2C start discovery function.
err_t nfc7i2c_reader_act_next(nfc7i2c_t *ctx, nfc7i2c_rf_intf_t *rf_intf)
NFC 7 I2C reader activate next function.
void application_task(void)
Definition main.c:126
@ NFC7I2C_OK
Definition nfc7i2c.h:507
uint8_t more_tags
Definition nfc7i2c.h:424
uint8_t protocol
Definition nfc7i2c.h:422
uint8_t mode_tech
Definition nfc7i2c.h:423

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.NFC7I2C

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.