Beginner
10 min

Get ready for unparalleled speed and data capacity thanks to TCAN1462 and PIC32MZ1024EFH064

Experience the best of both worlds: CAN for stability, CAN FD for speed

CAN FD 7 Click with PIC32MZ clicker

Published Nov 15, 2023

Click board™

CAN FD 7 Click

Dev. board

PIC32MZ clicker

Compiler

NECTO Studio

MCU

PIC32MZ1024EFH064

Empower your network with a CAN transceiver that adapts to the demands of today's dynamic environments. Our solution effortlessly bridges the worlds of CAN and CAN FD, offering you the flexibility and speed you need for your evolving applications.

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Hardware Overview

How does it work?

CAN FD 7 Click is based on the TCAN1462, an automotive fault-protected CAN FD transceiver from Texas Instruments. The transceiver is data rate agnostic, making it backward compatible for supporting classical CAN applications while also supporting CAN FD networks up to 8 Mbps. It actively improves the bus signal by reducing ringing effects in complex topologies, enabling higher throughput. In addition, the transceiver has a much tighter bit of timing symmetry, which provides a larger timing window to sample the correct bit and enables error-free communication in large complex star networks where ringing and bit distortion are inherent. It also has a passive behavior when unpowered and supports a hot plug, with power up or down glitch-free

operation. As for protection, the transceiver features IEC ESD protection, under-voltage, thermal shutdown, TXD dominant state timeout, and more. This Click board™ comes equipped with the industry-standard DE-9 connector, making interfacing with the CAN bus simple and easy. Besides, the user can connect the CAN signals directly through the CAN External header located on the board's left edge (unpopulated by default). The same goes for the UART signals over the TXD/RXD header. The termination 120Ω resistor labeled TERM allows CAN termination to the bus, which you can disable. CAN FD 7 Click uses a standard UART interface to communicate with the host MCU with commonly used UART RX and TX pins. Besides the normal mode, the transceiver

has standby mode support, which puts the transceiver in ultra-low current consumption mode, which, upon receiving a valid wake-up pattern (WUP) on the CAN bus, signals to the microcontroller through the RXD pin. The MCU can then put the device into normal mode using the standby mode STB input pin. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VIO SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

CAN FD 7 Click hardware overview image

Features overview

Development board

PIC32MZ Clicker is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit PIC32MZ microcontroller with FPU from Microchip, a USB connector, LED indicators, buttons, a mikroProg connector, and a header for interfacing with external electronics. Thanks to its compact design with clear and easy-recognizable silkscreen markings, it provides a fluid and immersive working experience, allowing access anywhere and under

any circumstances. Each part of the PIC32MZ Clicker development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the PIC32MZ Clicker programming method, using USB HID mikroBootloader, or through an external mikroProg connector for PIC, dsPIC, or PIC32 programmer, the Clicker board also includes a clean and regulated power supply module for the development kit. The USB Micro-B connection can provide up to 500mA of current, which is more than enough to operate all onboard

and additional modules. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several buttons and LED indicators. PIC32MZ Clicker is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

PIC32MZ clicker double side image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC32

MCU Memory (KB)

1024

Silicon Vendor

Microchip

Pin count

64

RAM (Bytes)

524288

You complete me!

Accessories

DB9 Cable Female-to-Female (2m) cable is essential for establishing dependable serial data connections between devices. With its DB9 female connectors on both ends, this cable enables a seamless link between various equipment, such as computers, routers, switches, and other serial devices. Measuring 2 meters in length, it offers flexibility in arranging your setup without compromising data transmission quality. Crafted with precision, this cable ensures consistent and reliable data exchange, making it suitable for industrial applications, office environments, and home setups. Whether configuring networking equipment, accessing console ports, or utilizing serial peripherals, this cable's durable construction and robust connectors guarantee a stable connection. Simplify your data communication needs with the 2m DB9 female-to-female cable, an efficient solution designed to meet your serial connectivity requirements easily and efficiently.

CAN FD 7 Click accessories image

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
Standby Mode Control
RE5
RST
ID COMM
RG9
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
UART TX
RB2
TX
UART RX
RB0
RX
NC
NC
SCL
NC
NC
SDA
Power Supply
5V
5V
Ground
GND
GND
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Take a closer look

Click board™ Schematic

CAN FD 7 Click Schematic schematic

Step by step

Project assembly

PIC32MZ clicker front image hardware assembly

Start by selecting your development board and Click board™. Begin with the PIC32MZ clicker as your development board.

PIC32MZ clicker front image hardware assembly
GNSS2 Click front image hardware assembly
Prog-cut hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
Micro B Connector Clicker Access - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Flip&Click PIC32MZ MCU step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Track your results in real time

Application Output

1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support

Library Description

This library contains API for CAN FD 7 Click driver.

Key functions:

  • canfd7_generic_write - CAN FD 7 data writing function.

  • canfd7_generic_read - CAN FD 7 data reading function.

  • canfd7_set_stb_pin - CAN FD 7 set STB pin function.

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * @file main.c
 * @brief CAN FD 7 Click Example.
 *
 * # Description
 * This example writes and reads and processes data from CAN FD 7 Click.
 * The library also includes a function for selection of the output polarity.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and performs the click default configuration.
 *
 * ## Application Task
 * This example contains Transmitter/Receiver task depending on uncommented code.
 * Receiver logs each received byte to the UART for data logging,
 * while the transmitter sends messages every 2 seconds.
 *
 * ## Additional Function
 * - static err_t canfd7_process ( canfd7_t *ctx )
 *
 * @author Stefan Ilic
 *
 */

#include "board.h"
#include "log.h"
#include "canfd7.h"

#define PROCESS_BUFFER_SIZE 200
#define TX_MESSAGE "CAN FD 7 Click \r\n"

// Comment out the line below in order to switch the application mode to receiver.
#define DEMO_APP_TRANSMITTER

static canfd7_t canfd7;
static log_t logger;

static uint8_t app_buf[ PROCESS_BUFFER_SIZE ] = { 0 };
static int32_t app_buf_len = 0;

/**
 * @brief CAN FD 7 data reading function.
 * @details This function reads data from device and concatenates data to application buffer. 
 * @param[in] ctx : Click context object.
 * See #canfd7_t object definition for detailed explanation.
 * @return @li @c  0 - Read some data.
 *         @li @c -1 - Nothing is read.
 * See #err_t definition for detailed explanation.
 * @note None.
 */
static err_t canfd7_process ( canfd7_t *ctx );

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    canfd7_cfg_t canfd7_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    canfd7_cfg_setup( &canfd7_cfg );
    CANFD7_MAP_MIKROBUS( canfd7_cfg, MIKROBUS_1 );
    if ( UART_ERROR == canfd7_init( &canfd7, &canfd7_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    canfd7_default_cfg ( &canfd7 );
    
#ifdef DEMO_APP_TRANSMITTER
    log_info( &logger, "---- Transmitter mode ----" );
#else
    log_info( &logger, "---- Receiver mode ----" );
#endif 
    
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
#ifdef DEMO_APP_TRANSMITTER
    canfd7_generic_write( &canfd7, TX_MESSAGE, strlen( TX_MESSAGE ) );
    log_info( &logger, "---- Data sent ----" );
    Delay_ms( 2000 );
#else
    canfd7_process( &canfd7 );
#endif
}

void main ( void ) 
{
    application_init( );

    for ( ; ; ) 
    {
        application_task( );
    }
}

static err_t canfd7_process ( canfd7_t *ctx ) 
{
    uint32_t rx_size;
    char rx_buf[ PROCESS_BUFFER_SIZE ] = { 0 };
    rx_size = canfd7_generic_read( &canfd7, rx_buf, PROCESS_BUFFER_SIZE );
    if ( rx_size > 0 ) 
    {
        log_printf( &logger, "%s", rx_buf );
        return CANFD7_OK;
    }
    return CANFD7_ERROR;
}

// ------------------------------------------------------------------------ END

Additional Support

Resources

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