Mikroelektronika d.o.o.
Carte à clic MCP251863
Carte à clic MCP251863
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Key Features:
- Étend le MCU existant avec l'option de connectivité CAN fiable et robuste, la prise en charge des trames CAN 2.0B et CAN FD, une communication CAN haut débit jusqu'à 5 Mbps, un connecteur DE-9 intégré, et plus encore
- Basé sur le MCP251863 - Contrôleur CAN FD avec une interface SPI et un émetteur-récepteur CAN haute vitesse de Microchip
- Peut être utilisé pour développer une large gamme d'applications de diagnostic automobile, même sur des microcontrôleurs qui ne prennent pas en charge nativement l'interface CAN
- mikroBUS : interfaces SPI, PWM et GPIO
REMARQUE : Cette carte Click™ représente une version optimisée de la carte Click™ MCP2518FD dans le but d'un matériel plus efficace, où le contrôleur et l'émetteur-récepteur, dans ce cas, peuvent être trouvés dans un seul package.
La carte Click Board™ MCP251863 est une carte complémentaire compacte représentant une solution CAN complète utilisée comme nœud de contrôle dans un réseau CAN. Cette carte comprend le MCP251863, un circuit intégré représentant une solution compacte avec un contrôleur CAN FD (MCP2518FD) et un émetteur-récepteur CAN dans un seul boîtier (ATA6563) de Microchip. Un émetteur-récepteur CAN à grande vitesse fournit une connexion physique avec le bus CAN lui-même, tandis que le contrôleur CAN représente une interface entre le MCU et l'émetteur-récepteur CAN. Il dispose de trois modes de fonctionnement avec des fonctions de sécurité intégrées dédiées, un réveil à distance via CAN et un comportement idéalement passif lorsqu'il est mis hors tension sur le bus CAN. Cette carte Click Board™ convient au développement d'une large gamme d'applications de diagnostic automobile, même sur des MCU qui ne prennent pas en charge l'interface CAN.
La carte Click Board™ MCP251863 est prise en charge par une bibliothèque compatible mikroSDK, qui comprend des fonctions qui simplifient le développement logiciel. Cette carte Click Board™ est un produit entièrement testé, prêt à être utilisé sur un système équipé du socket mikroBUS™.
How Does The MCP251863 Click Board™ Work?
The MCP251863 Click Board™ as its foundation uses the MCP251863, an IC representing a compact solution containing a CAN FD controller with an SPI interface and a high-speed CAN transceiver from Microchip. The high-speed CAN transceiver provides a physical connection with the CAN bus itself, while the CAN controller represents an interface between the MCU and the transceiver. The role of the CAN controller is to provide arbitration, message framing, message validation, error detection, message filtering, and more. Among all other tasks, it offers formatted CAN data for the application layer, running on the host MCU.
The MCP251863 communicates with MCU using the SPI interface, allowing communication speeds up to 5Mbps and supporting Normal and Standby operational modes. Normal mode is engaged when the STB pin, routed on the AN pin of the mikroBUS™ socket, is at the logic low level, while its transmit pin is held to a high logic level. While in the Normal mode, the data can be sent and received via the CAN H/L bus lines.
The mode selection can be performed by positioning the SMD jumper labelled as STBY to an appropriate position marked as STBY or ON. In Standby mode, if the STBY jumper is set to the STBY position, the user has the option of activating the Standby mode in two ways, where the selection is made by positioning the SMD jumper labelled as STBY SEL to an appropriate position marked as STBY or INT0. This way, the Standby mode can be activated via STB pin from the mikroBUS™ socket or by the MCP251863 interrupt signal IN0 routed to the TX pin of the mikroBUS™ socket (the IN0 pin can also be used to alert the MCU about the TX events).
In addition, the MCP251863 Click Board™ also uses several pins of the mikroBUS™ socket. The CLK pin from the MCP251863 routed to the PWM pin of the mikroBUS™ socket can provide the clock output for the host MCU or represent the start of the frame signal. It is derived from the input clock generated by the onboard chip oscillators, where the onboard SMD jumpers allow frequency selection between 20MHz and 40MHz. Besides, it also uses two interrupt pins, INT and INT1 routed to the INT and RX pins of the mikroBUS™ socket, respectively. While the INT pin is always an interrupt pin, used to alert the MCU of the enabled interrupt event, the INT1 pin alert the MCU about the RX events (if these interrupts are enabled).
In addition, the user can connect the external TX/RX signals to the CAN FD transceiver and CAN bus signals directly through the onboard headers on the left and right sides of the board. This Click board™ comes equipped with the standard DB-9 connector, making interfacing with the CAN bus simple and easy.
The MCP251863 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VIO SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the 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.
SPECIFICATIONS
| Type | CAN,CAN FD |
| Applications | The MCP251863 Click Board™ be used for developing a wide range of automotive diagnostic applications, even on MCUs that do not natively support CAN interface |
| On-board modules | MCP251863 - CAN FD controller with an SPI interface and a high-speed CAN transceiver from Microchip |
| Key Features | Expands the existing MCU with the reliable and robust CAN connectivity option, support for both CAN 2.0B and CAN FD frames, high speed CAN communication up to 5 Mbps, integrated DE-9 connector, and more |
| Interface | GPIO,PWM,SPI |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the MCP251863 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Standby Control | STB | 1 | AN | PWM | 16 | SYN | External sync |
| NC | 2 | RST | INT | 15 | INT | Interrupt | |
| SPI Chip Select | CS | 3 | CS | RX | 14 | IN0 | TX Interrupt |
| SPI Clock | SCK | 4 | SCK | TX | 13 | IN1 | RX Inte |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | NC | |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | NC | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1-JP2 | CRY SEL | Right | External Crystal Selection 20MHz/40MHz: Left position 20MHz, Right position 40MHz |
| JP3 | VIO SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
| JP4 | STBY | Left | Operational Mode Selection STBY/ON: Left position STBY, Right position ON |
| JP5 | STBY SEL | Left | Standby Mode Control Selection STBY/INT0: Left position STBY, Right position INT0 |
| J1 | - | Unpopulated | TX/RX CAN Signals Connection Header |
| J2 | - | Unpopulated | CAN Bus Lines Connection Header |
MCP251863 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| Data Rate | - | - | 5 | Mbps |
| Operating Temperature Range | -40 | +25 | +120 | °C |
Software Support
We provide a library for the MCP251863 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for MCP251863 Click driver.
Key functions
-
mcp251863_transmit_messageTransmits the desired message and checks is message successfully sent. -
mcp251863_receive_messageReceives the message and checks is message successfully received. -
mcp251863_operation_mode_selectFunction for select operation mode.
Example Description
This example demonstrates the use of an MCP251863 Click board™ by showing the communication between the two click boards configured as a receiver and transmitter.
void application_task ( void )
{
#ifdef DEMO_APP_TRANSMITTER
if ( MCP251863_OK == mcp251863_transmit_message( &mcp251863, DEMO_TEXT_MESSAGE, strlen( DEMO_TEXT_MESSAGE ) ) )
{
log_printf( &logger, " The message "%s" has been sent!rn", ( char * ) DEMO_TEXT_MESSAGE );
}
Delay_ms( 2000 );
#else
uint8_t data_buf[ 256 ] = { 0 };
uint16_t data_len = 0;
if ( MCP251863_OK == mcp251863_receive_message( &mcp251863, data_buf, &data_len ) )
{
log_printf( &logger, " A new message has received: "" );
for ( uint16_t cnt = 0; cnt < data_len; cnt++ )
{
log_printf( &logger, "%c", data_buf[ cnt ] );
}
log_printf( &logger, ""rn" );
}
#endif
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The package Manager (recommended), downloaded from our LibStock™ or found on MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.MCP251863
Additional Notes and Information
Depending on the development board you are using, you may need a 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.
MIKROSDK
The MCP251863 Click Board™ is supported with mikroSDK - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Carte à clic MCP251863
Frequently Asked Questions
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