canbus  2.0.0.0
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CAN Bus click

CAN Bus Click is a compact add-on board that provides a link between the CAN protocol controller and the physical wires of the bus lines in a control area network (CAN). This board features the MAX13054, an industry-standard, high-speed CAN transceiver with extended ±80V fault protection from Maxim Integrated.

click Product page


Click library

  • Author : Nenad Filipovic
  • Date : Apr 2021.
  • Type : UART type

Software Support

We provide a library for the CanBus 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 CanBus Click driver.

Standard key functions :

Example key functions :

Example Description

This library contains API for CAN Bus click boardâ„¢. This example transmits/receives and processes data from CAN Bus click. The library initializes and defines the UART bus drivers to transmit or receive data.

The demo application is composed of two sections :

Application Init

Initializes driver, wake-up module, and set high-speed operation mode.

void application_init ( void ) {
log_cfg_t log_cfg;
canbus_cfg_t canbus_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
canbus_cfg_setup( &canbus_cfg );
CANBUS_MAP_MIKROBUS( canbus_cfg, MIKROBUS_1 );
err_t init_flag = canbus_init( &canbus, &canbus_cfg );
if ( init_flag == UART_ERROR ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
canbus_default_cfg ( &canbus );
app_buf_len = 0;
app_buf_cnt = 0;
log_info( &logger, " Application Task " );
Delay_ms( 100 );
Delay_ms( 100 );
#ifdef TRANSMIT
log_printf( &logger, " Send data: \r\n" );
log_printf( &logger, " MikroE \r\n" );
log_printf( &logger, "------------------\r\n" );
log_printf( &logger, " Transmit data \r\n" );
Delay_ms( 1000 );
#endif
#ifdef RECIEVER
log_printf( &logger, " Receive data \r\n" );
Delay_ms( 2000 );
#endif
log_printf( &logger, "------------------\r\n" );
}

Application Task

Transmitter/Receiver task depends on uncommented code. Receiver logging each received byte to the UART for data logging, while transmitted send messages every 2 seconds.

void application_task ( void ) {
#ifdef TRANSMIT
log_printf( &logger, "\t%s", demo_message );
Delay_ms( 2000 );
log_printf( &logger, "------------------\r\n" );
#endif
#ifdef RECIEVER
canbus_process( );
if ( app_buf_len > 0 ) {
log_printf( &logger, "%s", app_buf );
canbus_clear_app_buf( );
}
#endif
}

Additional Function

  • canbus_clear_app_buf Function clears memory of app_buf.
    static void canbus_clear_app_buf ( void );
  • canbus_process The general process of collecting presponce that a module sends.
    static err_t canbus_process ( void );

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.CanBus

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.


canbus_t
CAN Bus Click context object.
Definition: canbus.h:101
canbus_default_cfg
err_t canbus_default_cfg(canbus_t *ctx)
CAN Bus default configuration function.
canbus_init
err_t canbus_init(canbus_t *ctx, canbus_cfg_t *cfg)
CAN Bus initialization function.
canbus_set_low_current_standby_mode
err_t canbus_set_low_current_standby_mode(canbus_t *ctx)
CAN Bus low current standby mode function.
canbus_set_high_speed_mode
err_t canbus_set_high_speed_mode(canbus_t *ctx)
CAN Bus high speed mode function.
canbus_cfg_t
CAN Bus Click configuration object.
Definition: canbus.h:122
application_task
void application_task(void)
Definition: main.c:125
canbus_cfg_setup
void canbus_cfg_setup(canbus_cfg_t *cfg)
CAN Bus configuration object setup function.
CANBUS_MAP_MIKROBUS
#define CANBUS_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: canbus.h:88
application_init
void application_init(void)
Definition: main.c:67
canbus_send_data
err_t canbus_send_data(canbus_t *ctx, char *tx_data)
CAN Bus send data function.
demo_message
unsigned char demo_message[9]
Definition: main.c:45