Library Description

The library covers all the necessary functions to control CAN SPI 3v3 click board.

Key functions:

• void canspi3v3_hwReset() - Hardware reset function.
• uint8_t canspi3v3_getInterrupt() - Get interrupt state function.

The application is composed of the three sections :

• System Initialization - Initializes GPIO, SPI, and LOG structures, sets INT pin as an input, CS and RST pin as output and start to write log.
• Application Initialization - Initialization driver enables - SPI, initialize external CANSPI module, also write log.
• Application Task - This is an example which demonstrates the use of CAN SPI 3v3 Click board. In this example, we show a simple connection of two CAN SPI 3v3 modules. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on usb uart changes for every 1 sec.

void applicationTask()
{
    char dataRxTx[ 8 ];
    uint8_t dataRxLen;
    uint8_t msgRcvd;
    uint8_t dataTx;
    uint32_t idRx;

    dataTx = 0xAB;

    msgRcvd = CANSPIRead( &idRx , &dataRxTx , &dataRxLen, &canRcvFlags );

    if ( msgRcvd )
    {
        mikrobus_logWrite( &dataRxTx, _LOG_BYTE );
        Delay_1sec();
    }

//    CANSPIWrite( id2nd, dataTx, 1, canSendFlags );
//    mikrobus_logWrite( "MESSAGE SENT", _LOG_LINE );
//    Delay_1sec();
}

Other mikroE Libraries used in the example:

• SPI
• CAN_SPI
• UART

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.