Library Description

Initializes and defines UART bus driver, and defines driver's functions for communication (reading and writing) between MCP2542 clicks.

Key functions:

• void mcp2542_writeByte(uint8_t input) - Write Single Byte.
• uint8_t mcp2542_readByte() - Read Single Byte.
• uint8_t mcp2542_byteReady() - Check for new byte received.

Examples Description

The application is composed of three sections:

• System Initialization -  Initializes the UART module.
• Application Initialization - Driver intialization.
• Application Task - (code snippet) - Checks if new data byte has been received in the RX buffer (ready for reading), and if ready than reads one byte from the RX buffer. Otherwise, the aplication task writes message data via UART.

void applicationTask()
{
 char tmp;
 uint8_t rdyFlag;

// RECEIVER - UART polling 

 rdyFlag = mcp2542_byteReady();

 if (1 == rdyFlag)
 {
 tmp = mcp2542_readByte();
 mikrobus_logWrite( &tmp, _LOG_BYTE );
 }

// TRANSMITER - TX each 2 sec
/*
 for (tmp = 0; tmp < 9; tmp++)
 {
 mcp2542_writeByte( MESSAGE_DATA[tmp] );
 mikrobus_logWrite( "MESSAGE SENT", _LOG_LINE );
 }
 Delay_ms(2000);
*/
}

Other mikroE Libraries used in the example:

• UART

Additional notes and information

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.