Library Description

The library initializes and defines the UART bus driver and drivers that offer a choice for writing data on UART. The library includes function for read n data and functions for go to Command/Data mode. The user also has the function for reset chip and storage read data.

Key functions:

• void uart1wire_writeCommand(uint8_t input) - Functions for write one byte on UART.
• uint8_t uart1wire_readByte() - Functions for read byte from UART.
• void uart1wire_goToCommandMode() - Functions for go to command mode.
• void uart1wire_goToDataMode() - Functions for go to data mode.
• void uart1wire_readData(uint8_t *buf, uint8_t nData) - Functions for read data.

Examples description

The application is composed of the three sections :

• System Initialization - Initializes UART module.
• Application Initialization - Initializes Driver init, interrupt routine and init thermo 2 click.
• Application Task - (code snippet) - Reads the temperature from the Thermo 2 click board and logs data to UART. Connection between Thermo 2 and UART 1 Wire is made through 1- Wire interface. You can place thermo 2 click on mikrobus 2 socket and use side headers to make connection between click boards.

void applicationTask()
{
    /* Start converzion */
    uart1wire_reset();
    uart1wire_goToDataMode();
    Delay_10ms();
    uart1wire_writeCommand(_UART1WIRE_SKIP_ROM);
    uart1wire_writeCommand( 0x44 );
    Delay_ms( 750 );
    
    /* Start reading temperature */
    uart1wire_reset();
    uart1wire_goToDataMode();
    Delay_10ms();
    uart1wire_writeCommand(_UART1WIRE_SKIP_ROM);
    uart1wire_writeCommand( 0xBE );
    Delay_10ms();
    
    uart1wire_readData(&dataBuffer[0], 8);
    
    Temp = dataBuffer[ 1 ];
    Temp = Temp << 8;
    Temp = Temp | dataBuffer[ 0 ];
    
    fTemp = Temp * 0.0625;
    mikrobus_logWrite(" Temperature : ", _LOG_TEXT);
    FloatToStr(fTemp, demoText);
    mikrobus_logWrite(demoText, _LOG_LINE);
    
    Delay_ms( 1000 );
}

Other mikroE Libraries used in the example:

• UART
• Conversions

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 clickor 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.