Library Description

The library covers all the necessary functions to control GMR Angle click board. A library performs a standard SPI interface communication.

Key functions:

• uint16_t gmrangle_readData( uint8_t registerAddress ) - Generic read 16-bit data function.
• void gmrangle_writeData( uint8_t registerAddress, uint16_t writeData ) - Generic write 16-bit data function.
• float gmrangle_calculateAngle() - Calculate angle function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI, GPIO and LOG structures, sets AN and INT pins as input and RST, CS and PWM pins as output and start to write log.
• Application Initialization - Initialization driver enables - SPI, initializes, also write log.
• Application Task - (code snippet) This is an example which demonstrates the use of GMR Angle Click board. Display angle value in degrees. 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()
{
    angle = gmrangle_calculateAngle();

    FloatToStr( angle, logText );
    mikrobus_logWrite( " Angle is ", _LOG_TEXT );
    mikrobus_logWrite( logText, _LOG_TEXT );
    mikrobus_logWrite( degCel, _LOG_LINE );
    mikrobus_logWrite( "---------------------", _LOG_LINE );

    Delay_1sec();
}

Other mikroE Libraries used in the example:

• SPI
• UART
• Conversions

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.