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Author: MikroElektronika Team
Last Updated: 2019-05-17
Category: Communication
Downloaded: 677 times
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TouchKey 2 click has four capacitive pads powered by ATtiny817 which has an integrated touch QTouch® controller. The click is designed to run on a 3.3V power supply. The four LEDs onboard the click indicate the Key (Pad) is pressed. TouchKey 2 click communicates with the target microcontroller over UART and SPI interface.
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Library Description
Defines and initializes driver's UART bus. Declares and defines driver's functions for sending and receiving data bytes, also for checking if data byte ready for reading. It also offers set, clear reset pin and target reset functions.
Key functions:
uint8_t touchkey2_readByte() - Read received byte.uint8_t touchkey2_byteReady() - Checks is there a new byte received.void touchkey2_targetReset() - Function is used to reset the device.Examples description
The application is composed of the three sections :
void applicationTask( )
{
char tmp;
uint8_t rdyFlag;
rdyFlag = touchkey2_byteReady();
if (1 == rdyFlag)
{
tmp = touchkey2_readByte();
if( tmp == 0x00 )
{
mikrobus_logWrite( " Key released ", _LOG_LINE );
mikrobus_logWrite( "-------------------", _LOG_LINE );
}
else if( tmp == 0x01 )
{
mikrobus_logWrite( " Key A pressed", _LOG_LINE );
mikrobus_logWrite( "-------------------", _LOG_LINE );
}
else if( tmp == 0x02 )
{
mikrobus_logWrite( " Key B pressed", _LOG_LINE );
mikrobus_logWrite( "-------------------", _LOG_LINE );
}
else if( tmp == 0x04 )
{
mikrobus_logWrite( " Key C pressed", _LOG_LINE );
mikrobus_logWrite( "-------------------", _LOG_LINE );
}
else if( tmp == 0x08 )
{
mikrobus_logWrite( " Key D pressed", _LOG_LINE );
mikrobus_logWrite( "-------------------", _LOG_LINE );
}
else
{
mikrobus_logWrite( " Error!!! ", _LOG_LINE );
touchkey2_targetReset();
}
Other mikroE Libraries used in the example:
UARTAdditional 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.