integer= recv (text_interface);
Receive a single data word from the specified interface.
The interfaces is specified in text form – “UART1”, “SPI2”, etc.
Specifically for the I2C case, the interface also includes an optional action, immediately following the interface identifier.
Actions can be
“:S” - The transmission is preceded by an I2C start condition.
“:P” - The transmission is followed by an I2C stop condition.
“:R” - The transmission is preceded by an I2C repeated start condition.
var byte key = recv(“UART1”);