Mikroelektronika MIKROE-742 데이터 시트

366

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

function Soft_UART_Read(var error: byte): byte;

Byte received via UART.

The function receives a byte via software UART.

This is a blocking function call (waits for start bit). Programmer can unblock it by
calling Soft_UART_Break routine.

Parameters : 

- 

error

: Error flag. Error code is returned through this variable. 

0

- no error 

1

- stop bit error 

255

- user abort, Soft_UART_Break called 

Software UART must be initialized before using this function. See the
Soft_UART_Init routine.

var data  : byte;

error : byte;

...
// wait until data is received
repeat

data := Soft_UART_Read(error);

until (error=0);

// Now we can work with data:
if ( data ) then
begin
...
end