Mikroelektronika MIKROE-442 데이터 시트

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

461

Soft_UART_Read

Soft_UART_Write

sub function Soft_UART_Read(dim byref error as byte) as byte

Description 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. 

  Values: 

- 

0

 - no error 

- 

1

 - stop bit error 

- 

255

 - user abort, Soft_UART_Break called 

Byte received via UART.

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

dim data_ as byte

    error as word

  data_ = Soft_UART_Read(error)

loop until (error = 0)

The Software UART library implements time-based activities, so interrupts need to be disabled when 

using it.

sub procedure Soft_UART_Write(dim udata as byte)

Description This routine sends one byte via the Software UART bus.
Parameters - 

udata

: data to be sent. 

Nothing.

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

Be  aware  that  during  transmission,  software  UART  is  incapable  of  receiving  data  –  data  transfer 

protocol must be set in such a way to prevent loss of information.

dim some_byte as byte

...

some_byte = $0A

Soft_UART_Write(some_byte)

The Software UART library implements time-based activities, so interrupts need to be disabled when 

using it.