Mikroelektronika MIKROE-742 데이터 시트

479

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

procedure UARTx_Init_Advanced(baud_rate : dword; parity : byte;
byte);

Nothing.

Configures and initializes UART module.

Parameter baud_rate configures UART module to work on a requested baud rate. 
Parameters parity and stop_bits determine the work mode for UART, and can
have the following values:

Note: Some MCUs do not support advanced configuration of the UART module.
Please consult appropriate daatsheet.

MCU must have UART module.

// Initialize hardware UART1 module and establish communication

at 9600 bps, 8-bit data, even parity and 2 STOP bits 

UART1_Init_Advanced(9600, _UART_EVENPARITY, _UART_TWO_STOPBITS);

0x00

Parity mode disabled

_UART_NOPARITY

0x20

Even parity

_UART_EVENPARITY

0x30

Odd parity

_UART_ODDPARITY

0x00

1 stop bit

_UART_ONE_STOPBIT

0x01

2 stop bits

_UART_TWO_STOPBITS

function UARTx_Data_Ready(): byte;

Function returns 1 if data is ready or 0 if there is no data. 

The function tests if data in receive buffer is ready for reading.

MCU with the UART module.

The UART module must be initialized before using this routine. See the
UARTx_Init routine.

var receive: byte;
...
// read data if ready
if (UART1_Data_Ready() = 1) then

receive := UART1_Read();