asynchronous data transmission.

abdulhameed6 · ‎2006-05-02

Posted on May 02, 2006 at 13:04

abdulhameed6 · ‎2006-05-01

Posted on May 02, 2006 at 05:00

dear

i am using keil uvision 2 version 4 for st10f269 while programming in c.

what settings are needed for asynchrous data transmission for

1 start bit

one even parity bit

9600 buad rate

one stop bit.

Hello

najoua · ‎2006-05-02

Posted on May 02, 2006 at 13:04

Hello,

The routine below defines the asked settings needed for asynchrous data transmission:

void ASC_Initialize ( void)

{

/* Select 8-bit asynchronous communication; one even parity, one stop bit, no errors checking, receiver enable */

S0CON = 0x0011;

/* Baudrate 9600, FCPU = 40 MHZ, SOBRS = 0 -> S0BG = 0x0081 */

S0BG = 0x0081;

/*Tx0 : P3.10 -> output direction , Rx0: P3.11 -> Input direction */

DP311 = 0;

_nop_();

DP310 = 1;

_nop_();

P310 = 1;

/* Set the S0R to enbale the ASC0 interface */

S0CON |= 0x8000;

/* Set the S0TBIR to trigger the transmission */

S0TBIR = 1;

}

Hope this helps you.

Najoua.

[ This message was edited by: Najoua on 02-05-2006 16:37 ]