STC Dual Serial Port sending example

#include "Reg51.h"


#define FOSC 12000000L//Crystal oscillator 12M
#define BAUD 9600


#define NONE_PARITY 0//No check digit
#define ODD_PARITY 1//Odd check
#define Even_parity 2//even check
#define MARK_PARITY 3//Mark Check
#define SPACE_PARITY 4//null check


#define Paritybit Even_parity


#define S2RI 0x01
#define S2TI 0x02
#define S2RB8 0x04
#define S2TB8 0x08


SFR AUXR = 0x8e;
SFR s2con = 0x9a;
SFR s2buf = 0x9b;
SFR BRT = 0x9c;
SFR IE2 = 0xaf;


Bit busy;


void SendData (char dat);
void Sendstring (char *s);
unsigned char string[]={"Hello world!\r\n"};
void Main ()
{
#if (Paritybit = = none_parity)
S2con = 0x5a; 8-bit variable baud rate (no check bit)
#elif (Paritybit = = odd_parity) | | (Paritybit = = even_parity) | | (Paritybit = = mark_parity)
S2con = 0xDA; 9-bit variable baud rate, initial check digit is 1
#elif (Paritybit = = space_parity)
S2con = 0xd5; 9-bit variable baud rate, initial check digit is 0
#endif
---Serial 1 initialization------------------------------
scon=0x40; Set the serial port mode 1,ren=0;
pcon=0x80; Double the baud rate
tmod=0x20; Timer works on Mode 2
Th1=0xf3; Baud rate 4800
Tr1=1; Turn on Timer 1


---------------Serial 2 Initialization-------------
BRT =-(Fosc/32/baud); Setting the overloaded initial value of the independent baud rate generator
AUXR = 0x14; Independent baud rate generator works in 1T mode
IE2 = 0x01; Enable serial port 2 to interrupt
EA = 1; Open Total Interrupt


Sendstring ("Stc12c5a60s2\r\nuart2 Test!\r\n");Serial 2 Send




while (1)
{
unsigned char i=0;
while (String[i])//wait for the string to be sent out Serial 1 Send
{
Sbuf= string[i++]; Data loading buffers
while (ti==0); Waiting to be sent out
ti=0; Clear Send flag bit
}
}
while (1);
}


void Uart2 () Interrupt 8 using 1
{
if (S2con & S2ri)
{
S2con &= ~s2ri; Clear Receive Completion flag
P0 = S2buf; P0 Display serial data
P2 = (S2con & S2rb8); P2.2 Display Check digit
}
if (S2con & S2ti)
{
S2con &= ~s2ti; Clear Send Completion flag
busy = 0;
}
}


void SendData (char dat)
{
while (busy); Wait for the last data send to complete
ACC = dat; Get parity bit P
if (P) Set the check digit of serial port data according to P
{
#if (Paritybit = = odd_parity)
S2con &= ~s2tb8; Parity bit is 0
#elif (Paritybit = = even_parity)
S2con |= S2tb8; Parity bit is 1
#endif
}
Else
{
#if (Paritybit = = odd_parity)
S2con |= S2tb8; Parity bit is 1
#elif (Paritybit = = even_parity)
S2con &= ~s2tb8; Parity bit is 0
#endif
}
busy = 1;
S2buf = ACC; Send data
}


void Sendstring (char *s)
{
while (*s)//Judgment string End flag
{
SendData (*s++); Send character
}


}

STC Dual Serial Port sending example