Example Routines; Usart1 Switch - STC micro STC8A8K64D4 Series Reference Manual

STC8A8K64D4 Series Manual

3.2 Example Routines

3.2.1 USART1 switch

C language code
// Operating frequency for test is 11.0592MHz
#include "reg51.h"
sfr P_SW1
sfr P0M1
sfr P0M0
sfr P1M1
sfr P1M0
sfr P2M1
sfr P2M0
sfr P3M1
sfr P3M0
sfr P4M1
sfr P4M0
sfr P5M1
sfr P5M0
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P_SW1 = 0x00;
// P_SW1 = 0x40;
// P_SW1 = 0x80;
// P_SW1 = 0xc0;
while (1);
}
Assembly code
; Operating frequency for test is 11.0592MHz
P_SW1 DATA
P0M1 DATA
P0M0 DATA
P1M1 DATA
P1M0 DATA
P2M1 DATA
P2M0 DATA
P3M1 DATA
= 0xa2;
= 0x93;
= 0x94;
= 0x91;
= 0x92;
= 0x95;
= 0x96;
= 0xb1;
= 0xb2;
= 0xb3;
= 0xb4;
= 0xc9;
= 0xca;
0A2H
093H
094H
091H
092H
095H
096H
0B1H
//RXD/P3.0, TXD/P3.1
//RXD_2/P3.6, TXD_2/P3.7
//RXD_3/P1.6, TXD_3/P1.7
//RXD_4/P4.3, TXD_4/P4.4
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