STC micro STC8A8K64D4 Series - Page 332

STC8A8K64D4 Series Manual
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#include "reg51.h"
#include "intrins.h"
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xc9;
sfr P5M0 = 0xca;
sfr AUXR = 0x8e;
void INT1_Isr() interrupt 2
{
P0 = TL1; //TL1 is the low byte of the measured value
P1 = TH1; //TH1 is the high byte of the measured value
}
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;
AUXR = 0x40; //1T mode
TMOD = 0x80; //Enable GATE, and enable timing when INT1 is 1
TL1 = 0x00;
TH1 = 0x00;
while (INT1); //Wait for INT1 to be low
TR1 = 1; //Start timer
IT1 = 1; //Enable INT1 falling edge interrupt
EX1 = 1;
EA = 1;
while (1);
}
Assembly code
;Operating frequency for test is 11.0592MHz
AUXR DATA 8EH