Example Routines; Using Comparator (Interrupt Mode) - STC micro STC8A8K64D4 Series Reference Manual

STC8A8K64D4 Series Manual

15.4 Example Routines

15.4.1 Using Comparator (Interrupt Mode)

C language code
// Operating frequency for test is 11.0592MHz
#include "reg51.h"
#include "intrins.h"
#define CMPEXCFG
sfr P_SW2 =
sfr CMPCR1 =
sfr CMPCR2 =
sfr P1M1 =
sfr P1M0 =
sfr P0M1 =
sfr P0M0 =
sfr P2M1 =
sfr P2M0 =
sfr P3M1 =
sfr P3M0 =
sfr P4M1 =
sfr P4M0 =
sfr P5M1 =
sfr P5M0 =
sbit P10 =
sbit P11 =
void CMP_Isr() interrupt 21
{
CMPCR1 &= ~0x40;
if (CMPCR1 & 0x01)
{
P10 = !P10;
}
else
{
P11 = !P11;
}
}
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
(*(unsigned char volatile xdata *)0xfeae)
0xba;
0xe6;
0xe7;
0x91;
0x92;
0x93;
0x94;
0x95;
0x96;
0xb1;
0xb2;
0xb3;
0xb4;
0xc9;
0xca;
P1^0;
P1^1;
// Clear interrupt flag
// Rising edge interrupt test port
// Falling edge interrupt test port
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