Programming Examples For Epa Channels; Epa Compare Event Program - Intel 8XC196K Series User Manual

Table of Contents

10.9 PROGRAMMING EXAMPLES FOR EPA CHANNELS

The three programming examples provided in this section demonstrate the use of the EPA channel

for a compare event, for a capture event, and for generation of a PWM signal. The programs dem-

onstrate the detection of events by a polling scheme, by interrupts, and by the PTS. All three ex-

amples were created using ApBUILDER, an interactive application program available through

Intel Literature Fulfillment or the Intel Applications Bulletin Board system (BBS). See Chapter

1, "Guide to This Manual," for information about ordering information from Intel Literature and

downloading files from the BBS. These sample program were written in the C programming lan-

guage. ASM versions are also available from ApBUILDER.

The initialization file (80c196kr.h) used in these examples is available from

the Intel Applications BBS.

This example C program demonstrates an EPA compare event. It sets up EPA channel 0 to toggle

its output pin whenever timer 1 is zero. This program uses no interrupts; a polling scheme detects

the EPA event. The program initializes EPA channel 0 for a compare event.

#pragma model(KR)

#include <80c196kr.h>

EPA0_INT_BIT

void init_epa0()

epa0_con = COMPARE |

epa0_time = 0;

setbit(p1_reg, 0); /*

clrbit(p1_dir, 0); /*

setbit(p1_mode, 0);/*

void init_timer1()

t1control = COUNT_ENABLE |

CLOCK_INTERNAL |

DIVIDE_BY_1;

make output pin

select EPA mode

EVENT PROCESSOR ARRAY (EPA)