User`s manual

UC-8410/8416/8418 LX User’s Manual Programmer’s Guide
5-11
Examples
Example 1
File Name: tdio.c
Description: The program indicates to connect DO1 to DI1, change the digital output state to high
or low by manual input, and then detect and count the state changed events from DI1.
#include <stdio.h>
#include <stdlib.h>
#include <moxadevice.h>
#include <fcntl.h>
#ifdef DEBUG
#define dbg_printf(x...) printf(x)
#else
#define dbg_printf(x...)
#endif
#define MIN_DURATION 40
static char *DataString[2]={“Low “, “High “};
static void hightolowevent(int diport)
{
printf(“\nDIN port %d high to low.\n”, diport);
}
static void lowtohighevent(int diport)
{
printf(“\nDIN port %d low to high.\n”, diport);
}
int main(int argc, char * argv[])
{
int i, j, state, retval;
unsigned long duration;
while( 1 ) {
printf(“\nSelect a number of menu, other key to exit. \n\
1. set high to low event \n\
2. get now data. \n\
3. set low to high event \n\
4. clear event \n\
5. set high data. \n\
6. set low data. \n\
7. quit \n\
8. show event and duration \n\
Choose : “);
retval =0;
scanf(“%d”, &i);
if ( i == 1 ) { // set high to low event
printf(“Please keyin the DIN number : “);
scanf(“%d”, &i);
printf(“Please input the DIN duration, this minimun value must be over %d : “,
MIN_DURATION);
scanf(“%lu”, &duration);
retval=set_din_event(i, hightolowevent, DIN_EVENT_HIGH_TO_LOW, duration);
} else if ( i == 2 ) { // get now data
printf(“DIN data : “);
for ( j=0; j<4; j++ ) {
get_din_state(j, &state);
printf(“%s”, DataString[state]);
}
printf(“\n”);
printf(“DOUT data : “);
for ( j=0; j<MAX_DOUT_PORT; j++ ) {
get_dout_state(j, &state);
printf(“%s”, DataString[state]);
}
printf(“\n”);
} else if ( i == 3 ) { // set low to high event
printf(“Please keyin the DIN number : “);
scanf(“%d”, &i);
printf(“Please input the DIN duration, this minimun value must be over %d :”,
MIN_DURATION);