liblpfk: test/lpfkbinclock.c@bfaaf539bc4d (annotated)

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test/lpfkbinclock.c@bfaaf539bc4d (annotated)

test/lpfkbinclock.c

Thu, 25 Sep 2008 15:29:35 +0100

author: Philip Pemberton <philpem@philpem.me.uk>
date: Thu, 25 Sep 2008 15:29:35 +0100
changeset 11: bfaaf539bc4d
permissions: -rw-r--r--

Added lpfkbinclock test program (from Ethan Dicks, ethan.dicks usap.gov)

 /*
  * binclock.c - simple binary clock using an IBM LPFK as a display device
  *
  * Written by Ethan Dicks <ethan.dicks@gmail.com>
  *
  * Revision History
  *
  * 27-Aug-2008	0.1	Ethan Dicks	Initial version
  * 27 Aug-2008	0.2	Ethan Dicks	Corrected serial init bits (thanks to
  *					Phil Pemberton!) and proper logic tests
  * 08-Sep-2008	0.3	Ethan Dicks	Converted to work with Phil Pemberton's
  *					lpfklib.
  *
  *
  *
  */
 #include <stdio.h>
 #include <stdbool.h>
 #include <time.h>
 #include "liblpfk.h"
 //#define TEST
 int main(int argc, char **argv)
 {
 	LPFK_CTX	ctx;
 	int		i;
 	/* Bits for masking off digits of time */
 	int bcdmask[] = { 0x01, 0x02, 0x04, 0x08 };
 	// strftime stuff
         static const char *timeFormat = "%H%M%S";
         time_t thetime;
         struct tm *rtime;
         char timestr[40];
 	/* vars for converting ASCII time to individual bits */
 	int timedigit, timebit;
 	int maploc;
 	/* Import our serial port name */
 	if (argc < 2) {
 		printf("Syntax: %s commport\n", argv[0]);
 		return -1;
 	}
 	/* Open the LPFK library and retain the handle in ctx */
 #ifndef TEST
 	if ((i = lpfk_open(&ctx, argv[1])) != LPFK_E_OK) {
 		switch(i) {
 			case LPFK_E_PORT_OPEN:
 				printf("Error opening comm port.\n");
 				break;
 			case LPFK_E_NOT_PRESENT:
 				printf("LPFK not connected to specified port.\n");
 				break;
 			case LPFK_E_COMMS:
 				printf("LPFK communications error.\n");
 				break;
 		}
 		return -2;
 	}
 #endif /* TEST */
 	/* Turn LEDs off, just in case they were left on by the last application */
 #ifndef TEST
 	lpfk_set_leds(&ctx, false);
 #endif /* TEST */
 	//
 	// loop forever while collecting, reformatting and sending the time
 	//
 	while(1) {
 		/* get time */
 		time(&thetime);
 		rtime = localtime(&thetime);
 		/* reformat time from raw time to BCD HHMMSS to make it easy to parse next */
 	        if (strftime(timestr, sizeof(timestr), timeFormat, rtime) == 0)
         		*timestr = '\0';
 #ifdef TEST
 		printf("The time is '%s'\n", timestr);
 #endif /* TEST */
 		/* start with seconds and work backwards */
 		for (timedigit = 5; timedigit > -1; timedigit--) {
 			/* count bits from 0001 to 1000 forwards */
 			for (timebit = 0; timebit < 4; timebit++) {
 				// ugly!
 				maploc = 5 + 6 * (3 - timebit) + timedigit - 1;
 #ifndef TEST
 				lpfk_set_led_cached(&ctx, maploc, timestr[timedigit] & bcdmask[timebit]);
 #endif /* TEST */
 #ifdef TEST
 				printf("Turning LED %d to %d\n", maploc, timestr[timedigit] & bcdmask[timebit]);
 #endif /* TEST */
 			}
 		}
 		/* Update all the LEDs at once */
 #ifndef TEST
 		lpfk_update_leds(&ctx);
 #endif /* TEST */
 		/*  no need to do this hundreds of times per second */
 		sleep(1);  // make it 1 sec for now; screw with nanosleep() later
 	}
 }
 #if 0
 	/* Future cleanup code to be called by a SIGHUP trap */
 	/* Turn LEDs off and close the port */
 	lpfk_set_leds(&ctx, false);
 	lpfk_close(&ctx);
 #endif

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test/lpfkbinclock.c@bfaaf539bc4d (annotated)

test/lpfkbinclock.c