?? clk.c
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/*
*********************************************************************************************************
* Clock/Calendar
*
* (c) Copyright 1999, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
* Filename : CLK.C
* Programmer : Jean J. Labrosse
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#define CLK_GLOBALS /* CLK.H is informed to allocate storage for globals */
#include "includes.h"
/*
*********************************************************************************************************
* LOCAL CONSTANTS
*********************************************************************************************************
*/
#define CLK_TS_BASE_YEAR 2000 /* Time stamps start year */
/*
*********************************************************************************************************
* LOCAL VARIABLES
*********************************************************************************************************
*/
static OS_EVENT *ClkSem; /* Semaphore used to access the time of day clock */
static OS_EVENT *ClkSemSec; /* Counting semaphore used to keep track of seconds */
static OS_STK ClkTaskStk[CLK_TASK_STK_SIZE];
static INT8U ClkTickCtr; /* Counter used to keep track of system clock ticks */
/*$PAGE*/
/*
*********************************************************************************************************
* LOCAL TABLES
*********************************************************************************************************
*/
#if CLK_DATE_EN
static char *ClkDOWTbl[] = { /* NAME FOR EACH DAY OF THE WEEK */
"Sunday ",
"Monday ",
"Tuesday ",
"Wednesday ",
"Thursday ",
"Friday ",
"Saturday "
};
static CLK_MONTH ClkMonthTbl[] = { /* MONTHS TABLE */
{0, "", 0}, /* Invalid month */
{31, "January ", 6}, /* January */
{28, "February ", 2}, /* February (note leap years are handled by code) */
{31, "March ", 2}, /* March */
{30, "April ", 5}, /* April */
{31, "May ", 0}, /* May */
{30, "June ", 3}, /* June */
{31, "July ", 5}, /* July */
{31, "August ", 1}, /* August */
{30, "September ", 4}, /* September */
{31, "October ", 6}, /* October */
{30, "November ", 2}, /* November */
{31, "December ", 4} /* December */
};
#endif
/*
*********************************************************************************************************
* LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/
void ClkTask(void *data);
static BOOLEAN ClkUpdateTime(void);
#if CLK_DATE_EN
static BOOLEAN ClkIsLeapYear(INT16U year);
static void ClkUpdateDate(void);
static void ClkUpdateDOW(void);
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* FORMAT CURRENT DATE INTO STRING
*
* Description : Formats the current date into an ASCII string.
* Arguments : n is the format type:
* 1 will format the time as "MM-DD-YY" (needs at least 9 characters)
* 2 will format the time as "Day Month DD, YYYY" (needs at least 30 characters)
* 3 will format the time as "YYYY-MM-DD" (needs at least 11 characters)
* s is a pointer to the destination string. The destination string must be large
* enough to hold the formatted date.
* contain
* Returns : None.
* Notes : - A 'switch' statement has been used to allow you to add your own date formats. For
* example, you could display the date in French, Spanish, German etc. by assigning
* numbers for those types of conversions.
* - This function assumes that strcpy(), strcat() and itoa() are reentrant.
*********************************************************************************************************
*/
#if CLK_DATE_EN
void ClkFormatDate (INT8U n, char *s)
{
INT8U err;
INT16U year;
char str[5];
OSSemPend(ClkSem, 0, &err); /* Gain exclusive access to time-of-day clock */
switch (n) {
case 1:
strcpy(s, "MM-DD-YY"); /* Create the template for the selected format */
s[0] = ClkMonth / 10 + '0'; /* Convert DATE to ASCII */
s[1] = ClkMonth % 10 + '0';
s[3] = ClkDay / 10 + '0';
s[4] = ClkDay % 10 + '0';
year = ClkYear % 100;
s[6] = year / 10 + '0';
s[7] = year % 10 + '0';
break;
case 2:
strcpy(s, ClkDOWTbl[ClkDOW]); /* Get the day of the week */
strcat(s, ClkMonthTbl[ClkMonth].MonthName); /* Get name of month */
if (ClkDay < 10) {
str[0] = ClkDay + '0';
str[1] = 0;
} else {
str[0] = ClkDay / 10 + '0';
str[1] = ClkDay % 10 + '0';
str[2] = 0;
}
strcat(s, str);
strcat(s, ", ");
itoa(ClkYear, str, 10);
strcat(s, str);
break;
case 3:
strcpy(s, "YYYY-MM-DD"); /* Create the template for the selected format */
s[0] = year / 1000 + '0';
year = year % 1000;
s[1] = year / 100 + '0';
year = year % 100;
s[2] = year / 10 + '0';
s[3] = year % 10 + '0';
s[5] = ClkMonth / 10 + '0'; /* Convert DATE to ASCII */
s[6] = ClkMonth % 10 + '0';
s[8] = ClkDay / 10 + '0';
s[9] = ClkDay % 10 + '0';
break;
default:
strcpy(s, "?");
break;
}
OSSemPost(ClkSem); /* Release access to clock */
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* FORMAT CURRENT TIME INTO STRING
*
* Description : Formats the current time into an ASCII string.
* Arguments : n is the format type:
* 1 will format the time as "HH:MM:SS" (24 Hour format)
* (needs at least 9 characters)
* 2 will format the time as "HH:MM:SS AM" (With AM/PM indication)
* (needs at least 13 characters)
* s is a pointer to the destination string. The destination string must be large
* enough to hold the formatted time.
* contain
* Returns : None.
* Notes : - A 'switch' statement has been used to allow you to add your own time formats.
* - This function assumes that strcpy() is reentrant.
*********************************************************************************************************
*/
void ClkFormatTime (INT8U n, char *s)
{
INT8U err;
INT8U hr;
OSSemPend(ClkSem, 0, &err); /* Gain exclusive access to time-of-day clock */
switch (n) {
case 1:
strcpy(s, "HH:MM:SS"); /* Create the template for the selected format */
s[0] = ClkHr / 10 + '0'; /* Convert TIME to ASCII */
s[1] = ClkHr % 10 + '0';
s[3] = ClkMin / 10 + '0';
s[4] = ClkMin % 10 + '0';
s[6] = ClkSec / 10 + '0';
s[7] = ClkSec % 10 + '0';
break;
case 2:
strcpy(s, "HH:MM:SS AM"); /* Create the template for the selected format */
s[9] = (ClkHr >= 12) ? 'P' : 'A'; /* Set AM or PM indicator */
if (ClkHr > 12) { /* Adjust time to be displayed */
hr = ClkHr - 12;
} else {
hr = ClkHr;
}
s[0] = hr / 10 + '0'; /* Convert TIME to ASCII */
s[1] = hr % 10 + '0';
s[3] = ClkMin / 10 + '0';
s[4] = ClkMin % 10 + '0';
s[6] = ClkSec / 10 + '0';
s[7] = ClkSec % 10 + '0';
break;
default:
strcpy(s, "?");
break;
}
OSSemPost(ClkSem); /* Release access to time-of-day clock */
}
/*$PAGE*/
/*
*********************************************************************************************************
* FORMAT TIME-STAMP
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