本文详细介绍了使用C语言实现日期处理和显示的功能，包括日期的基本操作、日期格式转换以及日期显示的用户交互过程。
EZ430 Chronos 自带程序源码：年月日期示范程序
date.c
// *************************************************************************************************
//
// Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
//
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// *************************************************************************************************
// Date functions.
// *************************************************************************************************
// *************************************************************************************************
// Include section
// system
#include "project.h"
// driver
#include "display.h"
#include "ports.h"
// logic
#include "date.h"
#include "user.h"
// *************************************************************************************************
// Prototypes section
void reset_date(void);
u8 get_numberOfDays(u8 month, u16 year);
void add_day(void);
void mx_date(u8 line);
void sx_date(u8 line);
void display_date(u8 line, u8 update);
// *************************************************************************************************
// Defines section
// *************************************************************************************************
// Global Variable section
struct date sDate;
// *************************************************************************************************
// Extern section
extern void (*fptr_lcd_function_line1)(u8 line, u8 update);
extern void (*fptr_lcd_function_line2)(u8 line, u8 update);
// *************************************************************************************************
// @fn reset_date
// @brief Reset date to start value.
// @param none
// @return none
// *************************************************************************************************
void reset_date(void)
{
// Set date
sDate.year = 2009;
sDate.month = 8;
sDate.day = 1;
// Show day and month on display
sDate.display = DISPLAY_DEFAULT_VIEW;
}
// *************************************************************************************************
// @fn get_NumberOfDays
// @brief Return number of days for a given month
// @param month month as char
// year year as int
// @return day count for given month
// *************************************************************************************************
u8 get_numberOfDays(u8 month, u16 year)
{
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: return (31);
case 4:
case 6:
case 9:
case 11: return (30);
// 1. A year that is divisible by 4 is a leap year. (Y % 4) == 0
// 2. Exception to rule 1: a year that is divisible by 100 is not a leap year. (Y % 100) != 0
// 3. Exception to rule 2: a year that is divisible by 400 is a leap year. (Y % 400) == 0
case 2: if ((year%4==0) && ((year%100!=0) || (year%400==0)))
return (29);
else
return (28);
default: return (0);
}
}
// *************************************************************************************************
// @fn add_day
// @brief Add one day to current date. Called when clock changes from 23:59 to 00:00
// @param none
// @return none
// *************************************************************************************************
void add_day(void)
{
// Add 1 day
sDate.day++;
// Check if day overflows into next month
if (sDate.day > get_numberOfDays(sDate.month, sDate.year))
{
// Add 1 month and reset to day to 1
sDate.day = 1;
sDate.month++;
// Check if month overflows into next year
if (sDate.month > 12)
{
// Add 1 year and reset month and day to 1
sDate.day = 1;
sDate.month = 1;
sDate.year++;
}
}
// Indicate to display function that new value is available
display.flag.full_update = 1;
}
// *************************************************************************************************
// @fn mx_date
// @brief Date set routine.
// @param line LINE1, LINE2
// @return none
// *************************************************************************************************
void mx_date(u8 line)
{
u8 select;
s32 day;
s32 month;
s32 year;
s16 max_days;
u8 * str;
u8 * str1;
// Clear display
clear_display_all();
// Convert global to local variables
day = sDate.day;
month = sDate.month;
year = sDate.year;
// Init value index
select = 0;
// Init display
// LINE1: DD.MM (metric units) or MM.DD (English units)
// LINE2: YYYY (will be drawn by set_value)
if (sys.flag.use_metric_units)
{
str = itoa(day, 2, 0);
display_chars(LCD_SEG_L1_3_2, str, SEG_ON);
str1 = itoa(month, 2, 0);
display_chars(LCD_SEG_L1_1_0, str1, SEG_ON);
}
else // English units
{
str = itoa(day, 2, 0);
display_chars(LCD_SEG_L1_1_0, str, SEG_ON);
str1 = itoa(month, 2, 0);
display_chars(LCD_SEG_L1_3_2, str1, SEG_ON);
}
display_symbol(LCD_SEG_L1_DP1, SEG_ON);
// Loop values until all are set or user breaks set
while(1)
{
// Idle timeout: exit without saving
if (sys.flag.idle_timeout) break;
// Button STAR (short): save, then exit
if (button.flag.star)
{
// Copy local variables to global variables
sDate.day = day;
sDate.month = month;
sDate.year = year;
// Full display update is done when returning from function
break;
}
switch (select)
{
case 0: // Set year
set_value(&year, 4, 0, 2008, 2100, SETVALUE_DISPLAY_VALUE + SETVALUE_NEXT_VALUE, LCD_SEG_L2_3_0, display_value1);
select = 1;
break;
case 1: // Set month
if (sys.flag.use_metric_units)
{
set_value(&month, 2, 0, 1, 12, SETVALUE_ROLLOVER_VALUE + SETVALUE_DISPLAY_VALUE + SETVALUE_NEXT_VALUE, LCD_SEG_L1_1_0, display_value1);
}
else // English units
{
set_value(&month, 2, 0, 1, 12, SETVALUE_ROLLOVER_VALUE + SETVALUE_DISPLAY_VALUE + SETVALUE_NEXT_VALUE, LCD_SEG_L1_3_2, display_value1);
}
select = 2;
break;
case 2: // Set day
if (sys.flag.use_metric_units)
{
set_value(&day, 2, 0, 1, max_days, SETVALUE_ROLLOVER_VALUE + SETVALUE_DISPLAY_VALUE + SETVALUE_NEXT_VALUE, LCD_SEG_L1_3_2, display_value1);
}
else // English units
{
set_value(&day, 2, 0, 1, max_days, SETVALUE_ROLLOVER_VALUE + SETVALUE_DISPLAY_VALUE + SETVALUE_NEXT_VALUE, LCD_SEG_L1_1_0, display_value1);
}
select = 0;
break;
}
// Check if day is still valid, if not clamp to last day of current month
max_days = get_numberOfDays(month, year);
if (day > max_days) day = max_days;
}
// Clear button flag
button.all_flags = 0;
}
// *************************************************************************************************
// @fn sx_date
// @brief Date user routine. Toggles view between DD.MM and YYYY.
// @param line LINE1, LINE2
// @return none
// *************************************************************************************************
void sx_date(u8 line)
{
// Toggle display items
if (sDate.display == DISPLAY_DEFAULT_VIEW) sDate.display = DISPLAY_ALTERNATIVE_VIEW;
else sDate.display = DISPLAY_DEFAULT_VIEW;
}
// *************************************************************************************************
// @fn display_date
// @brief Display date in DD.MM format (metric units) or MM.DD (English units).
// @param u8 line LINE1, LINE2
// u8 update DISPLAY_LINE_UPDATE_FULL, DISPLAY_LINE_UPDATE_PARTIAL
// @return none
// *************************************************************************************************
void display_date(u8 line, u8 update)
{
u8 * str;
if (update == DISPLAY_LINE_UPDATE_FULL)
{
if (sDate.display == DISPLAY_DEFAULT_VIEW)
{
// Convert day to string
str = itoa(sDate.day, 2, 0);
if (sys.flag.use_metric_units)
{
display_chars(switch_seg(line, LCD_SEG_L1_3_2, LCD_SEG_L2_3_2), str, SEG_ON);
}
else
{
display_chars(switch_seg(line, LCD_SEG_L1_1_0, LCD_SEG_L2_1_0), str, SEG_ON);
}
// Convert month to string
str = itoa(sDate.month, 2, 0);
if (sys.flag.use_metric_units)
{
display_chars(switch_seg(line, LCD_SEG_L1_1_0, LCD_SEG_L2_1_0), str, SEG_ON);
}
else
{
display_chars(switch_seg(line, LCD_SEG_L1_3_2, LCD_SEG_L2_3_2), str, SEG_ON);
}
// Display "." to separate day and month
display_symbol(switch_seg(line, LCD_SEG_L1_DP1, LCD_SEG_L2_DP), SEG_ON);
}
else
{
// Convert year to string
str = itoa(sDate.year, 4, 0);
display_chars(switch_seg(line, LCD_SEG_L1_3_0, LCD_SEG_L2_3_0), str, SEG_ON);
// Clear "."
display_symbol(switch_seg(line, LCD_SEG_L1_DP1, LCD_SEG_L2_DP), SEG_OFF);
}
}
else if (update == DISPLAY_LINE_CLEAR)
{
// Show day and month on display when coming around next time
sDate.display = DISPLAY_DEFAULT_VIEW;
}
}
date.h
// *************************************************************************************************
//
// Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
//
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// *************************************************************************************************
#ifndef DATE_H_
#define DATE_H_
// *************************************************************************************************
// Include section
// *************************************************************************************************
// Prototypes section
extern void reset_date(void);
extern void add_day(void);
extern void mx_date(u8 line);
extern void sx_date(u8 line);
extern void display_date(u8 line, u8 update);
// *************************************************************************************************
// Defines section
// *************************************************************************************************
// Global Variable section
struct date
{
u8 display;
u8 day;
u8 month;
u16 year;
};
extern struct date sDate;
// *************************************************************************************************
// Extern section
#endif /*DATE_H_*/
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
