//編譯環(huán)境 AVR Studio 4.17/AVR GCC
//系統(tǒng)時(shí)鐘7.3728MHZ，設(shè)置熔絲位為外部高頻石英晶體振蕩，啟動(dòng)時(shí)間4.1ms
//作者：張奇[email protected]
//日期：2010.02.20

//***********************************************************************
//包含文件
//***********************************************************************

#include
#include
#define F_CPU7372800/* 單片機(jī)主頻為7.3728MHz,用于延時(shí)子程序 */
#include
#include <avr/io.h>
#include
//***********************************************************************
//定義變量區(qū)
//***********************************************************************
#define uchar unsigned char
#define uint unsigned int

#define delay_us(x) _delay_us(x) //AVR GCC延時(shí)函數(shù) x(us)
#define delay_ms(x) _delay_ms(x) //AVR GCC延時(shí)函數(shù) x(ms)
/*復(fù)位腳*/
#define RST_CLRPORTE &= ~(1 << PE7) //電平置低
#define RST_SETPORTE |= (1 << PE7) //電平置高
#define RST_INDDRE &= ~(1 << PE7) //方向輸入
#define RST_OUTDDRE |= (1 << PE7) //方向輸出

/*雙向數(shù)據(jù)*/
#define IO_CLRPORTE &= ~(1 << PE6) //電平置低
#define IO_SETPORTE |= (1 << PE6) //電平置高
#define IO_RPINE & (1 << PE6) //電平讀取
#define IO_INDDRE &= ~(1 << PE6) //方向輸入
#define IO_OUTDDRE |= (1 << PE6) //方向輸出

/*時(shí)鐘信號(hào)*/
#define SCK_CLRPORTE &= ~(1 << PE5) //時(shí)鐘信號(hào)
#define SCK_SETPORTE |= (1 << PE5) //電平置高
#define SCK_INDDRE &= ~(1 << PE5) //方向輸入
#define SCK_OUTDDRE |= (1 << PE5) //方向輸出

/*ds1302命令與相關(guān)地址*/
#define ds1302_sec_add0x80//秒數(shù)據(jù)地址
#define ds1302_min_add0x82//分?jǐn)?shù)據(jù)地址
#define ds1302_hr_add0x84//時(shí)數(shù)據(jù)地址
#define ds1302_date_add0x86//日數(shù)據(jù)地址
#define ds1302_month_add0x88//月數(shù)據(jù)地址
#define ds1302_day_add0x8a//星期數(shù)據(jù)地址
#define ds1302_year_add0x8c//年數(shù)據(jù)地址
#define ds1302_control_add0x8e//控制數(shù)據(jù)地址
#define ds1302_charger_add0x90
#define ds1302_clkburst_add0xbe

#define RS_CLRPORTF &= ~(1 << PF1) //RS置低
#define RS_SETPORTF |= (1 << PF1) //RS置高

#define RW_CLRPORTF &= ~(1 << PF2) //RW置低
#define RW_SETPORTF |= (1 << PF2) //RW置高

#define EN_CLRPORTF &= ~(1 << PF3) //E置低
#define EN_SETPORTF |= (1 << PF3) //E置高

#define Data_IO PORTA //液晶數(shù)據(jù)口
#define Data_DDR DDRA //數(shù)據(jù)口方向寄存器
#define D_LE0 PORTD &= ~(1 << PD4) //數(shù)碼管段控制位為0，鎖存端口數(shù)據(jù)
#define D_LE1 PORTD |= (1 << PD4) //數(shù)碼管段控制位為1，鎖存器輸出與端口一致
#define W_LE0 PORTD &= ~(1 << PD5) //數(shù)碼管位控制位為0
#define W_LE1 PORTD |= (1 << PD5) //數(shù)碼管位控制位為1

unsigned char time_buf[8] = {0x20,0x10,0x01,0x14,0x09,0x55,0x00,0x02};

//*************************************************************************
//初始化子程序
//*************************************************************************
void system_init()
{

Data_IO = 0xFF; //電平設(shè)置
Data_DDR = 0xFF; //方向輸出
PORTF = 0xFF; //電平設(shè)置
DDRF = 0xFF; //方向輸出
PORTD=0xFF;
DDRD=0xFF;
D_LE1; //關(guān)掉數(shù)碼管，以免顯示亂碼
W_LE1;
Data_IO=0xFF; //關(guān)數(shù)碼管
W_LE0;
}

//***********************************************************************
//向DS1302寫入一字節(jié)數(shù)據(jù)
//***********************************************************************
void ds1302_write_byte(unsigned char addr, unsigned char d)
{

unsigned char i;
RST_SET;//啟動(dòng)DS1302總線

//寫入目標(biāo)地址：addr
IO_OUT;
addr = addr & 0xFE; //最低位置零
for (i = 0; i < 8; i ++) {
if (addr & 0x01) {
IO_SET;
}
else {
IO_CLR;
}
SCK_SET;
SCK_CLR;
addr = addr >> 1;
}

//寫入數(shù)據(jù)：d
IO_OUT;
for (i = 0; i < 8; i ++) {
if (d & 0x01) {
IO_SET;
}
else {
IO_CLR;
}
SCK_SET;
SCK_CLR;
d = d >> 1;
}
RST_CLR;//停止DS1302總線
}
//***********************************************************************
// 從DS1302讀出一字節(jié)數(shù)據(jù)
//***********************************************************************
unsigned char ds1302_read_byte(unsigned char addr)
{

unsigned char i;
unsigned char temp;
RST_SET;//啟動(dòng)DS1302總線

//寫入目標(biāo)地址：addr
IO_OUT;
addr = addr | 0x01; //最低位置高
for (i = 0; i < 8; i ++) {
if (addr & 0x01) {
IO_SET;
}
else {
IO_CLR;
}
SCK_SET;
SCK_CLR;
addr = addr >> 1;
}

/*輸出數(shù)據(jù)：temp*/
IO_IN;
for (i = 0; i < 8; i ++) {
temp = temp >> 1;
if (IO_R) {
temp |= 0x80;
}
else {
temp &= 0x7F;
}
SCK_SET;
SCK_CLR;
}

RST_CLR;//停止DS1302總線
return temp;
}

//***********************************************************************
// 向DS302寫入時(shí)鐘數(shù)據(jù)
//***********************************************************************

void ds1302_write_time(void)
{

ds1302_write_byte(ds1302_control_add,0x00);//關(guān)閉寫保護(hù)
ds1302_write_byte(ds1302_sec_add,0x80);//暫停
//ds1302_write_byte(ds1302_charger_add,0xa9);//涓流充電
ds1302_write_byte(ds1302_year_add,time_buf[1]);//年
ds1302_write_byte(ds1302_month_add,time_buf[2]);//月
ds1302_write_byte(ds1302_date_add,time_buf[3]);//日
ds1302_write_byte(ds1302_day_add,time_buf[7]);//周
ds1302_write_byte(ds1302_hr_add,time_buf[4]);//時(shí)
ds1302_write_byte(ds1302_min_add,time_buf[5]);//分
ds1302_write_byte(ds1302_sec_add,time_buf[6]);//秒
ds1302_write_byte(ds1302_day_add,time_buf[7]);//周
ds1302_write_byte(ds1302_control_add,0x80);//打開寫保護(hù)
}

//***********************************************************************
// 從DS302讀出時(shí)鐘數(shù)據(jù)
//***********************************************************************

void ds1302_read_time(void)
{

time_buf[1]=ds1302_read_byte(ds1302_year_add);//年
time_buf[2]=ds1302_read_byte(ds1302_month_add);//月
time_buf[3]=ds1302_read_byte(ds1302_date_add);//日
time_buf[4]=ds1302_read_byte(ds1302_hr_add);//時(shí)
time_buf[5]=ds1302_read_byte(ds1302_min_add);//分
time_buf[6]=(ds1302_read_byte(ds1302_sec_add))&0x7F;//秒
time_buf[7]=ds1302_read_byte(ds1302_day_add);//周
}

//***********************************************************************
// DS302初始化函數(shù)
//***********************************************************************

void ds1302_init(void)
{

RST_CLR;//RST腳置低
SCK_CLR;//SCK腳置低
RST_OUT;//RST腳設(shè)置為輸出
SCK_OUT;//SCK腳設(shè)置為輸出
}

//***********************************************************************
//顯示屏命令寫入函數(shù)
//***********************************************************************

void LCD_write_com(unsigned char com)
{
RS_CLR;
RW_CLR;
EN_SET;
Data_IO = com;
delay_ms(5);
EN_CLR;
}
//***********************************************************************
//顯示屏數(shù)據(jù)寫入函數(shù)
//***********************************************************************

void LCD_write_data(unsigned char data)
{
RS_SET;
RW_CLR;
EN_SET;
Data_IO = data;
delay_ms(5);
EN_CLR;
}
//***********************************************************************
//顯示屏清空顯示
//***********************************************************************

void LCD_clear(void)
{
LCD_write_com(0x01);
delay_ms(5);
}
//***********************************************************************
//顯示屏字符串寫入函數(shù)
//***********************************************************************

void LCD_write_str(unsigned char x,unsigned char y,unsigned char *s)
{

if (y == 0)
{
LCD_write_com(0x80 + x);
}
else
{
LCD_write_com(0xC0 + x);
}

while (*s)
{
LCD_write_data( *s);
s ++;
}
}
//***********************************************************************
//顯示屏單字符寫入函數(shù)
//***********************************************************************

void LCD_write_char(unsigned char x,unsigned char y,unsigned char data)
{

if (y == 0)
{
LCD_write_com(0x80 + x);
}
else
{
LCD_write_com(0xC0 + x);
}

LCD_write_data( data);
}
//***********************************************************************
//顯示屏初始化函數(shù)
//***********************************************************************

void LCD_init(void)
{
system_init();
LCD_write_com(0x38);//顯示模式設(shè)置
delay_ms(5);
LCD_write_com(0x08);//顯示關(guān)閉
delay_ms(5);
LCD_write_com(0x01);//顯示清屏
delay_ms(5);
LCD_write_com(0x06);//顯示光標(biāo)移動(dòng)設(shè)置
delay_ms(5);
LCD_write_com(0x0C);//顯示開及光標(biāo)設(shè)置
delay_ms(5);
}

//***********************************************************************
//主函數(shù)
//***********************************************************************

void main(void)

{

unsigned char temp;
delay_ms(200);
LCD_init(); //1602液晶初始化
ds1302_init(); //DS1302初始化
delay_ms(10);
ds1302_write_time(); //向DS1302寫初始數(shù)據(jù)，如年月和時(shí)間等

while (1)
{
delay_ms(200);
ds1302_read_time(); //讀DS1302數(shù)據(jù)

temp = (time_buf[0] >> 4) + 0; //在LCD上寫要顯示的數(shù)據(jù)
LCD_write_char(0, 0, temp);/*年*/
temp = (time_buf[0] & 0x0F) + 0;
LCD_write_char(1, 0, temp);
temp = (time_buf[1] >> 4) + 0;
LCD_write_char(2, 0, temp);
temp = (time_buf[1] & 0x0F) + 0;
LCD_write_char(3, 0, temp);
LCD_write_char(4, 0, -);

temp = (time_buf[2] >> 4) + 0;
LCD_write_char(5, 0, temp);/*月*/
temp = (time_buf[2] & 0x0F) + 0;
LCD_write_char(6, 0, temp);
LCD_write_char(7, 0, -);

temp = (time_buf[3] >> 4) + 0;
LCD_write_char(8, 0, temp);/*日*/
temp = (time_buf[3] & 0x0F) + 0;
LCD_write_char(9, 0, temp);

temp = (time_buf[4] >> 4) + 0;
LCD_write_char(8, 1, temp);/*時(shí)*/
temp = (time_buf[4] & 0x0F) + 0;
LCD_write_char(9, 1, temp);
LCD_write_char(10, 1, :);

temp = (time_buf[5] >> 4) + 0;
LCD_write_char(11, 1, temp);/*分*/
temp = (time_buf[5] & 0x0F) + 0;
LCD_write_char(12, 1, temp);
LCD_write_char(13, 1, :);

temp = (time_buf[6] >> 4) + 0;
LCD_write_char(14, 1, temp);/*秒*/
temp = (time_buf[6] & 0x0F) + 0;
LCD_write_char(15, 1, temp);
}
}