/
Real_time_clock.c
135 lines (117 loc) · 1.96 KB
/
Real_time_clock.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
Author:- Shreya Deodhar
Program Of Multiplexed 8 Seven Segment Using Max7221 And Controlled With ARM(LPC21XX) Using SPI Protocol
*/
#include<lpc21xx.h>
#define LCD (0xff<<16)
#define RS (1<<13)
#define RW (1<<14)
#define EN (1<<15)
void delay_fv(unsigned int x,int y);
void lcd_display(unsigned int x);
void cmd(unsigned char m);
void lcd_pos(int line,int pos);
void lcd_ini();
void lcd_str(unsigned char *x);
void init_rtc();
unsigned char flag=0;
void main()
{
unsigned int i,j,k,l,m,n;
PINSEL0=0X00000000;
PINSEL1=0X00000000;
IO0DIR=0XFFFFFFFF;
lcd_init();
init_rtc();
lcd_str("CLOCK:- 24");
cmd(0xc0);
lcd_str("00:00:00");
while(1)
{
if(flag)
{
flag=0;
lcd_pos(2,0);
lcd_display(HOUR/10 + '0');
lcd_display(HOUR%10 + '0');
lcd_display(':') ;
lcd_display(MIN/10 + '0');
lcd_display(MIN%10 + '0');
lcd_display(':') ;
lcd_display(SEC/10 + '0');
lcd_display(SEC%10 + '0');
}
}
}
void delay_fv(unsigned int x,int y)
{
unsigned int i,j;
for(i=0;i<x;i++)
{
for(j=0;j<y;j++){};
}
}
void lcd_display(unsigned int x)
{
IO0CLR|=(RS|RW|EN|LCD);
IO0SET|=(x<<16);
IO0SET|=RS;
IO0CLR|=RW;
IO0SET|=EN;
delay_fv(100,10);
IO0CLR|=EN;
delay_fv(10,10);
}
void cmd(unsigned char m)
{
IO0CLR|=(RS|RW|EN|LCD);
IO0SET|=(m<<16);
IO0CLR|=RS;
IO0CLR|=RW;
IO0SET|=EN;
delay_fv(100,250);
IO0CLR|=EN;
delay_fv(10,10);
}
void lcd_pos(int line,int pos)
{
if(line==1)
cmd(0x80+pos);
else if(line==2)
cmd(0xc0+pos);
}
void lcd_init()
{
cmd(0X38);
cmd(0X0e);
cmd(0X06);
cmd(0X01);
cmd(0X80);
}
void lcd_str(unsigned char *x)
{
while(*x!='\0')
{
lcd_display(*x);
x++;
}
}
void rtc_int(void)__irq
{
ILR = 0X01;
flag = 1;
VICVectAddr = 0X00000000;
}
void init_rtc()
{
ILR = 0X01;
CCR = 0X13;
CCR = 0X11;
CIIR = 0X01;
SEC = 0X00;
HOUR = 12;
MIN = 11;
VICIntEnable = 0x00002000;
VICVectCntl0 = 0x0000002D;
VICVectAddr0 = (unsigned)rtc_int;
}