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
|
#include "common.h"
#include "serial.h"
#define PORT 0x3f8 //COM1
void initializeSerial()
{
outb(PORT + 1, 0x00); // Disable all interrupts
outb(PORT + 3, 0x80); // Enable DLAB (set baud rate divisor)
outb(PORT + 0, 0x03); // Set divisor to 3 (lo byte) 38400 baud
outb(PORT + 1, 0x00); // (hi byte)
outb(PORT + 3, 0x03); // 8 bits, no parity, one stop bit
outb(PORT + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
outb(PORT + 4, 0x0B); // IRQs enabled, RTS/DSR set
}
int serialReceived()
{
return inb(PORT + 5) & 1;
}
char readSerial()
{
while (serialReceived() == 0);
return inb(PORT);
}
int isTransmitEmpty()
{
return inb(PORT + 5) & 0x20;
}
void writeSerial(char a)
{
while (isTransmitEmpty() == 0);
outb(PORT,a);
}
void Serial_PrintF(const char *format, ...)
{
char **arg = (char **) &format;
char c;
char buf[20];
//arg++;
__builtin_va_list vl;
__builtin_va_start(vl, format);
while ((c = *format++) != 0)
{
if (c != '%')
writeSerial(c);
else
{
char *p;
c = *format++;
switch (c)
{
case 'x':
buf[0] = '0';
buf[1] = 'x';
//itoa (buf + 2, c, *((int *) arg++));
itoa (buf + 2, c, __builtin_va_arg(vl, int));
p = buf;
goto string;
break;
case 'd':
case 'u':
//itoa (buf, c, *((int *) arg++));
itoa (buf, c, __builtin_va_arg(vl, int));
p = buf;
goto string;
break;
case 's':
//p = *arg++;
p = __builtin_va_arg(vl, char*);
if (! p)
p = "(null)";
string:
while (*p)
writeSerial(*p++);
break;
default:
//writeSerial(*((int *) arg++));
writeSerial(__builtin_va_arg(vl, int));
break;
}
}
}
__builtin_va_end(vl);
}
|