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
|
/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ao.h"
#ifdef AVR
#undef putchar
#undef getchar
#define putchar(c) ao_putchar(c)
#define getchar() ao_getchar()
#endif
/*
* Basic I/O functions to support SDCC stdio package
*/
#define AO_NUM_STDIOS (HAS_USB + PACKET_HAS_SLAVE + USE_SERIAL_STDIN)
__xdata struct ao_stdio ao_stdios[AO_NUM_STDIOS];
__data int8_t ao_cur_stdio;
__data int8_t ao_num_stdios;
void
putchar(char c)
{
if (ao_cur_stdio >= ao_num_stdios || !ao_stdios[ao_cur_stdio].putchar)
return;
if (c == '\n')
(*ao_stdios[ao_cur_stdio].putchar)('\r');
(*ao_stdios[ao_cur_stdio].putchar)(c);
}
void
flush(void)
{
if (ao_stdios[ao_cur_stdio].flush)
ao_stdios[ao_cur_stdio].flush();
}
__xdata uint8_t ao_stdin_ready;
char
ao_getchar(void) __reentrant __critical
{
char c;
int8_t stdio = ao_cur_stdio;
for (;;) {
if (stdio < ao_num_stdios) {
c = ao_stdios[stdio].pollchar();
if (c != AO_READ_AGAIN)
break;
}
if (++stdio >= ao_num_stdios)
stdio = 0;
if (stdio == ao_cur_stdio)
ao_sleep(&ao_stdin_ready);
}
ao_cur_stdio = stdio;
return c;
}
uint8_t
ao_echo(void)
{
return ao_stdios[ao_cur_stdio].echo;
}
int8_t
ao_add_stdio(char (*pollchar)(void),
void (*putchar)(char),
void (*flush)(void)) __reentrant
{
if (ao_num_stdios == AO_NUM_STDIOS)
ao_panic(AO_PANIC_STDIO);
ao_stdios[ao_num_stdios].pollchar = pollchar;
ao_stdios[ao_num_stdios].putchar = putchar;
ao_stdios[ao_num_stdios].flush = flush;
ao_stdios[ao_num_stdios].echo = 1;
ao_wakeup(&ao_stdin_ready);
return ao_num_stdios++;
}
#ifdef AVR
int
stdio_put(char c, FILE *stream)
{
#if 1
if (ao_cur_task && ao_num_stdios)
putchar(c);
else
#endif
{
if (c == '\n')
stdio_put('\r', stream);
loop_until_bit_is_set(UCSR1A, UDRE1);
UDR1 = c;
}
return 0;
}
int
stdio_get(FILE *stream)
{
return (int) getchar() & 0xff;
}
static FILE mystdout = FDEV_SETUP_STREAM(stdio_put, NULL, _FDEV_SETUP_WRITE);
static FILE mystdin = FDEV_SETUP_STREAM(NULL, stdio_get, _FDEV_SETUP_READ);
void
ao_stdio_init(void)
{
stdout = &mystdout;
stdin = &mystdin;
}
#endif
|
