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
136
137
138
139
|
/*
* Copyright (c) 2012, 2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
/*
* Console driver for Lauterbach Trace32 Simulator. The implementation is
* based on the example in "demo/powerpc/etc/terminal/terminal_mpc85xx.cmm" in
* the Trace32 system directory.
*/
#include <rtems/bspIo.h>
#include <rtems/console.h>
#include <rtems/termiostypes.h>
volatile unsigned char messagebufferin[256];
volatile unsigned char messagebufferout[256];
typedef struct {
rtems_termios_device_context base;
int input_size;
int input_index;
} t32_console_context;
static t32_console_context t32_console_instance;
static bool t32_console_first_open(
rtems_termios_tty *tty,
rtems_termios_device_context *base,
struct termios *term,
rtems_libio_open_close_args_t *args
)
{
rtems_termios_set_initial_baud(tty, 115200);
return true;
}
static int t32_console_read_polled(rtems_termios_device_context *base)
{
t32_console_context *ctx = (t32_console_context *) base;
int c;
if (ctx->input_size == 0) {
int new_bufsize = messagebufferin[0];
if (new_bufsize != 0) {
ctx->input_size = new_bufsize;
ctx->input_index = 0;
} else {
return -1;
}
}
c = messagebufferin[4 + ctx->input_index];
++ctx->input_index;
if (ctx->input_index >= ctx->input_size) {
messagebufferin[0] = 0;
ctx->input_size = 0;
}
return c;
}
static void t32_console_write_char_polled(char c)
{
while (messagebufferout[0] != 0) {
/* Wait for ready */
}
messagebufferout[4] = (unsigned char) c;
messagebufferout[0] = 1;
}
static void t32_console_write_polled(
rtems_termios_device_context *base,
const char *s,
size_t n
)
{
size_t i;
for (i = 0; i < n; ++i) {
t32_console_write_char_polled(s[i]);
}
}
const rtems_termios_device_handler t32_console_handler = {
.first_open = t32_console_first_open,
.poll_read = t32_console_read_polled,
.write = t32_console_write_polled,
.mode = TERMIOS_POLLED
};
rtems_device_driver console_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
t32_console_context *ctx = &t32_console_instance;
rtems_termios_initialize();
rtems_termios_device_context_initialize(&ctx->base, "T32 Console");
rtems_termios_device_install(
CONSOLE_DEVICE_NAME,
major,
0,
&t32_console_handler,
NULL,
&ctx->base
);
return RTEMS_SUCCESSFUL;
}
static void t32_output_char(char c)
{
if (c == '\n') {
t32_console_write_char_polled('\r');
}
t32_console_write_char_polled(c);
}
BSP_output_char_function_type BSP_output_char = t32_output_char;
BSP_polling_getchar_function_type BSP_poll_char = NULL;
|
