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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*!
\file
\brief VAÊMÌÀ (Windows)
\author Satofumi KAMIMURA
$Id: SerialDevice_win.cpp 1811 2010-04-30 16:12:05Z satofumi $
*/
#include "DetectOS.h"
#include <windows.h>
#include <setupapi.h>
#include <string>
#include <cstdio>
#ifdef MSC
#define snprintf _snprintf
#endif
using namespace std;
#undef min
#undef max
class RawSerialDevice
{
string error_message_;
HANDLE hCom_;
int current_timeout_;
string com_name_;
public:
RawSerialDevice(void)
: error_message_("no error."), hCom_(INVALID_HANDLE_VALUE),
current_timeout_(0)
{
}
const char* what(void)
{
return error_message_.c_str();
}
bool connect(const char* device, long baudrate)
{
/* COM |[gðJ */
enum { NameLength = 11 };
char adjusted_device[NameLength];
snprintf(adjusted_device, NameLength, "\\\\.\\%s", device);
hCom_ = CreateFileA(adjusted_device, GENERIC_READ | GENERIC_WRITE, 0,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hCom_ == INVALID_HANDLE_VALUE) {
error_message_ = string("open failed: ") + device;
return false;
}
com_name_ = device;
// ÊMTCYÌXV
SetupComm(hCom_, 4096 * 8, 4096);
// ^CAEgÝè
setTimeout(current_timeout_);
// {[[gÌÏX
bool ret = setBaudrate(baudrate);
if (! ret) {
error_message_ = "fail SerialDevice::setBaudrate()";
}
return true;
}
void setTimeout(int timeout)
{
COMMTIMEOUTS timeouts;
GetCommTimeouts(hCom_, &timeouts);
timeouts.ReadIntervalTimeout = (timeout == 0) ? MAXDWORD : 0;
timeouts.ReadTotalTimeoutConstant = timeout;
timeouts.ReadTotalTimeoutMultiplier = 0;
SetCommTimeouts(hCom_, &timeouts);
}
void disconnect(void)
{
if (hCom_ != INVALID_HANDLE_VALUE) {
CloseHandle(hCom_);
hCom_ = INVALID_HANDLE_VALUE;
}
}
bool isConnected(void)
{
return (hCom_ == INVALID_HANDLE_VALUE) ? false : true;
}
bool setBaudrate(long baudrate)
{
long baudrate_value;
switch (baudrate) {
case 4800:
baudrate_value = CBR_4800;
break;
case 9600:
baudrate_value = CBR_9600;
break;
case 19200:
baudrate_value = CBR_19200;
break;
case 38400:
baudrate_value = CBR_38400;
break;
case 57600:
baudrate_value = CBR_57600;
break;
case 115200:
baudrate_value = CBR_115200;
break;
default:
baudrate_value = baudrate;
}
DCB dcb;
GetCommState(hCom_, &dcb);
dcb.BaudRate = baudrate_value;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.fParity = FALSE;
dcb.StopBits = ONESTOPBIT;
if (SetCommState(hCom_, &dcb) == 0) {
flush();
return false;
} else {
return true;
}
}
int send(const char* data, size_t count)
{
if (count <= 0) {
return 0;
}
DWORD n;
WriteFile(hCom_, data, (DWORD)count, &n, NULL);
return n;
}
int receive(char data[], int count, int timeout)
{
if (count <= 0) {
return 0;
}
if (timeout != current_timeout_) {
setTimeout(timeout);
current_timeout_ = timeout;
}
DWORD n;
ReadFile(hCom_, data, count, &n, NULL);
return n;
}
void flush(void)
{
PurgeComm(hCom_,
PURGE_RXABORT | PURGE_TXABORT |
PURGE_RXCLEAR | PURGE_TXCLEAR);
}
};
|