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
194
195
|
/*
libusbrelay_py: Control USB HID connected electrical relay modules
Copyright (C) 2014 Darryl Bond
Library version
Copyright (C) 2019 Sean Mollet
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; either version 2 of the License, or
(at your option) any later version.
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <wchar.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include "libusbrelay.h"
#include "Python.h"
//Static function declarations
static PyObject *usbrelay_init(PyObject *self, PyObject *args);
static PyObject *usbrelay_board_count(PyObject *self, PyObject *args);
static PyObject *usbrelay_board_details(PyObject *self, PyObject *args);
static PyObject *usbrelay_board_control(PyObject *self, PyObject *args);
//Required because this won't be used here, that's intentional: Python uses it
// #pragma GCC diagnostic push
// #pragma GCC diagnostic ignored "-Wunused-variable"
// #pragma GCC diagnostic pop
static PyMethodDef UsbRelayMethods[] = {
{"init", usbrelay_init, METH_VARARGS,
"Initialize the module and enumerate relay boards"},
{"board_count", usbrelay_board_count, METH_VARARGS,
"Return the count of enumerated boards"},
{"board_details", usbrelay_board_details, METH_VARARGS,
"Return details on the enumerated boards"},
{"board_control", usbrelay_board_control, METH_VARARGS,
"Control a relay on a specific board"},
{NULL, NULL, 0, NULL} /* Sentinel */
};
static struct PyModuleDef usb_relaymodule = {
PyModuleDef_HEAD_INIT,
"usbrelay_py", /* name of module */
NULL, /* module documentation, may be NULL */
-1, /* size of per-interpreter state of the module,
or -1 if the module keeps state in global variables. */
UsbRelayMethods};
PyMODINIT_FUNC PyInit_usbrelay_py(void)
{
//Attempt to enumerate the relays while we're here
// int result = -1;
// result = enumerate_relay_boards(NULL,0,0);
//Give Python our API
return PyModule_Create(&usb_relaymodule);
}
// /**
// * Initialize the usb_relay system with an optional product string
// * Including enumerating the attached boards
// */
static PyObject *usbrelay_init(PyObject *self, PyObject *args)
{
const char *product = NULL;
int result = -1;
//If there is no argument, product will remain null
//Which is fine
PyArg_ParseTuple(args, "s", &product);
result = enumerate_relay_boards(product,0,0);
return Py_BuildValue("i", result);
}
/**
* Retrieve the count of attached relay boards
*/
static PyObject *usbrelay_board_count(PyObject *self, PyObject *args)
{
int board_count = 0;
board_count = get_relay_board_count();
//Just in case they didn't initialize, we'll try once to get a different result
if (board_count == 0)
{
enumerate_relay_boards(NULL,0,0);
board_count = get_relay_board_count();
}
return Py_BuildValue("i", board_count);
}
/**
* Retrieve the names of attached boards and their relay counts and statuses
*/
static PyObject *usbrelay_board_details(PyObject *self, PyObject *args)
{
PyObject *result;
PyObject **boards;
int board_count = get_relay_board_count();
relay_board *relay_boards = get_relay_boards();
boards = malloc(sizeof(PyObject *) * board_count);
//Pack up our board information into Python Typles
int i;
for (i = 0; i < board_count; i++)
{
boards[i] = Py_BuildValue("(sii)", relay_boards[i].serial, relay_boards[i].relay_count, relay_boards[i].state);
}
//This is not the ideal way to do this, but hand-brewing a va_list is generally considered "bad" and not portable
switch (board_count)
{
default:
result = Py_BuildValue("()");
break;
case 1:
result = Py_BuildValue("(O)", boards[0]);
break;
case 2:
result = Py_BuildValue("(OO)", boards[0], boards[1]);
break;
case 3:
result = Py_BuildValue("(OOO)", boards[0], boards[1], boards[2]);
break;
case 4:
result = Py_BuildValue("(OOOO)", boards[0], boards[1], boards[2], boards[3]);
break;
case 5:
result = Py_BuildValue("(OOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4]);
break;
case 6:
result = Py_BuildValue("(OOOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4],
boards[5]);
break;
case 7:
result = Py_BuildValue("(OOOOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4],
boards[5], boards[6]);
break;
case 8:
result = Py_BuildValue("(OOOOOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4],
boards[5], boards[6], boards[7]);
break;
case 9:
result = Py_BuildValue("(OOOOOOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4],
boards[5], boards[6], boards[7], boards[8]);
break;
case 10:
result = Py_BuildValue("(OOOOOOOOOO)", boards[0], boards[1], boards[2], boards[3], boards[4],
boards[5], boards[6], boards[7], boards[8], boards[9]);
break;
}
free(boards);
return result;
}
/**
* Set a relay status
*/
static PyObject *usbrelay_board_control(PyObject *self, PyObject *args)
{
const char *serial;
int relay;
int status;
int result = -1;
//If there is no argument, or it's ill formed, we just refuse to do anything
if (PyArg_ParseTuple(args, "sii", &serial, &relay, &status))
{
char target_state = CMD_OFF;
if (status)
{
target_state = CMD_ON;
}
result = operate_relay(serial, relay, target_state,0);
}
return Py_BuildValue("i", result);
}
|
