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23f43dff ML |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2013 poljar (Damir Jelić) <poljarinho@gmail.com> | |
5 | * Copyright (C) 2013 Martin Ling <martin-sigrok@earth.li> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include "libsigrok.h" | |
22 | #include "libsigrok-internal.h" | |
23 | ||
24 | #include <glib.h> | |
25 | #include <string.h> | |
26 | ||
3544f848 | 27 | #define LOG_PREFIX "scpi_serial" |
23f43dff ML |
28 | |
29 | #define SCPI_READ_RETRIES 100 | |
30 | #define SCPI_READ_RETRY_TIMEOUT 10000 | |
31 | ||
05c644ea ML |
32 | struct scpi_serial { |
33 | struct sr_serial_dev_inst *serial; | |
34 | char last_character; | |
35 | }; | |
36 | ||
f754c146 AJ |
37 | static int scpi_serial_dev_inst_new(void *priv, const char *resource, |
38 | char **params, const char *serialcomm) | |
39 | { | |
40 | struct scpi_serial *sscpi = priv; | |
41 | ||
42 | (void)params; | |
43 | ||
44 | if (!(sscpi->serial = sr_serial_dev_inst_new(resource, serialcomm))) | |
45 | return SR_ERR; | |
46 | ||
47 | return SR_OK; | |
48 | } | |
49 | ||
d87c1766 | 50 | static int scpi_serial_open(void *priv) |
23f43dff | 51 | { |
05c644ea ML |
52 | struct scpi_serial *sscpi = priv; |
53 | struct sr_serial_dev_inst *serial = sscpi->serial; | |
23f43dff | 54 | |
9dfeb81b ML |
55 | if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK) |
56 | return SR_ERR; | |
57 | ||
58 | if (serial_flush(serial) != SR_OK) | |
59 | return SR_ERR; | |
60 | ||
61 | return SR_OK; | |
23f43dff ML |
62 | } |
63 | ||
d87c1766 | 64 | static int scpi_serial_source_add(void *priv, int events, int timeout, |
23f43dff ML |
65 | sr_receive_data_callback_t cb, void *cb_data) |
66 | { | |
05c644ea ML |
67 | struct scpi_serial *sscpi = priv; |
68 | struct sr_serial_dev_inst *serial = sscpi->serial; | |
23f43dff | 69 | |
abc4b335 | 70 | return serial_source_add(serial, events, timeout, cb, cb_data); |
23f43dff ML |
71 | } |
72 | ||
d87c1766 | 73 | static int scpi_serial_source_remove(void *priv) |
23f43dff | 74 | { |
05c644ea ML |
75 | struct scpi_serial *sscpi = priv; |
76 | struct sr_serial_dev_inst *serial = sscpi->serial; | |
23f43dff | 77 | |
7faa3e88 | 78 | return serial_source_remove(serial); |
23f43dff ML |
79 | } |
80 | ||
d87c1766 | 81 | static int scpi_serial_send(void *priv, const char *command) |
23f43dff | 82 | { |
721fc227 | 83 | int len, result, written; |
23f43dff | 84 | gchar *terminated_command; |
05c644ea ML |
85 | struct scpi_serial *sscpi = priv; |
86 | struct sr_serial_dev_inst *serial = sscpi->serial; | |
23f43dff ML |
87 | |
88 | terminated_command = g_strconcat(command, "\n", NULL); | |
89 | len = strlen(terminated_command); | |
721fc227 ML |
90 | written = 0; |
91 | while (written < len) { | |
92 | result = serial_write(serial, terminated_command + written, len - written); | |
93 | if (result < 0) { | |
94 | sr_err("Error while sending SCPI command: '%s'.", command); | |
95 | g_free(terminated_command); | |
96 | return SR_ERR; | |
97 | } | |
98 | written += result; | |
23f43dff ML |
99 | } |
100 | ||
721fc227 ML |
101 | g_free(terminated_command); |
102 | ||
23f43dff ML |
103 | sr_spew("Successfully sent SCPI command: '%s'.", command); |
104 | ||
105 | return SR_OK; | |
106 | } | |
107 | ||
d87c1766 | 108 | static int scpi_serial_read_begin(void *priv) |
05c644ea ML |
109 | { |
110 | struct scpi_serial *sscpi = priv; | |
111 | ||
112 | sscpi->last_character = '\0'; | |
113 | ||
114 | return SR_OK; | |
115 | } | |
116 | ||
d87c1766 | 117 | static int scpi_serial_read_data(void *priv, char *buf, int maxlen) |
bc03a7cc | 118 | { |
05c644ea ML |
119 | struct scpi_serial *sscpi = priv; |
120 | int ret; | |
121 | ||
122 | ret = serial_read(sscpi->serial, buf, maxlen); | |
123 | ||
124 | if (ret < 0) | |
125 | return ret; | |
126 | ||
127 | if (ret > 0) { | |
128 | sscpi->last_character = buf[ret - 1]; | |
129 | if (sscpi->last_character == '\n') | |
130 | ret--; | |
131 | } | |
132 | ||
133 | return ret; | |
bc03a7cc | 134 | } |
05c644ea | 135 | |
d87c1766 | 136 | static int scpi_serial_read_complete(void *priv) |
05c644ea ML |
137 | { |
138 | struct scpi_serial *sscpi = priv; | |
139 | ||
140 | return (sscpi->last_character == '\n'); | |
141 | } | |
142 | ||
bc03a7cc BV |
143 | static int scpi_serial_close(void *priv) |
144 | { | |
05c644ea | 145 | struct scpi_serial *sscpi = priv; |
05c644ea | 146 | |
f754c146 | 147 | return serial_close(sscpi->serial); |
bc03a7cc | 148 | } |
05c644ea | 149 | |
bc03a7cc BV |
150 | static void scpi_serial_free(void *priv) |
151 | { | |
05c644ea | 152 | struct scpi_serial *sscpi = priv; |
05c644ea | 153 | |
f754c146 | 154 | sr_serial_dev_inst_free(sscpi->serial); |
bc03a7cc BV |
155 | } |
156 | ||
f754c146 AJ |
157 | SR_PRIV const struct sr_scpi_dev_inst scpi_serial_dev = { |
158 | .name = "serial", | |
159 | .prefix = "", | |
160 | .priv_size = sizeof(struct scpi_serial), | |
161 | .dev_inst_new = scpi_serial_dev_inst_new, | |
162 | .open = scpi_serial_open, | |
163 | .source_add = scpi_serial_source_add, | |
164 | .source_remove = scpi_serial_source_remove, | |
165 | .send = scpi_serial_send, | |
166 | .read_begin = scpi_serial_read_begin, | |
167 | .read_data = scpi_serial_read_data, | |
168 | .read_complete = scpi_serial_read_complete, | |
169 | .close = scpi_serial_close, | |
170 | .free = scpi_serial_free, | |
171 | }; |