2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 static void dump_packet(const char *msg, uint8_t *packet)
30 for (i = 0; i < PACKET_SIZE; i++)
31 sprintf(str + strlen(str), "%.2x ", packet[i]);
32 sr_dbg("%s: %s", msg, str);
36 static void handle_packet(const struct sr_dev_inst *sdi)
38 struct dev_context *devc;
39 struct sr_datafeed_packet packet;
40 struct sr_datafeed_analog analog;
41 struct sr_analog_encoding encoding;
42 struct sr_analog_meaning meaning;
43 struct sr_analog_spec spec;
44 float value, data[MAX_CHANNELS];
48 dump_packet("received", devc->packet);
50 /* Note: digits/spec_digits will be overridden later. */
51 sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
53 packet.type = SR_DF_ANALOG;
54 packet.payload = &analog;
55 analog.meaning->channels = sdi->channels;
56 analog.num_samples = 1;
58 analog.meaning->mq = SR_MQ_VOLTAGE;
59 analog.meaning->unit = SR_UNIT_VOLT;
60 analog.meaning->mqflags = SR_MQFLAG_DC;
61 analog.encoding->digits = 2;
62 analog.spec->spec_digits = 2;
64 for (i = 0; i < devc->model->num_channels; i++) {
66 value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 100.0;
67 ((float *)analog.data)[i] = value;
68 devc->config[i].output_voltage_last = value;
70 sr_session_send(sdi, &packet);
72 analog.meaning->mq = SR_MQ_CURRENT;
73 analog.meaning->unit = SR_UNIT_AMPERE;
74 analog.meaning->mqflags = 0;
75 analog.encoding->digits = 3;
76 analog.spec->spec_digits = 3;
78 for (i = 0; i < devc->model->num_channels; i++) {
80 value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 1000.0;
81 ((float *)analog.data)[i] = value;
82 devc->config[i].output_current_last = value;
84 sr_session_send(sdi, &packet);
86 for (i = 0; i < devc->model->num_channels; i++)
87 devc->config[i].output_enabled = (devc->packet[15] & (1 << i)) ? TRUE : FALSE;
89 devc->over_current_protection = devc->packet[18] ? TRUE : FALSE;
90 if (devc->packet[19] < 3)
91 devc->channel_mode = devc->packet[19];
95 SR_PRIV void send_packet(const struct sr_dev_inst *sdi, uint8_t *packet)
97 struct dev_context *devc;
98 struct sr_serial_dev_inst *serial;
102 if (serial_write_blocking(serial, packet, PACKET_SIZE, devc->delay_ms) < PACKET_SIZE)
103 sr_dbg("Failed to send packet.");
104 dump_packet("sent", packet);
107 SR_PRIV void send_config(const struct sr_dev_inst *sdi)
109 struct dev_context *devc;
110 uint8_t packet[PACKET_SIZE];
111 int value, offset, i;
114 memset(packet, 0, PACKET_SIZE);
119 for (i = 0; i < devc->model->num_channels; i++) {
121 value = devc->config[i].output_voltage_max * 100;
122 packet[offset] = (value >> 8) & 0xff;
123 packet[offset + 1] = value & 0xff;
124 value = devc->config[i].output_current_max * 1000;
125 packet[offset + 2] = (value >> 8) & 0xff;
126 packet[offset + 3] = value & 0xff;
127 if (devc->config[i].output_enabled_set)
128 packet[15] |= 1 << i;
130 packet[18] = devc->over_current_protection_set ? 1 : 0;
131 packet[19] = devc->channel_mode_set;
134 for (i = 0; i < PACKET_SIZE - 1; i++)
136 packet[i] = value & 0xff;
137 send_packet(sdi, packet);
138 devc->config_dirty = FALSE;
142 SR_PRIV int atten_pps3xxx_receive_data(int fd, int revents, void *cb_data)
144 struct dev_context *devc;
145 const struct sr_dev_inst *sdi;
146 struct sr_serial_dev_inst *serial;
151 if (!(sdi = cb_data))
154 if (!(devc = sdi->priv))
158 if (revents == G_IO_IN) {
159 if (serial_read_nonblocking(serial, &c, 1) < 0)
161 devc->packet[devc->packet_size++] = c;
162 if (devc->packet_size == PACKET_SIZE) {
164 devc->packet_size = 0;
165 if (devc->acquisition_running)
168 serial_source_remove(sdi->session, serial);
169 std_session_send_df_end(sdi);