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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Bert Vermeulen <bert@biot.com> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <string.h> | |
22 | #include "protocol.h" | |
23 | ||
24 | static void dump_packet(char *msg, uint8_t *packet) | |
25 | { | |
26 | int i; | |
27 | char str[128]; | |
28 | ||
29 | str[0] = 0; | |
30 | for (i = 0; i < PACKET_SIZE; i++) | |
31 | sprintf(str + strlen(str), "%.2x ", packet[i]); | |
32 | sr_dbg("%s: %s", msg, str); | |
33 | ||
34 | } | |
35 | ||
36 | static void handle_packet(const struct sr_dev_inst *sdi) | |
37 | { | |
38 | struct dev_context *devc; | |
39 | struct sr_datafeed_packet packet; | |
40 | struct sr_datafeed_analog_old analog; | |
41 | float value, data[MAX_CHANNELS]; | |
42 | int offset, i; | |
43 | ||
44 | devc = sdi->priv; | |
45 | dump_packet("received", devc->packet); | |
46 | packet.type = SR_DF_ANALOG_OLD; | |
47 | packet.payload = &analog; | |
48 | analog.channels = sdi->channels; | |
49 | analog.num_samples = 1; | |
50 | ||
51 | analog.mq = SR_MQ_VOLTAGE; | |
52 | analog.unit = SR_UNIT_VOLT; | |
53 | analog.mqflags = SR_MQFLAG_DC; | |
54 | analog.data = data; | |
55 | for (i = 0; i < devc->model->num_channels; i++) { | |
56 | offset = 2 + i * 4; | |
57 | value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 100.0; | |
58 | analog.data[i] = value; | |
59 | devc->config[i].output_voltage_last = value; | |
60 | } | |
61 | sr_session_send(sdi, &packet); | |
62 | ||
63 | analog.mq = SR_MQ_CURRENT; | |
64 | analog.unit = SR_UNIT_AMPERE; | |
65 | analog.mqflags = 0; | |
66 | analog.data = data; | |
67 | for (i = 0; i < devc->model->num_channels; i++) { | |
68 | offset = 4 + i * 4; | |
69 | value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 1000.0; | |
70 | analog.data[i] = value; | |
71 | devc->config[i].output_current_last = value; | |
72 | } | |
73 | sr_session_send(sdi, &packet); | |
74 | ||
75 | for (i = 0; i < devc->model->num_channels; i++) | |
76 | devc->config[i].output_enabled = (devc->packet[15] & (1 << i)) ? TRUE : FALSE; | |
77 | ||
78 | devc->over_current_protection = devc->packet[18] ? TRUE : FALSE; | |
79 | if (devc->packet[19] < 3) | |
80 | devc->channel_mode = devc->packet[19]; | |
81 | ||
82 | } | |
83 | ||
84 | SR_PRIV void send_packet(const struct sr_dev_inst *sdi, uint8_t *packet) | |
85 | { | |
86 | struct dev_context *devc; | |
87 | struct sr_serial_dev_inst *serial; | |
88 | ||
89 | devc = sdi->priv; | |
90 | serial = sdi->conn; | |
91 | if (serial_write_blocking(serial, packet, PACKET_SIZE, devc->delay_ms) < PACKET_SIZE) | |
92 | sr_dbg("Failed to send packet."); | |
93 | dump_packet("sent", packet); | |
94 | } | |
95 | ||
96 | SR_PRIV void send_config(const struct sr_dev_inst *sdi) | |
97 | { | |
98 | struct dev_context *devc; | |
99 | uint8_t packet[PACKET_SIZE]; | |
100 | int value, offset, i; | |
101 | ||
102 | devc = sdi->priv; | |
103 | memset(packet, 0, PACKET_SIZE); | |
104 | packet[0] = 0xaa; | |
105 | packet[1] = 0x20; | |
106 | packet[14] = 0x01; | |
107 | packet[16] = 0x01; | |
108 | for (i = 0; i < devc->model->num_channels; i++) { | |
109 | offset = 2 + i * 4; | |
110 | value = devc->config[i].output_voltage_max * 100; | |
111 | packet[offset] = (value >> 8) & 0xff; | |
112 | packet[offset + 1] = value & 0xff; | |
113 | value = devc->config[i].output_current_max * 1000; | |
114 | packet[offset + 2] = (value >> 8) & 0xff; | |
115 | packet[offset + 3] = value & 0xff; | |
116 | if (devc->config[i].output_enabled_set) | |
117 | packet[15] |= 1 << i; | |
118 | } | |
119 | packet[18] = devc->over_current_protection_set ? 1 : 0; | |
120 | packet[19] = devc->channel_mode_set; | |
121 | /* Checksum. */ | |
122 | value = 0; | |
123 | for (i = 0; i < PACKET_SIZE - 1; i++) | |
124 | value += packet[i]; | |
125 | packet[i] = value & 0xff; | |
126 | send_packet(sdi, packet); | |
127 | devc->config_dirty = FALSE; | |
128 | ||
129 | } | |
130 | ||
131 | SR_PRIV int atten_pps3xxx_receive_data(int fd, int revents, void *cb_data) | |
132 | { | |
133 | struct dev_context *devc; | |
134 | const struct sr_dev_inst *sdi; | |
135 | struct sr_serial_dev_inst *serial; | |
136 | struct sr_datafeed_packet packet; | |
137 | unsigned char c; | |
138 | ||
139 | (void)fd; | |
140 | ||
141 | if (!(sdi = cb_data)) | |
142 | return TRUE; | |
143 | ||
144 | if (!(devc = sdi->priv)) | |
145 | return TRUE; | |
146 | ||
147 | serial = sdi->conn; | |
148 | if (revents == G_IO_IN) { | |
149 | if (serial_read_nonblocking(serial, &c, 1) < 0) | |
150 | return TRUE; | |
151 | devc->packet[devc->packet_size++] = c; | |
152 | if (devc->packet_size == PACKET_SIZE) { | |
153 | handle_packet(sdi); | |
154 | devc->packet_size = 0; | |
155 | if (devc->acquisition_running) | |
156 | send_config(sdi); | |
157 | else { | |
158 | serial_source_remove(sdi->session, serial); | |
159 | packet.type = SR_DF_END; | |
160 | sr_session_send(sdi, &packet); | |
161 | } | |
162 | } | |
163 | } | |
164 | ||
165 | return TRUE; | |
166 | } |