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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
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 <libusb.h> | |
21 | #include "libsigrok.h" | |
22 | #include "libsigrok-internal.h" | |
23 | #include "fx2lafw.h" | |
24 | #include "command.h" | |
25 | ||
26 | SR_PRIV int command_get_fw_version(libusb_device_handle *devhdl, | |
27 | struct version_info *vi) | |
28 | { | |
29 | int ret; | |
30 | ||
31 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
32 | LIBUSB_ENDPOINT_IN, CMD_GET_FW_VERSION, 0x0000, 0x0000, | |
33 | (unsigned char *)vi, sizeof(struct version_info), 100); | |
34 | ||
35 | if (ret < 0) { | |
36 | sr_err("Unable to get version info: %s.", | |
37 | libusb_error_name(ret)); | |
38 | return SR_ERR; | |
39 | } | |
40 | ||
41 | return SR_OK; | |
42 | } | |
43 | ||
44 | SR_PRIV int command_get_revid_version(libusb_device_handle *devhdl, | |
45 | uint8_t *revid) | |
46 | { | |
47 | int ret; | |
48 | ||
49 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
50 | LIBUSB_ENDPOINT_IN, CMD_GET_REVID_VERSION, 0x0000, 0x0000, | |
51 | revid, 1, 100); | |
52 | ||
53 | if (ret < 0) { | |
54 | sr_err("Unable to get REVID: %s.", libusb_error_name(ret)); | |
55 | return SR_ERR; | |
56 | } | |
57 | ||
58 | return SR_OK; | |
59 | } | |
60 | ||
61 | SR_PRIV int command_start_acquisition(libusb_device_handle *devhdl, | |
62 | uint64_t samplerate, gboolean samplewide) | |
63 | { | |
64 | struct cmd_start_acquisition cmd; | |
65 | int delay = 0, ret; | |
66 | ||
67 | /* Compute the sample rate. */ | |
68 | if (samplewide && samplerate > MAX_16BIT_SAMPLE_RATE) { | |
69 | sr_err("Unable to sample at %" PRIu64 "Hz " | |
70 | "when collecting 16-bit samples.", samplerate); | |
71 | return SR_ERR; | |
72 | } | |
73 | ||
74 | if ((SR_MHZ(48) % samplerate) == 0) { | |
75 | cmd.flags = CMD_START_FLAGS_CLK_48MHZ; | |
76 | delay = SR_MHZ(48) / samplerate - 1; | |
77 | if (delay > MAX_SAMPLE_DELAY) | |
78 | delay = 0; | |
79 | } | |
80 | ||
81 | if (delay == 0 && (SR_MHZ(30) % samplerate) == 0) { | |
82 | cmd.flags = CMD_START_FLAGS_CLK_30MHZ; | |
83 | delay = SR_MHZ(30) / samplerate - 1; | |
84 | } | |
85 | ||
86 | sr_info("GPIF delay = %d, clocksource = %sMHz.", delay, | |
87 | (cmd.flags & CMD_START_FLAGS_CLK_48MHZ) ? "48" : "30"); | |
88 | ||
89 | if (delay <= 0 || delay > MAX_SAMPLE_DELAY) { | |
90 | sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate); | |
91 | return SR_ERR; | |
92 | } | |
93 | ||
94 | cmd.sample_delay_h = (delay >> 8) & 0xff; | |
95 | cmd.sample_delay_l = delay & 0xff; | |
96 | ||
97 | /* Select the sampling width. */ | |
98 | cmd.flags |= samplewide ? CMD_START_FLAGS_SAMPLE_16BIT : | |
99 | CMD_START_FLAGS_SAMPLE_8BIT; | |
100 | ||
101 | /* Send the control message. */ | |
102 | ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR | | |
103 | LIBUSB_ENDPOINT_OUT, CMD_START, 0x0000, 0x0000, | |
104 | (unsigned char *)&cmd, sizeof(cmd), 100); | |
105 | if (ret < 0) { | |
106 | sr_err("Unable to send start command: %s.", | |
107 | libusb_error_name(ret)); | |
108 | return SR_ERR; | |
109 | } | |
110 | ||
111 | return SR_OK; | |
112 | } |