2 * This file is part of the libsigrok project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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/>.
21 #include "libsigrok.h"
22 #include "libsigrok-internal.h"
26 SR_PRIV int command_get_fw_version(libusb_device_handle *devhdl,
27 struct version_info *vi)
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);
36 sr_err("Unable to get version info: %s.",
37 libusb_error_name(ret));
44 SR_PRIV int command_get_revid_version(libusb_device_handle *devhdl,
49 ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
50 LIBUSB_ENDPOINT_IN, CMD_GET_REVID_VERSION, 0x0000, 0x0000,
54 sr_err("Unable to get REVID: %s.", libusb_error_name(ret));
61 SR_PRIV int command_start_acquisition(libusb_device_handle *devhdl,
62 uint64_t samplerate, gboolean samplewide)
64 struct cmd_start_acquisition cmd;
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);
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)
81 if (delay == 0 && (SR_MHZ(30) % samplerate) == 0) {
82 cmd.flags = CMD_START_FLAGS_CLK_30MHZ;
83 delay = SR_MHZ(30) / samplerate - 1;
86 sr_info("GPIF delay = %d, clocksource = %sMHz.", delay,
87 (cmd.flags & CMD_START_FLAGS_CLK_48MHZ) ? "48" : "30");
89 if (delay <= 0 || delay > MAX_SAMPLE_DELAY) {
90 sr_err("Unable to sample at %" PRIu64 "Hz.", samplerate);
94 cmd.sample_delay_h = (delay >> 8) & 0xff;
95 cmd.sample_delay_l = delay & 0xff;
97 /* Select the sampling width. */
98 cmd.flags |= samplewide ? CMD_START_FLAGS_SAMPLE_16BIT :
99 CMD_START_FLAGS_SAMPLE_8BIT;
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);
106 sr_err("Unable to send start command: %s.",
107 libusb_error_name(ret));