113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libusb.h>
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#include "fx2lafw.h"
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#include "command.h"
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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SR_PRIV int command_get_fw_version(libusb_device_handle *devhdl,
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struct version_info *vi)
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{
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int ret;
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ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
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LIBUSB_ENDPOINT_IN, CMD_GET_FW_VERSION, 0x0000, 0x0000,
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(unsigned char *)vi, sizeof(struct version_info), 100);
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if (ret < 0) {
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sr_err("fx2lafw: Unable to get version info: %d.", ret);
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return SR_ERR;
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}
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return SR_OK;
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}
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SR_PRIV int command_get_revid_version(libusb_device_handle *devhdl,
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uint8_t *revid)
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{
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int ret;
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ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
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LIBUSB_ENDPOINT_IN, CMD_GET_REVID_VERSION, 0x0000, 0x0000,
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revid, 1, 100);
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if (ret < 0) {
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sr_err("fx2lafw: Unable to get REVID: %d.", ret);
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return SR_ERR;
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}
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return SR_OK;
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}
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SR_PRIV int command_start_acquisition(libusb_device_handle *devhdl,
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uint64_t samplerate, gboolean samplewide)
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{
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struct cmd_start_acquisition cmd;
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int delay = 0, ret;
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/* Compute the sample rate. */
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if (samplewide && samplerate > MAX_16BIT_SAMPLE_RATE) {
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sr_err("fx2lafw: Unable to sample at %" PRIu64 "Hz "
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"when collecting 16-bit samples.", samplerate);
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return SR_ERR;
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}
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if ((SR_MHZ(48) % samplerate) == 0) {
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cmd.flags = CMD_START_FLAGS_CLK_48MHZ;
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delay = SR_MHZ(48) / samplerate - 1;
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if (delay > MAX_SAMPLE_DELAY)
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delay = 0;
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}
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if (delay == 0 && (SR_MHZ(30) % samplerate) == 0) {
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cmd.flags = CMD_START_FLAGS_CLK_30MHZ;
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delay = SR_MHZ(30) / samplerate - 1;
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}
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sr_info("fx2lafw: GPIF delay = %d, clocksource = %sMHz", delay,
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(cmd.flags & CMD_START_FLAGS_CLK_48MHZ) ? "48" : "30");
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if (delay <= 0 || delay > MAX_SAMPLE_DELAY) {
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sr_err("fx2lafw: Unable to sample at %" PRIu64 "Hz.",
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samplerate);
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return SR_ERR;
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}
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cmd.sample_delay_h = (delay >> 8) & 0xff;
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cmd.sample_delay_l = delay & 0xff;
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/* Select the sampling width */
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cmd.flags |= samplewide ? CMD_START_FLAGS_SAMPLE_16BIT :
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CMD_START_FLAGS_SAMPLE_8BIT;
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/* Send the control message. */
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ret = libusb_control_transfer(devhdl, LIBUSB_REQUEST_TYPE_VENDOR |
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LIBUSB_ENDPOINT_OUT, CMD_START, 0x0000, 0x0000,
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(unsigned char *)&cmd, sizeof(cmd), 100);
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if (ret < 0) {
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sr_err("fx2lafw: Unable to send start command: %d.", ret);
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return SR_ERR;
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}
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return SR_OK;
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}
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