84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2012 Martin Ling <martin-git@earth.li>
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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 <stdlib.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <errno.h>
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#include <glib.h>
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#include "libsigrok.h"
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#include "libsigrok-internal.h"
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#include "protocol.h"
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SR_PRIV int rigol_ds1xx2_receive_data(int fd, int revents, void *cb_data)
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{
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struct sr_dev_inst *sdi;
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struct dev_context *devc;
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struct sr_datafeed_packet packet;
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struct sr_datafeed_analog analog;
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unsigned char buf[WAVEFORM_SIZE];
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float data[WAVEFORM_SIZE];
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int len, i;
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if (!(sdi = cb_data))
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return TRUE;
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if (!(devc = sdi->priv))
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return TRUE;
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if (revents == G_IO_IN) {
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len = read(fd, buf, WAVEFORM_SIZE);
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sr_dbg("Received %d bytes.", len);
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if (len == -1)
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return TRUE;
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for (i = 0; i < len; i++)
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data[i] = devc->scale / 25.6 * (128 - buf[i]) - devc->offset;
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analog.num_samples = len;
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analog.data = data;
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analog.mq = SR_MQ_VOLTAGE;
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analog.unit = SR_UNIT_VOLT;
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analog.mqflags = 0;
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packet.type = SR_DF_ANALOG;
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packet.payload = &analog;
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sr_session_send(cb_data, &packet);
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if (++devc->num_frames == devc->limit_frames)
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sdi->driver->dev_acquisition_stop(sdi, cb_data);
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else
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rigol_ds1xx2_send_data(fd, ":WAV:DATA?\n");
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}
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return TRUE;
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}
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SR_PRIV int rigol_ds1xx2_send_data(int fd, const char *format, ...)
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{
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va_list args;
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char buf[256];
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int len;
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va_start(args, format);
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len = vsprintf(buf, format, args);
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va_end(args);
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len = write(fd, buf, len);
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sr_dbg("Sent '%s'.", buf);
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return len;
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}
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