+++ /dev/null
-/*
- * This file is part of the sigrok project.
- *
- * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
- * With protocol information from the hantekdso project,
- * Copyright (C) 2008 Oleg Khudyakov <prcoder@gmail.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "config.h"
-#include "dso.h"
-#include <string.h>
-#include <glib.h>
-#include <libusb.h>
-
-extern struct sr_dev_driver hantek_dso_driver_info;
-static struct sr_dev_driver *hdi = &hantek_dso_driver_info;
-
-
-static int send_begin(struct dev_context *devc)
-{
- int ret;
- unsigned char buffer[] = {0x0f, 0x03, 0x03, 0x03, 0x68, 0xac, 0xfe,
- 0x00, 0x01, 0x00};
-
- sr_dbg("hantek-dso: sending CTRL_BEGINCOMMAND");
-
- if ((ret = libusb_control_transfer(devc->usb->devhdl,
- LIBUSB_REQUEST_TYPE_VENDOR, CTRL_BEGINCOMMAND,
- 0, 0, buffer, sizeof(buffer), 200)) != sizeof(buffer)) {
- sr_err("failed to send begincommand: %d", ret);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-static int send_bulkcmd(struct dev_context *devc, uint8_t *cmdstring, int cmdlen)
-{
- int ret, tmp;
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, cmdlen, &tmp, 200)) != 0)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV int dso_getmps(libusb_device *dev)
-{
- struct libusb_device_descriptor des;
- struct libusb_config_descriptor *conf_dsc;
- const struct libusb_interface_descriptor *intf_dsc;
- int mps;
-
- if (libusb_get_device_descriptor(dev, &des) != 0)
- return 0;
-
- if (des.bNumConfigurations != 1)
- return 0;
-
- if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
- return 0;
-
- mps = 0;
- intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
- if (intf_dsc->bNumEndpoints != 2)
- goto err;
-
- if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
- (2 | LIBUSB_ENDPOINT_OUT))
- /* The first endpoint should be 2 (outbound). */
- goto err;
-
- if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
- (6 | LIBUSB_ENDPOINT_IN))
- /* The second endpoint should be 6 (inbound). */
- goto err;
-
- mps = intf_dsc->endpoint[1].wMaxPacketSize;
-
-err:
- if (conf_dsc)
- libusb_free_config_descriptor(conf_dsc);
-
- return mps;
-}
-
-SR_PRIV int dso_open(struct sr_dev_inst *sdi)
-{
- libusb_device **devlist;
- struct libusb_device_descriptor des;
- struct drv_context *drvc;
- struct dev_context *devc;
- int err, skip, i;
-
- drvc = hdi->priv;
- devc = sdi->priv;
-
- if (sdi->status == SR_ST_ACTIVE)
- /* already in use */
- return SR_ERR;
-
- skip = 0;
- libusb_get_device_list(drvc->usb_context, &devlist);
- for (i = 0; devlist[i]; i++) {
- if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
- sr_err("hantek-dso: failed to get device descriptor: %d", err);
- continue;
- }
-
- if (des.idVendor != devc->profile->fw_vid
- || des.idProduct != devc->profile->fw_pid)
- continue;
-
- if (sdi->status == SR_ST_INITIALIZING) {
- if (skip != sdi->index) {
- /* Skip devices of this type that aren't the one we want. */
- skip += 1;
- continue;
- }
- } else if (sdi->status == SR_ST_INACTIVE) {
- /*
- * This device is fully enumerated, so we need to find
- * this device by vendor, product, bus and address.
- */
- if (libusb_get_bus_number(devlist[i]) != devc->usb->bus
- || libusb_get_device_address(devlist[i]) != devc->usb->address)
- /* this is not the one */
- continue;
- }
-
- if (!(err = libusb_open(devlist[i], &devc->usb->devhdl))) {
- if (devc->usb->address == 0xff)
- /*
- * first time we touch this device after firmware upload,
- * so we don't know the address yet.
- */
- devc->usb->address = libusb_get_device_address(devlist[i]);
-
- if(!(devc->epin_maxpacketsize = dso_getmps(devlist[i])))
- sr_err("hantek-dso: wrong endpoint profile");
- else {
- sdi->status = SR_ST_ACTIVE;
- sr_info("hantek-dso: opened device %d on %d.%d interface %d",
- sdi->index, devc->usb->bus,
- devc->usb->address, USB_INTERFACE);
- }
- } else {
- sr_err("hantek-dso: failed to open device: %d", err);
- }
-
- /* if we made it here, we handled the device one way or another */
- break;
- }
- libusb_free_device_list(devlist, 1);
-
- if (sdi->status != SR_ST_ACTIVE)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV void dso_close(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
-
- devc = sdi->priv;
-
- if (devc->usb->devhdl == NULL)
- return;
-
- sr_info("hantek-dso: closing device %d on %d.%d interface %d", sdi->index,
- devc->usb->bus, devc->usb->address, USB_INTERFACE);
- libusb_release_interface(devc->usb->devhdl, USB_INTERFACE);
- libusb_close(devc->usb->devhdl);
- devc->usb->devhdl = NULL;
- sdi->status = SR_ST_INACTIVE;
-
-}
-
-static int get_channel_offsets(struct dev_context *devc)
-{
- GString *gs;
- int chan, v, ret;
-
- sr_dbg("hantek-dso: getting channel offsets");
-
- ret = libusb_control_transfer(devc->usb->devhdl,
- LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_VENDOR,
- CTRL_READ_EEPROM, EEPROM_CHANNEL_OFFSETS, 0,
- (unsigned char *)&devc->channel_levels,
- sizeof(devc->channel_levels), 200);
- if (ret != sizeof(devc->channel_levels)) {
- sr_err("failed to get channel offsets: %d", ret);
- return SR_ERR;
- }
-
- /* Comes in as 16-bit numbers with the second byte always 0 on
- * the DSO-2090. Guessing this is supposed to be big-endian,
- * since that's how voltage offsets are submitted back to the DSO.
- * Convert to host order now, so we can use them natively.
- */
- for (chan = 0; chan < 2; chan++) {
- for (v = 0; v < 9; v++) {
- devc->channel_levels[chan][v][0] = g_ntohs(devc->channel_levels[chan][v][0]);
- devc->channel_levels[chan][v][1] = g_ntohs(devc->channel_levels[chan][v][1]);
- }
- }
-
- if (sr_log_loglevel_get() >= SR_LOG_DBG) {
- gs = g_string_sized_new(128);
- for (chan = 0; chan < 2; chan++) {
- g_string_printf(gs, "hantek-dso: CH%d:", chan + 1);
- for (v = 0; v < 9; v++) {
- g_string_append_printf(gs, " %.4x-%.4x",
- devc->channel_levels[chan][v][0],
- devc->channel_levels[chan][v][1]);
- }
- sr_dbg(gs->str);
- }
- g_string_free(gs, TRUE);
- }
-
- return SR_OK;
-}
-
-SR_PRIV int dso_set_trigger_samplerate(struct dev_context *devc)
-{
- int ret, tmp;
- uint8_t cmdstring[12];
- uint16_t timebase_small[] = { 0xffff, 0xfffc, 0xfff7, 0xffe8, 0xffce,
- 0xff9c, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79, 0xd8f1 };
- uint16_t timebase_large[] = { 0xffff, 0x0000, 0xfffc, 0xfff7, 0xffe8,
- 0xffce, 0xff9d, 0xff07, 0xfe0d, 0xfc19, 0xf63d, 0xec79 };
-
- sr_dbg("hantek-dso: preparing CMD_SET_TRIGGER_SAMPLERATE");
-
- memset(cmdstring, 0, sizeof(cmdstring));
- /* Command */
- cmdstring[0] = CMD_SET_TRIGGER_SAMPLERATE;
-
- /* Trigger source */
- sr_dbg("hantek-dso: trigger source %s", devc->triggersource);
- if (!strcmp("CH2", devc->triggersource))
- tmp = 0;
- else if (!strcmp("CH1", devc->triggersource))
- tmp = 1;
- else if (!strcmp("EXT", devc->triggersource))
- tmp = 2;
- else {
- sr_err("hantek-dso: invalid trigger source %s", devc->triggersource);
- return SR_ERR_ARG;
- }
- cmdstring[2] = tmp;
-
- /* Frame size */
- sr_dbg("hantek-dso: frame size %d", devc->framesize);
- cmdstring[2] |= (devc->framesize == FRAMESIZE_SMALL ? 0x01 : 0x02) << 2;
-
- /* Timebase fast */
- sr_dbg("hantek-dso: time base index %d", devc->timebase);
- switch (devc->framesize) {
- case FRAMESIZE_SMALL:
- if (devc->timebase < TIME_20us)
- tmp = 0;
- else if (devc->timebase == TIME_20us)
- tmp = 1;
- else if (devc->timebase == TIME_40us)
- tmp = 2;
- else if (devc->timebase == TIME_100us)
- tmp = 3;
- else if (devc->timebase >= TIME_200us)
- tmp = 4;
- break;
- case FRAMESIZE_LARGE:
- if (devc->timebase < TIME_40us) {
- sr_err("hantek-dso: timebase < 40us only supported with 10K buffer");
- return SR_ERR_ARG;
- }
- else if (devc->timebase == TIME_40us)
- tmp = 0;
- else if (devc->timebase == TIME_100us)
- tmp = 2;
- else if (devc->timebase == TIME_200us)
- tmp = 3;
- else if (devc->timebase >= TIME_400us)
- tmp = 4;
- break;
- }
- cmdstring[2] |= (tmp & 0x07) << 5;
-
- /* Enabled channels: 00=CH1 01=CH2 10=both */
- sr_dbg("hantek-dso: channels CH1=%d CH2=%d", devc->ch1_enabled, devc->ch2_enabled);
- tmp = (((devc->ch2_enabled ? 1 : 0) << 1) + (devc->ch1_enabled ? 1 : 0)) - 1;
- cmdstring[3] = tmp;
-
- /* Fast rates channel */
- /* TODO: is this right? */
- tmp = devc->timebase < TIME_10us ? 1 : 0;
- cmdstring[3] |= tmp << 2;
-
- /* Trigger slope: 0=positive 1=negative */
- /* TODO: does this work? */
- sr_dbg("hantek-dso: trigger slope %d", devc->triggerslope);
- cmdstring[3] |= (devc->triggerslope == SLOPE_NEGATIVE ? 1 : 0) << 3;
-
- /* Timebase slow */
- if (devc->timebase < TIME_100us)
- tmp = 0;
- else if (devc->timebase > TIME_400ms)
- tmp = 0xffed;
- else {
- if (devc->framesize == FRAMESIZE_SMALL)
- tmp = timebase_small[devc->timebase - 3];
- else
- tmp = timebase_large[devc->timebase - 3];
- }
- cmdstring[4] = tmp & 0xff;
- cmdstring[5] = (tmp >> 8) & 0xff;
-
- /* Horizontal trigger position */
- sr_dbg("hantek-dso: trigger position %3.2f", devc->triggerposition);
- tmp = 0x77fff + 0x8000 * devc->triggerposition;
- cmdstring[6] = tmp & 0xff;
- cmdstring[7] = (tmp >> 8) & 0xff;
- cmdstring[10] = (tmp >> 16) & 0xff;
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, sizeof(cmdstring),
- &tmp, 100)) != 0) {
- sr_err("Failed to set trigger/samplerate: %d", ret);
- return SR_ERR;
- }
- sr_dbg("hantek-dso: sent CMD_SET_TRIGGER_SAMPLERATE");
-
- return SR_OK;
-}
-
-SR_PRIV int dso_set_filters(struct dev_context *devc)
-{
- int ret, tmp;
- uint8_t cmdstring[8];
-
- sr_dbg("hantek-dso: preparing CMD_SET_FILTERS");
-
- memset(cmdstring, 0, sizeof(cmdstring));
- cmdstring[0] = CMD_SET_FILTERS;
- cmdstring[1] = 0x0f;
- if (devc->filter_ch1) {
- sr_dbg("hantek-dso: turning on CH1 filter");
- cmdstring[2] |= 0x80;
- }
- if (devc->filter_ch2) {
- sr_dbg("hantek-dso: turning on CH2 filter");
- cmdstring[2] |= 0x40;
- }
- if (devc->filter_trigger) {
- /* TODO: supported on the DSO-2090? */
- sr_dbg("hantek-dso: turning on trigger filter");
- cmdstring[2] |= 0x20;
- }
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, sizeof(cmdstring),
- &tmp, 100)) != 0) {
- sr_err("Failed to set filters: %d", ret);
- return SR_ERR;
- }
- sr_dbg("hantek-dso: sent CMD_SET_FILTERS");
-
- return SR_OK;
-}
-
-SR_PRIV int dso_set_voltage(struct dev_context *devc)
-{
- int ret, tmp;
- uint8_t cmdstring[8];
-
- sr_dbg("hantek-dso: preparing CMD_SET_VOLTAGE");
-
- memset(cmdstring, 0, sizeof(cmdstring));
- cmdstring[0] = CMD_SET_VOLTAGE;
- cmdstring[1] = 0x0f;
- cmdstring[2] = 0x30;
-
- /* CH1 volts/div is encoded in bits 0-1 */
- sr_dbg("hantek-dso: CH1 vdiv index %d", devc->voltage_ch1);
- switch (devc->voltage_ch1) {
- case VDIV_1V:
- case VDIV_100MV:
- case VDIV_10MV:
- cmdstring[2] |= 0x00;
- break;
- case VDIV_2V:
- case VDIV_200MV:
- case VDIV_20MV:
- cmdstring[2] |= 0x01;
- break;
- case VDIV_5V:
- case VDIV_500MV:
- case VDIV_50MV:
- cmdstring[2] |= 0x02;
- break;
- }
-
- /* CH2 volts/div is encoded in bits 2-3 */
- sr_dbg("hantek-dso: CH2 vdiv index %d", devc->voltage_ch2);
- switch (devc->voltage_ch2) {
- case VDIV_1V:
- case VDIV_100MV:
- case VDIV_10MV:
- cmdstring[2] |= 0x00;
- break;
- case VDIV_2V:
- case VDIV_200MV:
- case VDIV_20MV:
- cmdstring[2] |= 0x04;
- break;
- case VDIV_5V:
- case VDIV_500MV:
- case VDIV_50MV:
- cmdstring[2] |= 0x08;
- break;
- }
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, sizeof(cmdstring),
- &tmp, 100)) != 0) {
- sr_err("Failed to set voltage: %d", ret);
- return SR_ERR;
- }
- sr_dbg("hantek-dso: sent CMD_SET_VOLTAGE");
-
- return SR_OK;
-}
-
-SR_PRIV int dso_set_relays(struct dev_context *devc)
-{
- GString *gs;
- int ret, i;
- uint8_t relays[17] = { 0x00, 0x04, 0x08, 0x02, 0x20, 0x40, 0x10, 0x01,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-
- sr_dbg("hantek-dso: preparing CTRL_SETRELAYS");
-
- if (devc->voltage_ch1 < VDIV_1V)
- relays[1] = ~relays[1];
-
- if (devc->voltage_ch1 < VDIV_100MV)
- relays[2] = ~relays[2];
-
- sr_dbg("hantek-dso: CH1 coupling %d", devc->coupling_ch1);
- if (devc->coupling_ch1 != COUPLING_AC)
- relays[3] = ~relays[3];
-
- if (devc->voltage_ch2 < VDIV_1V)
- relays[4] = ~relays[4];
-
- if (devc->voltage_ch2 < VDIV_100MV)
- relays[5] = ~relays[5];
-
- sr_dbg("hantek-dso: CH2 coupling %d", devc->coupling_ch1);
- if (devc->coupling_ch2 != COUPLING_AC)
- relays[6] = ~relays[6];
-
- if (!strcmp(devc->triggersource, "EXT"))
- relays[7] = ~relays[7];
-
- if (sr_log_loglevel_get() >= SR_LOG_DBG) {
- gs = g_string_sized_new(128);
- g_string_printf(gs, "hantek-dso: relays:");
- for (i = 0; i < 17; i++)
- g_string_append_printf(gs, " %.2x", relays[i]);
- sr_dbg(gs->str);
- g_string_free(gs, TRUE);
- }
-
- if ((ret = libusb_control_transfer(devc->usb->devhdl,
- LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETRELAYS,
- 0, 0, relays, 17, 100)) != sizeof(relays)) {
- sr_err("failed to set relays: %d", ret);
- return SR_ERR;
- }
- sr_dbg("hantek-dso: sent CTRL_SETRELAYS");
-
- return SR_OK;
-}
-
-SR_PRIV int dso_set_voffsets(struct dev_context *devc)
-{
- int offset, ret;
- uint16_t *ch_levels;
- uint8_t offsets[17];
-
- sr_dbg("hantek-dso: preparing CTRL_SETOFFSET");
-
- memset(offsets, 0, sizeof(offsets));
- /* Channel 1 */
- ch_levels = devc->channel_levels[0][devc->voltage_ch1];
- offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch1 + ch_levels[0];
- offsets[0] = (offset >> 8) | 0x20;
- offsets[1] = offset & 0xff;
- sr_dbg("hantek-dso: CH1 offset %3.2f (%.2x%.2x)", devc->voffset_ch1,
- offsets[0], offsets[1]);
-
- /* Channel 2 */
- ch_levels = devc->channel_levels[1][devc->voltage_ch2];
- offset = (ch_levels[1] - ch_levels[0]) * devc->voffset_ch2 + ch_levels[0];
- offsets[2] = (offset >> 8) | 0x20;
- offsets[3] = offset & 0xff;
- sr_dbg("hantek-dso: CH2 offset %3.2f (%.2x%.2x)", devc->voffset_ch2,
- offsets[2], offsets[3]);
-
- /* Trigger */
- offset = MAX_VERT_TRIGGER * devc->voffset_trigger;
- offsets[4] = (offset >> 8) | 0x20;
- offsets[5] = offset & 0xff;
- sr_dbg("hantek-dso: trigger offset %3.2f (%.2x%.2x)", devc->voffset_trigger,
- offsets[4], offsets[5]);
-
- if ((ret = libusb_control_transfer(devc->usb->devhdl,
- LIBUSB_REQUEST_TYPE_VENDOR, CTRL_SETOFFSET,
- 0, 0, offsets, sizeof(offsets), 100)) != sizeof(offsets)) {
- sr_err("failed to set offsets: %d", ret);
- return SR_ERR;
- }
- sr_dbg("hantek-dso: sent CTRL_SETOFFSET");
-
- return SR_OK;
-}
-
-SR_PRIV int dso_enable_trigger(struct dev_context *devc)
-{
- int ret, tmp;
- uint8_t cmdstring[2];
-
- sr_dbg("hantek-dso: sending CMD_ENABLE_TRIGGER");
-
- memset(cmdstring, 0, sizeof(cmdstring));
- cmdstring[0] = CMD_ENABLE_TRIGGER;
- cmdstring[1] = 0x00;
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, sizeof(cmdstring),
- &tmp, 100)) != 0) {
- sr_err("Failed to enable trigger: %d", ret);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int dso_force_trigger(struct dev_context *devc)
-{
- int ret, tmp;
- uint8_t cmdstring[2];
-
- sr_dbg("hantek-dso: sending CMD_FORCE_TRIGGER");
-
- memset(cmdstring, 0, sizeof(cmdstring));
- cmdstring[0] = CMD_FORCE_TRIGGER;
- cmdstring[1] = 0x00;
-
- if (send_begin(devc) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_OUT | LIBUSB_ENDPOINT_OUT,
- cmdstring, sizeof(cmdstring),
- &tmp, 100)) != 0) {
- sr_err("Failed to force trigger: %d", ret);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int dso_init(struct dev_context *devc)
-{
-
- sr_dbg("hantek-dso: initializing dso");
-
- if (get_channel_offsets(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_set_trigger_samplerate(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_set_filters(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_set_voltage(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_set_relays(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_set_voffsets(devc) != SR_OK)
- return SR_ERR;
-
- if (dso_enable_trigger(devc) != SR_OK)
- return SR_ERR;
-
- return SR_OK;
-}
-
-SR_PRIV int dso_get_capturestate(struct dev_context *devc, uint8_t *capturestate,
- uint32_t *trigger_offset)
-{
- int ret, tmp, i;
- unsigned int bitvalue, toff;
- uint8_t cmdstring[2], inbuf[512];
-
- sr_dbg("hantek-dso: sending CMD_GET_CAPTURESTATE");
-
- cmdstring[0] = CMD_GET_CAPTURESTATE;
- cmdstring[1] = 0;
-
- if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
- sr_dbg("Failed to send get_capturestate command: %d", ret);
- return SR_ERR;
- }
-
- if ((ret = libusb_bulk_transfer(devc->usb->devhdl,
- DSO_EP_IN | LIBUSB_ENDPOINT_IN,
- inbuf, 512, &tmp, 100)) != 0) {
- sr_dbg("Failed to get capturestate: %d", ret);
- return SR_ERR;
- }
- *capturestate = inbuf[0];
- toff = (inbuf[1] << 16) | (inbuf[3] << 8) | inbuf[2];
-
- /* This conversion comes from the openhantek project.
- * Each set bit in the 24-bit value inverts all bits with a lower
- * value. No idea why the device reports the trigger point this way.
- */
- bitvalue = 1;
- for (i = 0; i < 24; i++) {
- /* Each set bit inverts all bits with a lower value. */
- if(toff & bitvalue)
- toff ^= bitvalue - 1;
- bitvalue <<= 1;
- }
- *trigger_offset = toff;
-
- return SR_OK;
-}
-
-SR_PRIV int dso_capture_start(struct dev_context *devc)
-{
- int ret;
- uint8_t cmdstring[2];
-
- sr_dbg("hantek-dso: sending CMD_CAPTURE_START");
-
- cmdstring[0] = CMD_CAPTURE_START;
- cmdstring[1] = 0;
-
- if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
- sr_err("Failed to send capture_start command: %d", ret);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int dso_get_channeldata(struct dev_context *devc, libusb_transfer_cb_fn cb)
-{
- struct libusb_transfer *transfer;
- int num_transfers, ret, i;
- uint8_t cmdstring[2];
- unsigned char *buf;
-
- sr_dbg("hantek-dso: sending CMD_GET_CHANNELDATA");
-
- cmdstring[0] = CMD_GET_CHANNELDATA;
- cmdstring[1] = 0;
-
- if ((ret = send_bulkcmd(devc, cmdstring, sizeof(cmdstring))) != SR_OK) {
- sr_err("Failed to get channel data: %d", ret);
- return SR_ERR;
- }
-
- /* TODO: dso-2xxx only */
- num_transfers = devc->framesize * sizeof(unsigned short) / devc->epin_maxpacketsize;
- sr_dbg("hantek-dso: queueing up %d transfers", num_transfers);
- for (i = 0; i < num_transfers; i++) {
- if (!(buf = g_try_malloc(devc->epin_maxpacketsize))) {
- sr_err("hantek-dso: %s: buf malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
- transfer = libusb_alloc_transfer(0);
- libusb_fill_bulk_transfer(transfer, devc->usb->devhdl,
- DSO_EP_IN | LIBUSB_ENDPOINT_IN, buf,
- devc->epin_maxpacketsize, cb, devc, 40);
- if ((ret = libusb_submit_transfer(transfer)) != 0) {
- sr_err("failed to submit transfer: %d", ret);
- /* TODO: Free them all. */
- libusb_free_transfer(transfer);
- g_free(buf);
- return SR_ERR;
- }
- }
-
- return SR_OK;
-}
-