/* * This file is part of the libsigrok project. * * Copyright (C) 2013 Bert Vermeulen * * 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 . */ #include #include #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */ #include "libsigrok.h" #include "libsigrok-internal.h" #define LOG_PREFIX "device" /** * @file * * Device handling in libsigrok. */ /** * @defgroup grp_devices Devices * * Device handling in libsigrok. * * @{ */ /** @private * Allocate and initialize new struct sr_channel * @param[in] index @copydoc sr_channel::index * @param[in] type @copydoc sr_channel::type * @param[in] enabled @copydoc sr_channel::enabled * @param[in] name @copydoc sr_channel::name * * @return NULL (failure) or new struct sr_channel*. */ SR_PRIV struct sr_channel *sr_channel_new(int index, int type, gboolean enabled, const char *name) { struct sr_channel *ch; if (!(ch = g_try_malloc0(sizeof(struct sr_channel)))) { sr_err("Channel malloc failed."); return NULL; } ch->index = index; ch->type = type; ch->enabled = enabled; if (name) ch->name = g_strdup(name); return ch; } /** * Set the name of the specified channel in the specified device. * * If the channel already has a different name assigned to it, it will be * removed, and the new name will be saved instead. * * @param sdi The device instance the channel is connected to. * @param[in] channelnum The number of the channel whose name to set. * Note that the channel numbers start at 0. * @param[in] name The new name that the specified channel should get. A copy * of the string is made. * * @return SR_OK on success, or SR_ERR_ARG on invalid arguments. * * @since 0.2.0 */ SR_API int sr_dev_channel_name_set(const struct sr_dev_inst *sdi, int channelnum, const char *name) { GSList *l; struct sr_channel *ch; int ret; if (!sdi) { sr_err("%s: sdi was NULL", __func__); return SR_ERR_ARG; } ret = SR_ERR_ARG; for (l = sdi->channels; l; l = l->next) { ch = l->data; if (ch->index == channelnum) { g_free(ch->name); ch->name = g_strdup(name); ret = SR_OK; break; } } return ret; } /** * Enable or disable a channel on the specified device. * * @param sdi The device instance the channel is connected to. * @param channelnum The channel number, starting from 0. * @param state TRUE to enable the channel, FALSE to disable. * * @return SR_OK on success or SR_ERR on failure. In case of invalid * arguments, SR_ERR_ARG is returned and the channel enabled state * remains unchanged. * * @since 0.2.0 */ SR_API int sr_dev_channel_enable(const struct sr_dev_inst *sdi, int channelnum, gboolean state) { GSList *l; struct sr_channel *ch; int ret; gboolean was_enabled; if (!sdi) return SR_ERR_ARG; ret = SR_ERR_ARG; for (l = sdi->channels; l; l = l->next) { ch = l->data; if (ch->index == channelnum) { was_enabled = ch->enabled; ch->enabled = state; ret = SR_OK; if (!state != !was_enabled && sdi->driver && sdi->driver->config_channel_set) { ret = sdi->driver->config_channel_set( sdi, ch, SR_CHANNEL_SET_ENABLED); /* Roll back change if it wasn't applicable. */ if (ret == SR_ERR_ARG) ch->enabled = was_enabled; } break; } } return ret; } /** * Add a trigger to the specified device (and the specified channel). * * If the specified channel of this device already has a trigger, it will * be silently replaced. * * @param[in,out] sdi Pointer to the device instance; must not be NULL. * @param[in] channelnum Number of channel, starting at 0. * @param[in] trigger Trigger string, in the format used by sigrok-cli * * @return SR_OK on success or SR_ERR on failure. In case of invalid * arguments, SR_ERR_ARG is returned and the trigger settings * remain unchanged. * * @since 0.2.0 */ SR_API int sr_dev_trigger_set(const struct sr_dev_inst *sdi, int channelnum, const char *trigger) { GSList *l; struct sr_channel *ch; char *old_trigger; int ret; if (!sdi) return SR_ERR_ARG; ret = SR_ERR_ARG; for (l = sdi->channels; l; l = l->next) { ch = l->data; if (ch->index == channelnum) { old_trigger = ch->trigger; ret = SR_OK; if (g_strcmp0(trigger, old_trigger) == 0) break; /* Set new trigger if it has changed. */ ch->trigger = g_strdup(trigger); if (sdi->driver && sdi->driver->config_channel_set) { ret = sdi->driver->config_channel_set( sdi, ch, SR_CHANNEL_SET_TRIGGER); /* Roll back change if it wasn't applicable. */ if (ret == SR_ERR_ARG) { g_free(ch->trigger); ch->trigger = old_trigger; break; } } g_free(old_trigger); break; } } return ret; } /** * Determine whether the specified device instance has the specified * capability. * * @param sdi Pointer to the device instance to be checked. Must not be NULL. * If the device's 'driver' field is NULL (virtual device), this * function will always return FALSE (virtual devices don't have * a hardware capabilities list). * @param[in] key The option that should be checked for is supported by the * specified device. * * @retval TRUE Device has the specified option * @retval FALSE Device does not have the specified option, invalid input * parameters or other error conditions. * * @since 0.2.0 */ SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key) { GVariant *gvar; const int *devopts; gsize num_opts, i; int ret; if (!sdi || !sdi->driver || !sdi->driver->config_list) return FALSE; if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS, &gvar, sdi, NULL) != SR_OK) return FALSE; ret = FALSE; devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t)); for (i = 0; i < num_opts; i++) { if (devopts[i] == key) { ret = TRUE; break; } } g_variant_unref(gvar); return ret; } /** @private * Allocate and init new device instance struct. * @param[in] index @copydoc sr_dev_inst::index * @param[in] status @copydoc sr_dev_inst::status * @param[in] vendor @copydoc sr_dev_inst::vendor * @param[in] model @copydoc sr_dev_inst::model * @param[in] version @copydoc sr_dev_inst::version * * @retval NULL Error * @retval struct sr_dev_inst *. Dynamically allocated, free using * sr_dev_inst_free(). */ SR_PRIV struct sr_dev_inst *sr_dev_inst_new(int index, int status, const char *vendor, const char *model, const char *version) { struct sr_dev_inst *sdi; if (!(sdi = g_try_malloc(sizeof(struct sr_dev_inst)))) { sr_err("Device instance malloc failed."); return NULL; } sdi->driver = NULL; sdi->index = index; sdi->status = status; sdi->inst_type = -1; sdi->vendor = vendor ? g_strdup(vendor) : NULL; sdi->model = model ? g_strdup(model) : NULL; sdi->version = version ? g_strdup(version) : NULL; sdi->channels = NULL; sdi->channel_groups = NULL; sdi->conn = NULL; sdi->priv = NULL; return sdi; } /** @private * Free device instance struct created by sr_dev_inst(). * @param sdi struct* to free. */ SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi) { struct sr_channel *ch; GSList *l; for (l = sdi->channels; l; l = l->next) { ch = l->data; g_free(ch->name); g_free(ch->trigger); g_free(ch); } g_slist_free(sdi->channels); if (sdi->channel_groups) g_slist_free(sdi->channel_groups); g_free(sdi->vendor); g_free(sdi->model); g_free(sdi->version); g_free(sdi); } #ifdef HAVE_LIBUSB_1_0 /** @private * Allocate and init struct for USB device instance. * @param[in] bus @copydoc sr_usb_dev_inst::bus * @param[in] address @copydoc sr_usb_dev_inst::address * @param[in] hdl @copydoc sr_usb_dev_inst::devhdl * * @retval NULL Error * @retval other struct sr_usb_dev_inst * for USB device instance. */ SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus, uint8_t address, struct libusb_device_handle *hdl) { struct sr_usb_dev_inst *udi; if (!(udi = g_try_malloc(sizeof(struct sr_usb_dev_inst)))) { sr_err("USB device instance malloc failed."); return NULL; } udi->bus = bus; udi->address = address; udi->devhdl = hdl; return udi; } /** @private * Free struct * allocated by sr_usb_dev_inst(). * @param usb struct* to free. Must not be NULL. */ SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb) { g_free(usb); } #endif #ifdef HAVE_LIBSERIALPORT /** * @private * * Both parameters are copied to newly allocated strings, and freed * automatically by sr_serial_dev_inst_free(). * * @param[in] port OS-specific serial port specification. Examples: * "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1". * @param[in] serialcomm A serial communication parameters string, in the form * of \/\\\, for example * "9600/8n1" or "600/7o2". This is an optional parameter; * it may be filled in later. * * @return A pointer to a newly initialized struct sr_serial_dev_inst, * or NULL on error. */ SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port, const char *serialcomm) { struct sr_serial_dev_inst *serial; if (!port) { sr_err("Serial port required."); return NULL; } if (!(serial = g_try_malloc0(sizeof(struct sr_serial_dev_inst)))) { sr_err("Serial device instance malloc failed."); return NULL; } serial->port = g_strdup(port); if (serialcomm) serial->serialcomm = g_strdup(serialcomm); return serial; } /** @private * Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst(). * @param serial struct sr_serial_dev_inst * to free. Must not be NULL. */ SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial) { g_free(serial->port); g_free(serial->serialcomm); g_free(serial); } #endif /** @private */ SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device) { struct sr_usbtmc_dev_inst *usbtmc; if (!device) { sr_err("Device name required."); return NULL; } if (!(usbtmc = g_try_malloc0(sizeof(struct sr_usbtmc_dev_inst)))) { sr_err("USBTMC device instance malloc failed."); return NULL; } usbtmc->device = g_strdup(device); usbtmc->fd = -1; return usbtmc; } /** @private */ SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc) { g_free(usbtmc->device); g_free(usbtmc); } /** * Get the list of devices/instances of the specified driver. * * @param driver The driver to use. Must not be NULL. * * @return The list of devices/instances of this driver, or NULL upon errors * or if the list is empty. * * @since 0.2.0 */ SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver) { if (driver && driver->dev_list) return driver->dev_list(); else return NULL; } /** * Clear the list of device instances a driver knows about. * * @param driver The driver to use. This must be a pointer to one of * the entries returned by sr_driver_list(). Must not be NULL. * * @retval SR_OK Success * @retval SR_ERR_ARG Invalid driver * * @since 0.2.0 */ SR_API int sr_dev_clear(const struct sr_dev_driver *driver) { int ret; if (!driver) { sr_err("Invalid driver."); return SR_ERR_ARG; } if (driver->dev_clear) ret = driver->dev_clear(); else ret = std_dev_clear(driver, NULL); return ret; } /** * Open the specified device. * * @param sdi Device instance to use. Must not be NULL. * * @return SR_OK upon success, a negative error code upon errors. * * @since 0.2.0 */ SR_API int sr_dev_open(struct sr_dev_inst *sdi) { int ret; if (!sdi || !sdi->driver || !sdi->driver->dev_open) return SR_ERR; ret = sdi->driver->dev_open(sdi); return ret; } /** * Close the specified device. * * @param sdi Device instance to use. Must not be NULL. * * @return SR_OK upon success, a negative error code upon errors. * * @since 0.2.0 */ SR_API int sr_dev_close(struct sr_dev_inst *sdi) { int ret; if (!sdi || !sdi->driver || !sdi->driver->dev_close) return SR_ERR; ret = sdi->driver->dev_close(sdi); return ret; } /** @} */