263 lines
6.6 KiB
C
263 lines
6.6 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2015 Uwe Hermann <uwe@hermann-uwe.de>
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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 2 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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <config.h>
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#include <glib.h>
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#include <libsigrok/libsigrok.h>
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#include "libsigrok-internal.h"
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#include "protocol.h"
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static const uint32_t scanopts[] = {
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SR_CONF_CONN,
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SR_CONF_SERIALCOMM,
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};
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static const uint32_t devopts[] = {
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SR_CONF_SCALE,
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SR_CONF_CONTINUOUS,
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SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
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SR_CONF_LIMIT_MSEC | SR_CONF_SET,
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};
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static int dev_clear(const struct sr_dev_driver *di)
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{
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return std_dev_clear(di, NULL);
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}
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static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
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{
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return std_init(sr_ctx, di, LOG_PREFIX);
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}
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static GSList *scan(struct sr_dev_driver *di, GSList *options)
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{
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struct scale_info *scale;
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struct sr_config *src;
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GSList *l, *devices;
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const char *conn, *serialcomm;
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struct sr_dev_inst *sdi;
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struct drv_context *drvc;
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struct dev_context *devc;
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struct sr_serial_dev_inst *serial;
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int ret;
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size_t len;
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uint8_t buf[128];
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scale = (struct scale_info *)di;
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conn = serialcomm = NULL;
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for (l = options; l; l = l->next) {
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src = l->data;
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switch (src->key) {
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case SR_CONF_CONN:
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conn = g_variant_get_string(src->data, NULL);
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break;
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case SR_CONF_SERIALCOMM:
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serialcomm = g_variant_get_string(src->data, NULL);
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break;
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}
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}
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if (!conn)
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return NULL;
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if (!serialcomm)
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serialcomm = scale->conn;
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serial = sr_serial_dev_inst_new(conn, serialcomm);
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if (serial_open(serial, SERIAL_RDWR) != SR_OK)
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return NULL;
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sr_info("Probing serial port %s.", conn);
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drvc = di->context;
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devices = NULL;
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serial_flush(serial);
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sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
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if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
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goto scan_cleanup;
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/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
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/* Let's get a bit of data and see if we can find a packet. */
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len = sizeof(buf);
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ret = serial_stream_detect(serial, buf, &len, scale->packet_size,
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scale->packet_valid, 3000, scale->baudrate);
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if (ret != SR_OK)
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goto scan_cleanup;
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sr_info("Found device on port %s.", conn);
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sdi = g_malloc0(sizeof(struct sr_dev_inst));
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sdi->status = SR_ST_INACTIVE;
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sdi->vendor = g_strdup(scale->vendor);
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sdi->model = g_strdup(scale->device);
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devc = g_malloc0(sizeof(struct dev_context));
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sdi->inst_type = SR_INST_SERIAL;
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sdi->conn = serial;
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sdi->priv = devc;
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sdi->driver = di;
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sr_channel_new(sdi, 0, SR_CHANNEL_ANALOG, TRUE, "Mass");
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drvc->instances = g_slist_append(drvc->instances, sdi);
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devices = g_slist_append(devices, sdi);
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scan_cleanup:
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serial_close(serial);
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return devices;
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}
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static GSList *dev_list(const struct sr_dev_driver *di)
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{
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return ((struct drv_context *)(di->context))->instances;
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}
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static int cleanup(const struct sr_dev_driver *di)
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{
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return dev_clear(di);
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}
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static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
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const struct sr_channel_group *cg)
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{
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struct dev_context *devc;
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(void)cg;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR_DEV_CLOSED;
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if (!(devc = sdi->priv))
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return SR_ERR_BUG;
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switch (key) {
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case SR_CONF_LIMIT_SAMPLES:
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devc->limit_samples = g_variant_get_uint64(data);
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break;
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case SR_CONF_LIMIT_MSEC:
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devc->limit_msec = g_variant_get_uint64(data);
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break;
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default:
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return SR_ERR_NA;
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}
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return SR_OK;
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}
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static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
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const struct sr_channel_group *cg)
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{
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(void)sdi;
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(void)cg;
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switch (key) {
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case SR_CONF_SCAN_OPTIONS:
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*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
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scanopts, ARRAY_SIZE(scanopts), sizeof(uint32_t));
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break;
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case SR_CONF_DEVICE_OPTIONS:
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*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
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devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
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break;
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default:
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return SR_ERR_NA;
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}
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return SR_OK;
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}
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static int dev_acquisition_start(const struct sr_dev_inst *sdi)
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{
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struct dev_context *devc;
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struct sr_serial_dev_inst *serial;
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if (sdi->status != SR_ST_ACTIVE)
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return SR_ERR_DEV_CLOSED;
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devc = sdi->priv;
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serial = sdi->conn;
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sr_spew("Set O1 mode (continuous values, stable and unstable ones).");
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if (serial_write_nonblocking(serial, "O1\r\n", 4) != 4)
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return SR_ERR;
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/* Device replies with "A00\r\n" (OK) or "E01\r\n" (Error). Ignore. */
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devc->num_samples = 0;
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devc->starttime = g_get_monotonic_time();
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std_session_send_df_header(sdi, LOG_PREFIX);
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/* Poll every 50ms, or whenever some data comes in. */
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serial_source_add(sdi->session, serial, G_IO_IN, 50,
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kern_scale_receive_data, (void *)sdi);
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return SR_OK;
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}
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static int dev_acquisition_stop(struct sr_dev_inst *sdi)
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{
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return std_serial_dev_acquisition_stop(sdi, std_serial_dev_close,
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sdi->conn, LOG_PREFIX);
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}
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#define SCALE(ID, CHIPSET, VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \
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VALID, PARSE) \
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&(struct scale_info) { \
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{ \
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.name = ID, \
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.longname = VENDOR " " MODEL, \
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.api_version = 1, \
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.init = init, \
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.cleanup = cleanup, \
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.scan = scan, \
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.dev_list = dev_list, \
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.dev_clear = dev_clear, \
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.config_get = NULL, \
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.config_set = config_set, \
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.config_list = config_list, \
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.dev_open = std_serial_dev_open, \
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.dev_close = std_serial_dev_close, \
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.dev_acquisition_start = dev_acquisition_start, \
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.dev_acquisition_stop = dev_acquisition_stop, \
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.context = NULL, \
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}, \
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VENDOR, MODEL, CONN, BAUDRATE, PACKETSIZE, \
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VALID, PARSE, sizeof(struct CHIPSET##_info) \
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}
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/*
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* Some scales have (user-configurable) 14-byte or 15-byte packets.
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* We transparently support both variants by specifying the larger value
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* below and due to the way the stream parser works.
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*
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* The scales have a standard baudrate (model dependent) as listed below,
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* but serial parameters are user-configurable. We support that by letting
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* the user override them via "serialcomm".
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*/
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SR_PRIV const struct scale_info *kern_scale_drivers[] = {
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SCALE(
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"kern-ew-6200-2nm", kern,
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"KERN", "EW 6200-2NM", "1200/8n2", 1200,
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15 /* (or 14) */, sr_kern_packet_valid, sr_kern_parse
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),
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NULL
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};
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