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libsigrok/hardware/serial-dmm/api.c

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/*
* This file is part of the sigrok project.
*
* Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
* Copyright (C) 2012 Alexandru Gagniuc <mr.nuke.me@gmail.com>
* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <glib.h>
#include "libsigrok.h"
#include "libsigrok-internal.h"
#include "protocol.h"
static const int32_t hwopts[] = {
SR_CONF_CONN,
SR_CONF_SERIALCOMM,
};
static const int32_t hwcaps[] = {
SR_CONF_MULTIMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_LIMIT_MSEC,
SR_CONF_CONTINUOUS,
};
SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
SR_PRIV struct sr_dev_driver metex_me31_driver_info;
SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
SR_PRIV struct sr_dev_driver va_va18b_driver_info;
SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
SR_PRIV struct dmm_info dmms[] = {
{
"Digitek", "DT4000ZC", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
dmm_details_dt4000zc,
&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
},
{
"TekPower", "TP4000ZC", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
dmm_details_tp4000zc,
&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
},
{
"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&metex_me31_driver_info, receive_data_METEX_ME31,
},
{
"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
},
{
"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
},
{
"V&A", "VA18B", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
dmm_details_va18b,
&va_va18b_driver_info, receive_data_VA_VA18B,
},
{
"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&metex_m3640d_driver_info, receive_data_METEX_M3640D,
},
{
"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
},
{
"PCE", "PCE-DM32", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
dmm_details_pce_dm32,
&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
},
{
"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
},
{
"RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
},
{
"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
RS9LCD_PACKET_SIZE, NULL,
sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
NULL,
&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
},
{
"Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
NULL,
&voltcraft_vc820_ser_driver_info,
receive_data_VOLTCRAFT_VC820_SER,
},
{
"Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
NULL,
&voltcraft_vc840_ser_driver_info,
receive_data_VOLTCRAFT_VC840_SER,
},
{
/* Note: ES51922 baudrate is actually 19230! */
"UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
19200, ES51922_PACKET_SIZE, NULL,
sr_es51922_packet_valid, sr_es51922_parse, NULL,
&uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
},
};
/* Properly close and free all devices. */
static int clear_instances(int dmm)
{
struct sr_dev_inst *sdi;
struct drv_context *drvc;
struct dev_context *devc;
GSList *l;
struct sr_dev_driver *di;
di = dmms[dmm].di;
if (!(drvc = di->priv))
return SR_OK;
drvc = di->priv;
for (l = drvc->instances; l; l = l->next) {
if (!(sdi = l->data))
continue;
if (!(devc = sdi->priv))
continue;
sr_serial_dev_inst_free(devc->serial);
sr_dev_inst_free(sdi);
}
g_slist_free(drvc->instances);
drvc->instances = NULL;
return SR_OK;
}
static int hw_init(struct sr_context *sr_ctx, int dmm)
{
sr_dbg("Selected '%s' subdriver.", dmms[dmm].di->name);
return std_hw_init(sr_ctx, dmms[dmm].di, DRIVER_LOG_DOMAIN);
}
static GSList *scan(const char *conn, const char *serialcomm, int dmm)
{
struct sr_dev_inst *sdi;
struct drv_context *drvc;
struct dev_context *devc;
struct sr_probe *probe;
struct sr_serial_dev_inst *serial;
GSList *devices;
int dropped, ret;
size_t len;
uint8_t buf[128];
if (!(serial = sr_serial_dev_inst_new(conn, serialcomm)))
return NULL;
if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return NULL;
sr_info("Probing serial port %s.", conn);
drvc = dmms[dmm].di->priv;
devices = NULL;
serial_flush(serial);
/* Request a packet if the DMM requires this. */
if (dmms[dmm].packet_request) {
if ((ret = dmms[dmm].packet_request(serial)) < 0) {
sr_err("Failed to request packet: %d.", ret);
return FALSE;
}
}
/*
* There's no way to get an ID from the multimeter. It just sends data
* periodically (or upon request), so the best we can do is check if
* the packets match the expected format.
*/
/* Let's get a bit of data and see if we can find a packet. */
len = sizeof(buf);
ret = serial_stream_detect(serial, buf, &len, dmms[dmm].packet_size,
dmms[dmm].packet_valid, 1000,
dmms[dmm].baudrate);
if (ret != SR_OK)
goto scan_cleanup;
/*
* If we dropped more than two packets worth of data, something is
* wrong. We shouldn't quit however, since the dropped bytes might be
* just zeroes at the beginning of the stream. Those can occur as a
* combination of the nonstandard cable that ships with some devices
* and the serial port or USB to serial adapter.
*/
dropped = len - dmms[dmm].packet_size;
if (dropped > 2 * dmms[dmm].packet_size)
sr_warn("Had to drop too much data.");
sr_info("Found device on port %s.", conn);
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, dmms[dmm].vendor,
dmms[dmm].device, "")))
goto scan_cleanup;
if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
sr_err("Device context malloc failed.");
goto scan_cleanup;
}
devc->serial = serial;
sdi->priv = devc;
sdi->driver = dmms[dmm].di;
if (!(probe = sr_probe_new(0, SR_PROBE_ANALOG, TRUE, "P1")))
goto scan_cleanup;
sdi->probes = g_slist_append(sdi->probes, probe);
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
scan_cleanup:
serial_close(serial);
return devices;
}
static GSList *hw_scan(GSList *options, int dmm)
{
struct sr_config *src;
GSList *l, *devices;
const char *conn, *serialcomm;
conn = serialcomm = NULL;
for (l = options; l; l = l->next) {
src = l->data;
switch (src->key) {
case SR_CONF_CONN:
conn = g_variant_get_string(src->data, NULL);
break;
case SR_CONF_SERIALCOMM:
serialcomm = g_variant_get_string(src->data, NULL);
break;
}
}
if (!conn)
return NULL;
if (serialcomm) {
/* Use the provided comm specs. */
devices = scan(conn, serialcomm, dmm);
} else {
/* Try the default. */
devices = scan(conn, dmms[dmm].conn, dmm);
}
return devices;
}
static GSList *hw_dev_list(int dmm)
{
return ((struct drv_context *)(dmms[dmm].di->priv))->instances;
}
static int hw_dev_open(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
if (serial_open(devc->serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
return SR_ERR;
sdi->status = SR_ST_ACTIVE;
return SR_OK;
}
static int hw_dev_close(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
devc = sdi->priv;
if (devc->serial && devc->serial->fd != -1) {
serial_close(devc->serial);
sdi->status = SR_ST_INACTIVE;
}
return SR_OK;
}
static int hw_cleanup(int dmm)
{
clear_instances(dmm);
return SR_OK;
}
static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
{
struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
switch (id) {
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
sr_dbg("Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
case SR_CONF_LIMIT_MSEC:
devc->limit_msec = g_variant_get_uint64(data);
sr_dbg("Setting time limit to %" PRIu64 "ms.",
devc->limit_msec);
break;
default:
return SR_ERR_NA;
}
return SR_OK;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
(void)sdi;
switch (key) {
case SR_CONF_SCAN_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
break;
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
default:
return SR_ERR_NA;
}
return SR_OK;
}
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data, int dmm)
{
struct dev_context *devc;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
devc->cb_data = cb_data;
/*
* Reset the number of samples to take. If we've already collected our
* quota, but we start a new session, and don't reset this, we'll just
* quit without acquiring any new samples.
*/
devc->num_samples = 0;
devc->starttime = g_get_monotonic_time();
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
/* Poll every 50ms, or whenever some data comes in. */
sr_source_add(devc->serial->fd, G_IO_IN, 50,
dmms[dmm].receive_data, (void *)sdi);
return SR_OK;
}
static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
return std_hw_dev_acquisition_stop_serial(sdi, cb_data, hw_dev_close,
((struct dev_context *)(sdi->priv))->serial, DRIVER_LOG_DOMAIN);
}
/* Driver-specific API function wrappers */
#define HW_INIT(X) \
static int hw_init_##X(struct sr_context *sr_ctx) { return hw_init(sr_ctx, X); }
#define HW_CLEANUP(X) \
static int hw_cleanup_##X(void) { return hw_cleanup(X); }
#define HW_SCAN(X) \
static GSList *hw_scan_##X(GSList *options) { return hw_scan(options, X); }
#define HW_DEV_LIST(X) \
static GSList *hw_dev_list_##X(void) { return hw_dev_list(X); }
#define CLEAR_INSTANCES(X) \
static int clear_instances_##X(void) { return clear_instances(X); }
#define HW_DEV_ACQUISITION_START(X) \
static int hw_dev_acquisition_start_##X(const struct sr_dev_inst *sdi, \
void *cb_data) { return hw_dev_acquisition_start(sdi, cb_data, X); }
/* Driver structs and API function wrappers */
#define DRV(ID, ID_UPPER, NAME, LONGNAME) \
HW_INIT(ID_UPPER) \
HW_CLEANUP(ID_UPPER) \
HW_SCAN(ID_UPPER) \
HW_DEV_LIST(ID_UPPER) \
CLEAR_INSTANCES(ID_UPPER) \
HW_DEV_ACQUISITION_START(ID_UPPER) \
SR_PRIV struct sr_dev_driver ID##_driver_info = { \
.name = NAME, \
.longname = LONGNAME, \
.api_version = 1, \
.init = hw_init_##ID_UPPER, \
.cleanup = hw_cleanup_##ID_UPPER, \
.scan = hw_scan_##ID_UPPER, \
.dev_list = hw_dev_list_##ID_UPPER, \
.dev_clear = clear_instances_##ID_UPPER, \
.config_get = NULL, \
.config_set = config_set, \
.config_list = config_list, \
.dev_open = hw_dev_open, \
.dev_close = hw_dev_close, \
.dev_acquisition_start = hw_dev_acquisition_start_##ID_UPPER, \
.dev_acquisition_stop = hw_dev_acquisition_stop, \
.priv = NULL, \
};
DRV(digitek_dt4000zc, DIGITEK_DT4000ZC, "digitek-dt4000zc", "Digitek DT4000ZC")
DRV(tekpower_tp4000zc, TEKPOWER_TP4000ZC, "tekpower-tp4000zc", "TekPower TP4000ZC")
DRV(metex_me31, METEX_ME31, "metex-me31", "Metex ME-31")
DRV(peaktech_3410, PEAKTECH_3410, "peaktech-3410", "PeakTech 3410")
DRV(mastech_mas345, MASTECH_MAS345, "mastech-mas345", "MASTECH MAS345")
DRV(va_va18b, VA_VA18B, "va-va18b", "V&A VA18B")
DRV(metex_m3640d, METEX_M3640D, "metex-m3640d", "Metex M-3640D")
DRV(peaktech_4370, PEAKTECH_4370, "peaktech-4370", "PeakTech 4370")
DRV(pce_pce_dm32, PCE_PCE_DM32, "pce-pce-dm32", "PCE PCE-DM32")
DRV(radioshack_22_168, RADIOSHACK_22_168, "radioshack-22-168", "RadioShack 22-168")
DRV(radioshack_22_805, RADIOSHACK_22_805, "radioshack-22-805", "RadioShack 22-805")
DRV(radioshack_22_812, RADIOSHACK_22_812, "radioshack-22-812", "RadioShack 22-812")
DRV(voltcraft_vc820_ser, VOLTCRAFT_VC820_SER, "voltcraft-vc820-ser", "Voltcraft VC-820 (UT-D02 cable)")
DRV(voltcraft_vc840_ser, VOLTCRAFT_VC840_SER, "voltcraft-vc840-ser", "Voltcraft VC-840 (UT-D02 cable)")
DRV(uni_t_ut61e_ser, UNI_T_UT61E_SER, "uni-t-ut61e-ser", "UNI-T UT61E (UT-D02 cable)")
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