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fluke-dmm: flesh out the driver API

This commit is contained in:
Bert Vermeulen 2012-09-17 16:31:15 +02:00
parent 4129832014
commit d3f8f1415c
1 changed files with 115 additions and 16 deletions
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131
hardware/fluke-dmm/api.c
View File

@ -28,6 +28,24 @@
#include <string.h>
#include <errno.h>
static const int hwopts[] = {
SR_HWOPT_CONN,
SR_HWOPT_SERIALCOMM,
0,
};
static const int hwcaps[] = {
SR_HWCAP_MULTIMETER,
SR_HWCAP_LIMIT_SAMPLES,
SR_HWCAP_LIMIT_MSEC,
SR_HWCAP_CONTINUOUS,
0,
};
static const char *probe_names[] = {
"Probe",
NULL,
};
SR_PRIV struct sr_dev_driver flukedmm_driver_info;
static struct sr_dev_driver *di = &flukedmm_driver_info;
@ -196,7 +214,6 @@ static GSList *fluke_scan(const char *conn, const char *serialcomm)
static GSList *hw_scan(GSList *options)
{
struct sr_dev_inst *sdi;
struct sr_hwopt *opt;
GSList *l, *devices;
const char *conn, *serialcomm;
@ -265,8 +282,18 @@ static int hw_dev_open(struct sr_dev_inst *sdi)
static int hw_dev_close(struct sr_dev_inst *sdi)
{
struct dev_context *devc;
/* TODO */
if (!(devc = sdi->priv)) {
sr_err("fluke-dmm: sdi->priv was NULL.");
return SR_ERR_BUG;
}
if (devc->serial && devc->serial->fd != -1) {
serial_close(devc->serial->fd);
devc->serial->fd = -1;
sdi->status = SR_ST_INACTIVE;
}
return SR_OK;
}
@ -276,8 +303,6 @@ static int hw_cleanup(void)
clear_instances();
/* TODO */
return SR_OK;
}
@ -285,9 +310,21 @@ static int hw_info_get(int info_id, const void **data,
const struct sr_dev_inst *sdi)
{
(void)sdi;
switch (info_id) {
/* TODO */
case SR_DI_HWOPTS:
*data = hwopts;
break;
case SR_DI_HWCAPS:
*data = hwcaps;
break;
case SR_DI_NUM_PROBES:
*data = GINT_TO_POINTER(1);
break;
case SR_DI_PROBE_NAMES:
*data = probe_names;
break;
default:
return SR_ERR_ARG;
}
@ -298,26 +335,75 @@ static int hw_info_get(int info_id, const void **data,
static int hw_dev_config_set(const struct sr_dev_inst *sdi, int hwcap,
const void *value)
{
int ret;
struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR;
ret = SR_OK;
switch (hwcap) {
/* TODO */
default:
ret = SR_ERR_ARG;
if (!(devc = sdi->priv)) {
sr_err("fluke-dmm: sdi->priv was NULL.");
return SR_ERR_BUG;
}
return ret;
switch (hwcap) {
case SR_HWCAP_LIMIT_MSEC:
/* TODO: not yet implemented */
if (*(const uint64_t *)value == 0) {
sr_err("fluke-dmm: LIMIT_MSEC can't be 0.");
return SR_ERR;
}
devc->limit_msec = *(const uint64_t *)value;
sr_dbg("fluke-dmm: Setting time limit to %" PRIu64 "ms.",
devc->limit_msec);
break;
case SR_HWCAP_LIMIT_SAMPLES:
devc->limit_samples = *(const uint64_t *)value;
sr_dbg("fluke-dmm: Setting sample limit to %" PRIu64 ".",
devc->limit_samples);
break;
default:
sr_err("fluke-dmm: Unknown capability: %d.", hwcap);
return SR_ERR;
break;
}
return SR_OK;
}
static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
struct sr_datafeed_packet packet;
struct sr_datafeed_header header;
struct sr_datafeed_meta_analog meta;
struct dev_context *devc;
/* TODO */
if (!(devc = sdi->priv)) {
sr_err("fluke-dmm: sdi->priv was NULL.");
return SR_ERR_BUG;
}
sr_dbg("fluke-dmm: Starting acquisition.");
devc->cb_data = cb_data;
/* Send header packet to the session bus. */
sr_dbg("fluke-dmm: Sending SR_DF_HEADER.");
packet.type = SR_DF_HEADER;
packet.payload = (uint8_t *)&header;
header.feed_version = 1;
gettimeofday(&header.starttime, NULL);
sr_session_send(devc->cb_data, &packet);
/* Send metadata about the SR_DF_ANALOG packets to come. */
sr_dbg("fluke-dmm: Sending SR_DF_META_ANALOG.");
packet.type = SR_DF_META_ANALOG;
packet.payload = &meta;
meta.num_probes = 1;
sr_session_send(devc->cb_data, &packet);
/* Poll every 100ms, or whenever some data comes in. */
sr_source_add(devc->serial->fd, G_IO_IN, 100, fluke_receive_data, (void *)sdi);
return SR_OK;
}
@ -325,13 +411,26 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
static int hw_dev_acquisition_stop(const struct sr_dev_inst *sdi,
void *cb_data)
{
(void)cb_data;
struct sr_datafeed_packet packet;
struct dev_context *devc;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR;
/* TODO */
if (!(devc = sdi->priv)) {
sr_err("fluke-dmm: sdi->priv was NULL.");
return SR_ERR_BUG;
}
sr_dbg("fluke-dmm: Stopping acquisition.");
sr_source_remove(devc->serial->fd);
hw_dev_close((struct sr_dev_inst *)sdi);
/* Send end packet to the session bus. */
sr_dbg("fluke-dmm: Sending SR_DF_END.");
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
return SR_OK;
}