fluke-dmm: flesh out the driver API

diff --git a/hardware/fluke-dmm/api.c b/hardware/fluke-dmm/api.c
index f39754be4ffe8f23b302cf0d45ee44e27e73e818..d5972bfbfa5358f243a9fa70f8319bea1be44c21 100644 (file)
--- a/hardware/fluke-dmm/api.c
+++ b/hardware/fluke-dmm/api.c
@@ -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;
+       if (!(devc = sdi->priv)) {
+               sr_err("fluke-dmm: sdi->priv was NULL.");
+               return SR_ERR_BUG;
+       }
+
        switch (hwcap) {
-       /* TODO */
+       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:
-               ret = SR_ERR_ARG;
+               sr_err("fluke-dmm: Unknown capability: %d.", hwcap);
+               return SR_ERR;
+               break;
        }
 
-       return ret;
+       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;
+
+       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);
 
-       /* TODO */
+       /* 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;
 }