X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=blobdiff_plain;f=src%2Fscpi%2Fscpi.c;h=baf6e79f5445fe6b6e7e342c6bc750f8a597a823;hp=ac7cdb575625b9f3b0fbae47b359b4c765928329;hb=c1aae90038456a61d0f9313d34e6107c3440d3e7;hpb=7efe889e7aa5849ae3e4d09b8f50779992502b79
diff --git a/src/scpi/scpi.c b/src/scpi/scpi.c
index ac7cdb57..baf6e79f 100644
--- a/src/scpi/scpi.c
+++ b/src/scpi/scpi.c
@@ -17,16 +17,15 @@
* along with this program. If not, see .
*/
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
#include
#include
+#include
+#include "libsigrok-internal.h"
#define LOG_PREFIX "scpi"
#define SCPI_READ_RETRIES 100
-#define SCPI_READ_RETRY_TIMEOUT 10000
+#define SCPI_READ_RETRY_TIMEOUT_US (10 * 1000)
/**
* Parse a string representation of a boolean-like value into a gboolean.
@@ -71,6 +70,7 @@ SR_PRIV extern const struct sr_scpi_dev_inst scpi_tcp_rigol_dev;
SR_PRIV extern const struct sr_scpi_dev_inst scpi_usbtmc_libusb_dev;
SR_PRIV extern const struct sr_scpi_dev_inst scpi_vxi_dev;
SR_PRIV extern const struct sr_scpi_dev_inst scpi_visa_dev;
+SR_PRIV extern const struct sr_scpi_dev_inst scpi_libgpib_dev;
static const struct sr_scpi_dev_inst *scpi_devs[] = {
&scpi_tcp_raw_dev,
@@ -84,6 +84,9 @@ static const struct sr_scpi_dev_inst *scpi_devs[] = {
#ifdef HAVE_LIBREVISA
&scpi_visa_dev,
#endif
+#ifdef HAVE_LIBGPIB
+ &scpi_libgpib_dev,
+#endif
#ifdef HAVE_LIBSERIALPORT
&scpi_serial_dev, /* must be last as it matches any resource */
#endif
@@ -144,8 +147,10 @@ SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options,
for (l = resources; l; l = l->next) {
res = g_strsplit(l->data, ":", 2);
if (res[0] && (sdi = sr_scpi_scan_resource(drvc, res[0],
- serialcomm ? serialcomm : res[1], probe_device)))
+ serialcomm ? serialcomm : res[1], probe_device))) {
devices = g_slist_append(devices, sdi);
+ sdi->connection_id = g_strdup(l->data);
+ }
g_strfreev(res);
}
g_slist_free_full(resources, g_free);
@@ -153,7 +158,8 @@ SR_PRIV GSList *sr_scpi_scan(struct drv_context *drvc, GSList *options,
if (!devices && resource) {
sdi = sr_scpi_scan_resource(drvc, resource, serialcomm, probe_device);
- devices = g_slist_append(NULL, sdi);
+ if (sdi)
+ devices = g_slist_append(NULL, sdi);
}
/* Tack a copy of the newly found devices onto the driver list. */
@@ -178,6 +184,7 @@ SR_PRIV struct sr_scpi_dev_inst *scpi_dev_inst_new(struct drv_context *drvc,
scpi = g_malloc(sizeof(*scpi));
*scpi = *scpi_dev;
scpi->priv = g_malloc0(scpi->priv_size);
+ scpi->read_timeout_ms = 1000;
params = g_strsplit(resource, "/", 0);
if (scpi->dev_inst_new(scpi->priv, drvc, resource,
params, serialcomm) != SR_OK) {
@@ -375,6 +382,8 @@ SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
char buf[256];
int len;
GString *response;
+ gint64 laststart;
+ unsigned int elapsed_ms;
if (command)
if (sr_scpi_send(scpi, command) != SR_OK)
@@ -383,6 +392,8 @@ SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
if (sr_scpi_read_begin(scpi) != SR_OK)
return SR_ERR;
+ laststart = g_get_monotonic_time();
+
response = g_string_new("");
*scpi_response = NULL;
@@ -390,20 +401,33 @@ SR_PRIV int sr_scpi_get_string(struct sr_scpi_dev_inst *scpi,
while (!sr_scpi_read_complete(scpi)) {
len = sr_scpi_read_data(scpi, buf, sizeof(buf));
if (len < 0) {
+ sr_err("Incompletely read SCPI response.");
g_string_free(response, TRUE);
return SR_ERR;
+ } else if (len > 0) {
+ laststart = g_get_monotonic_time();
}
g_string_append_len(response, buf, len);
+ elapsed_ms = (g_get_monotonic_time() - laststart) / 1000;
+ if (elapsed_ms >= scpi->read_timeout_ms) {
+ sr_err("Timed out waiting for SCPI response.");
+ g_string_free(response, TRUE);
+ return SR_ERR;
+ }
}
/* Get rid of trailing linefeed if present */
if (response->len >= 1 && response->str[response->len - 1] == '\n')
g_string_truncate(response, response->len - 1);
+ /* Get rid of trailing carriage return if present */
+ if (response->len >= 1 && response->str[response->len - 1] == '\r')
+ g_string_truncate(response, response->len - 1);
+
*scpi_response = response->str;
g_string_free(response, FALSE);
- sr_spew("Got response: '%.70s'.", *scpi_response);
+ sr_spew("Got response: '%.70s', length %d.", *scpi_response, strlen(*scpi_response));
return SR_OK;
}
@@ -553,7 +577,7 @@ SR_PRIV int sr_scpi_get_opc(struct sr_scpi_dev_inst *scpi)
sr_scpi_get_bool(scpi, SCPI_CMD_OPC, &opc);
if (opc)
return SR_OK;
- g_usleep(SCPI_READ_RETRY_TIMEOUT);
+ g_usleep(SCPI_READ_RETRY_TIMEOUT_US);
}
return SR_ERR;
@@ -711,7 +735,7 @@ SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
for (num_tokens = 0; tokens[num_tokens] != NULL; num_tokens++);
- if (num_tokens != 4) {
+ if (num_tokens < 4) {
sr_dbg("IDN response not according to spec: %80.s.", response);
g_strfreev(tokens);
g_free(response);
@@ -719,12 +743,7 @@ SR_PRIV int sr_scpi_get_hw_id(struct sr_scpi_dev_inst *scpi,
}
g_free(response);
- hw_info = g_try_malloc(sizeof(struct sr_scpi_hw_info));
- if (!hw_info) {
- g_strfreev(tokens);
- return SR_ERR_MALLOC;
- }
-
+ hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
hw_info->manufacturer = g_strdup(tokens[0]);
hw_info->model = g_strdup(tokens[1]);
hw_info->serial_number = g_strdup(tokens[2]);