scpi: Add a function to read and wait on a *OPC? reply.

poljar · Nov 9, 2013 · e264e87 · e264e87
1 parent 686bd68
commit e264e87
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diff --git a/hardware/common/scpi.c b/hardware/common/scpi.c
@@ -297,6 +297,23 @@ SR_PRIV int sr_scpi_get_floatv(struct sr_serial_dev_inst *serial,
 	return ret;
 }
 
+SR_PRIV int sr_scpi_get_opc(struct sr_serial_dev_inst *serial)
+{
+	unsigned int i;
+	gboolean opc;
+
+	for (i = 0; i < SCPI_READ_RETRIES; ++i) {
+		sr_scpi_get_bool(serial, SCPI_CMD_OPC, &opc);
+
+		if (opc)
+			return SR_OK;
+
+		g_usleep(SCPI_READ_RETRY_TIMEOUT);
+	}
+
+	return SR_ERR;
+}
+
 /**
  * Send the *IDN? SCPI command, receive the reply, parse it and return the
  * reply as a sr_scpi_hw_info structure.

diff --git a/libsigrok-internal.h b/libsigrok-internal.h
@@ -234,6 +234,7 @@ SR_PRIV int sr_scpi_get_float(struct sr_serial_dev_inst *serial,
 			      const char *command, float *scpi_response);
 SR_PRIV int sr_scpi_get_floatv(struct sr_serial_dev_inst *serial,
 			      const char *command, GArray **scpi_response);
+SR_PRIV int sr_scpi_get_opc(struct sr_serial_dev_inst *serial);
 SR_PRIV int sr_scpi_get_hw_id(struct sr_serial_dev_inst *serial,
 			      struct sr_scpi_hw_info **scpi_reponse);
 SR_PRIV void sr_scpi_hw_info_free(struct sr_scpi_hw_info *hw_info);