X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fscpi%2Fscpi.c;h=48e6a48495c9bfaba591147a12f715b67fe0b493;hb=94927260421eb8c5548294bbe5000b04bd1f0aa7;hp=9ea68b57316db06ad8d324cef67c41016f867227;hpb=7b365c47198890da8541a6daf04697c7c7ac88d4;p=libsigrok.git

diff --git a/src/scpi/scpi.c b/src/scpi/scpi.c
index 9ea68b57..48e6a484 100644
--- a/src/scpi/scpi.c
+++ b/src/scpi/scpi.c
@@ -337,6 +337,21 @@ SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi,
 	return scpi->read_data(scpi->priv, buf, maxlen);
 }
 
+/**
+ * Send data to SCPI device.
+ *
+ * @param scpi Previously initialised SCPI device structure.
+ * @param buf Buffer with data to send.
+ * @param len Number of bytes to send.
+ *
+ * @return Number of bytes read, or SR_ERR upon failure.
+ */
+SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi,
+			char *buf, int maxlen)
+{
+	return scpi->write_data(scpi->priv, buf, maxlen);
+}
+
 /**
  * Check whether a complete SCPI response has been received.
  *
@@ -364,12 +379,14 @@ SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi)
 /**
  * Free SCPI device.
  *
- * @param scpi Previously initialized SCPI device structure.
- *
- * @return SR_OK on success, SR_ERR on failure.
+ * @param scpi Previously initialized SCPI device structure. If NULL,
+ *             this function does nothing.
  */
 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi)
 {
+	if (!scpi)
+		return;
+
 	scpi->free(scpi->priv);
 	g_free(scpi->priv);
 	g_free(scpi);