From: Sven Schnelle <redacted>
Date: Mon, 13 Feb 2017 17:48:52 +0000 (+0100)
Subject: SCPI: add sr_scpi_write_data()
X-Git-Tag: libsigrok-0.5.0~88
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=b6be55ce95b8d4d00d64874a05c022846e43cec4;p=libsigrok.git

SCPI: add sr_scpi_write_data()

Can be used to send raw data on a SCPI connection.

Signed-off-by: Sven Schnelle <redacted>
---

diff --git a/src/scpi.h b/src/scpi.h
index ddfd9450..93230062 100644
--- a/src/scpi.h
+++ b/src/scpi.h
@@ -91,6 +91,7 @@ struct sr_scpi_dev_inst {
 	int (*send)(void *priv, const char *command);
 	int (*read_begin)(void *priv);
 	int (*read_data)(void *priv, char *buf, int maxlen);
+	int (*write_data)(void *priv, char *buf, int len);
 	int (*read_complete)(void *priv);
 	int (*close)(struct sr_scpi_dev_inst *scpi);
 	void (*free)(void *priv);
@@ -116,6 +117,7 @@ SR_PRIV int sr_scpi_send_variadic(struct sr_scpi_dev_inst *scpi,
 		const char *format, va_list args);
 SR_PRIV int sr_scpi_read_begin(struct sr_scpi_dev_inst *scpi);
 SR_PRIV int sr_scpi_read_data(struct sr_scpi_dev_inst *scpi, char *buf, int maxlen);
+SR_PRIV int sr_scpi_write_data(struct sr_scpi_dev_inst *scpi, char *buf, int len);
 SR_PRIV int sr_scpi_read_complete(struct sr_scpi_dev_inst *scpi);
 SR_PRIV int sr_scpi_close(struct sr_scpi_dev_inst *scpi);
 SR_PRIV void sr_scpi_free(struct sr_scpi_dev_inst *scpi);
diff --git a/src/scpi/scpi.c b/src/scpi/scpi.c
index 00f4ef80..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.
  *
diff --git a/src/scpi/scpi_tcp.c b/src/scpi/scpi_tcp.c
index a4cb6942..c01cc560 100644
--- a/src/scpi/scpi_tcp.c
+++ b/src/scpi/scpi_tcp.c
@@ -183,6 +183,21 @@ static int scpi_tcp_raw_read_data(void *priv, char *buf, int maxlen)
 	return len;
 }
 
+static int scpi_tcp_raw_write_data(void *priv, char *buf, int len)
+{
+	struct scpi_tcp *tcp = priv;
+	int sentlen;
+
+	sentlen = send(tcp->socket, buf, len, 0);
+
+	if (sentlen < 0) {
+		sr_err("Send error: %s.", g_strerror(errno));
+		return SR_ERR;
+	}
+
+	return sentlen;
+}
+
 static int scpi_tcp_rigol_read_data(void *priv, char *buf, int maxlen)
 {
 	struct scpi_tcp *tcp = priv;
@@ -256,6 +271,7 @@ SR_PRIV const struct sr_scpi_dev_inst scpi_tcp_raw_dev = {
 	.send          = scpi_tcp_send,
 	.read_begin    = scpi_tcp_read_begin,
 	.read_data     = scpi_tcp_raw_read_data,
+	.write_data    = scpi_tcp_raw_write_data,
 	.read_complete = scpi_tcp_read_complete,
 	.close         = scpi_tcp_close,
 	.free          = scpi_tcp_free,