From: Bert Vermeulen <redacted>
Date: Tue, 21 Jan 2014 11:54:24 +0000 (+0100)
Subject: rigol-ds: On DS1000 with firmware < 0.2.4, use legacy protocol.
X-Git-Tag: libsigrok-0.3.0~223
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=8dd0b290eb6ce6ebf9bde8b9a52785adb45b16f7;p=libsigrok.git

rigol-ds: On DS1000 with firmware < 0.2.4, use legacy protocol.

Apparently the ASCII header containing length was only added in version
0.2.4.
---

diff --git a/hardware/rigol-ds/api.c b/hardware/rigol-ds/api.c
index 52c72a44..087cc9a5 100644
--- a/hardware/rigol-ds/api.c
+++ b/hardware/rigol-ds/api.c
@@ -250,9 +250,10 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
 	struct sr_scpi_dev_inst *scpi;
 	struct sr_scpi_hw_info *hw_info;
 	struct sr_probe *probe;
+	long n[3];
 	unsigned int i;
 	const struct rigol_ds_model *model = NULL;
-	gchar *channel_name, *vendor;
+	gchar *channel_name, *vendor, **version;
 
 	*devices = NULL;
 
@@ -295,7 +296,6 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
 		return SR_ERR_NA;
 	}
 
-	sr_scpi_hw_info_free(hw_info);
 	sr_scpi_close(scpi);
 
 	sdi->conn = scpi;
@@ -308,6 +308,34 @@ static int probe_port(const char *resource, const char *serialcomm, GSList **dev
 
 	devc->limit_frames = 0;
 	devc->model = model;
+	devc->protocol = model->protocol;
+
+	/* DS1000 models with firmware before 0.2.4 used the old
+	 * legacy protocol. */
+	if (model->series == RIGOL_DS1000) {
+		version = g_strsplit(hw_info->firmware_version, ".", 0);
+		do {
+			if (!version[0] || !version[1] || !version[2])
+				break;
+			if (version[0][0] == 0 || version[1][0] == 0 || version[2][0] == 0)
+				break;
+			for (i = 0; i < 3; i++) {
+				if (sr_atol(version[i], &n[i]) != SR_OK)
+					break;
+			}
+			if (i != 3)
+				break;
+			if (n[0] != 0 || n[1] > 2)
+				break;
+			if (n[1] == 2 && n[2] > 3)
+				break;
+			sr_dbg("Found DS1000 firmware < 0.2.4, using old protocol.");
+			devc->protocol = PROTOCOL_LEGACY;
+		} while(0);
+		g_strfreev(version);
+	}
+
+	sr_scpi_hw_info_free(hw_info);
 
 	for (i = 0; i < model->analog_channels; i++) {
 		if (!(channel_name = g_strdup_printf("CH%d", i + 1)))
diff --git a/hardware/rigol-ds/protocol.c b/hardware/rigol-ds/protocol.c
index 4f4ff412..446534b9 100644
--- a/hardware/rigol-ds/protocol.c
+++ b/hardware/rigol-ds/protocol.c
@@ -460,7 +460,7 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void *cb_data)
 			if (sr_scpi_read_begin(scpi) != SR_OK)
 				return TRUE;
 
-			if (devc->model->protocol == PROTOCOL_IEEE488_2) {
+			if (devc->protocol == PROTOCOL_IEEE488_2) {
 				sr_dbg("New block header expected");
 				len = rigol_ds_read_header(scpi);
 				if (len == -1)
@@ -529,7 +529,7 @@ SR_PRIV int rigol_ds_receive(int fd, int revents, void *cb_data)
 				/* Discard the terminating linefeed */
 				sr_scpi_read_data(scpi, (char *)devc->buffer, 1);
 			}
-			if (devc->model->protocol == PROTOCOL_IEEE488_2) {
+			if (devc->protocol == PROTOCOL_IEEE488_2) {
 				/* Prepare for possible next block */
 				devc->num_block_bytes = 0;
 				if (devc->data_source != DATA_SOURCE_LIVE)
diff --git a/hardware/rigol-ds/protocol.h b/hardware/rigol-ds/protocol.h
index 121b3ea3..9c4c7f80 100644
--- a/hardware/rigol-ds/protocol.h
+++ b/hardware/rigol-ds/protocol.h
@@ -93,6 +93,7 @@ enum wait_events {
 struct dev_context {
 	/* Device model */
 	const struct rigol_ds_model *model;
+	enum rigol_protocol_flavor protocol;
 
 	/* Device properties */
 	const uint64_t (*timebases)[2];