From: Michael Gernoth <michael@gernoth.net>
Date: Sat, 19 Jun 2010 17:16:16 +0000 (+0200)
Subject: export data through webinterface
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/rigol/commitdiff_plain/8e60ee60c04ec12ceac8f3cbc04cebe7a9c1efd8?ds=inline

export data through webinterface
---

diff --git a/rigold.c b/rigold.c
index 93a5eb0..955975a 100644
--- a/rigold.c
+++ b/rigold.c
@@ -196,6 +196,13 @@ static void serve_index(int s, struct scope *sc, char *param)
 		sc->status.math.displayed,
 		sc->status.fft.displayed);
 
+	send_text(s, "<br>Data: ");
+	send_text(s, "<a href=\"/cgi-bin/data?CHAN1\">Channel 1</a> ");
+	send_text(s, "<a href=\"/cgi-bin/data?CHAN2\">Channel 2</a> ");
+	send_text(s, "<a href=\"/cgi-bin/data?DIG\">Digital</a> ");
+	send_text(s, "<a href=\"/cgi-bin/data?MATH\">Math</a> ");
+	send_text(s, "<a href=\"/cgi-bin/data?FFT\">FFT</a><br>");
+
 	send_text(s, "<br>\n");
 	send_text(s, "<form method=\"get\" action=\"\">\n");
 	send_text(s, "<input type=\"text\" name=\"cmd\" value=\"");
@@ -249,6 +256,28 @@ static void serve_lcd(int s, struct scope *sc)
 	free(png);
 }
 
+static void serve_data(int s, struct scope *sc, char *source)
+{
+	char *data;
+	int len;
+	int i;
+
+	send_text(s, "HTTP/1.0 200 OK\n");
+	send_text(s, "Content-type: text/plain\n\n");
+
+	claimscope(sc);
+	data = scope_get_data(sc, source, &len);
+	releasescope(sc);
+
+	if (data != NULL) {
+		for (i = 0; i < (len-1); i++) {
+			send_text(s, "%d,", data[i]);
+		}
+		send_text(s, "%d", data[len-1]);
+		free(data);
+	}
+}
+
 static void serve_404(int s)
 {
 	send_text(s, "HTTP/1.0 404 Not found\n");
@@ -349,6 +378,8 @@ static void parse_request(int s, struct scope *sc)
 		serve_index(s, sc, param);
 	} else if (strcmp("/cgi-bin/lcd", file) == 0) {
 		serve_lcd(s, sc);
+	} else if (strcmp("/cgi-bin/data", file) == 0) {
+		serve_data(s, sc, param);
 	} else {
 		serve_404(s);
 	}
diff --git a/scope.c b/scope.c
index 43439ff..09c9b8d 100644
--- a/scope.c
+++ b/scope.c
@@ -8,6 +8,17 @@
 #include "scope.h"
 #include "usbtmc.h"
 
+#define DATASIZE 10240
+
+#define COPY_SCOPE_STRING(sc, cmd, dst) { \
+						char *buf; \
+						buf = scope_get_string(sc, cmd, sizeof(dst)); \
+						if (buf) { \
+							strcpy(dst, buf); \
+							free(buf); \
+						}\
+					}
+
 /* Just USB for now... */
 int sendscpi(struct scope* sc, char* cmd, unsigned char *resp, int resplen)
 {
@@ -48,7 +59,7 @@ struct scope* initscope(void)
 	}
 
 	claimscope(sc);
-	sendscpi(sc, "*IDN?", (unsigned char*)sc->idn, sizeof(sc->idn)); 
+	COPY_SCOPE_STRING(sc, "*IDN?", sc->idn);
 	releasescope(sc);
 
 	printf("Scope found (%s)\n", sc->idn);
@@ -61,15 +72,6 @@ char *scope_idn(struct scope *sc)
 	return sc->idn;
 }
 
-#define COPY_SCOPE_STRING(sc, cmd, dst) { \
-						char *buf; \
-						buf = scope_get_string(sc, cmd, sizeof(dst)); \
-						if (buf) { \
-							strcpy(dst, buf); \
-							free(buf); \
-						}\
-					}
-
 char *scope_get_string(struct scope *sc, char *cmd, int maxlen)
 {
 	unsigned char *buf;
@@ -147,6 +149,22 @@ double scope_get_double(struct scope *sc, char*cmd)
 	return ret;
 }
 
+char *scope_get_data(struct scope *sc, char *source, int *len)
+{
+	char *data = NULL;
+	char cmd[128];
+
+	if ((data = malloc(DATASIZE)) == NULL) {
+		perror("malloc");
+		return NULL;
+	}
+
+	snprintf(cmd, sizeof(cmd), ":WAV:DATA? %s", source);
+	*len = sendscpi(sc, cmd, (unsigned char*)data, DATASIZE);
+
+	return data;
+}
+
 void update_scope_measurements(struct scope *sc)
 {
 	sc->status.measure.ch1.vpp = scope_get_double(sc, ":MEAS:VPP? CHAN1");
diff --git a/scope.h b/scope.h
index dba5670..a74809b 100644
--- a/scope.h
+++ b/scope.h
@@ -133,3 +133,4 @@ int scope_get_int(struct scope *sc, char *cmd);
 double scope_get_double(struct scope *sc, char*cmd);
 void update_scope_measurements(struct scope *sc);
 int update_scope_status(struct scope *sc);
+char *scope_get_data(struct scope *sc, char *source, int *len);