From: Michael Gernoth <michael@gernoth.net>
Date: Mon, 7 Jun 2010 22:57:22 +0000 (+0200)
Subject: add usbtmc_status
X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/rigol/commitdiff_plain/121b4233e9098232769fb8844cf4caba8a5a5194

add usbtmc_status
---

diff --git a/usbtmc.c b/usbtmc.c
index 4a23a4f..419d100 100644
--- a/usbtmc.c
+++ b/usbtmc.c
@@ -59,6 +59,22 @@ static struct scope* usbtmc_find_scope() {
 	return NULL;
 }
 
+unsigned char usbtmc_status(struct scope *sc)
+{
+	int r;
+	unsigned char status[3];
+
+	sc->usb.bTag++;
+
+	r = usb_control_msg(sc->usb.dev, 0xA1, 128, (sc->usb.bTag & 0x7f), 0, (char*)status, 3, USB_TIMEOUT);
+	if ((r != 3) || (status[0] != 0x01) || (status[1] != (sc->usb.bTag & 0x7f))) {
+		printf("READ_STATUS_BYTE failed: %d 0x%x 0x%x 0x%x\n", r, status[0], status[1], status[2]);
+		return 0xff;
+	}
+
+	return status[2];
+}
+
 /*
  * Send a scpi-command to the scope. The response goes into the buffer
  * called resp, with a size of resplen. If resp==NULL, no response