defines for STATUS bytes

[rigol] / usbtmc.c

diff --git a/usbtmc.c b/usbtmc.c
index e1366ae8cd8b2082eb7aebb9d5f8945b1bd5a81c..732b8f6d19691fccabdeffc60f9086c4e25eb94e 100644 (file)
--- a/usbtmc.c
+++ b/usbtmc.c
@@ -7,7 +7,7 @@
 #include "scope.h"
 #include "usbtmc.h"
 
-#define USB_TIMEOUT 50000
+#define USB_TIMEOUT 10000
 
 #if BYTE_ORDER == LITTLE_ENDIAN
 #define LE32(x) x
@@ -18,7 +18,7 @@
 #endif
 
 /* TODO: fix memory leak here: */
-#define USB_ERROR(s, x) do { if (x < 0) { fprintf(stderr, "usb %s: %s\n", s, usb_strerror()); usb_reset(sc->usb.dev); return 0; } } while(0)
+#define USB_ERROR(s, x) do { if (x < 0) { fprintf(stderr, "usb %s: %s\n", s, usb_strerror()); usbtmc_clear(sc); return 0; } } while(0)
 
 /* This routine locates a scope by VID/PID and returns a struct scope* for it */
 static struct scope* usbtmc_find_scope() {
@@ -60,7 +60,7 @@ static struct scope* usbtmc_find_scope() {
        return NULL;
 }
 
-static unsigned char usbtmc_status(struct scope *sc)
+static unsigned char usb488_status(struct scope *sc)
 {
        int r;
        unsigned char status[3];
@@ -72,7 +72,7 @@ static unsigned char usbtmc_status(struct scope *sc)
                (sc->usb.bTag & 0x7f), 0, (char*)status, 3,
                USB_TIMEOUT);
 
-       if ((r != 3) || (status[0] != 0x01) || (status[1] != (sc->usb.bTag & 0x7f))) {
+       if ((r != 3) || (status[0] != USBTMC_STATUS_SUCCESS) || (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;
        }
@@ -133,6 +133,48 @@ static struct usbtmc_capabilities* usbtmc_get_capabilities(struct scope *sc)
        return &res;
 }
 
+static void usbtmc_clear(struct scope *sc)
+{
+       int r;
+       unsigned char status[2];
+
+       printf("Initiating clear...\n");
+       r = usb_control_msg(sc->usb.dev, 0xA1,
+               USBTMC_CTL_INITIATE_CLEAR,
+               0, 0, (char*)status, 1,
+               USB_TIMEOUT);
+       
+       if ((r != 1) || status[0] != USBTMC_STATUS_SUCCESS) {
+               printf("INITIATE_CLEAR failed (0x%x): %s\n", status[0], usb_strerror());
+               return;
+       }
+
+       while(1) {
+               usleep(100000);
+               printf("Waiting for clear to complete...\n");
+
+               r = usb_control_msg(sc->usb.dev, 0xA1,
+                       USBTMC_CTL_CHECK_CLEAR_STAT,
+                       0, 0, (char*)status, 2,
+                       USB_TIMEOUT);
+
+               if (r != 2) {
+                       printf("CHECK_CLEAR failed: %s\n", usb_strerror());
+                       return;
+               }
+
+               if (USBTMC_STATUS_FAIL(status[0])) {
+                       printf("CHECK_CLEAR failed: 0x%x\n", status[0]);
+                       return;
+               }
+
+               if ((status[0] == USBTMC_STATUS_SUCCESS) && (status[1] == 0)) {
+                       printf("Success!\n");
+                       break;
+               }
+       }
+}
+
 /*
  * 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
@@ -198,7 +240,7 @@ int usbtmc_sendscpi(struct scope *sc, char* cmd,
                req->bTag = sc->usb.bTag;
                req->bTagInverse = ~sc->usb.bTag;
                req->TransferSize = LE32(sc->usb.wMaxPacketSize_in);
-               req->bmTransferAttributes = USBTMC_TRANSFERATTRIB_EOM;
+               req->bmTransferAttributes = 0;
                req->TermChar = 0;
 
                /* send read command */
@@ -286,7 +328,7 @@ struct scope* usbtmc_initscope(void) {
 
        usbtmc_claim(sc);
        sc->usb.cap = usbtmc_get_capabilities(sc);
-       printf("Device status: 0x%x\n", usbtmc_status(sc));
+       printf("Device status: 0x%x\n", usb488_status(sc));
        /* The following code isn't really necessary, the program works
           OK without it too. */
        r=usb_control_msg(sc->usb.dev, 0xC8, 9, 0, 0, (char*)&vidpid, 4, USB_TIMEOUT);