# HG changeset patch
# User David Douard <david.douard@logilab.fr>
# Date 1197318494 -3600
# Node ID 4d86b11abb823d0cc7255699a3b7f0367bd4f84d
# Parent  269aacbb2bf26c6751078080ed3b149ac97b78c9
ported 'dump_trace' to gpib API

diff -r 269aacbb2bf2 -r 4d86b11abb82 dump_trace.py
--- a/dump_trace.py	Mon Dec 10 21:22:33 2007 +0100
+++ b/dump_trace.py	Mon Dec 10 21:28:14 2007 +0100
@@ -2,28 +2,32 @@
 import time
 import gpib
 
-MODE = {'binary': 'DDBN',
-        'ascii': 'DDAS',
-        'ansi': 'DDAN',
-        }
+class GPIBtracedumper(gpib.GPIB):
+
+    MODE = {'binary': 'DDBN',
+            'ascii': 'DDAS',
+            'ansi': 'DDAN',
+            }
+    def __init__(self, device="/dev/ttyUSB0", baudrate=115200, timeout=0.1,
+                 address=0):
+        super(GPIBtracedumper, self).__init__(device, baudrate, timeout, address, mode=1)
 
-def read_trace(cnx, mode="binary"): 
-    mode = mode.lower()
-    assert mode in MODE
-    mode = MODE[mode]
-    res = ""
-    cnx.write('%s\r'%mode)
-    i = 0
-    while i<5:
-        l = cnx.readline()
-        if l.strip() == "":
-            i += 1
-            time.sleep(0.1)
-            continue
-        #print "got a new line (%s chars) [i=%s]"%(len(l), i)
-        res += l 
+    def read_trace(self, mode="binary"): 
+        mode = mode.lower()
+        assert mode in MODE
+        mode = MODE[mode]
+        res = ""
+        self._cnx.write('%s\r'%mode)
         i = 0
-    return res
+        while i<self._retries:
+            l = self._cnx.readline()
+            if l.strip() == "":
+                i += 1
+                time.sleep(self._timeout)
+                continue
+            res += l 
+            i = 0
+        return res
 
 
 if __name__=='__main__':
@@ -46,9 +50,9 @@
                    )
     options, argv = opt.parse_args(sys.argv)
 
-    cnx = open_connection(device=options.device,
-                          address=int(options.address), mode=1)
-    res = read_trace(cnx, mode=options.mode)
+    cnx = GPIBtracedumper(device=options.device,
+                          address=int(options.address))
+    res = cnx.read_trace(mode=options.mode)
 
     if options.filename:
         open(options.filename, 'w').write(res)