From e9a73bbb3c14af340999f70146747787785f4fee Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Mon, 19 Dec 2011 18:20:33 +0000
Subject: initial commit

---
 pyBTlatency/pySerialGraph.py | 64 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100755 pyBTlatency/pySerialGraph.py

(limited to 'pyBTlatency/pySerialGraph.py')

diff --git a/pyBTlatency/pySerialGraph.py b/pyBTlatency/pySerialGraph.py
new file mode 100755
index 0000000..61b2ed9
--- /dev/null
+++ b/pyBTlatency/pySerialGraph.py
@@ -0,0 +1,64 @@
+#!/usr/bin/python
+
+import time
+import serial
+import signal
+import sys, csv
+import pygame
+
+class Serial(serial.PosixSerial,serial.FileLike):
+        #workaround for python 2.6 seriall behavior, http://code.google.com/p/python-on-a-chip/issues/detail?id=110
+        pass
+
+ser = Serial(
+	port='/dev/ttyUSB0',
+	baudrate=115200,
+)
+
+def signal_handler(signal, frame):
+        print "closing serial port"
+        ser.close()
+        sys.exit(0)
+        
+signal.signal(signal.SIGINT, signal_handler)
+tStart=time.time()
+waiting=True
+print "Starting..."
+while waiting:
+        ser.write('a') #start comms
+        time.sleep(0.1);
+        while time.time()-tStart<1.0 and waiting :
+                if ser.inWaiting() >0:
+                         print ser.readline()
+                         waiting=False
+                time.sleep(0.1);
+        if waiting:
+                print "Timeout,restarting..."
+                tStart=time.time()
+window = pygame.display.set_mode((640, 512))
+y=127
+times=[]
+tSec=40;
+while 1:
+        if ser.inWaiting() >0:
+                i=ser.readline(eol=chr(0))
+                #print "received packet:",len(i),"bytes"
+                pygame.draw.rect(window,(0,0,0),(0,0, 640,512))
+                for x in range(0,len(i)-1): #skip end char
+                        y1=ord(i[x])
+                        pygame.draw.line(window, (255, 255, 255), (x*2, y*2), ((x*2)+2, y1*2))
+                        y=y1
+                        
+                tNow=time.time();
+                times.append(tNow-tStart);
+                tStart=tNow
+                if len(times)>320:
+                        times.pop(0)
+                for x in range(0,len(times)-1): #skip end char
+                        pygame.draw.line(window, (255, 0, 0), (x*2, 512-(255*times[x]*tSec)), ((x*2)+2, 512-(255*times[x]*tSec)) )
+                pygame.display.flip()
+                
+        time.sleep(0.01)
+                
+
+                
\ No newline at end of file
-- 
cgit v1.2.3