tempo-plotter Changeset - bfa48fec6da4 · protofusion repositories

Changeset - bfa48fec6da4

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new-reader

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Hasan Yavuz ÖZDERYA - 9 years ago 2016-05-29 17:19:04
hy@ozderya.net

added pseudo sender for framed reader

1 file changed with 31 insertions and 1 deletions:

misc/pseudo_device.py

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misc/pseudo_device.py

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@@ @@ -71,6 +71,34 @@ def uint32_test(port, little): @@
         time.sleep(0.05)
         i = i+1 if i <= maxi else 0
 def frame_test(port, fixed_size=False, hasChecksum=True):
     """Sends binary data in framed format."""
     SYNCWORD = [0xAA, 0xBB]
     NUMSAMPLES = 10
     SIZE = NUMSAMPLES * 4 # integer
     if fixed_size:
         HEADER = bytes(SYNCWORD)
     else:
         HEADER = bytes(SYNCWORD + [SIZE])
     i = 0
     checksum = 0
     bytesent = 0
     while True:
         if i > 100: i = 0
         if bytesent == 0: # beginning of a frame?
             os.write(port, HEADER)
         os.write(port, struct.pack('<I', i))
         bytesent += 4
         checksum += i
         i += 1
         if bytesent == SIZE: # end of a frame
             if hasChecksum:
                 data = struct.pack('<I', checksum)[:1]
                 os.write(port, data)
             checksum = 0
             bytesent = 0
         time.sleep(0.1)
 def run():
     # create the pseudo terminal
     master, slave = pty.openpty()
@@ @@ -80,7 +108,9 @@ def run(): @@
     print("Master terminal: {}\nSlave terminal: {}".format(master_name, slave_name))
     try:
         float_sine(master)
         # float_sine(master)
         frame_test(master)
         # ascii_test(master)
     finally:
         # close the pseudo terminal files
         os.close(master)

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