1 files changed, 88 insertions, 0 deletions
diff --git a/usrp/limbo/inband/gen_test_packets.py b/usrp/limbo/inband/gen_test_packets.py
new file mode 100755
index 000000000..2ee646384
--- /dev/null
+++ b/usrp/limbo/inband/gen_test_packets.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+
+import random
+import struct
+from pprint import pprint
+from usb_packet import *
+
+MAX_PAYLOAD = 504
+TIME_NOW = 0xffffffff
+
+
+class sequence_generator(object):
+    def __init__(self):
+        self.i = 0
+    
+    def __call__(self):
+        t = self.i
+        self.i += 1
+        return t
+
+def gen_shuffled_lengths():
+    valid_lengths = range(0, MAX_PAYLOAD+1, 4)  # [0, 4, 8, ... 504]
+    random.shuffle(valid_lengths)
+    return valid_lengths
+
+
+class packet_sequence_generator(object):
+    def __init__(self, channel, lengths):
+        self.next = sequence_generator()
+        self.channel = channel
+        self.lengths = lengths
+
+    def __call__(self, output_file):
+        gen_packet(output_file, self.channel, self.next, self.lengths[0])
+        del self.lengths[0]
+
+
+def gen_packet(output_file, channel, content_generator, payload_len):
+    assert (payload_len % 4) == 0
+    payload = []
+    n_iq = payload_len // 4
+    for n in range(n_iq):
+        payload.append(content_generator())  # I
+        payload.append(content_generator())  # Q
+    for n in range(MAX_PAYLOAD // 4 - n_iq):
+        payload.append(0x0000)
+        payload.append(0xffff)
+
+    assert (len(payload) == MAX_PAYLOAD // 2)
+
+    #print "\npayload_len =", payload_len
+    #pprint(payload)
+
+    output_file.write(make_header(FL_START_OF_BURST|FL_END_OF_BURST,
+                                  channel, payload_len, TIME_NOW))
+    output_file.write(struct.pack('<252h', *payload))
+
+
+def gen_all_valid_packet_lengths_1_channel(output_file):
+    lengths = gen_shuffled_lengths()
+    npkts = len(lengths)                # number of packets we'll generator on each stream
+    pkt_gen_0 = packet_sequence_generator(0, lengths)
+    for i in range(npkts):
+        pkt_gen_0(output_file)
+    
+    assert pkt_gen_0.next() == 16002    # 2*sum(1, 2, ..., 126) == 126 * 127
+
+
+def gen_all_valid_packet_lengths_2_channels(output_file):
+    lengths = gen_shuffled_lengths()
+    npkts = len(lengths)                # number of packets we'll generator on each stream
+    pkt_gen_0 = packet_sequence_generator(0, lengths)
+    pkt_gen_1 = packet_sequence_generator(0x1f, gen_shuffled_lengths())
+    pkt_gen = (pkt_gen_0, pkt_gen_1)
+    
+    which_gen = (npkts * [0]) + (npkts * [1])
+    random.shuffle(which_gen)
+    
+    for i in which_gen:
+        pkt_gen[i](output_file)
+    
+    assert pkt_gen_0.next() == 16002    # 2*sum(1, 2, ..., 126) == 126 * 127
+    assert pkt_gen_1.next() == 16002    # 2*sum(1, 2, ..., 126) == 126 * 127
+
+if __name__ == '__main__':
+    random.seed(0)
+    gen_all_valid_packet_lengths_1_channel(open("all_valid_packet_lengths_1_channel.dat", "w"))
+    gen_all_valid_packet_lengths_2_channels(open("all_valid_packet_lengths_2_channels.dat", "w"))