[Commit-gnuradio] r11526 - gnuradio/trunk/usrp2/firmware/include

[jcorgan]

Author: jcorgan
Date: 2009-08-02 09:45:12 -0600 (Sun, 02 Aug 2009)
New Revision: 11526

Modified:
   gnuradio/trunk/usrp2/firmware/include/usrp2_eth_packet.h
Log:
Made libusrp2 min and max samples even number.

This forces an even number of samples in the min or max case,
preserving the alignment of interleaved samples in the face
of RX overruns or TX underruns.

Modified: gnuradio/trunk/usrp2/firmware/include/usrp2_eth_packet.h
===================================================================
--- gnuradio/trunk/usrp2/firmware/include/usrp2_eth_packet.h    2009-08-01 
23:30:10 UTC (rev 11525)
+++ gnuradio/trunk/usrp2/firmware/include/usrp2_eth_packet.h    2009-08-02 
15:45:12 UTC (rev 11526)
@@ -147,10 +147,11 @@
  *   ethernet header + transport header + fixed header + maximum number of 
samples.
  *   sizeof(u2_eth_samples_t) == 1512
  *   (payload is 1498 bytes, two bytes shorter than 1500 byte MTU)
+ *   (sample numbers are made even to force pairwise alignment in the 
interleaved case)
  */
 
-#define U2_MAX_SAMPLES 371
-#define        U2_MIN_SAMPLES    9
+#define U2_MAX_SAMPLES 370
+#define        U2_MIN_SAMPLES   10
 
 typedef struct {
   u2_eth_packet_t      hdrs;