Whats the trick to get the FX2 to work in auto-out mode? I've tried
with fx2_programmer's bulk_write command and with a modified version of
the test_usrp_standard_tx code. With fx2_programmer I get "connection
to endpoint 2 timed out" and test_*_standard_tx sends 8MB before
blocking indefinately. Basically I think the FX2 just isn't taking any
data in. It seems that even if I don't have auto-out setup correctly, I
should be able to at least write a few bytes to the endpoint...
Does anyone have anything that works that I can see? Unfortunately the
USRP firmware uses the GPIF mode instead of FIFO mode so I'm not sure
how applicable the code is...
Thanks,
David Carr
Here's what I have (with a few questions):
CPUCS = bmCLKSPD1; // CPU runs @ 48 MHz
IFCONFIG=0xC3; //Internal IFCLK at 48MHz, clock out disabled
SYNCDELAY;//Normal polarity, Sync, Slave FIFO mode
SYNCDELAY;
REVCTL = 0x03; //The TRM says to set this or ELSE
SYNCDELAY;
EP2CFG = 0xA2; //EP2 enabled, direction: OUT, type: BULK, Buffer size:
512, 2x Buffered
FIFORESET = 0x80; // Reset the FIFO
SYNCDELAY;
FIFORESET = 0x02;
SYNCDELAY;
FIFORESET = 0x00;
SYNCDELAY;
EP2FIFOCFG = 0x00; //AUTO-OUT disabled, wordwide=0 (8 bit bus with)
SYNCDELAY;
EP2FIFOCFG = 0x10; //AUTO-OUT enabled, wordwide=0 (8 bit bus with)
SYNCDELAY;
EP2BCL = 0x00; //is this needed to arm the endpoint?
SYNCDELAY;
EP2BCL = 0x00;
SYNCDELAY;
OUTPKTEND = 0x8F; //the example says x82 --- why do I want the SKIP
bit set? Also x82 sets the bit for EP1 I think -- NOT EP2
SYNCDELAY;
OUTPKTEND = 0x8F;
SYNCDELAY;
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