When I download a .bit file to the N210 using JTAG and Xilinx Impact the
programmer says all is good:
// *** BATCH CMD : Program -p 1
PROGRESS_START - Starting Operation.
Maximum TCK operating frequency for this device chain: 10000000.
Validating chain...
Boundary-scan chain validated successfully.
'1': Programming device...
LCK_cycle = NoWait.
LCK cycle: NoWait
done.
'1': Reading status register contents...
CRC error :
0
IDCODE not validated while writing FDRI :
0
DCM matched :
1
status of GTS_CFG_B :
1
status of GWE :
1
status of GHIGH :
1
value of VSEL pin 0 :
1
value of VSEL pin 1 :
1
value of VSEL pin 2 :
1
value of MODE pin M0 :
1
value of MODE pin M1 :
0
value of MODE pin M2 :
0
value of CFG_RDY (INIT_B) :
1
DONEIN input from Done Pin :
1
POST_CRC_ERR error :
0
SYNC word not found :
0
INFO:iMPACT:2219 - Status register values:
INFO:iMPACT - 0011 1111 1100 1100
INFO:iMPACT:579 - '1': Completed downloading bit file to device.
INFO:iMPACT:188 - '1': Programming completed successfully.
LCK_cycle = NoWait.
LCK cycle: NoWait
INFO:iMPACT - '1': Checking done pin....done.
'1': Programmed successfully.
PROGRESS_END - End Operation.
Elapsed time = 13 sec.
but the .bit file isn't actually active. I know because my changes aren't
present and the idcode reads the old value. I can reflash with the
corresponding .bin file and cycle power and it does become active.
Is it possible the download is triggering a reload of the bit stored in flash?
Any ideas are appreciated. Thanks
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