Re: [Discuss-gnuradio] .bit file not loading on usrp n210

[Ian Buckley]

I've only done a little FPGA work on the N210 so this is a bit of a guess, Nick 
or Josh can answer better, but I would imagine you probably need to understand 
how the FPGA image "bootstraps". The N210 stores 2 FPGA images so that there is 
a safe image to restore from if you upload a bad image. This is because the 
normal FPGA image update mechanism is via TCP/IP and hence uses the FPGA...a 
chicken and egg problem as it were. Unless you are developing an FPGA image 
that throws away the Ettus boot mechanism I'd suggest sticking to the regular 
FPGA image update methodology and restrict your use of JTAG to Chipscope etc.
-Ian

On Oct 25, 2011, at 9:06 AM, Clark Pope wrote:

> 
> 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                                      
>   
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio