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uwcms / cms-calo-layer1

Xilinx Microblaze Projects for RCT Upgrade
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Can't make blinky lights on oRSC #35

Closed ekfriis closed 11 years ago

ekfriis commented 11 years ago

With the current FE oRSC bitfile, we can't make the LEDs light up via direct XMD writes. See the Makefile [1] for the xmd commands, or the instructions below.

Once should be able to (on a machine connected to oRSC via XMD):

# power cycle oRSC - lights will be blinky from Tom's BE bitfile
cd cms-calo-layer1/rct2orsc_byhand
# upload latest FE bitfile - lights are off
make orscfebits 
# write LED control registers via XMD
make lightson
# turn off LEDs
make lightsoff

Expected behavior: lights go on and off Actual behavior: lights stay off

[1] https://github.com/uwcms/cms-calo-layer1/blob/master/rct2orsc_byhand/Makefile#L42

ekfriis commented 11 years ago

Private email from Mathias:

The problem is that for some reason you got confused which FPGA the LEDs are connected to. This may have been my fault :-) They are connected to the BACKEND FPGA. And the following are the addresses:

        when x"10008000" => fpled1grnena_b_reg  <= BRAM_WRDATA_A(0)   ;
        when x"10008004" => fpled1redena_b_reg  <= BRAM_WRDATA_A(0)   ;
        when x"10008008" => fpled2grnena_b_reg  <= BRAM_WRDATA_A(0)   ;
        when x"1000800C" => fpled2redena_b_reg  <= BRAM_WRDATA_A(0)   ;
        when x"10008010" => fpled3grnena_b_reg  <= BRAM_WRDATA_A(0)   ;
        when x"10008014" => fpled3redena_b_reg  <= BRAM_WRDATA_A(0)   ;
dabelknap commented 11 years ago

make orscbebits needs to be run before the LEDs can be controlled.

ekfriis commented 11 years ago

Hooray, the lights blink! Thanks Austin