lowRISC / lowRISC/lowrisc-chip
Ariane-v0.7-VGA is always black (Nexys A7 100T) (nexys-ddr4-rocket)
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Description
Hi,
I have finish all the steps following https://www.cl.cam.ac.uk/~jrrk2/docs/xilinx/. After the command ''make nexys4_ddr_rocket_cfgmem'' ,
Mfg ID : 1 Memory Type : 20 Memory Capacity : 18 Device ID 1 : 0 Device ID 2 : 0
Performing Erase Operation...
Erase Operation successful.
Performing Program and Verify Operations...
Program/Verify Operation successful.
INFO: [Labtoolstcl 44-377] Flash programming completed successfully
program_hw_cfgmem: Time (s): cpu = 00:00:00.92 ; elapsed = 00:05:28 . Memory (MB): peak = 2208.875 ; gain = 31.000 ; free physical = 3284 ; free virtual = 20889
# endgroup
INFO: [Common 17-206] Exiting Vivado at Sun Mar 1 21:11:36 2020...
make[1]: Leaving directory '/home/layton/lowrisc-chip-ariane-v0.7/fpga'
After I insert the SD-card, set all the SW to '0' and PROG , my VGA is alway black.
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Research direction
Start with the documented `make nexys4_ddr_rocket_cfgmem` flow and the reported Nexys A7 setup, then reproduce the black VGA output after programming the SD card and setting all switches to 0. Trace the FPGA demo's configuration and VGA path; done means the programmed board displays the expected VGA output under those steps.
Written by the indexing model from the issue text.
Assessment
- Domain
- embedded-iot
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100