 H. Peter Anvin
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80ad2f4a50
fpga: dirty bit tracking for SDRAM
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1 year ago |
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H. Peter Anvin
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3672b35b21
picorv32: export user_context and addr[1:0] to outside bus
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1 year ago |
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H. Peter Anvin
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0271d1979a
sdram: return start to the right subunit; add ABC-bus latency counter
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2 years ago |
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H. Peter Anvin
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63c8bc2ec8
sdram: fix signal timing that broke dram bss zeroing.
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3 years ago |
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H. Peter Anvin
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08d8d7d2c8
More cleanups of multi-version... still broken?!
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3 years ago |
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H. Peter Anvin
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6db45e74e6
WIP: build both v1 and v2
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3 years ago |
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H. Peter Anvin
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a99616cbc5
WIP: restructure USB using interfaces to be able to create more endpoints
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3 years ago |
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H. Peter Anvin
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182ff5617a
sdram: simpler implementation of the arbiter/multiplexer
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3 years ago |
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H. Peter Anvin
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de1566292f
clocks: centralize strobes; rng: shut down when not in use
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3 years ago |
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H. Peter Anvin
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2034158a65
sdram: fix state machine problem
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3 years ago |
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H. Peter Anvin
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ac8a492ba2
sdram: fix 8-bit ports; rename fw/ to rv32/ to avoid confusion
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3 years ago |
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H. Peter Anvin
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980eaf0400
Restructure clock tree; better sdram timing; random number generator
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3 years ago |
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H. Peter Anvin
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cc37f87c67
sdram: rewrite as parameterized ports; usb: add USB core for testing
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3 years ago |
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H. Peter Anvin
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6ae39aaf12
Make romcopy device programmable and able to zero memory
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3 years ago |
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H. Peter Anvin
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2ee2c77bd7
sdram: fix initialization sequence again
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3 years ago |
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H. Peter Anvin
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996bd201be
Timing improvements: wait state for iodev, fix handling of sr_clk
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3 years ago |
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H. Peter Anvin
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03019163e4
spirom: revert uploader to arbitrary 8*n-byte bursts
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3 years ago |
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H. Peter Anvin
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42f4ad6376
Make downloader work; use PLL for SDRAM clock offset
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3 years ago |
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H. Peter Anvin
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f476073603
SPI ROM -> SDRAM download unit (not quite working yet?)
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3 years ago |
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H. Peter Anvin
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56287b0a05
sdram: leave CKE permanently enabled
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3 years ago |
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H. Peter Anvin
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6b7c85430e
sdram: I/O timing tweaks, hopefully for the better...
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3 years ago |
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H. Peter Anvin
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16e9576297
fpga: make the SDRAM work!
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3 years ago |
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H. Peter Anvin
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9e0713c926
sdram: remove misaligned handling
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3 years ago |
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H. Peter Anvin
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9b1134ea5b
sdram: improve initialization timing
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3 years ago |
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H. Peter Anvin
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265fb7692e
CPU now can execute instructions, at least in simulation!!
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3 years ago |
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H. Peter Anvin
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062a3d9eb1
Reorganize tree so a single Makefile can do the right thing
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3 years ago |
