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26210be950
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Peripherals/I2C_driver: Corrected the implementation of the bidirectional SDA pin, fixing the final yosys 0.35 warning
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2023-12-04 22:40:53 +00:00 |
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63ea29e399
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Peripherals/Memory: Added support for the litedram DDR memory controller, created a new memory map and updated all relevant code and files including the addition of rudimentary wait state support for the cpu (BIU)
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2023-12-03 19:24:39 +00:00 |
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aedefddb5d
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Project: The cpu finally works perfectly now even at full speed as far as i can tell! I made the ram and register writes synchronous which fixed the weird issues I had, then I added -abc9 to yosys so that nextpnr can actually route the cpu at full speed and increased the display fifo since the cpu is so fast now!!
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2023-11-15 18:43:56 +00:00 |
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29bc2e6d96
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Project: Cleaned up some code and run the project through aspell
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2023-11-15 14:37:46 +00:00 |
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09ccce5f30
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Peripherals/HD44780: Rewrote and cleaned up a lot of the driver code. Unfortunately what i think is a very weird bug in yosys is still affecting the codebase
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2023-11-15 00:26:46 +00:00 |
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2c8e8a9d9c
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Added simple support for \n and \r on the HD44780 driver, increased the synthesised mem to fit brainfuck_compiled.asm and made it the default.
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2023-11-12 21:39:27 +00:00 |
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7d2cb5672f
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Reduced numbers to be sorted in gnome_sort.asm to fit in lcd, fixed hlt on real hardware, slowed down cpu, increased lcd fifo and with that I almost got gnome_sort.asm working perfectly on real hardware
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2023-11-12 07:31:05 +00:00 |
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a88c420ca5
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Added an I2C driver, a PCF8574 driver and an HD44780 display driver. Unfortunately this shows that even fibonacci doesn't run correctly. Nonetheless, I made colored_led.asm output text to the display!
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2023-11-09 22:10:55 +00:00 |
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1a1634c673
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Updated README, improved fpga-specific makefile options and updated the version number
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2023-11-07 14:37:22 +00:00 |
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01dcbfa7a1
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The CPU works on real hardware for the first time! I added an adjustment for ram size, added control for a led and a test program for it. On the fpga board there is an actual led there that I used to verify functionality
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2023-11-06 08:13:36 +00:00 |
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934e2f5a36
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Fixed a bunch of things wrong with fpga_top.v and gated off some more simulation-only code
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2023-11-02 23:46:12 +00:00 |
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601397b7f0
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Properly added fpga_top.v stuff in the build system and fixed some syntax errors
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2023-11-02 22:00:07 +00:00 |
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36bf8f9c7a
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Added OrangeCrab board-specific code to connect the cpu to the outside world
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2023-11-02 20:40:04 +00:00 |
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5feee9de57
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Added support to the build system for synthesising, place and routing, serialising and uploading the design to a Lattice ECP5 OrangeCrab FPGA
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2023-11-02 00:29:14 +00:00 |
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