github.com/antonblanchard.microwatt
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Merge pull request #159 from shenki/fusesoc-ram-16k

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FuseSoC needs 16kB of RAM
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Anton Blanchard 2020-04-16 15:15:07 +10:00 committed by GitHub
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4
README.md
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@ -94,9 +94,9 @@ fusesoc library add microwatt /path/to/microwatt/
- Build using FuseSoC. For hello world (Replace nexys_video with your FPGA board such as --target=arty_a7-100):
```
fusesoc run --target=nexys_video microwatt --memory_size=8192 --ram_init_file=/path/to/microwatt/fpga/hello_world.hex
fusesoc run --target=nexys_video microwatt --memory_size=16384 --ram_init_file=/path/to/microwatt/fpga/hello_world.hex
```
You should then be able to see output via the serial port of the board (/dev/ttyUSB1, 115200 for example assuming standard clock speeds). There is a know bug where initial output may not be sent - try the reset (not programming button on your board if you don't see anything.
You should then be able to see output via the serial port of the board (/dev/ttyUSB1, 115200 for example assuming standard clock speeds). There is a know bug where initial output may not be sent - try the reset (not programming button) on your board if you don't see anything.
- To build micropython (currently requires 1MB of BRAM eg an Artix-7 A200):

1
microwatt.core
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@ -164,6 +164,7 @@ parameters:
datatype : int
description : On-chip memory size (bytes)
paramtype : generic
default : 16384
ram_init_file:
datatype : file