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Update ftditool and use new ELF loader in FPGA runner #587

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Merged
ziuziakowska merged 2 commits into from
Jun 1, 2026
Merged

Update ftditool and use new ELF loader in FPGA runner #587

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ae6e168
nix: update `ftditool` to 0.4.0, regenerate flake
ziuziakowska May 28, 2026
d56658b
util: fpga runner: use new `bootstrap-elf` command
ziuziakowska May 28, 2026
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26 changes: 13 additions & 13 deletions flake.lock
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2 changes: 1 addition & 1 deletion flake.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@
inputs.uv2nix.follows = "uv2nix";
};
ftditool = {
url = "github:lowRISC/ftditool?ref=v0.3.1";
url = "github:lowRISC/ftditool?ref=v0.4.0";
inputs.nixpkgs.follows = "nixpkgs";
};
};
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26 changes: 2 additions & 24 deletions util/fpga_runner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,6 @@

import serial
import serial.tools.list_ports
from elftools.elf.elffile import ELFFile

FTDI_PID: int = 0x6010
BAUD_RATE: int = 1_000_000
Expand Down Expand Up @@ -71,39 +70,18 @@ async def bootstrap(uart: serial.Serial | None) -> None:
await set_pin(0, True)


def get_load_addr(elf: Path) -> int:
try:
with elf.open("rb") as f:
elf = ELFFile(f)
load_addrs = [
seg["p_paddr"] for seg in elf.iter_segments() if seg["p_type"] == "PT_LOAD"
]
if not load_addrs:
print(f"[{RUNNER}] no PT_LOAD segments found in ELF file {elf}")
sys.exit(1)
return min(load_addrs)
except OSError as e:
print(f"[{RUNNER}] error opening ELF file {elf}: {e}")
sys.exit(1)


async def load_fpga_binary(path: Path, uart: serial.Serial | None) -> None:
load_address = get_load_addr(path)

await bootstrap(uart)

command = [
"ftditool",
"--pid",
hex(FTDI_PID),
"bootstrap",
"--addr",
hex(load_address),
"--skip-erase",
"bootstrap-elf",
str(path),
"--ftdi",
FTDI_DEVICE_DESC,
]
command.append(str(path.with_suffix(".bin")))

p = await asyncio.create_subprocess_exec(*command)
if await p.wait() != 0:
Expand Down