test/helloworld.v

[1hwg]

Hej!
When synthesizing test/helloworld.v example with:
Windows - Lattice iCEcube2
Lattice Semiconductor Ccrpcraticn iCEcube
Release: 2020.12.27943
BuildDate: Dec 92020 183908
I get an error(s):

(...)
@i::"M:\lscc\iCEcube2.2020.12\synpbase\lib\generic\sb_ice40.v" (library work)
@i::"M:\lscc\iCEcube2.2020.12\synpbase\lib\vlog\hypermods.v" (library hyper__lib)
@i::"M:\lscc\iCEcube2.2020.12\synpbase\lib\vlog\umr_capim.v" (library snps_haps)
@i::"M:\lscc\iCEcube2.2020.12\synpbase\lib\vlog\scemi_objects.v" (library snps_haps)
@i::"M:\lscc\iCEcube2.2020.12\synpbase\lib\vlog\scemi_pipes.svh" (library snps_haps)
@i::"D:\MyDoc\Lattice\Helloworld\helloworld.v" (library work)
@i::"D:\MyDoc\Lattice\Helloworld\mem2serial.v" (library work)
@i::"D:\MyDoc\Lattice\Helloworld\ringbuffer.v" (library work)
@e: CS179 :"D:\MyDoc\Lattice\Helloworld\ringbuffer.v":24:8:24:12|Assignment target empty must be a net type
@e: CS179 :"D:\MyDoc\Lattice\Helloworld\ringbuffer.v":25:8:25:15|Assignment target overflow must be a net type
@i::"D:\MyDoc\Lattice\Helloworld\buffer.v" (library work)
@i::"D:\MyDoc\Lattice\Helloworld\uart_tx.v" (library work)
@i::"D:\MyDoc\Lattice\Helloworld\power_on_reset.v" (library work)
@i::"D:\MyDoc\Lattice\Helloworld\helloworldwriter.v" (library work)
2 syntax errors
(...)

while synthesizing with:

| yosys -- Yosys Open SYnthesis Suite |
| |
| Copyright (C) 2012 - 2019 Clifford Wolf clifford@clifford.at |
Yosys 0.9 (git sha1 1979e0b) @ UBUNTU

~/lpc_sniffer-master/make test/helloworld.bin

receives warnings:

(...)
Warning: reg '\empty' is assigned in a continuous assignment at ringbuffer.v:20.
Warning: reg '\overflow' is assigned in a continuous assignment at ringbuffer.v:21.
(...)

the synthesized bitmap loaded into the iCEstick doesn't work.

I don't know much about hardware programming,
I just need a working sniffer to read the INTEL MB BIOS error codes (80H Port).

I start with simple tests...

Adam