tinyusb_soc.py - ValueError: Memory map has been frozen

[gaudat]

I am trying to use tinyusb_soc.py to evaluate this core. That part of the repository seems to be unmaintained but I had to try it as I could not find any other examples.

I am greeted with this exception on line 87. The memory map of SimpleSoC seems to be already fixed when returning from the constructor.

Should I dig further into this path? Or is there other documentation or examples for evaluating Luna as a SoC peripheral?

[gaudat]

In latest Amaranth assigning a memory map to a bus freezes the memory map preventing any modification afterwards.

Fix: luna/gateware/soc/memory.py line 88

    self.bus = wishbone.Interface(addr_width=self.local_addr_width, data_width=data_width, granularity=granularity)
    self.bus.memory_map = memory.MemoryMap(addr_width=self.bus_addr_width, data_width=granularity)
    self.bus.memory_map.add_resource(self, size=2 ** addr_width)

becomes:

    self.bus = wishbone.Interface(addr_width=self.local_addr_width, data_width=data_width, granularity=granularity)
    memory_map = memory.MemoryMap(addr_width=self.bus_addr_width, data_width=granularity)
    memory_map.add_resource(self, size=2 ** addr_width)
    self.bus.memory_map = memory_map

[antoinevg]

Thank you for reporting this!

We have an open PR bringing SimpleSoC up to date that is waiting on review:

#189

[gaudat]

Thank you for updating the SimpleSoC core! Looking forward to it.