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no2fpga/no2bootloader

Porting to ICE5LP4K

Is it possible to port bootloader to ICE5LP4K FPGA, main problem is that this chip does not have SPRAM at all, then question is will the RISC-V run on BRAM, will it fit?

• krzysztofgawrys
·
• 1
·
• Opened 
  on Mar 8, 2024
·
• #16

no2fpga/no2bootloader

ice40-stub has slightly broken instructions because prerequisites are both depreciated

I had luck with riscv-none-elf though, which replaced it. Work-around(s) follows: - Used XPM to install https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack (following current instructions ...

• RGD2
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• Opened 
  on May 16, 2023
·
• #14

no2fpga/no2bootloader

Porting to Ulx3s and Ulx4m Devices

I am attempting to port this bootloader to the Ulx3s Ecp5 device and then to the new Ulx4m device, which has more need of a dfu bootloader. I believe you had some discussion with Goran Mahovlic of Radiona ...

• lawrie
·
• 29
·
• Opened 
  on Sep 30, 2021
·
• #12

no2fpga/no2bootloader

Does the clock matter and where can I change the clock freq of the bootloader?

Is there a way to change the clock freq of the bootloader for the icebreaker bitsy? The original design has a 12Mhz Clock built in, my custom design uses a 40Mhz Clock. Does this influence the USB bootloader ...

• jakobstoeckl
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• 10
·
• Opened 
  on Aug 25, 2021
·
• #11

no2fpga/no2bootloader

Cannot make the bootloader for the Icebreaker bitsy :(

turbo@core:~/fpga/bootloader/no2bootloader/gateware/ice40-stub$ make BOARD=bitsy-v1 bootloader Makefile:33: ../build/project-rules.mk: No such file or directory make: *** No rule to make target ../build/project-rules.mk ...

• jakobstoeckl
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• 5
·
• Opened 
  on Jul 25, 2021
·
• #10

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