E1 related hardware projects (icE1usb, osmo-e1-tap, osmo-e1-xcvr, osmo-e1-tracer) https://osmocom.org/projects/e1-t1-adapter/wiki
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osmo-e1-hardware/firmware/ice40-riscv
Sylvain Munaut 0036b1fa9f icE1usb fw: Add device request to read/write I2C device registers 3 weeks ago
..
common common fw: Add hexval() utility function 11 months ago
e1-tracer fw/e1-tracer: Fix bNumInterfaces in new configuration 4 weeks ago
icE1usb icE1usb fw: Add device request to read/write I2C device registers 3 weeks ago
LICENSE.gpl3 firmware/ice40-riscv: Import common parts to all iCE40/RISC-V firmwares 2 years ago
LICENSE.lgpl3 firmware/ice40-riscv: Import common parts to all iCE40/RISC-V firmwares 2 years ago
README firmware/ice40-riscv: Import common parts to all iCE40/RISC-V firmwares 2 years ago

README

Firmware for iCE40 based board
==============================

The icE1usb, icE1usb-proto and e1-tracer boards are running very similar
gateware, all based around a PicoRV32 RISC-V softcore supported by custom
hardware cores to deal with USB and E1.


License
-------

Files in here are licended either under GPLv3 or LGPLv3 depending on the
specific file. Refer to the notice at the top of each file.

Full text for both licenses is included next to this README.