E1 related hardware projects (icE1usb, osmo-e1-tap, osmo-e1-xcvr, osmo-e1-tracer) https://osmocom.org/projects/e1-t1-adapter/wiki
Go to file
Sylvain Munaut 26bc4659af firmware/ice40-riscv: Import common parts to all iCE40/RISC-V firmwares
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
2020-09-14 10:56:49 +02:00
doc doc: Import the official specification documents for E1 2020-09-13 21:22:55 +02:00
firmware/ice40-riscv firmware/ice40-riscv: Import common parts to all iCE40/RISC-V firmwares 2020-09-14 10:56:49 +02:00
flashing add flash scripts to flash e1_tracer via https://github.com/dword1511/stm32-vserprog.git and dfu-util 2020-08-27 00:45:20 +02:00
gateware gateware/e1-tracer: Initial import 2020-09-14 10:56:49 +02:00
hardware hardware/icE1usb: Initial import of the production hardware design files 2020-09-14 10:56:49 +02:00
mechanical/icE1usb-case mechanical: Import all design files for the icE1usb case 2020-09-13 21:24:07 +02:00
software/obsolete software/obsloete: Add sockbuf_test.c from my local tree 2020-09-04 14:57:52 +02:00
.gitmodules gateware: Initial import of all common parts 2020-09-14 10:56:49 +02:00
README Change name of repository in README 2020-09-04 13:14:40 +00:00

README

osmo-e1-hardware - Collection of various E1/TDM hardware projects
======================================================================

This repository hosts three different sub-projects:

* osmo-e1-xcvr (E1 LIU + magnetics)
  https://osmocom.org/projects/e1-t1-adapter/wiki/Osmo-e1-xcvr
* osmo-e1-tracer (fully integrated passive raw bitstream tracer)
  https://osmocom.org/projects/e1-t1-adapter/wiki/E1_tracer
* osmo-e1-tap (passive high-impedance tap)

== osmo-e1-xcvr ==

This is a simple hardware project that aims to generate a reusable module
for interfacing E1/T1/J1 lines from various custom FPGA/CPLD/microcontroller
projects.

The board contains tranformers, the analog circuitry, the LIU (line interface
unit), an oscillator as well as an integrated transceiver chip.

It exposes the control interface (SPI) as well as the decoded synchronous
Rx/Tx bitstreams each on a 2x5pin header.

Framer, Multiplexe,r HDLC decoder or anything like that is out-of-scope for
now.  The idea relaly is to provide an interface as low-level as possible.

One of the ideas is to create a "soft E1" interface, where the Rx/Tx bitstreams
are interfaced with the SSC of an AT91SAM3S and subsequently passed into a PC
via USB.  The 2Mbps signal is very low-bandwidth, so that a pure software
implementation should be absolutely no problem for todays computing power.

See https://osmocom.org/projects/e1-t1-adapter/wiki/Osmo-e1-xcvr for more details


== osmo-e1-tap ==

This is a small passive board that allows you to perform high-impedance tracing on an E1
or T1 line.


== osmo-e1-tracer ==

This is a fully integrated design that allows you to obtainm bi-directional high-impedance
bitstream E1 traces.  It features an iCE40 FPGA with USB + E1 cores from Sylvain Munaut,
as well as two E1 LIUs.

See https://osmocom.org/projects/e1-t1-adapter/wiki/E1_tracer for more details.