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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Oliver Smith d0a5a5d074 checkpatch.conf: new file
Disable spacing and open brace checks, as this repository follows a
different code style.

If needed, the checkpatch file can be extended with other checks:
* get the check name from the linter output, e.g. SPACING in:
  firmware/ice40-riscv/icE1usb/fw_app.c:155: ERROR:SPACING: spaces required around that '=' (ctx:VxV)
* add a new "--ignore NAME" line to the file

Related: https://gerrit.osmocom.org/c/osmo-e1-hardware/+/26841
Related: OS#5399
Change-Id: I4d2cf2eb698b8f4e54f04e62e4dbbc37146daf88
2022-01-17 17:28:16 +00:00
contrib jenkins.sh: Fix upload of tagged releases 2022-01-16 18:10:41 +01:00
doc icE1usb: update manual to reflect firmware 0.2 (GPS-DO, 2 ports) 2022-01-17 17:16:09 +01:00
firmware/ice40-riscv icE1usb fw: Add USB control for the GPSDO function 2022-01-13 13:21:29 +01:00
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 icE1usb fw: Expose the GPS NMEA data as a CDC ACM 2022-01-13 13:21:29 +01:00
hardware e1-tracer: update BOM attributes to 1st v2 prod run parts 2020-12-27 13:01:44 +00:00
mechanical mechanical/icE1usb-case: Update ECN with 1st production run infos 2020-10-28 00:41:55 +01:00
software osmo_e1f: Allow to transmit AIS 2021-01-05 23:25:38 +01:00
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osmo-e1-hardware - Collection of various E1/TDM hardware projects

This repository hosts three different sub-projects:

* osmo-e1-xcvr (E1 LIU + magnetics)
* osmo-e1-tracer (fully integrated passive raw bitstream 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

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.