E1 related hardware projects (icE1usb, osmo-e1-tap, osmo-e1-xcvr, osmo-e1-tracer)
https://osmocom.org/projects/e1-t1-adapter/wiki
Harald Welte
cac342af6b
doing so significantly simplifies the development of a Linux kernel driver, as the GPS-DO only exists once (not twice, like the per-E1-line interface), and Linux kernel USB drivers typically are for an interface. There is an option to write a usb_device_driver, but doing so will exclude the per-interface drivers from still being probed in their usual fashion. While we introduce this new USB Interface for the GPS-DO, we also move the related control endpoint requests from the device level to the interface level. Finally, some naming inconsistency between "enum ice1usb_gpsdo_antenna_state" vs. the member name antenna_status is resolved. Change-Id: Icd6555a14896c38626fb147b78af44ff719f2254 |
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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.