Software for Telecoms & Audio
V.21 Modem TMS320C5000 DSP Code
implements the ITU Data Modem function V.21, which provides full-duplex
data transmission at rates of up to 300b/s over the telephone network.
Duplex channel separation is achieved by band splitting. The assembler
software is operated by callable subroutines, eg for initialisation and
for per-sample processing of input/output samples and data. The user is
responsible for interfacing samples and data to hardware.
at the sample interface, the code can operate at 8.0kHz and 9.6kHz sample
rates. At the data interface, operation can be in either Asynchronous
or Synchronous mode. In Asynchronous mode, data is transferred with start
& stop bits auto-inserted/-deleted. In Synchronous mode, data is transferred
transparently, with the receiver performing clock recovery on bit transitions.
In both cases, the data can be passed in multiple-bit blocks, and the
nominal clock used is 300Hz.
- #figures are for TMS320C54x operation with the assembler interface
Availability: NOW - sale is under licence - integration support offered