Software for Telecoms & Audio
Bell 103 Modem TMS320C5000 DSP Code
implements the data pump function of the modem Bell 103. This provides
full-duplex data transmission at 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