Home
Modems
Telephony
Audio
Utilities
Consultancy
Glossary
Index
Contact us

R2 Transmitter TMS320C5000 DSP Code

Description: generates dual-tone signals to ITU Q.441 R2 signalling format. R2 transmission is done by choosing tone-pair combinations from the following two 6-tone groups:

The composite tone signal can send one of 15 digits (6C2 = 15) in each direction according to the digit code set.
         The software is in the form of three callable subroutines: one sets common-channel default parameters, one initialises per-channel memory, and one is for per-sample tone-pair generation from the digit supplied at routine entry. Sample rates of 8.0kHz or 9.6kHz can be set. The transmit power is made user-programmable.
         The software can be operated in a multi-channel mode: a pointer is set to each per-channel block of memory at each sub-routine call. By making multiple sub-routine calls, the code can also generate blocks of samples. A C-callable wrapper can also be provided, wherein individual channels can be called from C to generate multiple sample blocks.

Specification: The value PT is user-programmable.

Processor Load:

- #figures are for TMS320C54x operation with the assembler interface at 8.0kHz sampling

Availability: NOW - sale is under licence - integration support offered