Final Report on Dual-tone Multiple Frequency Dtmf Detector Implementation Gg Uner Arslan for Ee382c Embedded Software Systems

Dual-tone Multi-frequency DTMF signals are used in touch-tone telephones as well as many other areas such a s i n teractive control, telephone banking, and pager system. As analog telephone lines are converted to digital, researchers became interested in digital DTMF detectors. There are many digital DTMF detecting algorithms, but most of them do not comply with the related International Telecommunications Union ITU and Bellcore recommendations or are not suitable for real-time implementation. In this project, my primary aim was to implement the new DTMF algorithm proposed on a TMS320C50 digital signal processor for 24 channels. My design tool in this task was Ptolemy, to be more speciic the C50 domain, which caused several problems during the project. In order to overcome these problems, I started to write a new target for the C50 domain which is named as SimC50 due to its ability to run assembly codes on a simulator and display the results. Despite the fact that current C50 targets generate code for TI TMS320C50 DSP Starter Kit DSK, the new target generates code for TI TMS320C50 Evaluation Module EVM. At the time this report was written all the tasks of the new target except getting the results from the simulator part, were nished. Additional work was needed to modify some C50 stars because they were written for DSK only.