Interfacing C and TMS320C6713 Assembly Language (Part II)

Abstract

In this paper, an interfacing of C and the assembly language of TMS320C6713 is presented. Similarly, interfacing of C with the assembly language of Motorola 68020 (MC68020) microprocessor is also presented for comparison. However, it should be noted that the way the C compiler passes arguments from the main function in C to the TMS320C6713 assembly language subroutine is totally different from the way the C compiler passes arguments in a conventional microprocessor such as MC68020. Therefore, it is very important for a user of the TMS320C6713-based system to properly understand and follow the register conventions and stack operation when interfacing C with the TMS320C6713 assembly language subroutine. This paper describes the application of special registers and stack in the interfacing of these programming languages. Working examples of C and their implementation in the TMS320C6713 assembly language are described in detail. Finally, the concept presented in this paper has been tested extensively by examining different examples under various conditions and has proved highly reliable in operation.