第5章msp430 15汇编语言教程使用说明仪器内政.pdf

MSP430 Teaching Materials Chapter 15 Advanced Laboratories MSP430 assembly language tutorial: Instructions Texas Instruments orporated University of Beira Interior (PT) Pedro Dinis Gaspar, António Espírito Santo, Bruno Ribeiro, Humberto Santos University of Beira Interior, Electromechanical Engineering Department Copyright 2009 Texas Instruments s Contents ❑ Introduction ❑ System status flags ❑ Arithmetic and logic operations ❑ Program flow control ❑ Stack pointer management ❑ Routines ❑ Interrupts Copyright 2009 Texas Instruments s 2 Introduction ❑ The following section introduces some fundamentals of assembly language programming using the MSP430 family of microcontrollers; ❑ Rather than to make an exhaustive study of programming methodologies and techniques, the intention is to focus on the aspects of assembly language programming relevant to the MSP430 family; ❑ The examples are based on the MSP430 CPU, although they c so be applied to the MSP430X CPU; ❑ Where appropriate, differences between the MSP430 C nd the MSP430X C re highlighted. Copyright 2009 Texas Instruments s 3 System status flags (1/7) ❑ Modification of bits: ▪ The state of one or more bits of a value can be changed by the bit clear (BIC) and bit set (BIS) instructions, as described below; ▪ The BIC instruction clears one or more bits of the