Note: it is required that you are familiar with the MSP430 instruction set and addressing modes to be able to solve this problem. We assume that the string is no longer than 255 characters, so the result can be displayed on an 8-bit port. 2. Count Characters: Assembly Code Figure 1 shows the assembly code for this program.

Chapter 5 MSP430 ISA The Instruction Set. Topics to Cover. MSP430 ISA Assembler Primer Instruction Formats Double Operand Instructions Single Operand Instructions Jump Instructions Addressing Modes Instruction Length Instruction Cycles Instruction Disassembly Chapter 05 - MSP430 ISA 2. BYU CS/ECEn 124 instructions for processing by the CPU core: double operand, single operand, and jumps. Single and double operand instructions process word (16-bits) or byte (8-bit) data operations. (Default is word) Complete orthogonal instruction set - Although the MSP430 architecture implements only 27 instructions, MSP430 Instruction Set Architecture. MSP430 CPU specifically designed to allow the use of modern programming techniques, such as: the computation of jump addresses. data processing in tables. use of high-level languages such as C. 64KB memory space with 16 16-bit registers that reduce fetches to memory. The chapter describes the central processing unit (CPU) of the MSP430 and its most closely associated modules, the clock generator and reset circuitry. The earlier parts of the chapter, which cover the CPU and its instruction set, will be of most interest to assembly language programmers. On the Table 1a: The complete MSP430 instruction set of 27 core instructions core instruction mnemonics core instruction binary Single-operand arithmetic 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1 0 0 0 0 1 0 0 opcode B/ W As source RRC Rotate right through carry 0 0 0 1 0 0 0 0 0 B/ W As source SWPB Swap bytes 0 0 0 1 0 0 0 0 1 0 As source MSP430 - Architecture MSP430 - Addressing Modes MSP430 - Functions MSP430 - Interrupts AVR Microcontroller Question