mpsim.txt

PIC16CXX C语言工具

	       MPSIM Software Simulator
			

	       Preface
	       
	       MPSIM is a discrete-event simulator
	       designed to imitate operation of Microchip
	       Technology's  PIC 16C54, 16C55, 16C56,
	       16C57, and to provide core simulation of
	       the PIC 16C71 and 16C84 microcontrollers.
	       It is a tool that has been created to
	       assist the user in debugging software that
	       will use any of these parts.
	       
	       A discrete-event simulator, as opposed to
	       an in-circuit emulator, is designed to aid
	       in the debugging of the general logic of
	       your software.  The MPSIM discrete-event
	       simulators allows the user to modify
	       object code and immediately re-execute,
	       inject external stimuli to the simulated
	       processor, and trace the exectution of the
	       object code.  A simulator differs from an
	       in-circuit emulator in three important
	       areas:  cost, I/O timing, and execution
	       speed.
	       
	       The cost of the debugging tool may be an
	       issue with some developers.  For this
	       reason, Microchip Technology has developed
	       this simulator to be a cost-effective tool
	       for debugging application software.  MPSIM
	       does not require any external hardware to
	       the PC, which keeps the cost at a minimum.
	       
	       External timing in MPSIM is processed only
	       once during each instruction cycle.
	       Transient signals, such as a spike on MCLR
	       at Q2 will not be simulated but may be
	       caught by an in-circuit emulator.  In
	       MPSIM, external stimulus is injected just
	       before the next instruction cycle
	       execution.
	       
	       The execution speed of a discrete-event
	       simulator is several orders of magnitude
	       less than a hardware-oriented solution.
	       Users may view slower execution speed as a
	       handicap or a blessing.  Some discrete-
	       event simulators are unacceptably slow.
	       MPSIM however, attempts to provide the
	       fastest possible simulation cycle.
	       
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	       Chapter 1 - Introduction

	       MPSIM is a discrete-event simulator
	       designed to aid you in debugging your
	       software applications for Microchip
	       Technology's PIC 16C5X and 16CXX
	       microcontrollers.
	       Whether you are an experienced user or a
	       beginner, we strongly suggest that you
	       read this chapter first since it provides
	       information about: