Motorola M68HC08 Software Specification, Software written in C language specifications are listed

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

System Description

2.3.1	Software Specification
		The application software is practically the same for all three hardware
		platforms. The only modification needed is to include one of three
		constants that customize the hardware and motor parameter settings.
		The software (written in C language) specifications are listed in
		Table 2-1. A useful feature of the software is serial communication with
		PC master software protocol via RS232. The PC master software is PC
		computer software which allows reading and setting of all the system
		variables, and can also run html script pages to control the application
		from the PC. Another feature of the BLDC control software, is on-line
		parameter modification with PC master software, which can be used for
		software parameter tuning to a customer motor.
				.
			Table 2-1. Software Specifications
				3-phase trapezoidal BLDC motor control star or delta!
				connected
		Control Algorithm		Sensorless, with back-EMF zero crossing commutation
				control
				Speed closed loop control
				Motoring mode
		Target Processor		MC68HC908MR32
		Language		C-language with some arithmetical functions in assembler
		Compiler		Metrowerks ANSI-C/cC++ Compiler for HC08
				Manual interface (start/stop switch, speed potentiometer
		Application		control, LED indication)
		Control		PC master software (remote) interface (via RS232 using PC
				computer)
		MCU Oscillator		4 MHz (with default software setting)
		Frequency
		MCU Bus		8 MHz (with default software setting)
		Frequency
		Minimal BLDC
		Motor
		Commutation		333 ∝s (with default software setting and COEF_HLFCMT =
		Period
		(Without PC		0.450)
		Master
		Software
		Communication)
Designer Reference Manual					DRM028 — Rev 0
18		System Description			MOTOROLA

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