Software Specifications - Motorola M68HC08 Reference Manual

System Description
2.3.1 Software Specification
Designer Reference Manual
18
Freescale Semiconductor, Inc.
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!
Sensorless, with back-EMF zero crossing commutation
Control Algorithm
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
PC master software (remote) interface (via RS232 using PC
MCU Oscillator
4 MHz (with default software setting)
Frequency
MCU Bus
8 MHz (with default software setting)
Frequency
Minimal BLDC
Motor
Commutation
Period 333 s (with default software setting and COEF_HLFCMT =
(Without PC
Master
Software
Communication)
System Description
For More Information On This Product,
Go to: www.freescale.com
.
connected
control
control, LED indication)
computer)
0.450)
DRM028 — Rev 0
MOTOROLA