23/27

LOW-COST DOUBLE LI-ION BATTERY CHARGER USING ST6255C/ST6265C MCU

2.4.5 Source File Organisation

Code is written in RIDE MAST6 assembly language. It consists of five files:

s

1 program file main.st6 (main routine, subroutines, interrupt service routines and interrupt

vector definitions);

s

1 variable definition file vars.st6

s

3 header files:

– IOs.inc (definitions of I/O configuration constants),

– vars.inc (declarations of variables),

– params.inc (definitions of application parameter constants).

Table 6. Example of Minor Software Modifications

If you want to change…

…only modify…

Voltage thresholds

params.inc

PWM frequency

State update frequency

Timing thresholds

I/O configuration

IOs.inc

State diagram

state constant definitions

and monitor subroutine

in main.st6

State definitions

Transition conditions

Transition priority