AN2390 datasheet(37/42 Pages) STMICROELECTRONICS

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AN2390

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Appendix A

A.1

Source file organization

The code is written in ‘C’ language. The Code Size is approximately 3 Kbytes. The source

code consists of 3 source files and 3 header files as listed below:

●

main.c: it consists of the main subroutine.

●

BC_func.c: These files contain the definitions of all the functions used in the main

subroutine.

●

Interrupt_vector.c: it consists of the interrupt vector mapping files.

●

BC_func.h: it consists of the declarations of all the global variables and the functions

used in the main.

●

ST7lib_config.h: It is the configuration file and also consists of the #define statements

for assembly language instructions like ‘NOP’ etc.

●

st7lites2_5_reg.h: It contains the declarations of the hardware registers.

This modular organization makes it easier to perform minor modifications to the software.

Table 10.

Examples of minor software modifications

If you want to change…

…only modify…

Voltage thresholds

BC_Func.h

PWM frequency

State update frequency

Timing thresholds

I/O Configuration

BC_InititalizePeripheral() in BC_Func.c

State diagram

BC_SlotMonitor() function in BC_Func.c

State definitions

Transition conditions

Transition priority

AN2390 Datasheet(PDF) 37 Page - STMicroelectronics