AN3307 datasheet(16/37 Pages) STMICROELECTRONICS

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Class B software package

AN3307

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Doc ID 18186 Rev 4

Figure 2.

Control flow four-step checking principle

Note:

The unique number for the calling point for Component test 1 at the main level is defined as

5, and for the procedure itself it is defined as 7 in this example. The initial value of the

counters are set to 0 and 0xFFFFFFFF for simplicity. The table in the upper right corner of

Figure 2 shows how the counters are changed in four steps and their complementary state

after the last step of the checking policy (return from procedure) is done.

4.2

Package organization

This section describes how the ST solution is organized.

4.2.1

Projects included in the package

As well as the standard firmware and self-test libraries, the installation package includes two

projects for STM32 family - IAR’s EWARM and Keil’s MDK-ARM. The corresponding

Project.eww or Project.uvproj project file must be configured for a specific STM32Fxxx

family device before compilation.

The required linker files are predefined and the defined symbols for concrete configuration

are already declared in the preprocessor sections. For information on certain exceptions

and special cases, refer to Chapter 4.2.2: Tool-specific integration of the library.

MS18591V1

Coun ter

Coun ter_

0x00000005

0xFFFFFFFF

XOR

0xFFFFFFFA

0xFFFFFFFF

0xFFFFFFF3

0xFFFFFFF8

0xFFFFFFF4

0xFFFFFFF3

0 xFFFFFFFF

Counter = Counter + 7

Compon ent test 1

Counter_ = Counter_ - 7

Counter = Counter + 5

Counter_ = Counter _ - 5

Compon ent test 2

Compon ent test n

Flow check point

check Counter value

and Counter XOR Counter_ =

0xFFFFFFF F

Fail Safe routine

Fail

0x0000000C

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