MISRA C:2025 Compliance Summary Tables

The CANopen Slave Protocol Stack is tested against the MISRA™ C:2025 coding standards. The results from this effort are available in these compliance summary tables.

These tables align with the published MISRA™ C:2025 Guidelines for the Use of the C Language in Critical Systems. The MISRA™ C:2025 standard consolidates these guidelines:

• MISRA C:2012 rules and directives
• Clarifications added in MISRA C:2012 Technical Corrigendum 1 (TC1) and Technical Corrigendum 2 (TC2)
• New rules and modifications added in MISRA C:2012 Amendment 1 (AMD1), Amendment 2 (AMD2), Amendment 3 (AMD3), and Amendment 4 (AMD4)
• Further updates and new rules introduced in MISRA C:2023

Directives

The Implementation

Directive	Category	Tested	Compliance	Remarks
Dir 1.1	Required	No	Compliant	by inspection

Compilation and Build

Directive	Category	Tested	Compliance	Remarks
Dir 2.1	Required	No	Compliant	by inspection

Requirements Traceability

Directive	Category	Tested	Compliance	Remarks
Dir 3.1	Required	No	Disapplied

Code Design

Directive	Category	Tested	Compliance	Remarks
Dir 4.1	Required	No	Compliant	by inspection
Dir 4.3	Required	No	Disapplied
Dir 4.6	Advisory	Yes	Compliant
Dir 4.7	Required	Yes	Compliant
Dir 4.8	Advisory	Yes	Deviation	DEV-D4.8-01
Dir 4.9	Advisory	Yes	Compliant
Dir 4.10	Required	Yes	Compliant
Dir 4.11	Required	Yes	Compliant
Dir 4.12	Required	Yes	Compliant
Dir 4.14	Required	No	Compliant	by inspection
Dir 4.15	Required	Yes	Compliant

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Rules

Standard C Environment

Rule	Category	Tested	Compliance	Remarks
Rule 1.1	Required	Yes	Compliant
Rule 1.3	Required	Yes	Compliant
Rule 1.4	Required	Yes	Compliant
Rule 1.5	Required	Yes	Compliant

Unused Code

Rule	Category	Tested	Compliance	Remarks
Rule 2.1	Required	Yes	Compliant
Rule 2.2	Required	Yes	Compliant
Rule 2.3	Advisory	Yes	Compliant
Rule 2.4	Advisory	Yes	Deviation	DEV-2.4-01, DEV-2.4-02, DEV-2.4-03, DEV-2.4-04, DEV-2.4-05
Rule 2.5	Advisory	Yes	Compliant
Rule 2.6	Advisory	Yes	Compliant
Rule 2.7	Advisory	Yes	Compliant

Comments

Rule	Category	Tested	Compliance	Remarks
Rule 3.1	Required	Yes	Compliant
Rule 3.2	Required	Yes	Compliant

Character Sets and Lexical Conventions

Rule	Category	Tested	Compliance	Remarks
Rule 4.1	Required	Yes	Compliant
Rule 4.2	Advisory	Yes	Compliant

Identifiers

Rule	Category	Tested	Compliance	Remarks
Rule 5.1	Required	Yes	Compliant
Rule 5.2	Required	Yes	Compliant
Rule 5.3	Advisory	Yes	Compliant
Rule 5.4	Required	Yes	Compliant
Rule 5.5	Required	Yes	Compliant
Rule 5.6	Required	Yes	Compliant
Rule 5.7	Required	Yes	Compliant
Rule 5.8	Required	Yes	Compliant

Types

Rule	Category	Tested	Compliance	Remarks
Rule 6.1	Required	Yes	Compliant
Rule 6.2	Required	Yes	Compliant
Rule 6.3	Required	Yes	Compliant

Literals and Constants

Rule	Category	Tested	Compliance	Remarks
Rule 7.1	Advisory	Yes	Compliant
Rule 7.2	Readability	Yes	Compliant
Rule 7.3	Readability	Yes	Compliant
Rule 7.4	Required	Yes	Compliant
Rule 7.5	Mandatory	Yes	Compliant

Declarations and Definitions

Rule	Category	Tested	Compliance	Remarks
Rule 8.1	Required	Yes	Compliant
Rule 8.2	Required	Yes	Compliant
Rule 8.3	Required	Yes	Compliant
Rule 8.4	Advisory	Yes	Compliant
Rule 8.5	Advisory	Yes	Compliant
Rule 8.6	Required	Yes	Compliant
Rule 8.8	Required	Yes	Compliant
Rule 8.9	Advisory	Yes	Deviation	DEV-8.9-01, DEV-8.9-02, DEV-8.9-03, DEV-8.9-04, DEV-8.9-05, DEV-8.9-06
Rule 8.10	Required	Yes	Compliant
Rule 8.11	Advisory	Yes	Compliant
Rule 8.12	Required	Yes	Compliant
Rule 8.14	Advisory	Yes	Compliant
Rule 8.15	Required	Yes	Compliant

Initialization

Rule	Category	Tested	Compliance	Remarks
Rule 9.1	Mandatory	Yes	Compliant
Rule 9.2	Readability	Yes	Compliant
Rule 9.3	Readability	Yes	Compliant
Rule 9.4	Required	Yes	Compliant
Rule 9.5	Readability	Yes	Compliant

The Essential Type Model

Rule	Category	Tested	Compliance	Remarks
Rule 10.1	Advisory	Yes	Compliant
Rule 10.2	Advisory	Yes	Compliant
Rule 10.3	Advisory	Yes	Compliant
Rule 10.4	Advisory	Yes	Compliant
Rule 10.5	Advisory	Yes	Compliant
Rule 10.6	Advisory	Yes	Compliant
Rule 10.7	Advisory	Yes	Compliant
Rule 10.8	Advisory	Yes	Compliant

Pointer Type Conversion

Rule	Category	Tested	Compliance	Remarks
Rule 11.1	Required	Yes	Compliant
Rule 11.2	Required	Yes	Compliant
Rule 11.3	Required	Yes	Compliant
Rule 11.5	Advisory	Yes	Compliant
Rule 11.6	Required	Yes	Compliant
Rule 11.7	Required	Yes	Compliant
Rule 11.8	Required	Yes	Compliant
Rule 11.9	Readability	Yes	Compliant

Expressions

Rule	Category	Tested	Compliance	Remarks
Rule 12.2	Required	Yes	Compliant
Rule 12.5	Mandatory	Yes	Compliant

Side Effects

Rule	Category	Tested	Compliance	Remarks
Rule 13.1	Required	Yes	Compliant
Rule 13.2	Required	Yes	Compliant
Rule 13.5	Required	Yes	Compliant
Rule 13.6	Required	Yes	Compliant

Control Statement Expressions

Rule	Category	Tested	Compliance	Remarks
Rule 14.1	Advisory	Yes	Compliant
Rule 14.2	Readability	Yes	Compliant
Rule 14.3	Required	Yes	Compliant
Rule 14.4	Advisory	Yes	Compliant

Control Flow

Rule	Category	Tested	Compliance	Remarks
Rule 15.2	Advisory	Yes	Compliant
Rule 15.3	Advisory	Yes	Compliant
Rule 15.6	Required	Yes	Compliant
Rule 15.7	Readability	Yes	Compliant

Switch Statements

Rule	Category	Tested	Compliance	Remarks
Rule 16.1	Advisory	Yes	Compliant
Rule 16.2	Advisory	Yes	Compliant
Rule 16.3	Advisory	Yes	Compliant
Rule 16.4	Advisory	Yes	Compliant
Rule 16.5	Advisory	Yes	Compliant
Rule 16.6	Advisory	Yes	Compliant
Rule 16.7	Advisory	Yes	Compliant

Functions

Rule	Category	Tested	Compliance	Remarks
Rule 17.1	Required	Yes	Compliant
Rule 17.2	Required	Yes	Compliant
Rule 17.3	Mandatory	Yes	Compliant
Rule 17.4	Mandatory	Yes	Compliant
Rule 17.5	Required	Yes	Compliant
Rule 17.6	Mandatory	Yes	Compliant
Rule 17.7	Readability	Yes	Compliant
Rule 17.9	Mandatory	Yes	Compliant
Rule 17.10	Required	Yes	Compliant
Rule 17.13	Required	Yes	Compliant

Pointers and Arrays

Rule	Category	Tested	Compliance	Remarks
Rule 18.1	Required	Yes	Compliant
Rule 18.2	Required	Yes	Compliant
Rule 18.3	Required	Yes	Compliant
Rule 18.6	Required	Yes	Compliant
Rule 18.7	Required	Yes	Compliant
Rule 18.8	Required	Yes	Compliant
Rule 18.9	Required	Yes	Compliant

Overlapping Storage

Rule	Category	Tested	Compliance	Remarks
Rule 19.1	Mandatory	Yes	Compliant
Rule 19.2	Advisory	Yes	Compliant

Preprocessing Directives

Rule	Category	Tested	Compliance	Remarks
Rule 20.1	Advisory	Yes	Compliant
Rule 20.2	Required	Yes	Compliant
Rule 20.3	Required	Yes	Compliant
Rule 20.4	Required	Yes	Compliant
Rule 20.6	Required	Yes	Compliant
Rule 20.7	Required	Yes	Compliant
Rule 20.8	Required	Yes	Compliant
Rule 20.9	Required	Yes	Compliant
Rule 20.11	Required	Yes	Compliant
Rule 20.12	Required	Yes	Compliant
Rule 20.13	Required	Yes	Compliant
Rule 20.14	Required	Yes	Compliant

Standard Libraries

Rule	Category	Tested	Compliance	Remarks
Rule 21.1	Required	Yes	Compliant
Rule 21.2	Required	Yes	Compliant
Rule 21.3	Required	Yes	Compliant
Rule 21.4	Required	Yes	Compliant
Rule 21.5	Required	Yes	Compliant
Rule 21.6	Required	Yes	Compliant
Rule 21.7	Required	Yes	Compliant
Rule 21.8	Required	Yes	Compliant
Rule 21.9	Required	Yes	Compliant
Rule 21.10	Required	Yes	Compliant
Rule 21.12	Required	Yes	Compliant
Rule 21.13	Mandatory	Yes	Compliant
Rule 21.14	Required	Yes	Compliant
Rule 21.15	Required	Yes	Compliant
Rule 21.16	Required	Yes	Compliant
Rule 21.17	Mandatory	Yes	Compliant
Rule 21.18	Mandatory	Yes	Compliant
Rule 21.19	Mandatory	Yes	Compliant
Rule 21.20	Mandatory	Yes	Compliant
Rule 21.21	Required	Yes	Compliant
Rule 21.22	Mandatory	Yes	Compliant
Rule 21.23	Required	Yes	Compliant
Rule 21.24	Required	Yes	Compliant

Resources

Rule	Category	Tested	Compliance	Remarks
Rule 22.1	Required	Yes	Compliant
Rule 22.2	Mandatory	Yes	Compliant
Rule 22.3	Required	Yes	Compliant
Rule 22.4	Mandatory	Yes	Compliant
Rule 22.5	Mandatory	Yes	Compliant
Rule 22.6	Mandatory	Yes	Compliant
Rule 22.7	Required	Yes	Compliant
Rule 22.8	Required	Yes	Compliant
Rule 22.9	Required	Yes	Compliant
Rule 22.10	Required	Yes	Compliant

Generic Selections

Rule	Category	Tested	Compliance	Remarks
Rule 23.2	Required	Yes	Compliant
Rule 23.4	Required	Yes	Compliant
Rule 23.6	Required	Yes	Compliant
Rule 23.8	Required	Yes	Compliant