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9 Interrupt Frequency Test
This module contains functional safety diagnostics API for Interrupt Frequency Test.
9.1 Structs
9.1.1 diag_interrupt_params_t Struct
This structure holds the initial and runtime values of all the parameters required for interrupt frequency diagnosis performed by DIAG_INTERRUPT_Frequency function. Initially, for each interrupt that is registered and to be monitored for the frequency test, the structure parameters are initialized with user defined values received in DIAG_INTERRUPT_Register API. Later, when test is running, parameters are continuously updated to hold the actual values to be used to evaluate the test.

Introduction
This document contains API documentation for the diagnostic tests included MPLAB® Code Configurator AVR® IEC60730 Class B Diagnostic Library.
1 Software Requirements
2 Clock Frequency Test
This module contains functional safety diagnostics APIs for Clock Frequency test.
3 CPU Program Counter
This module contains functional safety diagnostics APIs for CPU Program counter test.
4 CPU Registers
This module contains functional safety diagnostics APIs for CPU Registers.
5 EEPROM - 16-bit CRC
This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given EEPROM region.
6 EEPROM - 32-bit CRC
This module contains APIs to calculate, store and validate 32-bit CCITT CRC for a given EEPROM region.
7 FLASH - 16-bit CRC
This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given FLASH region.
8 FLASH - 32-bit CRC
This module contains APIs to calculate, store and validate 32-bit CCITT CRC for a given FLASH region.
9 Interrupt Frequency Test
This module contains functional safety diagnostics API for Interrupt Frequency Test.
- 9.1 Structs
  - 9.1.1 diag_interrupt_params_t Struct
    This structure holds the initial and runtime values of all the parameters required for interrupt frequency diagnosis performed by DIAG_INTERRUPT_Frequency function. Initially, for each interrupt that is registered and to be monitored for the frequency test, the structure parameters are initialized with user defined values received in DIAG_INTERRUPT_Register API. Later, when test is running, parameters are continuously updated to hold the actual values to be used to evaluate the test.
- 9.2 Enums
- 9.3 Functions
10 SRAM - Checkerboard Algorithm
This module contains functional safety diagnostics APIs for SRAM Checkerboard Test.
11 SRAM - March C-Minus Algorithm
This module contains functional safety diagnostics APIs for SRAM March-C Minus.
12 Simple Watchdog Timer
This module contains functional safety diagnostics APIs for WatchDog Timer Test.
13 Windowed Watchdog Timer
This module contains functional safety diagnostics APIs for WatchDog Timer Test.
14 File List
Here is a list of all documented files with brief descriptions
15 Class List
Here is a list of all documented files with brief descriptions

9.1.1 diag_interrupt_params_t Struct

This structure holds the initial and runtime values of all the parameters required for interrupt frequency diagnosis performed by DIAG_INTERRUPT_Frequency function. Initially, for each interrupt that is registered and to be monitored for the frequency test, the structure parameters are initialized with user defined values received in DIAG_INTERRUPT_Register API. Later, when test is running, parameters are continuously updated to hold the actual values to be used to evaluate the test.

Members

diag_interrupt_id_t intr_id: This is the unique module Interrupt Identifier for every interrupt source as listed in diag_config.h
uint16_t intr_counter: This is the counter that gets incremented in the ISR of the respective interrupt. This holds the actual number of interrupts occured in the current monitoring period defined by reference RTC interrupt.
uint16_t intr_ref_counter: This holds the number of interrupts expected to occur within a given monitoring period.
uint16_t intr_counter_tolerance: The tolerance band for the number of interrupts which occur in the defined FDTI. This parameters holds the user defined tolerence for intr_ref_counter(structdiag__interrupt__params__t) .
uint16_t intr_fdti_counter: This is the Fualt Detection Time Interval for the interrupt registered for monitoring. FDTI is the time interval between the occurrence of a fault and its detection. This count gets decremented every time reference ISR is called. When this counter reaches zero, means its time to check the intr_counter(structdiag__interrupt__params__t) with expected intr_ref_counter(structdiag__interrupt__params__t) for interrupt under test with given intr_counter_tolerance(structdiag__interrupt__params__t) .
uint16_t intr_fdti
diag_interrupt_test_status_t Enum intr_test_status: This indicates the status of interrupt monitoring.
diag_interrupt_mon_status_t Enum intr_mon_status: This indicates if interrupt is being monitored or is being ignored from monitoring. When faulire is detected for any registered interrupt, diagnostic test will stop monitoring that interrupt by setting this variable to