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7 FLASH - 16-bit CRC
This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given FLASH region.
7.2 Functions
7.2.2 DIAG_FLASH_ValidateCRC16
This API validates the CRC of a given FLASH memory region by re-calculating and comparing it with reference CRC stored by GUID-3ED156D9-F4F8-4DDC-A1F0-77005479EF7F.html.

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.
- 7.1 Defines
- 7.2 Functions
  - 7.2.1 DIAG_FLASH_CalculateStoreCRC16
    This API calculates 16-bit CRC for a given FLASH memory region and stores the same at FLASH address indicated by storeAddress argument.
  - 7.2.2 DIAG_FLASH_ValidateCRC16
    This API validates the CRC of a given FLASH memory region by re-calculating and comparing it with reference CRC stored by GUID-3ED156D9-F4F8-4DDC-A1F0-77005479EF7F.html.
  - 7.2.3 DIAG_FLASH_CalculateCRC16
    This API calculates 16-bit CRC with Direct Computation method for given FLASH memory region. This API will be used by GUID-3ED156D9-F4F8-4DDC-A1F0-77005479EF7F.html and GUID-9850CDA6-6F42-405C-AF9F-17A5476CC632.html.
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.
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

7.2.2 DIAG_FLASH_ValidateCRC16

This API validates the CRC of a given FLASH memory region by re-calculating and comparing it with reference CRC stored by DIAG_FLASH_CalculateStoreCRC16.

diag_crc_status_t DIAG_FLASH_ValidateCRC16(
    uint32_t startAddress,    uint32_t length,    uint32_t refAddress
)

Parameters


[in] startAddress	uint32_t - starting address of FLASH memory region to be considered for CRC
[in] length	uint32_t - number of bytes from startAddress to be considered for CRC
[in] refAddress	uint32_t - the FLASH address where reference CRC is available

Returns


diag_crc_status_t	CRC_OK= 0, CRC_ERROR= 1, CRC_INVALID_ADDRESS= 2, CRC_INVALID_LENGTH= 3