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3 PIC16 Diagnostic Test APIs
3.7 SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01 - CRC16
This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given FLASH region.
3.7.2 Functions
3.7.2.3 DIAG_FLASH_CalculateCRC16
Software Requirement Reference ID : SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01. This API calculates 16-bit CRC with Direct Computation method for given FLASH memory region. This API will be used by GUID-6D176811-970F-4EE9-A2FA-12532B6815EF.html and GUID-60AC24C3-51EA-480C-9227-62B7C154DC57.html.

Introduction
This document contains API documentation for the diagnostic tests included in the MPLAB® Code Configurator PIC16/18 ISO26262 Diagnostic Library.
1 Software Requirements: PIC16
2 Software Requirements: PIC18
3 PIC16 Diagnostic Test APIs
- 3.1 SW_CPU_REGISTER_RESET_STATE_CHECK_01
  This module contains functional safety diagnostics APIs for CPU Registers.
- 3.2 SW_CLOCK_PERIODIC_MONITOR_01
  Software Requirement ID: SW_CLOCK_PERIODIC_MONITOR_01 This module contains APIs to calculate and validate the frequency of the CPU clock using a reference Secondary Oscillator Crystal. It verifies the reliability of the system clock (i.e., the system clock should be neither too fast nor too slow)
- 3.3 SW_CLOCK_PERIODIC_MONITOR_02
  Software Requirement ID: SW_CLOCK_PERIODIC_MONITOR_02. This module contains APIs to calculate, store and validate the frequency of the CPU clock using a reference line frequency.
- 3.4 SW_CPU_REGISTER_TEST_01
  This module contains functional safety diagnostics APIs for CPU Registers.
- 3.5 SW_EEPROM_MEMORY_CHECKSUM_CRC_TEST_01 - CRC16
  This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given EEPROM region.
- 3.6 SW_EEPROM_MEMORY_CHECKSUM_CRC_TEST_01 - CRC32
  This module contains APIs to calculate, store and validate 32-bit CCITT CRC for a given EEPROM region.
- 3.7 SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01 - CRC16
  This module contains APIs to calculate, store and validate 16-bit CCITT CRC for a given FLASH region.
  - 3.7.1 Defines
  - 3.7.2 Functions
    - 3.7.2.1 DIAG_FLASH_CalculateStoreCRC16
      Software Requirement Reference ID : SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01. This API calculates 16-bit CRC for a given FLASH memory region and stores the same at FLASH address indicated by storeAddress argument
    - 3.7.2.2 DIAG_FLASH_ValidateCRC16
      Software Requirement Reference ID : SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01. This API validates the CRC of a given FLASH memory region by re-calculating and comparing it with reference CRC stored by GUID-6D176811-970F-4EE9-A2FA-12532B6815EF.html
    - 3.7.2.3 DIAG_FLASH_CalculateCRC16
      Software Requirement Reference ID : SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01. This API calculates 16-bit CRC with Direct Computation method for given FLASH memory region. This API will be used by GUID-6D176811-970F-4EE9-A2FA-12532B6815EF.html and GUID-60AC24C3-51EA-480C-9227-62B7C154DC57.html.
- 3.8 SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01 - CRC32
  This module contains APIs to calculate, store and validate 32-bit CCITT CRC for a given FLASH region.
- 3.9 SW_INTERRUPT_FREQUENCY_TEST_01
  This module contains functional safety diagnostics API for SW_INTERRUPT_FREQUENCY_TEST_01.
- 3.10 SW_SRAM_MARCH_TEST_01 - MarchB
  This module contains functional safety diagnostics API for SRAM March-B.
- 3.11 SW_SRAM_MARCH_TEST_01 - MarchC
  This module contains functional safety diagnostics APIs for SRAM March-C.
- 3.12 SW_SRAM_MARCH_TEST_01 - MarchC_Minus
  This module contains functional safety diagnostics APIs for SRAM March-C Minus.
- 3.13 SW_WATCHDOG_SIMPLE_TIMER_STARTUP_TEST_01
  This module contains functional safety diagnostics APIs for WatchDog Timer Test.
- 3.14 SW_WATCHDOG_WINDOWED_TIMER_STARTUP_TEST_01
  This module contains functional safety diagnostics APIs for WatchDog Timer Test.
- 3.15 File List
  Here is a list of all documented files with brief descriptions
- 3.16 Class List
  Here is a list of all documented files with brief descriptions
4 PIC18 Diagnostic Test APIs

3.7.2.3 DIAG_FLASH_CalculateCRC16

Software Requirement Reference ID : SW_FLASH_MEMORY_CHECKSUM_CRC_TEST_01. This API calculates 16-bit CRC with Direct Computation method for given FLASH memory region. This API will be used by DIAG_FLASH_CalculateStoreCRC16 and DIAG_FLASH_ValidateCRC16.

static diag_crc_status_t DIAG_FLASH_CalculateCRC16(
    uint16_t startAddress,    uint16_t length,    uint16_t * crcSeed
)

Parameters


[in] startAddress	uint16_t - starting address of FLASH memory region to be considered for CRC
[in] length	uint16_t - number of bytes from startAddress to be considered for CRC
[in, out] crcSeed	uint16_t * - pointer to initial and final CRC

Returns


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