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4 PIC18 Diagnostic Test APIs
4.12 SW_SRAM_MARCH_TEST_01 - MarchC_Minus
This module contains functional safety diagnostics APIs for SRAM March-C Minus. .
4.12.1 Functions
4.12.1.2 DIAG_SRAM_MarchC_Minus
Software Requirement Reference ID : SW_SRAM_MARCH_TEST_01.

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
4 PIC18 Diagnostic Test APIs
- 4.1 SW_CPU_REGISTER_RESET_STATE_CHECK_01.
  This module contains functional safety diagnostics APIs for CPU Registers .
- 4.2 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. The Clock test implements the SW_CLOCK_PERIODIC_MONITOR_01 SW REQ. ID by using time-slot monitoring technique.. It verifies the reliability of the system. clock (i.e., the system clock should be neither too fast nor too slow)
- 4.3 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.
- 4.4 SW_CPU_REGISTER_TEST_01
  This module contains functional safety diagnostics APIs for CPU Registers .
- 4.5 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. .
- 4.6 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.
- 4.7 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 .
- 4.8 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. .
- 4.9 SW_INTERRUPT_FREQUENCY_TEST_01
  This module contains functional safety diagnostics API for Interrupt Frequency Test.
- 4.10 SW_SRAM_MARCH_TEST_01 - MarchB
  This module contains functional safety diagnostics API for SRAM March-B. .
- 4.11 SW_SRAM_MARCH_TEST_01 - MarchC
  This module contains functional safety diagnostics APIs for SRAM March-C. .
- 4.12 SW_SRAM_MARCH_TEST_01 - MarchC_Minus
  This module contains functional safety diagnostics APIs for SRAM March-C Minus. .
  - 4.12.1 Functions
    - 4.12.1.1 MarchC_Minus_Global
      This function runs the March C- test on the 14 RAM addresses used to run the rest of the March C- test.
    - 4.12.1.2 DIAG_SRAM_MarchC_Minus
      Software Requirement Reference ID : SW_SRAM_MARCH_TEST_01.
- 4.13 SW_WATCHDOG_SIMPLE_TIMER_STARTUP_TEST_01
  This module contains functional safety diagnostics APIs for WatchDog Timer Test. .
- 4.14 SW_WATCHDOG_WINDOWED_TIMER_STARTUP_TEST_01
  This module contains functional safety diagnostics APIs for WatchDog Timer Test .
- 4.15 File List
  Here is a list of all documented files with brief descriptions
- 4.16 Class List
  Here is a list of all documented files with brief descriptions

4.12.1.2 DIAG_SRAM_MarchC_Minus

Software Requirement Reference ID : SW_SRAM_MARCH_TEST_01.

This API implements the March C test on the SRAM. It is a complete and irredundant test capable of detecting stuck-at faults, addressing faults, transition faults, and coupling faults. Since this test is a destructive test, DIAG_MarchBufferAddress is used to save and restore user memory during the test.

diag_sram_status_t DIAG_SRAM_MarchC_Minus(
    uint16_t startAddress,    uint16_t length,    uint16_t bufferAddress
)

Parameters


[in] startAddress	uint16_t - pointer to an array declared in user memory for test
[in] length	uint16_t - number of bytes to test
[in] bufferAddress	uint16_t - pointer to location in memory where array will be stored during test

Returns


diag_sram_status_t	diag_sram_status_t SRAM_OK= 0 - Success SRAM_ERROR= 1 - Failure SRAM_GLOBAL_ERROR= 2 - Failure at test variables SRAM_ADDR_ERROR= 3 - Invalid address SRAM_LENGTH_ERROR= 4 - Invalid length