1 Preface
2 Diagnostic Library for SAM C21
3 API
- 3.1 API Overview
- 3.2 Diagnostic Mechanisms
  - 3.2.1 DIAG_CORTEX_M0
  - 3.2.2 DIAG_ADC
  - 3.2.3 DIAG_BANDGAP
  - 3.2.4 DIAG_BUSSES
  - 3.2.5 DIAG_CAN
    - 3.2.5.1 DIAG_CAN_CRCCheck
      Returns the status of the CAN_CHECKSUM diagnostic
    - 3.2.5.2 DIAG_CAN_DISABLE
      Returns the status of the CAN_DISABLE diagnostic
    - 3.2.5.3 DIAG_CAN_Enable
      Returns the status of the CAN_ENABLE diagnostic
    - 3.2.5.4 DIAG_CAN_Initialize
      Initialize the registers of the peripheral prior to functional testing.
    - 3.2.5.5 DIAG_CAN_Marching1Loopback
      Returns the status of the CAN_LOOPBACK, CAN_TIMING_MONITOR and CAN_INTERRUPTS diagnostics.
    - 3.2.5.6 DIAG_CAN_RxBuffer
      Returns the status of the CAN_RX_BUFFER diagnostic
    - 3.2.5.7 DIAG_CAN_SFRReset
      Returns the status of the SFR_RESET diagnostic
    - 3.2.5.8 DIAG_CAN_SFRWriteRead
      Returns the status of the SFR_RESET_TEST diagnostic
    - 3.2.5.9 DIAG_CAN_TimeStamps
      Returns the status of the CAN_TIMESTAMP diagnostic
    - 3.2.5.10 DIAG_CAN_Transmit1
      Returns the status of the CAN_LOOPBACK and CAN_TIMING_MONITOR diagnostics
    - 3.2.5.11 DIAG_CAN_TransmitMarching1
      Returns the status of the CAN_LOOPBACK, CAN_TIMING_MONITOR and CAN_INTERRUPTS diagnostics.
  - 3.2.6 DIAG_DAC
  - 3.2.7 DIAG_DIVAS
  - 3.2.8 DIAG_DMAC
  - 3.2.9 DIAG_DSU
  - 3.2.10 DIAG_EIC
  - 3.2.11 DIAG_FLASH
  - 3.2.12 DIAG_FREQM
  - 3.2.13 DIAG_GLCK
  - 3.2.14 DIAG_GPIO
  - 3.2.15 DIAG_MCLK
  - 3.2.16 DIAG_OSC32KCTRL
  - 3.2.17 DIAG_OSCCTRL
  - 3.2.18 DIAG_PAC
  - 3.2.19 DIAG_PM
  - 3.2.20 DIAG_POR
  - 3.2.21 DIAG_RSTC
  - 3.2.22 DIAG_RTC
  - 3.2.23 DIAG_SDADC
  - 3.2.24 DIAG_SERCOM_USART
  - 3.2.25 DIAG_SUPC
  - 3.2.26 DIAG_TC
  - 3.2.27 DIAG_TCC
  - 3.2.28 DIAG_WDT
- 3.3 Safe PLIB
  Safe PLIBs are used for setting up and controlling the operation of the peripherals.
4 Appendix - FMEDA to Diagnostic API Mapping
5 Known Issues
6 Revision History
Microchip Information

3.2.5.1 DIAG_CAN_CRCCheck

Returns the status of the CAN_CHECKSUM diagnostic

This function verifies that a message with a 1 in alternating bit positions, plus a 16-bit CRC is received correctly.

DIAG_STATUS
DIAG_CAN_CRCCheck
(
    DIAG_CAN_PERIPHS can_periph, 
    bool use_sw_crc
);

Diagnostic verifies the following faults do not exist

Communication failure due to bus

Operating Mode

Interface can be used at POST

Precondition

none

Parameters

can_periph - con instance,
use_sw_crc - use software checksum

Returns

DIAG_STATUS