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3 API
3.3 Safe PLIB
Safe PLIBs are used for setting up and controlling the operation of the peripherals.
3.3.2 SAFE_PLIB_CAN
Set of safe functions for setting up and controlling the CAN peripheral.
3.3.2.16 CANx_TxEventFifoFillLevelGet
Returns Tx FIFO Free Level.

1 Preface
2 Diagnostic Library for SAM C21
3 API
- 3.1 API Overview
- 3.2 Diagnostic Mechanisms
- 3.3 Safe PLIB
  Safe PLIBs are used for setting up and controlling the operation of the peripherals.
  - 3.3.1 SAFE_PLIB_ADC
    Set of safe functions for setting up and controlling the ADC peripheral.
  - 3.3.2 SAFE_PLIB_CAN
    Set of safe functions for setting up and controlling the CAN peripheral.
    - 3.3.2.1 CANx_ErrorCountGet
      Returns the transmit and receive error count during transfer.
    - 3.3.2.2 CANn_ErrorGet
      Returns the error during transfer.
    - 3.3.2.3 CANn_ExtendedFilterElementSet
      Set the extended filter element
    - 3.3.2.4 CANn_ExtendedFilterElementSet
      Set the extended filter element
    - 3.3.2.5 CANx_MessageReceiveFifo
      Read messages from Rx FIFO0/FIFO1..
    - 3.3.2.6 CANx_RxBufferNumberGet
      Get Rx Buffer Number.
    - 3.3.2.7 CANx_Initialize
      Initializes given instance of the CAN peripheral
    - 3.3.2.8 CANx_InterruptClear
      Clears Interrupt status
    - 3.3.2.9 CANx_InterruptSet
      Returns the Interrupt status.
    - 3.3.2.10 CANx_MessageRAMConfigSet
      Set message RAM configuration
    - 3.3.2.11 CANn_MessageReceiveFifo
      Receive CAN messages from FIFO
    - 3.3.2.12 CANx_MessageTransmitFifo
      Transmit multiple messages into CAN bus from Tx FIFO.
    - 3.3.2.13 CANn_RxFifoFillLevelGet
      Get receive buffer fill level
    - 3.3.2.14 CANn_CallbackRegister
      Registers the function to be called when an interrupt condition has been sensed on the CAN Channel.
    - 3.3.2.15 CANn_StandardFilterElementGet
      Gets the standard filter element
    - 3.3.2.16 CANx_TxEventFifoFillLevelGet
      Returns Tx FIFO Free Level.
    - 3.3.2.17 CANn_TxFifoFreeLevelGet
      Return FIFO free level
  - 3.3.3 SAFE_PLIB_DAC
    Set of safe functions for setting up and controlling the DAC peripheral.
  - 3.3.4 SAFE_PLIB_DIVAS
    Set of safe functions for setting up and controlling the DIVAS peripheral.
  - 3.3.5 SAFE_PLIB_DMAC
    Set of safe functions for setting up and controlling the DMAC peripheral.
  - 3.3.6 SAFE_PLIB_EIC
    Set of safe functions for setting up and controlling the EIC peripheral.
  - 3.3.7 SAFE_PLIB_FREQM
    Set of safe functions for setting up and controlling the FREQM peripheral.
  - 3.3.8 SAFE_PLIB_NVMCTRL
    Set of safe functions for setting up and controlling the NVMCTRL peripheral.
  - 3.3.9 SAFE_PLIB_PAC
    Set of safe functions for setting up and controlling the PAC peripheral.
  - 3.3.10 SAFE_PLIB_RSTC
    Set of safe functions for setting up and controlling the RSTC peripheral.
  - 3.3.11 SAFE_PLIB_RTC
    Set of safe functions for setting up and controlling the RTC peripheral.
  - 3.3.12 SAFE_PLIB_SDADC
    Set of safe functions for setting up and controlling the SDADC peripheral.
  - 3.3.13 SAFE_PLIB_SERCOM_USART
    Set of safe functions for setting up and controlling the USART peripheral.
  - 3.3.14 SAFE_PLIB_TC
    Set of safe functions for setting up and controlling the TC peripheral.
  - 3.3.15 SAFE_PLIB_TCC
    Set of safe functions for setting up and controlling the TCC peripheral.
  - 3.3.16 SAFE_PLIB_WDT
    Set of safe functions for setting up and controlling the WDT peripheral.
4 Appendix - FMEDA to Diagnostic API Mapping
5 Known Issues
6 Revision History
Microchip Information

3.3.2.16 CANx_TxEventFifoFillLevelGet

Returns Tx FIFO Free Level.

This routine returns Tx FIFO Free Level.

unit8_t 
CANx_TxEventFifoFillLevelGet 
(
    void
 );

Precondition

CANx_Initialize has been called.

Parameters

void

Returns

returns true if successful, otherwise false