Home
3 API
3.3 Safe PLIB
Safe PLIBs are used for setting up and controlling the operation of the peripherals.
3.3.7 SAFE_PLIB_FREQM
Set of safe functions for setting up and controlling the FREQM peripheral.
3.3.7.1 FREQM_CallbackRegister
Allows application to register a callback function.

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.
  - 3.3.3 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.
    - 3.3.7.1 FREQM_CallbackRegister
      Allows application to register a callback function.
    - 3.3.7.2 FREQM_Initialize
      Initialze FREQM peripheral as per application need.
    - 3.3.7.3 FREQM_MeasurementStart
      This function starts the frequency measurement.
  - 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

3.3.7.1 FREQM_CallbackRegister

Allows application to register a callback function.

This function allows the application to register a callback function that will be called when a frequency measurement operation has completed. The callback feature is only available if the Interrupt operation in the GUI was enabled. If a callback mechanism is desired, then a callback function should be registerd via this function before starting a frequency measurement. The application can read the measured frequency value and the check for errors in the callback function. Calling this function at any time with callback function as NULL will disable the callback feature.

void 
FREQM_CallbackRegister
(
    FREQM_CALLBACK  freqmCallback, 
    uintptr_t context
);

Precondition

The FREQM_Initialize function must have been called. Interrupt option in MCC should have been enabled.

Parameters

freqmCallback - Pointer to an application callback function
context - The value of parameter will be passed back to the applicationunchanged, when the callback function is called. It can be used to identify any application specific data object that identifies the instance of the client module (for example, it may be a pointer to the client modules state structure)

Returns

void