1.8.5.5 DWDT_CALLBACK Typedef

C

typedef void (*DWDT_CALLBACK) (uint32_t interruptStatus, void* context);

Summary

Pointer to a DWDT callback function

Description

This data type defines the required function signature for the DWDT callback function. Application must register a pointer to a callback function whose function signature (parameter and return value types) match the types specified by this function pointer in order to receive callback from the PLIB.

The parameters and return values are described here and a partial example implementation is provided.

Parameters


Param	Description
interruptStatus	Current status of the comparator
context	Pointer to the context that will be returned to the application when callback is invoked

Returns

None.

Example

    DWDT_WDT0_CallbackRegister (&APP_DWDT_CallbackFunction, NULL);
    void APP_DWDT_CallbackFunction(bool interruptStatus, void* context)
    {
        //Application related tasks
    }

Remarks

The context parameter contains the a handle to the client context, provided at the time the callback function was registered using the DWDT_PS_CallbackRegister function. This context handle value is passed back to the client as the "context" parameter. It can be any value (such as a pointer to the client's data) necessary to identify the client context or instance of the client that made the data transfer request.

The callback function executes in the PLIB's interrupt context. It is recommended of the application to not perform process intensive or blocking operations with in this function.