/* ---------------------------------------------------------------------------- * ATMEL Microcontroller Software Support * ---------------------------------------------------------------------------- * Copyright (c) 2008, Atmel Corporation * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the disclaimer below. * * Atmel's name may not be used to endorse or promote products derived from * this software without specific prior written permission. * * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ---------------------------------------------------------------------------- */ //------------------------------------------------------------------------------ /// \unit /// /// !Purpose /// /// Interface for configuration the Periodic Interval Timer (PIT) peripheral. /// /// !Usage /// /// -# Initialize the PIT with the desired period using PIT_Init(). /// Alternatively, the Periodic Interval Value (PIV) can be configured /// manually using PIT_SetPIV(). /// -# Start the PIT counting using PIT_Enable(). /// -# Enable & disable the PIT interrupt using PIT_EnableIT() and /// PIT_DisableIT(). /// -# Retrieve the current status of the PIT using PIT_GetStatus(). /// -# To get the current value of the internal counter and the number of ticks /// that have occurred, use either PIT_GetPIVR() or PIT_GetPIIR() depending /// on whether you want the values to be cleared or not. //------------------------------------------------------------------------------ #ifndef PIT_H #define PIT_H //------------------------------------------------------------------------------ // Global Functions //------------------------------------------------------------------------------ extern void PIT_Init(unsigned int period, unsigned int pit_frequency); extern void PIT_SetPIV(unsigned int piv); extern void PIT_Enable(void); extern void PIT_EnableIT(void); extern void PIT_DisableIT(void); extern unsigned int PIT_GetMode(void); extern unsigned int PIT_GetStatus(void); extern unsigned int PIT_GetPIIR(void); extern unsigned int PIT_GetPIVR(void); #endif //#ifndef PIT_H