Subversion Repositories openrisc_2011-10-31

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
 *
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 * this list of conditions and the disclaimer below.
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 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 */
 
//------------------------------------------------------------------------------
/// \unit
/// !Purpose
///
/// Configuration and handling of PIT.
///
/// !Usage
///
/// -# Initialize System timer for a period in µsecond with
///    PIT_Init
/// -# Set the PIT Periodic Interval Value with PIT_SetPIV
/// -# Enable the PIT with PIT_Enable
/// -# Enable & disable PIT interrupts using PIT_EnableInt and
///    PIT_DisableInt
/// -# Read PIT mode register
///    PIT_GetMode
/// -# Read PIT status register
///    PIT_GetStatus
/// -# Read PIT CPIV and PICNT without ressetting the counters
///    PIT_GetPIIR
/// -# Read System timer CPIV and PICNT without ressetting the counters
///    PIT_GetPIVR
//------------------------------------------------------------------------------
 
#ifndef PIT_H
#define PIT_H
 
//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------
 
//------------------------------------------------------------------------------
//         Exported 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