timer.h

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// Copyright (c) 2014, 임경현 (dlarudgus20)
// 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 following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.

#ifndef TIMER_H_
#define TIMER_H_

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include "linkedlist.h"

enum
{
    PIT_FREQUENCY = 1193180,
    TIMER_FREQUENCY = 1000,

    PIT_CONTROL_PORT = 0x43,
    PIT_COUNTER0_PORT = 0x40,

    PIT_CONTROL_COUNTER0 = 0x00,
    PIT_CONTROL_LSBMSBRW = 0x30,
    PIT_CONTROL_LATCH = 0x00,
    PIT_CONTROL_MODE0 = 0x00,   // Interrupt during counting
    PIT_CONTROL_MODE2 = 0x04,   // Clock rate generator
    PIT_CONTROL_BINARYCOUNTER = 0x00,
    PIT_CONTROL_BCDCOUNTER = 0x01,

    PIT_CONTROL_COUNTER0_ONCE =
        PIT_CONTROL_COUNTER0 | PIT_CONTROL_LSBMSBRW | PIT_CONTROL_MODE0 | PIT_CONTROL_BINARYCOUNTER,
    PIT_CONTROL_COUNTER0_PERIODIC =
        PIT_CONTROL_COUNTER0 | PIT_CONTROL_LSBMSBRW | PIT_CONTROL_MODE2 | PIT_CONTROL_BINARYCOUNTER,
};

typedef struct tagTimeOut
{
    union
    {
        struct tagTimeOut *pNextTimeOut;    
        LinkedListNode NoticeNode;          
    };

    uint32_t timeout;                       
    uint32_t code;                          

    LinkedList *NoticeQueue;
} TimeOut;

typedef struct tagTimerStruct
{
    volatile uint32_t TickCountLow;     
    volatile uint32_t TickCountHigh;    

    TimeOut *pTimeOutHead;              
} TimerStruct;

extern TimerStruct g_TimerStruct;

void ckTimerInitialize(void);
bool ckTimerSet(TimeOut *pTimeOut);

//TimeOut *ckTimerAllocTimeOut(uint32_t timeout, uint32_t code, LinkedList *NoticeQueue);

void ckTimerIntHandler(void);

void ckTimerBusyDirectWait_ms(uint32_t milli);

#endif /* TIMER_H_ */