timer_rp2350.h

// ---------------------------------------------
//           This file is part of
//      _  _   __    _   _    __    __
//     ( \/ ) /__\  ( )_( )  /__\  (  )
//      \  / /(__)\  ) _ (  /(__)\  )(__
//      (__)(__)(__)(_) (_)(__)(__)(____)
//
//     Yet Another HW Abstraction Library
//      Copyright (C) Andreas Terstegge
//      BSD Licensed (see file LICENSE)
//
// ---------------------------------------------
//
// Timer implementation for RP2350.
//
#ifndef _TIMER_RP2350_H_
#define _TIMER_RP2350_H_
 
#include "timer_interface.h"
#include "RP2350.h"
 
using namespace _TIMER0_;
 
extern "C" {
void TIMER0_IRQ_0_Handler(void);
void TIMER0_IRQ_1_Handler(void);
void TIMER0_IRQ_2_Handler(void);
void TIMER0_IRQ_3_Handler(void);
void TIMER1_IRQ_0_Handler(void);
void TIMER1_IRQ_1_Handler(void);
void TIMER1_IRQ_2_Handler(void);
void TIMER1_IRQ_3_Handler(void);
}
 
class timer_rp2350: public timer_interface {
public:
    // The index is in the range of 0...7 (8 timers).
    // When no index is given (-1), the next free timer will be used!
    explicit timer_rp2350(int8_t index = -1);
    ~timer_rp2350() override;
 
    void setPeriod   (uint32_t us, TIMER::timer_mode mode) override;
    void setPeriod_ns(uint32_t ns, TIMER::timer_mode mode);
    uint32_t getPeriod() override;
 
    void setCallback(function<void()> f) override;
 
    void start() override;
    void stop() override;
    bool isRunning() override;
 
    void reset() override;
 
    inline uint8_t getIndex() { return _index; }
 
    // IRQ handlers are our best friends
    friend void TIMER0_IRQ_0_Handler(void);
    friend void TIMER0_IRQ_1_Handler(void);
    friend void TIMER0_IRQ_2_Handler(void);
    friend void TIMER0_IRQ_3_Handler(void);
    friend void TIMER1_IRQ_0_Handler(void);
    friend void TIMER1_IRQ_1_Handler(void);
    friend void TIMER1_IRQ_2_Handler(void);
    friend void TIMER1_IRQ_3_Handler(void);
 
private:
 
    void irqHandler();
 
    static timer_rp2350 *   _timerinst[8];
    static function<void()> _callback[8];
 
    TIMER0_t *  _timer {nullptr};
    uint32_t *  _alarm {nullptr};
    uint8_t     _index {0};
    uint32_t    _mask  {0};
    TIMER::timer_mode _mode;
    uint32_t    _period {0};
};
 
#endif // _TIMER_RP2350_H_