timer_rp2040.h

/*
 *
 *  Created on: 01.11.2022
 *      Author: aterstegge
 */
 
#ifndef _TIMER_RP2040_H_
#define _TIMER_RP2040_H_
 
#include "timer_interface.h"
#include "RP2040.h"
 
extern "C" {
void TIMER_IRQ_0_Handler(void);
void TIMER_IRQ_1_Handler(void);
void TIMER_IRQ_2_Handler(void);
void TIMER_IRQ_3_Handler(void);
}
 
class timer_rp2040: public timer_interface {
public:
    // The index is in the range of 0...3 (4 timers).
    // When no index is given (-1), the next free timer will be used!
    explicit timer_rp2040(int8_t index = -1);
    virtual ~timer_rp2040();
 
    void setPeriod   (uint32_t us, TIMER::timer_mode mode = TIMER::ONE_SHOT) override;
    void setPeriod_ns(uint32_t ns, TIMER::timer_mode mode = TIMER::ONE_SHOT);
    uint32_t getPeriod() override;
 
    void setCallback(function<void()> f) override;
 
    void start() override;
    void stop() override;
    bool isRunning() override;
 
    void reset() override;
 
    // IRQ handlers are our best friends
    friend void TIMER_IRQ_0_Handler(void);
    friend void TIMER_IRQ_1_Handler(void);
    friend void TIMER_IRQ_2_Handler(void);
    friend void TIMER_IRQ_3_Handler(void);
 
private:
 
    void irqHandler();
 
    static timer_rp2040 *   _timerinst[4];
    static function<void()> _callback[4];
 
    uint8_t     _index;
    uint32_t    _mask;
    uint32_t *  _ALARM;
    TIMER::timer_mode _mode;
    uint32_t    _period;
    uint32_t    _tick_factor;
};
 
#endif // _TIMER_RP2040_H_