systick_timer.h

// Copyright 2024-2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
// Microchip SAM V71 implementation of the "TimeRef" API.
 
#pragma once
 
#include <satcat5/timeref.h>
#include <satcat5/cfgbus_core.h>
#include <hal_samv71/interrupt_handler.h>
 
namespace satcat5 {
    namespace sam {
        class SysTickTimer
            : public satcat5::util::TimeRef
            , public satcat5::sam::HandlerSAMV71 {
        public:
            SysTickTimer(
                const u32 cpu_freq_hz,
                const u32 tick_rate_hz);
 
            u32 raw() override;
 
            void timer_callback(satcat5::poll::OnDemand* callback);
 
        protected:
            // SysTick ISR
            void irq_event() override;
 
            // SysTick Registers
            u32* m_ctrl;
 
            // Tick Count
            unsigned int m_tick_num = 0;
 
            // Callback Function
            satcat5::poll::OnDemand* m_callback;
        };
    }  // namespace sam
}  // namespace satcat5