cfgbus_piezo.h

// Copyright 2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
// ConfigBus-controlled piezoelectric buzzer
 
#pragma once
 
#include <satcat5/cfgbus_core.h>
#include <satcat5/pkt_buffer.h>
#include <satcat5/polling.h>
 
// Default buffer size for queued notes.
#ifndef SATCAT5_PIEZO_BUFFER
#define SATCAT5_PIEZO_BUFFER 32
#endif
 
namespace satcat5 {
    namespace cfg {
        class Piezo
            : public satcat5::io::EventListener
            , public satcat5::poll::Timer
        {
        public:
            Piezo(satcat5::cfg::ConfigBus* cfg,
                unsigned devaddr, unsigned regaddr = 0);
 
            void flush();
 
            inline satcat5::io::Writeable* queue() { return &m_queue; }
 
        protected:
            // Internal event handlers.
            void data_rcvd(satcat5::io::Readable* src) override;
            void timer_event() override;
            void wait();
 
            // Internal state
            satcat5::cfg::Register m_reg;           
            satcat5::io::PacketBuffer m_queue;      
            u8 m_raw[SATCAT5_PIEZO_BUFFER];         
        };
    }
}