50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
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#pragma once
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#include <Arduino.h>
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constexpr uint8_t PACKET_SIZE = 16;
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constexpr uint8_t PACKET_RINGBUF_SIZE = 16;
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// Will parse serial messages using the serial interface supplied by the dev board
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// Expects packets of at max 16 bytes.
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// Terminating byte must be 0x0A.
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// Singleton-class
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class UartHandler
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{
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public:
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static UartHandler& getInstance();
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// Will attempt to initialize the serial port, returns status.
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// May block up to 1000ms.
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bool init(const uint32_t baudRate);
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void close();
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void poll();
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// Will write the next available whole line into char* (provide at least 16 bytes!)
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// Returns whether any data was written.
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// If data available is longer than 16 bytes, an error will be raised.
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bool getNextPacket(char* dest);
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// Returns how many packets are ready for reading
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uint8_t getNumAvailablePackets() const;
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bool isOpen() const noexcept;
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private:
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// Will move the current contents of inBuf into packetRingBuf. Does NOT reset inBufPos!
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void pushPacket();
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UartHandler() noexcept;
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UartHandler(const UartHandler&) = delete;
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UartHandler(UartHandler&&) = delete;
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~UartHandler();
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// By spec, packets will not exceed 16 bytes
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uint8_t inBuf[PACKET_SIZE];
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uint8_t inBufPos = 0;
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uint8_t packetRingBuf[PACKET_RINGBUF_SIZE * PACKET_SIZE];
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uint8_t packetRingBufReadPos = 0; // 0 to PACKET_RINGBUF_SIZE
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uint8_t packetRingBufWritePos = 0; // 0 to PACKET_RINGBUF_SIZE
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uint8_t numPacketsAvailable = 0;
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};
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