mirror of
https://github.com/lowobservable/coax.git
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40 lines
1.6 KiB
C++
40 lines
1.6 KiB
C++
// Copyright (c) 2019, Andrew Kay
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#pragma once
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#define ERROR_TX_RECEIVER_ACTIVE -1
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#define ERROR_RX_TIMEOUT -2
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#define ERROR_RX_OVERFLOW -3
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#define ERROR_RX_RECEIVER -4
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class CoaxTransceiver {
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public:
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static void setup();
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static int /* ssize_t */ transmitReceive(uint16_t *transmitBuffer, size_t transmitBufferCount, uint16_t *receiveBuffer, size_t receiveBufferSize, uint16_t receiveTimeout);
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private:
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static void dataBusSetup();
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static void rxSetup();
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static void txSetup();
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static int /* ssize_t */ transmit(uint16_t *buffer, size_t bufferCount);
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static int /* ssize_t */ receive(uint16_t *buffer, size_t bufferSize, uint16_t timeout);
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static void rxActiveInterrupt();
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static volatile uint8_t rxState;
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static volatile uint16_t *rxBuffer;
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static volatile size_t rxBufferSize;
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static volatile int /* ssize_t */ rxBufferCount;
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};
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