[136] | 1 | /*
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| 2 | Copyright (c) 2013 Arduino LLC. All right reserved.
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| 3 |
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| 4 | This library is free software; you can redistribute it and/or
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| 5 | modify it under the terms of the GNU Lesser General Public
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| 6 | License as published by the Free Software Foundation; either
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| 7 | version 2.1 of the License, or (at your option) any later version.
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| 8 |
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| 9 | This library is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | Lesser General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU Lesser General Public
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| 15 | License along with this library; if not, write to the Free Software
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| 16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | */
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| 18 |
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| 19 | #ifndef BRIDGE_H_
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| 20 | #define BRIDGE_H_
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| 21 |
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| 22 | #include <Arduino.h>
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| 23 | #include <Stream.h>
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| 24 |
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| 25 | class BridgeClass {
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| 26 | public:
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| 27 | BridgeClass(Stream &_stream);
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| 28 | void begin();
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| 29 |
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| 30 | // Methods to handle key/value datastore
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| 31 | void put(const char *key, const char *value);
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| 32 | void put(const String &key, const String &value)
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| 33 | {
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| 34 | put(key.c_str(), value.c_str());
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| 35 | }
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| 36 | unsigned int get(const char *key, uint8_t *buff, unsigned int size);
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| 37 | unsigned int get(const char *key, char *value, unsigned int maxlen)
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| 38 | {
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| 39 | return get(key, reinterpret_cast<uint8_t *>(value), maxlen);
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| 40 | }
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| 41 |
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| 42 | // Trasnfer a frame (with error correction and response)
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| 43 | uint16_t transfer(const uint8_t *buff1, uint16_t len1,
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| 44 | const uint8_t *buff2, uint16_t len2,
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| 45 | const uint8_t *buff3, uint16_t len3,
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| 46 | uint8_t *rxbuff, uint16_t rxlen);
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| 47 | // multiple inline versions of the same function to allow efficient frame concatenation
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| 48 | uint16_t transfer(const uint8_t *buff1, uint16_t len1)
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| 49 | {
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| 50 | return transfer(buff1, len1, NULL, 0);
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| 51 | }
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| 52 | uint16_t transfer(const uint8_t *buff1, uint16_t len1,
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| 53 | uint8_t *rxbuff, uint16_t rxlen)
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| 54 | {
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| 55 | return transfer(buff1, len1, NULL, 0, rxbuff, rxlen);
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| 56 | }
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| 57 | uint16_t transfer(const uint8_t *buff1, uint16_t len1,
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| 58 | const uint8_t *buff2, uint16_t len2,
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| 59 | uint8_t *rxbuff, uint16_t rxlen)
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| 60 | {
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| 61 | return transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen);
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| 62 | }
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| 63 |
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| 64 | uint16_t getBridgeVersion()
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| 65 | {
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| 66 | return bridgeVersion;
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| 67 | }
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| 68 |
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| 69 | static const int TRANSFER_TIMEOUT = 0xFFFF;
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| 70 |
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| 71 | private:
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| 72 | uint8_t index;
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| 73 | int timedRead(unsigned int timeout);
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| 74 | void dropAll();
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| 75 | uint16_t bridgeVersion;
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| 76 |
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| 77 | private:
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| 78 | void crcUpdate(uint8_t c);
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| 79 | void crcReset();
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| 80 | void crcWrite();
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| 81 | bool crcCheck(uint16_t _CRC);
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| 82 | uint16_t CRC;
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| 83 |
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| 84 | private:
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| 85 | static const char CTRL_C = 3;
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| 86 | Stream &stream;
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| 87 | bool started;
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| 88 | uint8_t max_retries;
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| 89 | };
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| 90 |
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| 91 | // This subclass uses a serial port Stream
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| 92 | class SerialBridgeClass : public BridgeClass {
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| 93 | public:
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| 94 | SerialBridgeClass(HardwareSerial &_serial)
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| 95 | : BridgeClass(_serial), serial(_serial) {
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| 96 | // Empty
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| 97 | }
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| 98 |
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| 99 | void begin(unsigned long baudrate = 250000) {
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| 100 | serial.begin(baudrate);
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| 101 | BridgeClass::begin();
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| 102 | }
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| 103 |
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| 104 | private:
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| 105 | HardwareSerial &serial;
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| 106 | };
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| 107 |
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| 108 | extern SerialBridgeClass Bridge;
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| 109 |
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| 110 | #endif /* BRIDGE_H_ */
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| 111 |
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| 112 | #include <Console.h>
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| 113 | #include <Process.h>
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