radio/src/bluetooth.h

   1 /*
   2  * Copyright (C) OpenTX
   3  *
   4  * Based on code named
   5  *   th9x - http://code.google.com/p/th9x
   6  *   er9x - http://code.google.com/p/er9x
   7  *   gruvin9x - http://code.google.com/p/gruvin9x
   8  *
   9  * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 enum BluetoothStates {
  22 #if defined(PCBX9E)
  23   BLUETOOTH_INIT,
  24   BLUETOOTH_WAIT_TTM,
  25   BLUETOOTH_WAIT_BAUDRATE_CHANGE,
  26 #endif
  27   BLUETOOTH_STATE_OFF,
  28   BLUETOOTH_STATE_FACTORY_BAUDRATE_INIT,
  29   BLUETOOTH_STATE_BAUDRATE_SENT,
  30   BLUETOOTH_STATE_BAUDRATE_INIT,
  31   BLUETOOTH_STATE_NAME_SENT,
  32   BLUETOOTH_STATE_POWER_SENT,
  33   BLUETOOTH_STATE_ROLE_SENT,
  34   BLUETOOTH_STATE_IDLE,
  35   BLUETOOTH_STATE_DISCOVER_REQUESTED,
  36   BLUETOOTH_STATE_DISCOVER_SENT,
  37   BLUETOOTH_STATE_DISCOVER_START,
  38   BLUETOOTH_STATE_DISCOVER_END,
  39   BLUETOOTH_STATE_BIND_REQUESTED,
  40   BLUETOOTH_STATE_CONNECT_SENT,
  41   BLUETOOTH_STATE_CONNECTED,
  42   BLUETOOTH_STATE_DISCONNECTED,
  43   BLUETOOTH_STATE_CLEAR_REQUESTED,
  44   BLUETOOTH_STATE_FLASH_FIRMWARE
  45 };
  46
  47 #define LEN_BLUETOOTH_ADDR              16
  48 #define MAX_BLUETOOTH_DISTANT_ADDR      6
  49 #define BLUETOOTH_PACKET_SIZE          14
  50 #define BLUETOOTH_LINE_LENGTH          32
  51
  52 class Bluetooth
  53 {
  54   public:
  55     void writeString(const char * str);
  56     char * readline(bool error_reset = true);
  57     void write(const uint8_t * data, uint8_t length);
  58
  59     void forwardTelemetry(const uint8_t * packet);
  60     void wakeup();
  61     const char * flashFirmware(const char * filename);
  62
  63     volatile uint8_t state;
  64     char localAddr[LEN_BLUETOOTH_ADDR+1];
  65     char distantAddr[LEN_BLUETOOTH_ADDR+1];
  66
  67   protected:
  68     void pushByte(uint8_t byte);
  69     uint8_t read(uint8_t * data, uint8_t size, uint32_t timeout=1000/*ms*/);
  70     void appendTrainerByte(uint8_t data);
  71     void processTrainerFrame(const uint8_t * buffer);
  72     void processTrainerByte(uint8_t data);
  73     void sendTrainer();
  74     void receiveTrainer();
  75
  76     uint8_t bootloaderChecksum(uint8_t command, const uint8_t * data, uint8_t size);
  77     void bootloaderSendCommand(uint8_t command, const void *data = nullptr, uint8_t size = 0);
  78     void bootloaderSendCommandResponse(uint8_t response);
  79     const char * bootloaderWaitCommandResponse(uint32_t timeout=1000/*ms*/);
  80     const char * bootloaderWaitResponseData(uint8_t *data, uint8_t size);
  81     const char * bootloaderSetAutoBaud();
  82     const char * bootloaderReadStatus(uint8_t &status);
  83     const char * bootloaderCheckStatus();
  84     const char * bootloaderSendData(const uint8_t * data, uint8_t size);
  85     const char * bootloaderEraseFlash(uint32_t start, uint32_t size);
  86     const char * bootloaderStartWriteFlash(uint32_t start, uint32_t size);
  87     const char * bootloaderWriteFlash(const uint8_t * data, uint32_t size);
  88     const char * doFlashFirmware(const char * filename);
  89
  90     uint8_t buffer[BLUETOOTH_LINE_LENGTH+1];
  91     uint8_t bufferIndex = 0;
  92     tmr10ms_t wakeupTime = 0;
  93     uint8_t crc;
  94 };
  95
  96 extern Bluetooth bluetooth;