mirror of
https://github.com/opentx/opentx.git
synced 2025-07-23 08:15:17 +03:00
151 lines
4.4 KiB
C++
151 lines
4.4 KiB
C++
/*
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* Copyright (C) OpenTX
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*
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* Based on code named
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "opentx.h"
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Fifo<uint8_t, 64> btTxFifo;
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Fifo<uint8_t, 64> btRxFifo;
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#if defined(PCBX7) || defined(PCBXLITE)
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volatile uint8_t btChipPresent = 0;
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#endif
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enum BluetoothWriteState
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{
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BLUETOOTH_WRITE_IDLE,
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BLUETOOTH_WRITE_INIT,
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BLUETOOTH_WRITING,
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BLUETOOTH_WRITE_DONE
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};
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volatile uint8_t bluetoothWriteState = BLUETOOTH_WRITE_IDLE;
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void bluetoothInit(uint32_t baudrate)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = BT_EN_GPIO_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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GPIO_Init(BT_EN_GPIO, &GPIO_InitStructure);
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#if defined(BT_BRTS_GPIO_PIN)
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GPIO_InitStructure.GPIO_Pin = BT_BRTS_GPIO_PIN;
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GPIO_Init(BT_BRTS_GPIO, &GPIO_InitStructure);
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GPIO_SetBits(BT_BRTS_GPIO, BT_BRTS_GPIO_PIN);
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#endif
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#if defined(BT_BCTS_GPIO_PIN)
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GPIO_InitStructure.GPIO_Pin = BT_BCTS_GPIO_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_Init(BT_BCTS_GPIO, &GPIO_InitStructure);
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#endif
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GPIO_PinAFConfig(BT_GPIO_TXRX, BT_TX_GPIO_PinSource, BT_GPIO_AF);
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GPIO_PinAFConfig(BT_GPIO_TXRX, BT_RX_GPIO_PinSource, BT_GPIO_AF);
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GPIO_InitStructure.GPIO_Pin = BT_TX_GPIO_PIN | BT_RX_GPIO_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(BT_GPIO_TXRX, &GPIO_InitStructure);
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USART_DeInit(BT_USART);
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USART_InitTypeDef USART_InitStructure;
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USART_InitStructure.USART_BaudRate = baudrate;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
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USART_Init(BT_USART, &USART_InitStructure);
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USART_Cmd(BT_USART, ENABLE);
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USART_ITConfig(BT_USART, USART_IT_RXNE, ENABLE);
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NVIC_SetPriority(BT_USART_IRQn, 6);
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NVIC_EnableIRQ(BT_USART_IRQn);
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btRxFifo.clear();
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btTxFifo.clear();
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bluetoothWriteState = BLUETOOTH_WRITE_IDLE;
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GPIO_ResetBits(BT_EN_GPIO, BT_EN_GPIO_PIN); // open bluetooth
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}
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void bluetoothDone()
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{
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GPIO_SetBits(BT_EN_GPIO, BT_EN_GPIO_PIN); // close bluetooth
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}
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extern "C" void BT_USART_IRQHandler(void)
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{
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DEBUG_INTERRUPT(INT_BLUETOOTH);
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if (USART_GetITStatus(BT_USART, USART_IT_RXNE) != RESET) {
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USART_ClearITPendingBit(BT_USART, USART_IT_RXNE);
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uint8_t byte = USART_ReceiveData(BT_USART);
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btRxFifo.push(byte);
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#if defined(PCBX7) || defined(PCBXLITE)
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if (!btChipPresent) {
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// This is to differentiate X7 and X7S and X-Lite with/without BT
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btChipPresent = 1;
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bluetoothDone();
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}
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#endif
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}
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if (USART_GetITStatus(BT_USART, USART_IT_TXE) != RESET) {
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uint8_t byte;
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bool result = btTxFifo.pop(byte);
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if (result) {
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USART_SendData(BT_USART, byte);
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}
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else {
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USART_ITConfig(BT_USART, USART_IT_TXE, DISABLE);
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bluetoothWriteState = BLUETOOTH_WRITE_DONE;
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}
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}
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}
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void bluetoothWriteWakeup(void)
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{
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if (bluetoothWriteState == BLUETOOTH_WRITE_IDLE) {
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if (!btTxFifo.isEmpty()) {
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bluetoothWriteState = BLUETOOTH_WRITE_INIT;
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#if defined(BT_BRTS_GPIO_PIN)
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GPIO_ResetBits(BT_BRTS_GPIO, BT_BRTS_GPIO_PIN);
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#endif
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}
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}
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else if (bluetoothWriteState == BLUETOOTH_WRITE_INIT) {
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bluetoothWriteState = BLUETOOTH_WRITING;
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USART_ITConfig(BT_USART, USART_IT_TXE, ENABLE);
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}
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else if (bluetoothWriteState == BLUETOOTH_WRITE_DONE) {
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bluetoothWriteState = BLUETOOTH_WRITE_IDLE;
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#if defined(BT_BRTS_GPIO_PIN)
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GPIO_SetBits(BT_BRTS_GPIO, BT_BRTS_GPIO_PIN);
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#endif
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}
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}
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uint8_t bluetoothIsWriting(void)
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{
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return bluetoothWriteState != BLUETOOTH_WRITE_IDLE;
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}
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