160 lines
4.4 KiB
C++
160 lines
4.4 KiB
C++
/*
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* Authors (alphabetical order)
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* - Andre Bernet <bernet.andre@gmail.com>
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* - Andreas Weitl
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* - Bertrand Songis <bsongis@gmail.com>
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* - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
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* - Cameron Weeks <th9xer@gmail.com>
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* - Erez Raviv
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* - Gabriel Birkus
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* - Jean-Pierre Parisy
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* - Karl Szmutny
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* - Michael Blandford
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* - Michal Hlavinka
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* - Pat Mackenzie
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* - Philip Moss
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* - Rob Thomson
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* - Romolo Manfredini <romolo.manfredini@gmail.com>
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* - Thomas Husterer
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*
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* opentx is based on code named
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* gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
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* er9x by Erez Raviv: http://code.google.com/p/er9x/,
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* and the original (and ongoing) project by
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* Thomas Husterer, th9x: http://code.google.com/p/th9x/
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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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*/
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#include "../../opentx.h"
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uint8_t uart3Mode = UART_MODE_NONE;
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Fifo<512> uart3TxFifo;
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extern Fifo<512> telemetryFifo;
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extern Fifo<28> sbusFifo;
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void uart3Setup(unsigned int baudrate)
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{
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USART_InitTypeDef USART_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIO_UART3, ENABLE);
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GPIO_PinAFConfig(GPIO_UART3, GPIO_PinSource_UART3_RX, GPIO_AF_UART3);
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GPIO_PinAFConfig(GPIO_UART3, GPIO_PinSource_UART3_TX, GPIO_AF_UART3);
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GPIO_InitStructure.GPIO_Pin = GPIO_PIN_UART3_TX | GPIO_PIN_UART3_RX;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIO_UART3, &GPIO_InitStructure);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART3, ENABLE);
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USART_InitStructure.USART_BaudRate = baudrate;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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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(UART3, &USART_InitStructure);
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USART_Cmd(UART3, ENABLE);
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USART_ITConfig(UART3, USART_IT_RXNE, DISABLE);
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USART_ITConfig(UART3, USART_IT_TXE, DISABLE);
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NVIC_EnableIRQ(USART3_IRQn);
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NVIC_SetPriority(USART3_IRQn, 7);
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}
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void uart3Init(unsigned int mode, unsigned int protocol)
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{
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USART_DeInit(USART3);
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uart3Mode = false;
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switch (mode) {
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case UART_MODE_TELEMETRY_MIRROR:
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uart3Setup(FRSKY_SPORT_BAUDRATE);
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break;
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#if defined(DEBUG)
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case UART_MODE_DEBUG:
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uart3Setup(DEBUG_BAUDRATE);
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break;
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#endif
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case UART_MODE_TELEMETRY:
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if (protocol == PROTOCOL_FRSKY_D_SECONDARY) {
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uart3Setup(FRSKY_D_BAUDRATE);
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}
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break;
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case UART_MODE_SBUS_TRAINER:
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uart3Setup(100000);
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USART3->CR1 |= USART_CR1_M | USART_CR1_PCE ;
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break;
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}
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uart3Mode = mode;
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}
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void uart3Putc(const char c)
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{
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uart3TxFifo.push(c);
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USART_ITConfig(UART3, USART_IT_TXE, ENABLE);
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}
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#if defined(DEBUG)
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void debugPutc(const char c)
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{
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if (uart3Mode == UART_MODE_DEBUG) {
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uart3Putc(c);
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}
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}
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#endif
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#define USART_FLAG_ERRORS (USART_FLAG_ORE | USART_FLAG_NE | USART_FLAG_FE | USART_FLAG_PE)
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extern "C" void USART3_IRQHandler(void)
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{
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// Send
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if (USART_GetITStatus(UART3, USART_IT_TXE) != RESET) {
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uint8_t txchar;
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if (uart3TxFifo.pop(txchar)) {
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/* Write one byte to the transmit data register */
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USART_SendData(UART3, txchar);
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}
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else {
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USART_ITConfig(UART3, USART_IT_TXE, DISABLE);
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}
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}
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// Receive
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uint32_t status = USART3->SR;
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while (status & (USART_FLAG_RXNE | USART_FLAG_ERRORS)) {
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uint8_t data = USART3->DR;
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if (!(status & USART_FLAG_ERRORS)) {
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switch (uart3Mode) {
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case UART_MODE_TELEMETRY:
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telemetryFifo.push(data);
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break;
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case UART_MODE_SBUS_TRAINER:
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sbusFifo.push(data);
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break;
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}
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}
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status = USART3->SR;
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}
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}
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