120 lines
3.2 KiB
C++
120 lines
3.2 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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#include <stdarg.h>
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/** Usart Hw interface used by the console (UART0). */
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#define SECOND_SERIAL_UART UART0
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/** Usart Hw ID used by the console (UART0). */
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#define SECOND_SERIAL_ID ID_UART0
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/** Pins description corresponding to Rxd,Txd, (UART pins) */
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#define SECOND_SERIAL_PINS {PINS_UART}
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Fifo<uint8_t, 512> serial2RxFifo;
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#if !defined(SIMU)
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/*
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* Outputs a character on the UART line.
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*
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* This function is synchronous (i.e. uses polling).
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* c Character to send.
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*/
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void serial2Putc(const char c)
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{
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Uart *pUart = SECOND_SERIAL_UART;
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/* Wait for the transmitter to be ready */
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while ( (pUart->UART_SR & UART_SR_TXEMPTY) == 0 ) ;
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/* Send character */
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pUart->UART_THR = c;
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}
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uint8_t serial2TracesEnabled()
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{
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return false;
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}
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/**
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* Configures a UART peripheral with the specified parameters.
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*
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* baudrate Baudrate at which the UART should operate (in Hz).
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* masterClock Frequency of the system master clock (in Hz).
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* uses PA9 and PA10, RXD2 and TXD2
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*/
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void SECOND_UART_Configure(uint32_t baudrate, uint32_t masterClock)
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{
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register Uart *pUart = SECOND_SERIAL_UART;
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/* Configure PIO */
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configure_pins( (PIO_PA9 | PIO_PA10), PIN_PERIPHERAL | PIN_INPUT | PIN_PER_A | PIN_PORTA | PIN_NO_PULLUP ) ;
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/* Configure PMC */
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PMC->PMC_PCER0 = 1 << SECOND_SERIAL_ID;
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/* Reset and disable receiver & transmitter */
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pUart->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX
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| UART_CR_RXDIS | UART_CR_TXDIS;
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/* Configure mode */
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pUart->UART_MR = 0x800 ; // NORMAL, No Parity
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/* Configure baudrate */
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/* Asynchronous, no oversampling */
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pUart->UART_BRGR = (masterClock / baudrate) / 16;
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/* Disable PDC channel */
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pUart->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
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/* Enable receiver and transmitter */
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pUart->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
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pUart->UART_IER = UART_IER_RXRDY;
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NVIC_EnableIRQ(UART0_IRQn);
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}
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void SECOND_UART_Stop()
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{
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SECOND_SERIAL_UART->UART_IDR = UART_IDR_RXRDY ;
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NVIC_DisableIRQ(UART0_IRQn) ;
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}
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extern "C" void UART0_IRQHandler()
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{
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serial2RxFifo.push(SECOND_SERIAL_UART->UART_RHR);
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}
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#else
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#define SECOND_UART_Configure(...)
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#endif
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#if defined(FRSKY)
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void serial2TelemetryInit(unsigned int /*protocol*/)
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{
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SECOND_UART_Configure(FRSKY_D_BAUDRATE, Master_frequency);
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// startPdcUsartReceive();
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}
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bool telemetrySecondPortReceive(uint8_t & data)
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{
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return serial2RxFifo.pop(data);
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}
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#endif
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