09943e1cb7
Added support for nozzle offsets in G10 command Disable heater timeout if the time limit is set to zero or negative Don't send non-error responses to the web interface unless the corresponding command also came from the web interface Added support for aux input from serial. Need to finish this by making serial transmission interrupt-driven.
142 lines
3.7 KiB
C++
142 lines
3.7 KiB
C++
/*
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Copyright (c) 2011 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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.
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See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "UARTClass.h"
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// Constructors ////////////////////////////////////////////////////////////////
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UARTClass::UARTClass( Uart* pUart, IRQn_Type dwIrq, uint32_t dwId, RingBuffer* pRx_buffer )
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{
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_rx_buffer = pRx_buffer ;
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_pUart=pUart ;
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_dwIrq=dwIrq ;
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_dwId=dwId ;
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}
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// Public Methods //////////////////////////////////////////////////////////////
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void UARTClass::begin( const uint32_t dwBaudRate )
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{
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// Configure PMC
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pmc_enable_periph_clk( _dwId ) ;
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// Disable PDC channel
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_pUart->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS ;
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// Reset and disable receiver and transmitter
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_pUart->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX | UART_CR_RXDIS | UART_CR_TXDIS ;
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// Configure mode
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_pUart->UART_MR = UART_MR_PAR_NO | UART_MR_CHMODE_NORMAL ;
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// Configure baudrate (asynchronous, no oversampling)
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_pUart->UART_BRGR = (SystemCoreClock / dwBaudRate) >> 4 ;
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// Configure interrupts
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_pUart->UART_IDR = 0xFFFFFFFF;
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_pUart->UART_IER = UART_IER_RXRDY | UART_IER_OVRE | UART_IER_FRAME;
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// Enable UART interrupt in NVIC
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NVIC_EnableIRQ(_dwIrq);
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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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}
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void UARTClass::end( void )
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{
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// clear any received data
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_rx_buffer->_iHead = _rx_buffer->_iTail ;
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// Disable UART interrupt in NVIC
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NVIC_DisableIRQ( _dwIrq ) ;
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// Wait for any outstanding data to be sent
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flush();
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pmc_disable_periph_clk( _dwId ) ;
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}
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int UARTClass::available( void )
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{
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return (uint32_t)(SERIAL_BUFFER_SIZE + _rx_buffer->_iHead - _rx_buffer->_iTail) % SERIAL_BUFFER_SIZE ;
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}
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int UARTClass::peek( void )
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{
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if ( _rx_buffer->_iHead == _rx_buffer->_iTail )
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return -1 ;
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return _rx_buffer->_aucBuffer[_rx_buffer->_iTail] ;
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}
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int UARTClass::read( void )
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{
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// if the head isn't ahead of the tail, we don't have any characters
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if ( _rx_buffer->_iHead == _rx_buffer->_iTail )
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return -1 ;
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uint8_t uc = _rx_buffer->_aucBuffer[_rx_buffer->_iTail] ;
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_rx_buffer->_iTail = (unsigned int)(_rx_buffer->_iTail + 1) % SERIAL_BUFFER_SIZE ;
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return uc ;
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}
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void UARTClass::flush( void )
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{
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// Wait for transmission to complete
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while ((_pUart->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY)
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;
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}
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size_t UARTClass::write( const uint8_t uc_data )
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{
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// Check if the transmitter is ready
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while ((_pUart->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY)
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;
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// Send character
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_pUart->UART_THR = uc_data;
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return 1;
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}
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size_t UARTClass::canWrite( void ) const //***** DC42 added
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{
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return (_pUart->UART_SR & UART_SR_TXRDY) ? 1 : 0;
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}
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void UARTClass::IrqHandler( void )
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{
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uint32_t status = _pUart->UART_SR;
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// Did we receive data ?
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if ((status & UART_SR_RXRDY) == UART_SR_RXRDY)
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_rx_buffer->store_char(_pUart->UART_RHR);
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// Acknowledge errors
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if ((status & UART_SR_OVRE) == UART_SR_OVRE ||
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(status & UART_SR_FRAME) == UART_SR_FRAME)
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{
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// TODO: error reporting outside ISR
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_pUart->UART_CR |= UART_CR_RSTSTA;
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}
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}
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