169 lines
3.7 KiB
C
169 lines
3.7 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <ch.h>
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#include "avr_serial.h"
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static void SetError(uint8_t sra, FullDuplexDriver *com) {
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dflags_t sts = 0;
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if (sra & (1 << DOR))
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sts |= SD_OVERRUN_ERROR;
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if (sra & (1 << UPE))
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sts |= SD_PARITY_ERROR;
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if (sra & (1 << FE))
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sts |= SD_FRAMING_ERROR;
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chSysLockFromIsr();
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chFDDAddFlagsI(com, sts);
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chSysUnlockFromIsr();
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}
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#ifdef USE_AVR_USART0
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FullDuplexDriver SER1;
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static uint8_t ib1[SERIAL_BUFFERS_SIZE];
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static uint8_t ob1[SERIAL_BUFFERS_SIZE];
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CH_IRQ_HANDLER(USART0_RX_vect) {
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uint8_t sra;
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CH_IRQ_PROLOGUE();
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sra = UCSR0A;
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if (sra & ((1 << DOR) | (1 << UPE) | (1 << FE)))
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SetError(sra, &SER1);
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chSysLockFromIsr();
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chFDDIncomingDataI(&SER1, UDR0);
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chSysUnlockFromIsr();
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CH_IRQ_EPILOGUE();
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}
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CH_IRQ_HANDLER(USART0_UDRE_vect) {
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msg_t b;
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CH_IRQ_PROLOGUE();
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chSysLockFromIsr();
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b = chFDDRequestDataI(&SER1);
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chSysUnlockFromIsr();
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if (b < Q_OK)
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UCSR0B &= ~(1 << UDRIE);
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else
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UDR0 = b;
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CH_IRQ_EPILOGUE();
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}
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/*
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* Invoked by the high driver when one or more bytes are inserted in the
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* output queue.
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*/
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static void OutNotify1(void) {
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UCSR0B |= (1 << UDRIE);
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}
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/*
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* USART setup, must be invoked with interrupts disabled.
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* NOTE: Does not reset I/O queues.
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*/
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void SetUSART0I(uint16_t brr, uint8_t csrc) {
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UBRR0L = brr;
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UBRR0H = brr >> 8;
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UCSR0A = 0;
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UCSR0B = (1 << RXEN) | (1 << TXEN) | (1 << RXCIE);
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UCSR0C = csrc;
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}
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#endif /* USE_AVR_USART0 */
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#ifdef USE_AVR_USART1
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FullDuplexDriver SER2;
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static uint8_t ib2[SERIAL_BUFFERS_SIZE];
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static uint8_t ob2[SERIAL_BUFFERS_SIZE];
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CH_IRQ_HANDLER(USART1_RX_vect) {
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uint8_t sra;
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CH_IRQ_PROLOGUE();
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sra = UCSR1A;
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if (sra & ((1 << DOR) | (1 << UPE) | (1 << FE)))
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SetError(sra, &SER2);
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chSysLockFromIsr();
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chFDDIncomingDataI(&SER2, UDR1);
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chSysUnlockFromIsr();
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CH_IRQ_EPILOGUE();
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}
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CH_IRQ_HANDLER(USART1_UDRE_vect) {
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msg_t b;
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CH_IRQ_PROLOGUE();
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chSysLockFromIsr();
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b = chFDDRequestDataI(&SER2);
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chSysUnlockFromIsr();
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if (b < Q_OK)
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UCSR1B &= ~(1 << UDRIE);
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else
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UDR1 = b;
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CH_IRQ_EPILOGUE();
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}
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/*
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* Invoked by the high driver when one or more bytes are inserted in the
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* output queue.
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*/
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static void OutNotify2(void) {
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UCSR1B |= (1 << UDRIE);
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}
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/*
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* USART setup, must be invoked with interrupts disabled.
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* NOTE: Does not reset I/O queues.
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*/
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void SetUSART1(uint16_t brr, uint8_t csrc) {
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UBRR1L = brr;
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UBRR1H = brr >> 8;
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UCSR1A = 0;
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UCSR1B = (1 << RXEN) | (1 << TXEN) | (1 << RXCIE);
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UCSR1C = csrc;
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}
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#endif /* USE_AVR_USART1 */
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void InitSerial(void) {
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#ifdef USE_AVR_USART0
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/* I/O queues setup.*/
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chFDDInit(&SER1, ib1, sizeof ib1, NULL, ob1, sizeof ob1, OutNotify1);
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SetUSART0(UBRR(38400), (1 << UCSZ1) | (1 << UCSZ0));
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#endif
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#ifdef USE_AVR_USART1
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chFDDInit(&SER2, ib2, sizeof ib2, NULL, ob2, sizeof ob2, OutNotify2);
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SetUSART1(UBRR(38400), (1 << UCSZ1) | (1 << UCSZ0));
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#endif
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}
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