161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS/RT.
|
|
|
|
ChibiOS/RT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ChibiOS/RT is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <ch.h>
|
|
|
|
#include <avr/io.h>
|
|
#include <avr/interrupt.h>
|
|
|
|
#include "avr_serial.h"
|
|
|
|
static void SetError(uint8_t sra, FullDuplexDriver *com) {
|
|
dflags_t sts = 0;
|
|
|
|
if (sra & (1 << DOR))
|
|
sts |= SD_OVERRUN_ERROR;
|
|
if (sra & (1 << UPE))
|
|
sts |= SD_PARITY_ERROR;
|
|
if (sra & (1 << FE))
|
|
sts |= SD_FRAMING_ERROR;
|
|
chFDDAddFlagsI(com, sts);
|
|
}
|
|
|
|
#ifdef USE_AVR_USART0
|
|
FullDuplexDriver SER1;
|
|
static uint8_t ib1[SERIAL_BUFFERS_SIZE];
|
|
static uint8_t ob1[SERIAL_BUFFERS_SIZE];
|
|
|
|
ISR(USART0_RX_vect) {
|
|
uint8_t sra = UCSR0A;
|
|
|
|
chSysIRQEnterI();
|
|
|
|
if (sra & ((1 << DOR) | (1 << UPE) | (1 << FE)))
|
|
SetError(sra, &SER1);
|
|
chFDDIncomingDataI(&SER1, UDR0);
|
|
|
|
chSysIRQExitI();
|
|
}
|
|
|
|
ISR(USART0_UDRE_vect) {
|
|
msg_t b;
|
|
|
|
chSysIRQEnterI();
|
|
|
|
b = chFDDRequestDataI(&SER1);
|
|
if (b < Q_OK)
|
|
UCSR0B &= ~(1 << UDRIE);
|
|
else
|
|
UDR0 = b;
|
|
|
|
chSysIRQExitI();
|
|
}
|
|
|
|
/*
|
|
* Invoked by the high driver when one or more bytes are inserted in the
|
|
* output queue.
|
|
*/
|
|
static void OutNotify1(void) {
|
|
|
|
UCSR0B |= (1 << UDRIE);
|
|
}
|
|
|
|
/*
|
|
* USART setup, must be invoked with interrupts disabled.
|
|
* NOTE: Does not reset I/O queues.
|
|
*/
|
|
void SetUSART0I(uint16_t brr, uint8_t csrc) {
|
|
|
|
UBRR0L = brr;
|
|
UBRR0H = brr >> 8;
|
|
UCSR0A = 0;
|
|
UCSR0B = (1 << RXEN) | (1 << TXEN) | (1 << RXCIE);
|
|
UCSR0C = csrc;
|
|
}
|
|
#endif /* USE_AVR_USART0 */
|
|
|
|
#ifdef USE_AVR_USART1
|
|
FullDuplexDriver SER2;
|
|
static uint8_t ib2[SERIAL_BUFFERS_SIZE];
|
|
static uint8_t ob2[SERIAL_BUFFERS_SIZE];
|
|
|
|
ISR(USART1_RX_vect) {
|
|
|
|
uint8_t sra = UCSR1A;
|
|
|
|
chSysIRQEnterI();
|
|
|
|
if (sra & ((1 << DOR) | (1 << UPE) | (1 << FE)))
|
|
SetError(sra, &SER2);
|
|
chFDDIncomingDataI(&SER2, UDR1);
|
|
|
|
chSysIRQExitI();
|
|
}
|
|
|
|
ISR(USART1_UDRE_vect) {
|
|
msg_t b;
|
|
|
|
chSysIRQEnterI();
|
|
|
|
b = chFDDRequestDataI(&SER2);
|
|
if (b < Q_OK)
|
|
UCSR1B &= ~(1 << UDRIE);
|
|
else
|
|
UDR1 = b;
|
|
|
|
chSysIRQExitI();
|
|
}
|
|
|
|
/*
|
|
* Invoked by the high driver when one or more bytes are inserted in the
|
|
* output queue.
|
|
*/
|
|
static void OutNotify2(void) {
|
|
|
|
UCSR1B |= (1 << UDRIE);
|
|
}
|
|
|
|
/*
|
|
* USART setup, must be invoked with interrupts disabled.
|
|
* NOTE: Does not reset I/O queues.
|
|
*/
|
|
void SetUSART1I(uint16_t brr, uint8_t csrc) {
|
|
|
|
UBRR1L = brr;
|
|
UBRR1H = brr >> 8;
|
|
UCSR1A = 0;
|
|
UCSR1B = (1 << RXEN) | (1 << TXEN) | (1 << RXCIE);
|
|
UCSR1C = csrc;
|
|
}
|
|
#endif /* USE_AVR_USART1 */
|
|
|
|
void InitSerial(void) {
|
|
|
|
#ifdef USE_AVR_USART0
|
|
/* I/O queues setup.*/
|
|
chFDDInit(&SER1, ib1, sizeof ib1, NULL, ob1, sizeof ob1, OutNotify1);
|
|
SetUSART0I(UBRR(38400), (1 << UCSZ1) | (1 << UCSZ0));
|
|
#endif
|
|
|
|
#ifdef USE_AVR_USART1
|
|
chFDDInit(&SER2, ib2, sizeof ib2, NULL, ob2, sizeof ob2, OutNotify2);
|
|
SetUSART1I(UBRR(38400), (1 << UCSZ1) | (1 << UCSZ0));
|
|
#endif
|
|
}
|