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/*
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 <signal.h>
#include "board.h"
#include "msp430_serial.h"
static void SetError(uint8_t urctl, FullDuplexDriver *com) {
dflags_t sts = 0;
if (urctl & OE)
sts |= SD_OVERRUN_ERROR;
if (urctl & PE)
sts |= SD_PARITY_ERROR;
if (urctl & FE)
sts |= SD_FRAMING_ERROR;
if (urctl & BRK)
sts |= SD_BREAK_DETECTED;
chFDDAddFlagsI(com, sts);
}
#ifdef USE_MSP430_USART0
FullDuplexDriver COM1;
static uint8_t ib1[SERIAL_BUFFERS_SIZE];
static uint8_t ob1[SERIAL_BUFFERS_SIZE];
interrupt(USART0TX_VECTOR) u0txirq(void) {
msg_t b;
chSysIRQEnterI();
b = chFDDRequestDataI(&COM1);
if (b < Q_OK)
U0IE &= ~UTXIE0;
else
U0TXBUF = b;
chSysIRQExitI();
}
interrupt(USART0RX_VECTOR) u0rxirq(void) {
uint8_t urctl;
chSysIRQEnterI();
if ((urctl = U0RCTL) & RXERR)
SetError(urctl, &COM1);
chFDDIncomingDataI(&COM1, U0RXBUF);
chSysIRQExitI();
}
/*
* Invoked by the high driver when one or more bytes are inserted in the
* output queue.
*/
static void OutNotify1(void) {
U0IE |= UTXIE0;
}
/*
* USART setup, must be invoked with interrupts disabled.
* NOTE: Does not reset I/O queues.
*/
void SetUSART0I(uint16_t div, uint8_t mod, uint8_t ctl) {
U0CTL = SWRST; /* Resets the USART, it should already be */
/* USART init */
U0TCTL = SSEL0 | SSEL1; /* SMCLK as clock source */
U0MCTL = mod; /* Modulator */
U0BR1 = (uint8_t)(div >> 8); /* Divider high */
U0BR0 = (uint8_t)(div >> 0); /* Divider low */
/* Clear USART status */
(void)U0RXBUF;
U0RCTL = 0;
/* USART enable */
P3SEL |= BV(4) + BV(5); /* I/O pins for USART */
U0ME |= UTXE0 + URXE0; /* Enables the USART */
U0CTL = ctl & ~SWRST; /* Various settings, clears reset state */
U0IE |= URXIE0; /* Enables RX interrupt */
}
#endif /* USE_MSP430_USART0 */
void InitSerial(void) {
/* I/O queues setup.*/
#ifdef USE_MSP430_USART0
chFDDInit(&COM1, ib1, sizeof ib1, NULL, ob1, sizeof ob1, OutNotify1);
SetUSART0I(UBR(38400), 0, CHAR);
#endif
#ifdef USE_MSP430_USART1
#endif
}
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