114 lines
2.9 KiB
C
114 lines
2.9 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 <signal.h>
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#include "board.h"
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#include "msp430_serial.h"
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static void SetError(uint8_t urctl, FullDuplexDriver *com) {
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dflags_t sts = 0;
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if (urctl & OE)
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sts |= SD_OVERRUN_ERROR;
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if (urctl & PE)
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sts |= SD_PARITY_ERROR;
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if (urctl & FE)
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sts |= SD_FRAMING_ERROR;
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if (urctl & BRK)
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sts |= SD_BREAK_DETECTED;
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chFDDAddFlagsI(com, sts);
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}
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#ifdef USE_MSP430_USART0
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FullDuplexDriver COM1;
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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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interrupt(USART0TX_VECTOR) u0txirq(void) {
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msg_t b;
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chSysIRQEnterI();
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b = chFDDRequestDataI(&COM1);
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if (b < Q_OK)
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U0IE &= ~UTXIE0;
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else
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U0TXBUF = b;
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chSysIRQExitI();
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}
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interrupt(USART0RX_VECTOR) u0rxirq(void) {
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uint8_t urctl;
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chSysIRQEnterI();
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if ((urctl = U0RCTL) & RXERR)
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SetError(urctl, &COM1);
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chFDDIncomingDataI(&COM1, U0RXBUF);
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chSysIRQExitI();
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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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U0IE |= UTXIE0;
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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 div, uint8_t mod, uint8_t ctl) {
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U0CTL = SWRST; /* Resets the USART, it should already be */
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/* USART init */
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U0TCTL = SSEL0 | SSEL1; /* SMCLK as clock source */
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U0MCTL = mod; /* Modulator */
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U0BR1 = (uint8_t)(div >> 8); /* Divider high */
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U0BR0 = (uint8_t)(div >> 0); /* Divider low */
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/* Clear USART status */
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(void)U0RXBUF;
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U0RCTL = 0;
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/* USART enable */
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P3SEL |= BV(4) + BV(5); /* I/O pins for USART */
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U0ME |= UTXE0 + URXE0; /* Enables the USART */
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U0CTL = ctl & ~SWRST; /* Various settings, clears reset state */
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U0IE |= URXIE0; /* Enables RX interrupt */
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}
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#endif /* USE_MSP430_USART0 */
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void InitSerial(void) {
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/* I/O queues setup.*/
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#ifdef USE_MSP430_USART0
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chFDDInit(&COM1, ib1, sizeof ib1, NULL, ob1, sizeof ob1, OutNotify1);
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SetUSART0I(UBR(38400), 0, CHAR);
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#endif
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#ifdef USE_MSP430_USART1
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#endif
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}
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