mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2025-12-11 01:02:38 +00:00
ChibiOS 2.6.8, until I can figure out where to get it from git.
This commit is contained in:
Jared Boone
328
firmware/chibios/os/hal/platforms/MSP430/serial_lld.c
Executable file
328
firmware/chibios/os/hal/platforms/MSP430/serial_lld.c
Executable file
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/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file MSP430/serial_lld.c
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* @brief MSP430 low level serial driver code.
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*
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* @addtogroup SERIAL
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_SERIAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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#if USE_MSP430_USART0 || defined(__DOXYGEN__)
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/** @brief USART0 serial driver identifier.*/
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SerialDriver SD1;
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#endif
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#if USE_MSP430_USART1 || defined(__DOXYGEN__)
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/** @brief USART1 serial driver identifier.*/
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SerialDriver SD2;
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#endif
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/** @brief Driver default configuration.*/
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static const SerialConfig default_config = {
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UBR(SERIAL_DEFAULT_BITRATE),
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0,
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CHAR
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};
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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static void set_error(SerialDriver *sdp, uint8_t urctl) {
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flagsmask_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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chSysLockFromIsr();
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chnAddFlagsI(sdp, sts);
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chSysUnlockFromIsr();
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}
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#if USE_MSP430_USART0 || defined(__DOXYGEN__)
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static void notify1(GenericQueue *qp) {
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(void)qp;
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if (!(U0IE & UTXIE0)) {
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msg_t b = sdRequestDataI(&SD1);
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if (b != Q_EMPTY) {
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U0IE |= UTXIE0;
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U0TXBUF = (uint8_t)b;
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}
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}
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}
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/**
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* @brief USART0 initialization.
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*
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* @param[in] config the architecture-dependent serial driver configuration
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*/
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static void usart0_init(const SerialConfig *config) {
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U0CTL = SWRST; /* Resets the USART. */
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/* USART init */
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U0TCTL = SSEL0 | SSEL1; /* SMCLK as clock source. */
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U0MCTL = config->sc_mod; /* Modulator. */
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U0BR1 = (uint8_t)(config->sc_div >> 8); /* Divider high. */
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U0BR0 = (uint8_t)(config->sc_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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U0ME |= UTXE0 + URXE0; /* Enables the USART. */
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U0CTL = config->sc_ctl & ~SWRST; /* Various settings. */
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U0IE |= URXIE0; /* Enables RX interrupt. */
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}
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/**
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* @brief USART0 de-initialization.
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*/
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static void usart0_deinit(void) {
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U0IE &= ~URXIE0;
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U0CTL = SWRST;
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}
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#endif /* USE_MSP430_USART0 */
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#if USE_MSP430_USART1 || defined(__DOXYGEN__)
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static void notify2(GenericQueue *qp) {
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(void)qp;
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if (!(U1IE & UTXIE1)) {
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msg_t b = sdRequestDataI(&SD2);
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if (b != Q_EMPTY) {
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U1IE |= UTXIE1;
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U1TXBUF = (uint8_t)b;
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}
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}
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}
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/**
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* @brief USART1 initialization.
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*
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* @param[in] config the architecture-dependent serial driver configuration
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*/
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static void usart1_init(const SerialConfig *config) {
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U1CTL = SWRST; /* Resets the USART. */
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/* USART init.*/
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U1TCTL = SSEL0 | SSEL1; /* SMCLK as clock source. */
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U1MCTL = config->sc_mod; /* Modulator. */
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U1BR1 = (uint8_t)(config->sc_div >> 8); /* Divider high. */
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U1BR0 = (uint8_t)(config->sc_div >> 0); /* Divider low. */
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/* Clear USART status.*/
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(void)U0RXBUF;
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U1RCTL = 0;
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/* USART enable.*/
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U1ME |= UTXE0 + URXE0; /* Enables the USART. */
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U1CTL = config->sc_ctl & ~SWRST; /* Various settings. */
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U1IE |= URXIE0; /* Enables RX interrupt. */
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}
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/**
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* @brief USART1 de-initialization.
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*/
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static void usart1_deinit(void) {
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U1IE &= ~URXIE0;
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U1CTL = SWRST;
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}
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#endif /* USE_MSP430_USART1 */
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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#if USE_MSP430_USART0 || defined(__DOXYGEN__)
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/**
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* @brief USART0 TX interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART0TX) {
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msg_t b;
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CH_IRQ_PROLOGUE();
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chSysLockFromIsr();
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b = sdRequestDataI(&SD1);
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chSysUnlockFromIsr();
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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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CH_IRQ_EPILOGUE();
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}
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/**
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* @brief USART0 RX interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART0RX) {
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uint8_t urctl;
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CH_IRQ_PROLOGUE();
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if ((urctl = U0RCTL) & RXERR)
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set_error(&SD1, urctl);
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chSysLockFromIsr();
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sdIncomingDataI(&SD1, U0RXBUF);
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chSysUnlockFromIsr();
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CH_IRQ_EPILOGUE();
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}
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#endif /* USE_MSP430_USART0 */
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#if USE_MSP430_USART1 || defined(__DOXYGEN__)
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/**
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* @brief USART1 TX interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART1TX_VECTOR) {
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msg_t b;
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CH_IRQ_PROLOGUE();
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chSysLockFromIsr();
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b = sdRequestDataI(&SD2);
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chSysUnlockFromIsr();
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if (b < Q_OK)
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U1IE &= ~UTXIE1;
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else
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U1TXBUF = b;
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CH_IRQ_EPILOGUE();
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}
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/**
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* @brief USART1 RX interrupt handler.
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*
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* @isr
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*/
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CH_IRQ_HANDLER(USART1RX_VECTOR) {
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uint8_t urctl;
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CH_IRQ_PROLOGUE();
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if ((urctl = U1RCTL) & RXERR)
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set_error(&SD2, urctl);
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chSysLockFromIsr();
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sdIncomingDataI(&SD2, U1RXBUF);
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chSysUnlockFromIsr();
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CH_IRQ_EPILOGUE();
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}
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#endif /* USE_MSP430_USART1 */
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level serial driver initialization.
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*
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* @notapi
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*/
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void sd_lld_init(void) {
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#if USE_MSP430_USART0
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sdObjectInit(&SD1, NULL, notify1);
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#endif
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#if USE_MSP430_USART1
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sdObjectInit(&SD2, NULL, notify2);
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#endif
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}
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/**
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* @brief Low level serial driver configuration and (re)start.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration.
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* If this parameter is set to @p NULL then a default
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* configuration is used.
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*
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* @notapi
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*/
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void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
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if (config == NULL)
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config = &default_config;
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#if USE_MSP430_USART0
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if (&SD1 == sdp) {
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usart0_init(config);
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return;
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}
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#endif
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#if USE_MSP430_USART1
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if (&SD2 == sdp) {
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usart1_init(config);
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return;
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}
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#endif
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}
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/**
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* @brief Low level serial driver stop.
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* @details De-initializes the USART, stops the associated clock, resets the
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* interrupt vector.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*
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* @notapi
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*/
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void sd_lld_stop(SerialDriver *sdp) {
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#if USE_MSP430_USART0
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if (&SD1 == sdp) {
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usart0_deinit();
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return;
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}
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#endif
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#if USE_MSP430_USART1
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if (&SD2 == sdp) {
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usart1_deinit();
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return;
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}
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#endif
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}
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#endif /* HAL_USE_SERIAL */
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/** @} */
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