git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1102 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 292 insertions, 0 deletions

diff --git a/os/io/platforms/MSP430/serial_lld.c b/os/io/platforms/MSP430/serial_lld.c
new file mode 100644
index 000000000..c1ac3035c
--- /dev/null
+++ b/os/io/platforms/MSP430/serial_lld.c
@@ -0,0 +1,292 @@
+/*

+    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/>.

+*/

+

+/**

+ * @file templates/serial_lld.c

+ * @brief Serial Driver subsystem low level driver source template

+ * @addtogroup SERIAL_LLD

+ * @{

+ */

+

+#include <ch.h>

+#include <serial.h>

+

+#include <signal.h>

+

+#include "board.h"

+

+#if USE_MSP430_USART0 || defined(__DOXYGEN__)

+/** @brief USART0 serial driver identifier.*/

+SerialDriver COM1;

+#endif

+#if USE_MSP430_USART1 || defined(__DOXYGEN__)

+/** @brief USART1 serial driver identifier.*/

+SerialDriver COM2;

+#endif

+

+/** @brief Driver default configuration.*/

+static const SerialDriverConfig default_config = {

+  UBR(DEFAULT_USART_BITRATE),

+  0,

+  CHAR

+};

+

+/*===========================================================================*/

+/* Low Level Driver local functions.                                         */

+/*===========================================================================*/

+

+static void set_error(uint8_t urctl, SerialDriver *sdp) {

+  sdflags_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;

+  chSysLockFromIsr();

+  sdAddFlagsI(sdp, sts);

+  chSysUnlockFromIsr();

+}

+

+#if USE_MSP430_USART0 || defined(__DOXYGEN__)

+static void notify1(void) {

+

+  if (!(U0IE & UTXIE0)) {

+    chSysLockFromIsr();

+    U0TXBUF = (uint8_t)sdRequestDataI(&COM1);

+    chSysUnlockFromIsr();

+    U0IE |= UTXIE0;

+  }

+}

+

+/**

+ * @brief USART0 initialization.

+ * @param[in] config the architecture-dependent serial driver configuration

+ */

+void usart0_init(const SerialDriverConfig *config) {

+

+  U0CTL = SWRST;                /* Resets the USART, it should already be.*/

+  /* USART init */

+  U0TCTL = SSEL0 | SSEL1;       /* SMCLK as clock source.*/

+  U0MCTL = config->mod;         /* Modulator.*/

+  U0BR1 = (uint8_t)(config->div >> 8);  /* Divider high.*/

+  U0BR0 = (uint8_t)(config->div >> 0);  /* Divider low.*/

+  /* Clear USART status.*/

+  (void)U0RXBUF;

+  U0RCTL = 0;

+  /* USART enable.*/

+  U0ME |= UTXE0 + URXE0;        /* Enables the USART.*/

+  U0CTL = config->ctl & ~SWRST; /* Various settings, clears reset state.*/

+  U0IE |= URXIE0;               /* Enables RX interrupt.*/

+}

+

+/**

+ * @brief USART0 de-initialization.

+ */

+void usart0_deinit(void) {

+

+  U0IE &= ~URXIE0;

+  U0CTL = SWRST;

+}

+#endif /* USE_MSP430_USART0 */

+

+#if USE_MSP430_USART1 || defined(__DOXYGEN__)

+static void notify2(void) {

+

+  if (!(U1IE & UTXIE1)) {

+    U1TXBUF = (uint8_t)sdRequestDataI(&COM2);

+    U1IE |= UTXIE1;

+  }

+}

+

+/**

+ * @brief USART1 initialization.

+ * @param[in] config the architecture-dependent serial driver configuration

+ */

+void usart1_init(const SerialDriverConfig *config) {

+

+  U1CTL = SWRST;                /* Resets the USART, it should already be.*/

+  /* USART init.*/

+  U1TCTL = SSEL0 | SSEL1;       /* SMCLK as clock source.*/

+  U1MCTL = config->mod;         /* Modulator.*/

+  U1BR1 = (uint8_t)(config->div >> 8);  /* Divider high.*/

+  U1BR0 = (uint8_t)(config->div >> 0);  /* Divider low.*/

+  /* Clear USART status.*/

+  (void)U0RXBUF;

+  U1RCTL = 0;

+  /* USART enable.*/

+  U1ME |= UTXE0 + URXE0;        /* Enables the USART.*/

+  U1CTL = config->ctl & ~SWRST; /* Various settings, clears reset state.*/

+  U1IE |= URXIE0;               /* Enables RX interrupt.*/

+}

+

+/**

+ * @brief USART1 de-initialization.

+ */

+void usart1_deinit(void) {

+

+  U1IE &= ~URXIE0;

+  U1CTL = SWRST;

+}

+#endif /* USE_MSP430_USART1 */

+

+/*===========================================================================*/

+/* Low Level Driver interrupt handlers.                                      */

+/*===========================================================================*/

+

+#if USE_MSP430_USART0 || defined(__DOXYGEN__)

+CH_IRQ_HANDLER(USART0TX_VECTOR) {

+  msg_t b;

+

+  CH_IRQ_PROLOGUE();

+

+  chSysLockFromIsr();

+  b = sdRequestDataI(&COM1);

+  chSysUnlockFromIsr();

+  if (b < Q_OK)

+    U0IE &= ~UTXIE0;

+  else

+    U0TXBUF = b;

+

+  CH_IRQ_EPILOGUE();

+}

+

+CH_IRQ_HANDLER(USART0RX_VECTOR) {

+  uint8_t urctl;

+

+  CH_IRQ_PROLOGUE();

+

+  if ((urctl = U0RCTL) & RXERR)

+    set_error(urctl, &COM1);

+  chSysLockFromIsr();

+  sdIncomingDataI(&COM1, U0RXBUF);

+  chSysUnlockFromIsr();

+

+  CH_IRQ_EPILOGUE();

+}

+#endif /* USE_MSP430_USART0 */

+

+#if USE_MSP430_USART1 || defined(__DOXYGEN__)

+CH_IRQ_HANDLER(USART1TX_VECTOR) {

+  msg_t b;

+

+  CH_IRQ_PROLOGUE();

+

+  chSysLockFromIsr();

+  b = sdRequestDataI(&COM2);

+  chSysUnlockFromIsr();

+  if (b < Q_OK)

+    U1IE &= ~UTXIE1;

+  else

+    U1TXBUF = b;

+

+  CH_IRQ_EPILOGUE();

+}

+

+CH_IRQ_HANDLER(USART1RX_VECTOR) {

+  uint8_t urctl;

+

+  CH_IRQ_PROLOGUE();

+

+  if ((urctl = U1RCTL) & RXERR)

+    set_error(urctl, &COM2);

+  chSysLockFromIsr();

+  sdIncomingDataI(&COM2, U1RXBUF);

+  chSysUnlockFromIsr();

+

+  CH_IRQ_EPILOGUE();

+}

+#endif /* USE_MSP430_USART1 */

+

+/*===========================================================================*/

+/* Low Level Driver exported functions.                                      */

+/*===========================================================================*/

+

+/**

+ * Low level serial driver initialization.
+ */

+void sd_lld_init(void) {

+

+#if USE_MSP430_USART0

+  sdObjectInit(&COM1, NULL, notify1);

+  /* I/O pins for USART0.*/

+  P3SEL |= BV(4) + BV(5);

+#endif

+

+#if USE_MSP430_USART1

+  sdObjectInit(&COM2, NULL, notify2);

+  /* I/O pins for USART1.*/

+  P3SEL |= BV(6) + BV(7);

+#endif

+}

+

+/**

+ * @brief Low level serial driver configuration and (re)start.

+ *

+ * @param[in] sdp pointer to a @p SerialDriver object

+ * @param[in] config the architecture-dependent serial driver configuration.

+ *                   If this parameter is set to @p NULL then a default

+ *                   configuration is used.

+ */

+void sd_lld_start(SerialDriver *sdp, const SerialDriverConfig *config) {

+

+  if (config == NULL)

+    config = &default_config;

+

+#if USE_MSP430_USART0

+  if (&COM1 == sdp) {

+    usart0_init(config);

+    return;

+  }

+#endif

+#if USE_MSP430_USART1

+  if (&COM2 == sdp) {

+    usart1_init(config);

+    return;

+  }

+#endif

+}

+

+/**

+ * @brief Low level serial driver stop.

+ * @details De-initializes the USART, stops the associated clock, resets the

+ *          interrupt vector.

+ *

+ * @param[in] sdp pointer to a @p SerialDriver object

+ */

+void sd_lld_stop(SerialDriver *sdp) {

+

+#if USE_MSP430_USART0

+  if (&COM1 == sdp) {

+    usart0_deinit();

+    return;

+  }

+#endif

+#if USE_MSP430_USART1

+  if (&COM2 == sdp) {

+    usart1_deinit();

+    return;

+  }

+#endif

+}

+

+/** @} */