git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1351 35acf78f-673a-0410-8e92-d51de3d6d3f4

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diff --git a/os/hal/src/pal.c b/os/hal/src/pal.c
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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/>.

+*/

+

+/**

+ * @file pal.c

+ * @brief I/O Ports Abstraction Layer code

+ * @addtogroup PAL

+ * @{

+ */

+

+#include "ch.h"

+#include "hal.h"

+

+#if CH_HAL_USE_PAL

+

+/**

+ * @brief Read from an I/O bus.

+ *

+ * @param[in] bus the I/O bus, pointer to a @p IOBus structure

+ * @return The bus logical states.

+ *

+ * @note The operation is not guaranteed to be atomic on all the architectures,

+ *       for atomicity and/or portability reasons you may need to enclose port

+ *       I/O operations between @p chSysLock() and @p chSysUnlock().

+ * @note The function internally uses the @p palReadGroup() macro. The use of

+ *       this function is preferred when you value code size, readability  and

+ *       error checking over speed.

+ */

+ioportmask_t palReadBus(IOBus *bus) {

+

+  chDbgCheck((bus != NULL) &&

+             (bus->bus_offset > PAL_IOPORTS_WIDTH), "palReadBus");

+

+  return palReadGroup(bus->bus_portid, bus->bus_mask, bus->bus_offset);

+}

+

+/**

+ * @brief Write to an I/O bus.

+ *

+ * @param[in] bus the I/O bus, pointer to a @p IOBus structure

+ * @param[in] bits the bits to be written on the I/O bus. Values exceeding

+ *            the bus width are masked so most significant bits are lost.

+ *

+ * @note The operation is not guaranteed to be atomic on all the architectures,

+ *       for atomicity and/or portability reasons you may need to enclose port

+ *       I/O operations between @p chSysLock() and @p chSysUnlock().

+ * @note The default implementation is non atomic and not necessarily

+ *       optimal. Low level drivers may  optimize the function by using

+ *       specific hardware or coding.

+ */

+void palWriteBus(IOBus *bus, ioportmask_t bits) {

+

+  chDbgCheck((bus != NULL) &&

+             (bus->bus_offset > PAL_IOPORTS_WIDTH), "palWriteBus");

+

+  palWriteGroup(bus->bus_portid, bus->bus_mask, bus->bus_offset, bits);

+}

+

+/**

+ * @brief Programs a bus with the specified mode.

+ *
+ * @param[in] bus the I/O bus, pointer to a @p IOBus structure

+ * @param[in] mode the mode

+ *

+ * @note The operation is not guaranteed to be atomic on all the architectures,

+ *       for atomicity and/or portability reasons you may need to enclose port

+ *       I/O operations between @p chSysLock() and @p chSysUnlock().

+ * @note The default implementation is non atomic and not necessarily

+ *       optimal. Low level drivers may  optimize the function by using

+ *       specific hardware or coding.

+ */

+void palSetBusMode(IOBus *bus, uint_fast8_t mode) {

+

+  chDbgCheck((bus != NULL) &&

+             (bus->bus_offset > PAL_IOPORTS_WIDTH), "palSetBusMode");

+

+  palSetGroupMode(bus->bus_portid, bus->bus_mask, mode);

+}

+

+#endif /* CH_HAL_USE_PAL */

+

+/** @} */