git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1024 35acf78f-673a-0410-8e92-d51de3d6d3f4

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diff --git a/ports/ARM7-LPC214x/pal_lld.h b/ports/ARM7-LPC214x/pal_lld.h
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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 ports/ARM7-LPC214x/ioports_lld.h

+ * @brief LPC214x FIO low level driver

+ * @addtogroup LPC214x_PAL

+ * @{

+ */

+

+#ifndef _PAL_LLD_H_

+#define _PAL_LLD_H_

+

+#ifndef _LPC214X_H_

+#include "lpc214x.h"

+#endif

+

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

+/* I/O Ports Types and constants.                                            */

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

+

+/**

+ * @brief Width, in bits, of an I/O port.
+ */

+#define PAL_IOPORTS_WIDTH 32

+

+/**

+ * @brief Digital I/O port sized unsigned type.
+ */

+typedef uint32_t ioportmask_t;

+

+/**

+ * @brief Port Identifier.

+ */

+typedef FIO * ioportid_t;

+

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

+/* I/O Ports Identifiers.                                                    */

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

+

+/**

+ * @brief FIO port 0 identifier.

+ */

+#define IOPORT_A        FIO0Base

+

+/**

+ * @brief FIO port 1 identifier.

+ */

+#define IOPORT_B        FIO1Base

+

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

+/* Implementation, some of the following macros could be implemented as      */

+/* functions, please put them in a file named ioports_lld.c if so.           */

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

+

+/**

+ * @brief FIO subsystem initialization.

+ * @details Enables the access through the fast registers.

+ */

+#define pal_lld_init() {                                                \

+  SCS = 3;                                                              \

+}

+

+/**

+ * @brief Reads an I/O port.

+ * @details This function is implemented by reading the FIO PIN register, the

+ *          implementation has no side effects.

+ *

+ * @param[in] port the port identifier

+ * @return the port bits

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_readport(port) ((port)->FIO_PIN)

+

+/**

+ * @brief Reads the output latch.

+ * @details This function is implemented by reading the FIO SET register, the

+ *          implementation has no side effects.

+ *

+ * @param[in] port the port identifier

+ * @return The latched logical states.

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_readlatch(port) ((port)->FIO_SET)

+

+/**

+ * @brief Writes a bits mask on a I/O port.

+ * @details This function is implemented by writing the FIO PIN register, the

+ *          implementation has no side effects.

+ *

+ * @param[in] port the port identifier

+ * @param[in] bits the bits to be written on the specified port

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_writeport(port, bits) ((port)->FIO_PIN = (bits))

+

+/**

+ * @brief Sets a bits mask on a I/O port.

+ * @details This function is implemented by writing the FIO SET register, the

+ *          implementation has no side effects.

+ *

+ * @param[in] port the port identifier

+ * @param[in] bits the bits to be ORed on the specified port

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_setport(port, bits) ((port)->FIO_SET = (bits))

+

+/**

+ * @brief Clears a bits mask on a I/O port.

+ * @details This function is implemented by writing the FIO CLR register, the

+ *          implementation has no side effects.

+ *

+ * @param[in] port the port identifier

+ * @param[in] bits the bits to be cleared on the specified port

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_clearport(port, bits) ((port)->FIO_CLR = (bits))

+

+/**

+ * @brief Writes a value on an I/O bus.

+ * @details This function is implemented by writing the FIO PIN and MASK

+ *          registers, the implementation is not atomic because the multiple

+ *          accesses.

+ *

+ * @param[in] port the port identifier

+ * @param[in] mask the group mask

+ * @param[in] offset the group bit offset within the port

+ * @param[in] bits the bits to be written. Values exceeding the group width

+ *            are masked.

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_writegroup(port, mask, offset, bits) {                  \

+  (port)->FIO_MASK = (mask) << (offset);                                \

+  (port)->FIO_PIN = (bits) << (offset);                                 \

+  (port)->FIO_MASK = 0;                                                 \

+}

+

+/**

+ * @brief Writes a logical state on an output pad.

+ *

+ * @param[in] port the port identifier

+ * @param[in] pad the pad number within the port

+ * @param[out] bit the logical value, the value must be @p 0 or @p 1

+ *

+ * @note This function is not meant to be invoked directly by the application

+ *       code.

+ */

+#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit)

+

+/**

+ * @brief FIO port setup.

+ * @details This function initializes a FIO port, note that this functionality

+ *          is LPC214x specific and non portable.

+ */

+#define pal_lld_lpc214x_set_direction(port, dir) {                      \

+  (port)->FIO_DIR = (dir);                                              \

+}

+

+#endif /* _PAL_LLD_H_ */

+

+/** @} */