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author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-06-07 16:11:41 +0000 |
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committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2009-06-07 16:11:41 +0000 |
commit | f9ecd9f46e829010b0457a04993d2a89a37c104a (patch) | |
tree | 2e0a1556bc6075d3976d3f121c6748859b4514f7 /ports/ARM7-LPC214x/pal_lld.h | |
parent | a5df28e309adbccff162d67cfb9f55c653c73f7b (diff) | |
download | ChibiOS-f9ecd9f46e829010b0457a04993d2a89a37c104a.tar.gz ChibiOS-f9ecd9f46e829010b0457a04993d2a89a37c104a.tar.bz2 ChibiOS-f9ecd9f46e829010b0457a04993d2a89a37c104a.zip |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1024 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'ports/ARM7-LPC214x/pal_lld.h')
-rw-r--r-- | ports/ARM7-LPC214x/pal_lld.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/ports/ARM7-LPC214x/pal_lld.h b/ports/ARM7-LPC214x/pal_lld.h new file mode 100644 index 000000000..ce56f9562 --- /dev/null +++ b/ports/ARM7-LPC214x/pal_lld.h @@ -0,0 +1,189 @@ +/*
+ 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_ */
+
+/** @} */
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