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Diffstat (limited to 'ports/ARM7-LPC214x/ioports_lld.h')
| -rw-r--r-- | ports/ARM7-LPC214x/ioports_lld.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/ports/ARM7-LPC214x/ioports_lld.h b/ports/ARM7-LPC214x/ioports_lld.h new file mode 100644 index 000000000..db82b8f97 --- /dev/null +++ b/ports/ARM7-LPC214x/ioports_lld.h @@ -0,0 +1,174 @@ +/*
+ 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/ARM-LPC214x/ioports_lld.h
+ * @brief LPC214x FIO low level driver
+ * @addtogroup LPC214X_IOPORTS
+ * @{
+ */
+
+#ifndef _IOPORTS_LLD_H_
+#define _IOPORTS_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 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 ioport_init_lld() { \
+ SCS = 3; \
+}
+
+/**
+ * @brief Writes a bits mask on a I/O port.
+ *
+ * @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 ioport_write_lld(port, bits) ((port)->FIO_PIN = (bits))
+
+/**
+ * @brief Reads an I/O port.
+ *
+ * @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 ioport_read_lld(port) ((port)->FIO_PIN)
+
+/**
+ * @brief Sets a bits mask on a I/O port.
+ *
+ * @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 ioport_set_lld(port, bits) ((port)->FIO_SET = (bits))
+
+/**
+ * @brief Clears a bits mask on a I/O port.
+ *
+ * @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 ioport_clear_lld(port, bits) ((port)->FIO_CLR = (bits))
+
+/**
+ * @brief Toggles a bits mask on a I/O port.
+ *
+ * @param[in] port the port identifier
+ * @param[in] bits the bits to be XORed on the specified port
+ *
+ * @note This function is not meant to be invoked directly by the application
+ * code.
+ */
+#define ioport_toggle_lld(port, bits) ((port)->FIO_PIN ^= (bits))
+
+/**
+ * @brief Writes a value on 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 This function is not meant to be invoked directly by the application
+ * code.
+ */
+#define ioport_writebus_lld(bus, bits) { \
+ (port)->FIO_MASK = (bus)->bus_mask; \
+ (port)->FIO_PIN = (bits) << (bus)->bus_offset; \
+ (port)->FIO_MASK = 0; \
+}
+
+/**
+ * @brief Reads a value from an I/O bus.
+ *
+ * @param[in] bus the I/O bus, pointer to a @p IOBus structure
+ * @return the bus bits
+ *
+ * @note This function is not meant to be invoked directly by the application
+ * code.
+ */
+#define ioport_readbus_lld(bus) \
+ (((bus)->bus_portid->FIO_PIN & (bus)->bus_mask) >> (bus)->bus_offset)
+
+/**
+ * @brief FIO port setup.
+ * @details This function initializes a FIO port, note that this functionality
+ * is LPC214x specific and non portable.
+ */
+#define ioport_lpc214x_set_direction_lld(port, dir) { \
+ (port)->FIO_DIR = (dir); \
+}
+
+#endif /* _IOPORTS_LLD_H_ */
+
+/** @} */
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