I/O port driver for LPC214x added.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1016 35acf78f-673a-0410-8e92-d51de3d6d3f4

4 files changed, 198 insertions, 2 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_ */

+

+/** @} */

diff --git a/ports/ARM7-LPC214x/lpc214x.h b/ports/ARM7-LPC214x/lpc214x.h
index 96dfa437b..e260da713 100644
--- a/ports/ARM7-LPC214x/lpc214x.h
+++ b/ports/ARM7-LPC214x/lpc214x.h
@@ -17,6 +17,11 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

 

+/**

+ * @file lpc214x.h

+ * @brief LPC214x register definitions

+ */

+

 #ifndef _LPC214X_H_

 #define _LPC214X_H_

 

diff --git a/ports/ARM7-LPC214x/lpc214x_ssp.c b/ports/ARM7-LPC214x/lpc214x_ssp.c
index 43c4100bc..00db41cbf 100644
--- a/ports/ARM7-LPC214x/lpc214x_ssp.c
+++ b/ports/ARM7-LPC214x/lpc214x_ssp.c
@@ -25,6 +25,7 @@
  */

 

 #include <ch.h>

+#include <ioports.h>

 

 #include "lpc214x.h"

 #include "lpc214x_ssp.h"

@@ -43,7 +44,7 @@ void sspAcquireBus(void) {
 #if LPC214x_SSP_USE_MUTEX

   chSemWait(&me);

 #endif

-  IO0CLR = 1 << 20;

+  chPortClear(IOPORT_A, (1 << 20));

 }

 

 /**

@@ -53,7 +54,7 @@ void sspAcquireBus(void) {
  */

 void sspReleaseBus(void) {

 

-  IO0SET = 1 << 20;

+  chPortSet(IOPORT_A, (1 << 20));

 #if LPC214x_SSP_USE_MUTEX

   chSemSignal(&me);

 #endif

diff --git a/ports/ARM7-LPC214x/port.dox b/ports/ARM7-LPC214x/port.dox
index ad567b2ae..35f0d128f 100644
--- a/ports/ARM7-LPC214x/port.dox
+++ b/ports/ARM7-LPC214x/port.dox
@@ -23,6 +23,7 @@
  * @brief LPC214x specific support.

  * @details The LPC214x support includes:

  * - VIC support code.

+ * - I/O ports driver.

  * - Buffered, interrupt driven, serial driver.

  * - SSP driver.

  * - A MMC/SD demo driver.

@@ -45,6 +46,21 @@
 /** @} */

 

 /**

+ * @defgroup LPC214x_IOPORTS I/O Ports Support

+ * @brief I/O Ports peripherals support.

+ * @details This module supports the LPC214x FIO controller. The controller

+ * supports the following features (see @ref IOPorts):

+ * - 32 bits wide ports.

+ * - Atomic set/reset functions.

+ * - Atomic set+reset function (atomic bus operations).

+ * - Output latched regardless of the pad setting.

+ * - Direct read of input pads regardless of the pad setting.

+ * .

+ * The only non atomic operations are bit toggling and bus writing.

+ * @ingroup LPC214x

+ */

+

+/**

  * @defgroup LPC214x_SERIAL UART Support

  * @{

  * @brief UART peripherals support.