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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
| commit | 7c68ef157d009f9932ac47ba21ba5d74e321623f (patch) | |
| tree | 6c2442ca44cd090656ec3059ffb959f3d747e18d /os/hal/platforms/AT91SAM7/ext_lld.h | |
| parent | 076746af63d317f8e96766b9137a65679f60463f (diff) | |
| parent | e0d850113610f3efa0c0ac4946901f683e5e7332 (diff) | |
| download | ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.gz ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.bz2 ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@5854 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/AT91SAM7/ext_lld.h')
| -rw-r--r-- | os/hal/platforms/AT91SAM7/ext_lld.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/os/hal/platforms/AT91SAM7/ext_lld.h b/os/hal/platforms/AT91SAM7/ext_lld.h new file mode 100644 index 000000000..3bc0baa99 --- /dev/null +++ b/os/hal/platforms/AT91SAM7/ext_lld.h @@ -0,0 +1,239 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file AT91SAM7/ext_lld.h
+ * @brief AT91SAM7 EXT subsystem low level driver header.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#ifndef _EXT_LLD_H_
+#define _EXT_LLD_H_
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/**
+ * @brief Pointer to the SAM7 AIC register block.
+ */
+#define SAM7_EXT_AIC ((AT91PS_AIC *)AT91C_BASE_AIC)
+
+/**
+ * @brief Number of channels within one ext driver.
+ */
+#define EXT_MAX_CHANNELS 32
+
+/**
+ * @brief Mask of priority bits in interrupt mode register.
+ */
+#define SAM7_EXT_PRIORITY_MASK 0x00000007
+
+/**
+ * @brief Shifter for priority bits in interrupt mode register.
+ */
+#define SAM7_EXT_PRIORITY_SHIFTER 0
+
+/**
+ * @brief Shifter for mode bits in interrupt mode register.
+ */
+#define SAM7_EXT_MODE_SHIFTER 5
+
+/*
+ * On the SAM7 architecture, a single channel can only be enables or disabled
+ * Hence, undefine the other channel mode constants
+ */
+#ifdef EXT_CH_MODE_RISING_EDGE
+#undef EXT_CH_MODE_RISING_EDGE
+#endif
+
+#ifdef EXT_CH_MODE_FALLING_EDGE
+#undef EXT_CH_MODE_FALLING_EDGE
+#endif
+
+#ifdef EXT_CH_MODE_BOTH_EDGES
+#undef EXT_CH_MODE_BOTH_EDGES
+#endif
+
+/**
+ * @name EXT channels mode
+ * @{
+ */
+#define EXT_CH_MODE_ENABLED 1 /**< @brief Channel is enabled. */
+/** @} */
+
+/**
+ * @name EXT drivers mode
+ * @{
+ */
+/**
+ * @brief Mask for modes.
+ */
+#define SAM7_EXT_MODE_MASK AT91C_AIC_SRCTYPE
+/**
+ * @brief Falling edge callback.
+ */
+#define SAM7_EXT_MODE_FALLING_EDGE AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE
+/**
+ * @brief Rising edge callback.
+ */
+#define SAM7_EXT_MODE_RISING_EDGE AT91C_AIC_SRCTYPE_POSITIVE_EDGE
+/**
+ * @brief High-level callback.
+ */
+#define SAM7_EXT_MODE_HIGH_LEVEL AT91C_AIC_SRCTYPE_HIGH_LEVEL
+/**
+ * @brief Low-level callback.
+ */
+#define SAM7_EXT_MODE_LOW_LEVEL AT91C_AIC_SRCTYPE_EXT_LOW_LEVEL
+/** @} */
+
+/**
+ * @name EXT drivers priorities
+ * @{
+ */
+#define SAM7_EXT_PRIOR_HIGHEST AT91C_AIC_PRIOR_HIGHEST
+#define SAM7_EXT_PRIOR_LOWEST AT91C_AIC_PRIOR_LOWEST
+/** @} */
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief EXT channel identifier.
+ */
+typedef uint32_t expchannel_t;
+
+/**
+ * @brief Type of an EXT generic notification callback.
+ *
+ * @param[in] extp pointer to the @p EXPDriver object triggering the
+ * callback
+ */
+typedef void (*extcallback_t)(EXTDriver *extp, expchannel_t channel);
+
+/**
+ * @brief Channel configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Channel mode.
+ */
+ uint32_t mode;
+ /**
+ * @brief Channel callback.
+ */
+ extcallback_t cb;
+} EXTChannelConfig;
+
+/**
+ * @brief Driver configuration structure.
+ * @note It could be empty on some architectures.
+ */
+typedef struct {
+ /**
+ * @brief Channel configurations.
+ */
+ EXTChannelConfig channels[EXT_MAX_CHANNELS];
+ /* End of the mandatory fields.*/
+ /**
+ * @brief interrupt mode.
+ */
+ uint32_t mode;
+ /**
+ * @brief interrupt priority.
+ */
+ uint32_t priority;
+} EXTConfig;
+
+/**
+ * @brief Structure representing an EXT driver.
+ */
+struct EXTDriver {
+ /**
+ * @brief Driver state.
+ */
+ extstate_t state;
+ /**
+ * @brief Current configuration data.
+ */
+ const EXTConfig *config;
+ /* End of the mandatory fields.*/
+
+ /**
+ * @brief Pointer to the corresponding PIO registers block.
+ */
+ AT91PS_PIO pio;
+ /**
+ * @brief peripheral ID of the corresponding PIO block.
+ */
+ uint32_t pid;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @brief Computes the content for the interrupt source mode register.
+ */
+#define SAM7_computeSMR(mode, prio) ( \
+ ((mode & SAM7_EXT_MODE_MASK) << SAM7_EXT_MODE_SHIFTER) | \
+ ((prio & SAM7_EXT_PRIORITY_MASK) << SAM7_EXT_PRIORITY_SHIFTER) \
+)
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+extern EXTDriver EXTDA;
+#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
+ (SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3)
+extern EXTDriver EXTDB;
+#endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void ext_lld_init(void);
+ void ext_lld_start(EXTDriver *extp);
+ void ext_lld_stop(EXTDriver *extp);
+ void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel);
+ void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_EXT */
+
+#endif /* _EXT_LLD_H_ */
+
+/** @} */
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