Add low level driver directory and platfor for AVR MEGA.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10431 35acf78f-673a-0410-8e92-d51de3d6d3f4

3 files changed, 521 insertions, 0 deletions

diff --git a/os/hal/ports/AVR/MEGA/LLD/EXTv1/driver.mk b/os/hal/ports/AVR/MEGA/LLD/EXTv1/driver.mk
new file mode 100644
index 000000000..cc4993983
--- /dev/null
+++ b/os/hal/ports/AVR/MEGA/LLD/EXTv1/driver.mk
@@ -0,0 +1,9 @@
+ifeq ($(USE_SMART_BUILD),yes)

+ifneq ($(findstring HAL_USE_EXT TRUE,$(HALCONF)),)

+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/EXTv1/hal_ext_lld.c

+endif

+else

+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/EXTv1/hal_ext_lld.c

+endif

+

+PLATFORMINC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/EXTv1

diff --git a/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.c b/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.c
new file mode 100644
index 000000000..72a236ced
--- /dev/null
+++ b/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.c
@@ -0,0 +1,377 @@
+/*

+  ChibiOS - Copyright (C) 2016 Theodore Ateba

+

+  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  AVR/hal_ext_lld.c

+ * @brief AVR EXT subsystem low level driver source.

+ *

+ * @addtogroup EXT

+ * @{

+ */

+

+#include "hal.h"

+

+#if HAL_USE_EXT || defined(__DOXYGEN__)

+

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

+/* Driver local definitions.                                                 */

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

+

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

+/* Driver exported variables.                                                */

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

+

+/**

+ * @brief EXTD1 driver identifier.

+ */

+EXTDriver EXTD1;

+

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

+/* Driver local variables and types.                                         */

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

+

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

+/* Driver local functions.                                                   */

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

+

+/**

+ * @brief   Set the INTx interrupt trigger front or state.

+ *

+ * @param[in] channel   the channel to configure

+ * @param[in] edge      the front or state to configure

+ */

+void ext_lld_set_intx_edges(expchannel_t channel, uint8_t edge) {

+

+#if AVR_EXT_USE_INT0 || defined(__DOXYGEN__)

+  if (channel == INT0) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRA |= (1 << 0);

+      EICRA |= (1 << 1);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRA &= ~(1 << 0);

+      EICRA |= (1 << 1);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRA |= (1 << 0);

+      EICRA &= ~(1 << 1);

+    } else {

+      EICRA &= ~(1 << 0);

+      EICRA &= ~(1 << 1);

+    }

+  }

+#endif

+#if AVR_EXT_USE_INT1 || defined(__DOXYGEN__)

+  if (channel == INT1) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRA |= (1 << 2);

+      EICRA |= (1 << 3);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRA &= ~(1 << 2);

+      EICRA |= (1 << 3);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRA |= (1 << 2);

+      EICRA &= ~(1 << 3);

+    } else {

+      EICRA &= ~(1 << 2);

+      EICRA &= ~(1 << 3);

+    }

+  }

+#endif

+#if AVR_EXT_USE_INT2 || defined(__DOXYGEN__)

+  if (channel == INT2) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRA |= (1 << 4);

+      EICRA |= (1 << 5);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRA &= ~(1 << 4);

+      EICRA |= (1 << 5);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRA |= (1 << 4);

+      EICRA &= ~(1 << 5);

+    } else {

+      EICRA &= ~(1 << 4);

+      EICRA &= ~(1 << 5);

+    }

+  }

+#endif

+#if AVR_EXT_USE_INT3 || defined(__DOXYGEN__)

+  if (channel == INT3) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRA |= (1 << 6);

+      EICRA |= (1 << 7);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRA &= ~(1 << 6);

+      EICRA |= (1 << 7);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRA |= (1 << 6);

+      EICRA &= ~(1 << 7);

+    } else {

+      EICRA &= ~(1 << 6);

+      EICRA &= ~(1 << 7);

+    }

+  }

+#endif

+#if AVR_EXT_USE_INT4 || defined(__DOXYGEN__)

+  if (channel == INT4) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRB |= (1 << 0);

+      EICRB |= (1 << 1);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRB &= ~(1 << 0);

+      EICRB |= (1 << 1);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRB |= (1 << 0);

+      EICRB &= ~(1 << 1);

+    } else {

+      EICRB &= ~(1 << 0);

+      EICRB &= ~(1 << 1);

+    }

+  }

+#endif

+#if AVR_EXT_USE_INT5 || defined(__DOXYGEN__)

+  if (channel == INT5) {

+    if (edge == EXT_CH_MODE_RISING_EDGE) {

+      EICRB |= (1 << 2);

+      EICRB |= (1 << 3);

+    } else if (edge == EXT_CH_MODE_FALLING_EDGE) {

+      EICRB &= ~(1 << 2);

+      EICRB |= (1 << 3);

+    } else if (edge == EXT_CH_MODE_BOTH_EDGES) {

+      EICRB |= (1 << 2);

+      EICRB &= ~(1 << 3);

+    } else {

+      EICRB &= ~(1 << 2);

+      EICRB &= ~(1 << 3);

+    }

+  }

+#endif

+}

+

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

+/* Driver interrupt handlers.                                                */

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

+

+#if AVR_EXT_USE_INT0 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT0] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT0_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT0].cb(&EXTD1, INT0);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+#if AVR_EXT_USE_INT1 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT1] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT1_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT1].cb(&EXTD1, INT1);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+#if AVR_EXT_USE_INT2 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT2] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT2_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT2].cb(&EXTD1, INT2);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+#if AVR_EXT_USE_INT3 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT3] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT3_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT3].cb(&EXTD1, INT3);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+#if AVR_EXT_USE_INT4 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT4] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT4_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT4].cb(&EXTD1, INT4);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+#if AVR_EXT_USE_INT5 || defined(__DOXYGEN__)

+/**

+ * @brief EXTI[INT5] interrupt handler.

+ *

+ * @isr

+ */

+OSAL_IRQ_HANDLER(INT5_vect) {

+  OSAL_IRQ_PROLOGUE();

+  EXTD1.config->channels[INT5].cb(&EXTD1, INT5);

+  OSAL_IRQ_EPILOGUE();

+}

+#endif

+

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

+/* Driver functions.                                                         */

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

+

+/**

+ * @brief   Enables an EXT channel.

+ *

+ * @param[in] extp      pointer to the @p EXTDriver object

+ * @param[in] channel   channel to be enabled

+ *

+ * @notapi

+ */

+void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) {

+

+#if AVR_EXT_USE_INT0 || defined(__DOXYGEN__)

+  if (channel == INT0) {

+    EIMSK |= 1 << INT0;

+    ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+#if AVR_EXT_USE_INT1 || defined(__DOXYGEN__)

+  if (channel == INT1) {

+    EIMSK |= 1 << INT1;

+    ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+#if AVR_EXT_USE_INT2 || defined(__DOXYGEN__)

+  if (channel == INT2) {

+    EIMSK |= 1 << INT2;

+  ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+#if AVR_EXT_USE_INT3 || defined(__DOXYGEN__)

+  if (channel == INT3) {

+    EIMSK |= 1 << INT3;

+    ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+#if AVR_EXT_USE_INT4 || defined(__DOXYGEN__)

+  if (channel == INT4) {

+    EIMSK |= 1 << INT4;

+    ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+#if AVR_EXT_USE_INT5 || defined(__DOXYGEN__)

+  if (channel == INT5) {

+    EIMSK |= 1 << INT5;

+    ext_lld_set_intx_edges(channel, extp->config->channels[channel].mode);

+  }

+#endif

+}

+

+/**

+ * @brief   Disables an EXT channel.

+ *

+ * @param[in] extp      pinter to the @p EXTDriver object

+ * @param[in] channel   channel to be disabled

+ *

+ * @notapi

+ */

+void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {

+

+#if AVR_EXT_USE_INT0 || defined(__DOXYGEN__)

+  if (channel == INT0)

+    EIMSK &= ~(1 << INT0);

+#endif

+#if AVR_EXT_USE_INT1 || defined(__DOXYGEN__)

+  if (channel == INT1)

+    EIMSK &= ~(1 << INT1);

+#endif

+#if AVR_EXT_USE_INT2 || defined(__DOXYGEN__)

+  if (channel == INT2)

+    EIMSK &= ~(1 << INT2);

+#endif

+#if AVR_EXT_USE_INT3 || defined(__DOXYGEN__)

+  if (channel == INT3)

+    EIMSK &= ~(1 << INT3);

+#endif

+#if AVR_EXT_USE_INT4 || defined(__DOXYGEN__)

+  if (channel == INT4)

+    EIMSK &= ~(1 << INT4);

+#endif

+#if AVR_EXT_USE_INT5 || defined(__DOXYGEN__)

+  if (channel == INT5)

+    EIMSK &= ~(1 << INT5);

+#endif

+}

+

+/**

+ * @brief   Low level EXT driver initialization.

+ *

+ * @notapi

+ */

+void ext_lld_init(void) {

+

+  /* Driver initialization.*/

+  extObjectInit(&EXTD1);

+}

+

+/**

+ * @brief   Configures and activates the EXT peripheral.

+ *

+ * @param[in] extp  pointer to the @p EXTDriver object

+ *

+ * @notapi

+ */

+void ext_lld_start(EXTDriver *extp) {

+

+  expchannel_t line;

+

+  if (extp->state == EXT_STOP)

+    osalSysUnlock();

+

+  /* Configuration of automatic channels. */

+  for (line = 0; line < EXT_MAX_CHANNELS; line++) {

+    if (extp->config->channels[line].mode & EXT_CH_MODE_AUTOSTART)

+      ext_lld_channel_enable(extp, line);

+    else

+      ext_lld_channel_disable(extp, line);

+  }

+}

+

+/**

+ * @brief   Deactivates the EXT peripheral.

+ *

+ * @param[in] extp  pointer to the @p EXTDriver object

+ *

+ * @notapi

+ */

+void ext_lld_stop(EXTDriver *extp) {

+

+  if (extp->state == EXT_ACTIVE)

+    osalSysLock();

+}

+

+#endif /* HAL_USE_EXT */

+

+/** @} */

+

diff --git a/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.h b/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.h
new file mode 100644
index 000000000..6707f9cda
--- /dev/null
+++ b/os/hal/ports/AVR/MEGA/LLD/EXTv1/hal_ext_lld.h
@@ -0,0 +1,135 @@
+/*

+  ChibiOS - Copyright (C) 2016 Theodore Ateba

+

+  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  AVR/hal_ext_lld.h

+ * @brief EXT Driver subsystem low level driver source.

+ *

+ * @addtogroup EXT

+ * @{

+ */

+

+#ifndef _HAL_EXT_LLD_H_

+#define _HAL_EXT_LLD_H_

+

+#if HAL_USE_EXT || defined(__DOXYGEN__)

+

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

+/* Driver constants.                                                         */

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

+

+/**

+ * @brief Maximum number of EXT channels.

+ */

+#define AVR_INT_NUM_LINES 6 /**< INT0 to INT5 */

+

+/**

+ * @brief Available number of EXT channels.

+ */

+#define EXT_MAX_CHANNELS  AVR_INT_NUM_LINES

+

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

+/* Driver pre-compile time settings.                                         */

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

+

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

+/* Derived constants and error checks.                                       */

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

+

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

+/* Driver data structures and types.                                         */

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

+

+/**

+ * @brief EXT channel identifier.

+ */

+typedef uint16_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.*/

+} 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.*/

+};

+

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

+/* Driver macros.                                                            */

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

+

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

+/* External declarations.                                                    */

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

+extern EXTDriver EXTD1;

+

+#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 /* _HAL_EXT_LLD_H_ */

+