AVR HAL ported from RT-2 (serial/pal/hal tested)

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@6999 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 237 insertions, 0 deletions

diff --git a/os/hal/ports/AVR/spi_lld.h b/os/hal/ports/AVR/spi_lld.h
new file mode 100644
index 000000000..3cc3e1adc
--- /dev/null
+++ b/os/hal/ports/AVR/spi_lld.h
@@ -0,0 +1,237 @@
+/*

+    ChibiOS/RT - Copyright (C) 2006-2014 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    AVR/spi_lld.h

+ * @brief   AVR SPI subsystem low level driver header.

+ *

+ * @addtogroup SPI

+ * @{

+ */

+

+#ifndef _SPI_LLD_H_

+#define _SPI_LLD_H_

+

+#if HAL_USE_SPI || defined(__DOXYGEN__)

+

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

+/* Driver constants.                                                         */

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

+

+/** @brief SPI Mode (Polarity/Phase) */

+#define SPI_ROLE_MASTER    0

+#define SPI_ROLE_SLAVE     1

+

+/** @brief SPI Mode (Polarity/Phase) */

+#define SPI_CPOL0_CPHA0    0

+#define SPI_CPOL0_CPHA1    1

+#define SPI_CPOL1_CPHA0    2

+#define SPI_CPOL1_CPHA1    3

+

+#define SPI_MODE_0         SPI_CPOL0_CPHA0

+#define SPI_MODE_1         SPI_CPOL0_CPHA1

+#define SPI_MODE_2         SPI_CPOL1_CPHA0

+#define SPI_MODE_3         SPI_CPOL1_CPHA1

+

+/** @brief Bit order */

+#define SPI_LSB_FIRST      0

+#define SPI_MSB_FIRST      1

+

+/** @brief SPI clock rate FOSC/x */

+#define SPI_SCK_FOSC_2     0

+#define SPI_SCK_FOSC_4     1

+#define SPI_SCK_FOSC_8     2

+#define SPI_SCK_FOSC_16    3

+#define SPI_SCK_FOSC_32    4

+#define SPI_SCK_FOSC_64    5

+#define SPI_SCK_FOSC_128   6

+

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

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

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

+

+/**

+ * @name    Configuration options

+ * @{

+ */

+/**

+ * @brief   SPI driver enable switch.

+ * @details If set to @p TRUE the support for SPI1 is included.

+ */

+#if !defined(AVR_SPI_USE_SPI1) || defined(__DOXYGEN__)

+#define AVR_SPI_USE_SPI1               FALSE

+#endif

+/** @} */

+

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

+/* Derived constants and error checks.                                       */

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

+

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

+/* Driver data structures and types.                                         */

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

+

+/**

+ * @brief   Type of a structure representing an SPI driver.

+ */

+typedef struct SPIDriver SPIDriver;

+

+/**

+ * @brief   SPI notification callback type.

+ *

+ * @param[in] spip      pointer to the @p SPIDriver object triggering the

+ *                      callback

+ */

+typedef void (*spicallback_t)(SPIDriver *spip);

+

+/**

+ * @brief   Driver configuration structure.

+ * @note    Implementations may extend this structure to contain more,

+ *          architecture dependent, fields.

+ */

+typedef struct {

+  /**

+   * @brief Role: Master or Slave

+   */

+  uint8_t               role;

+  /**

+   * @brief Port used of Slave Select

+   */

+  ioportid_t            ssport;

+  /**

+   * @brief Pad used of Slave Select

+   */

+  uint8_t               sspad;

+  /**

+   * @brief Polarity/Phase mode

+   */

+  uint8_t               mode;

+  /**

+   * @brief Use MSB/LSB first?

+   */

+  uint8_t               bitorder;

+  /**

+   * @brief Clock rate of the subsystem

+   */

+  uint8_t               clockrate;

+  /**

+   * @brief Operation complete callback.

+   */

+  spicallback_t         end_cb;

+  /* End of the mandatory fields.*/

+} SPIConfig;

+

+/**

+ * @brief   Structure representing an SPI driver.

+ * @note    Implementations may extend this structure to contain more,

+ *          architecture dependent, fields.

+ */

+struct SPIDriver {

+  /**

+   * @brief Driver state.

+   */

+  spistate_t            state;

+  /**

+   * @brief Current configuration data.

+   */

+  SPIConfig             *config;

+#if SPI_USE_WAIT || defined(__DOXYGEN__)

+  /**

+   * @brief Waiting thread.

+   */

+  Thread                *thread;

+#endif /* SPI_USE_WAIT */

+#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)

+#if CH_USE_MUTEXES || defined(__DOXYGEN__)

+  /**

+   * @brief Mutex protecting the bus.

+   */

+  Mutex                 mutex;

+#elif CH_USE_SEMAPHORES

+  Semaphore             semaphore;

+#endif

+#endif /* SPI_USE_MUTUAL_EXCLUSION */

+#if defined(SPI_DRIVER_EXT_FIELDS)

+  SPI_DRIVER_EXT_FIELDS

+#endif

+  /**

+   * @brief   Pointer to the buffer with data to send.

+   */

+  uint8_t                   *txbuf;

+  /**

+   * @brief   Number of bytes of data to send.

+   */

+  size_t                    txbytes;

+  /**

+   * @brief   Current index in buffer when sending data.

+   */

+  size_t                    txidx;

+  /**

+   * @brief   Pointer to the buffer to put received data.

+   */

+  uint8_t                   *rxbuf;

+  /**

+   * @brief   Number of bytes of data to receive.

+   */

+  size_t                    rxbytes;

+  /**

+   * @brief   Current index in buffer when receiving data.

+   */

+  size_t                    rxidx;

+};

+

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

+/* Driver macros.                                                            */

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

+

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

+/* External declarations.                                                    */

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

+

+#if AVR_SPI_USE_SPI1 && !defined(__DOXYGEN__)

+extern SPIDriver SPID1;

+#endif

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+  void spi_lld_init(void);

+  void spi_lld_start(SPIDriver *spip);

+  void spi_lld_stop(SPIDriver *spip);

+  void spi_lld_select(SPIDriver *spip);

+  void spi_lld_unselect(SPIDriver *spip);

+  void spi_lld_ignore(SPIDriver *spip, size_t n);

+  void spi_lld_exchange(SPIDriver *spip, size_t n,

+                        const void *txbuf, void *rxbuf);

+  void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);

+  void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);

+

+#if AVR_SPI_USE_16BIT_POLLED_EXCHANGE

+  uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);

+#else

+  uint8_t spi_lld_polled_exchange(SPIDriver *spip, uint8_t frame);

+#endif

+

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* HAL_USE_SPI */

+

+#endif /* _SPI_LLD_H_ */

+

+/** @} */