git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1351 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 210 insertions, 0 deletions

diff --git a/os/hal/platforms/STM32/spi_lld.h b/os/hal/platforms/STM32/spi_lld.h
new file mode 100644
index 000000000..e065ed2d4
--- /dev/null
+++ b/os/hal/platforms/STM32/spi_lld.h
@@ -0,0 +1,210 @@
+/*

+    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 STM32/spi_lld.h

+ * @brief STM32 SPI subsystem low level driver header

+ * @addtogroup STM32_SPI

+ * @{

+ */

+

+#ifndef _SPI_LLD_H_

+#define _SPI_LLD_H_

+

+#if CH_HAL_USE_SPI

+

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

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

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

+

+/**

+ * @brief SPI1 driver enable switch.

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

+ * @note The default is @p TRUE.

+ */

+#if !defined(USE_STM32_SPI1) || defined(__DOXYGEN__)

+#define USE_STM32_SPI1              TRUE

+#endif

+

+/**

+ * @brief SPI2 driver enable switch.

+ * @details If set to @p TRUE the support for SPI2 is included.

+ * @note The default is @p TRUE.

+ */

+#if !defined(USE_STM32_SPI2) || defined(__DOXYGEN__)

+#define USE_STM32_SPI2              TRUE

+#endif

+

+/**

+ * @brief SPI1 DMA priority (0..3|lowest..highest).

+ * @note The priority level is used for both the TX and RX DMA channels but

+ *       because of the channels ordering the RX channel has always priority

+ *       over the TX channel.
+ */

+#if !defined(SPI1_DMA_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_SPI1_DMA_PRIORITY     2

+#endif

+

+/**

+ * @brief SPI2 DMA priority (0..3|lowest..highest).

+ * @note The priority level is used for both the TX and RX DMA channels but

+ *       because of the channels ordering the RX channel has always priority

+ *       over the TX channel.

+ */

+#if !defined(SPI2_DMA_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_SPI2_DMA_PRIORITY     2

+#endif

+

+/**

+ * @brief SPI1 interrupt priority level setting.

+ * @note @p BASEPRI_KERNEL >= @p STM32_SPI1_IRQ_PRIORITY > @p PRIORITY_PENDSV.

+ */

+#if !defined(STM32_SPI1_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_SPI1_IRQ_PRIORITY     0x60

+#endif

+

+/**

+ * @brief SPI2 interrupt priority level setting.

+ * @note @p BASEPRI_KERNEL >= @p STM32_SPI2_IRQ_PRIORITY > @p PRIORITY_PENDSV.

+ */

+#if !defined(STM32_SPI2_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_SPI2_IRQ_PRIORITY     0x60

+#endif

+

+/**

+ * @brief SPI1 DMA error hook.

+ * @note The default action for DMA errors is a system halt because DMA error

+ *       can only happen because programming errors.

+ */

+#if !defined(STM32_SPI1_DMA_ERROR_HOOK) || defined(__DOXYGEN__)

+#define STM32_SPI1_DMA_ERROR_HOOK() chSysHalt()

+#endif

+

+/**

+ * @brief SPI2 DMA error hook.

+ * @note The default action for DMA errors is a system halt because DMA error

+ *       can only happen because programming errors.

+ */

+#if !defined(STM32_SPI2_DMA_ERROR_HOOK) || defined(__DOXYGEN__)

+#define STM32_SPI2_DMA_ERROR_HOOK() chSysHalt()

+#endif

+

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

+/* Driver data structures and types.                                         */

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

+

+/**

+ * @brief Driver configuration structure.
+ */

+typedef struct {

+  /**

+   * @brief The chip select line port.
+   */

+  ioportid_t            spc_ssport;

+  /**

+   * @brief The chip select line pad number.
+   */

+  uint16_t              spc_sspad;

+  /**

+   * @brief SPI initialization data.

+   */

+  uint16_t              spc_cr1;

+} SPIConfig;

+

+/**

+ * @brief Structure representing a SPI driver.

+ */

+typedef struct {

+  /**

+   * @brief Driver state.
+   */

+  spistate_t            spd_state;

+#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)

+#if CH_USE_MUTEXES || defined(__DOXYGEN__)

+  /**

+   * @brief Mutex protecting the bus.

+   */

+  Mutex                 spd_mutex;

+#elif CH_USE_SEMAPHORES

+  Semaphore             spd_semaphore;

+#endif

+#endif /* SPI_USE_MUTUAL_EXCLUSION */

+  /**

+   * @brief Current configuration data.

+   */

+  const SPIConfig       *spd_config;

+  /* End of the mandatory fields.*/

+  /**

+   * @brief Thread waiting for I/O completion.
+   */

+  Thread                *spd_thread;

+  /**

+   * @brief Pointer to the SPIx registers block.
+   */

+  SPI_TypeDef           *spd_spi;

+  /**

+   * @brief Pointer to the receive DMA channel registers block.

+   */

+  DMA_Channel_TypeDef   *spd_dmarx;

+  /**

+   * @brief Pointer to the transmit DMA channel registers block.

+   */

+  DMA_Channel_TypeDef   *spd_dmatx;

+  /**

+   * @brief DMA priority bit mask.
+   */

+  uint32_t              spd_dmaprio;

+} SPIDriver;

+

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

+/* External declarations.                                                    */

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

+

+/** @cond never*/

+#if USE_STM32_SPI1

+extern SPIDriver SPID1;

+#endif

+

+#if USE_STM32_SPI2

+extern SPIDriver SPID2;

+#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);

+#ifdef __cplusplus

+}

+#endif

+/** @endcond*/

+

+#endif /* CH_HAL_USE_SPI */

+

+#endif /* _SPI_LLD_H_ */

+

+/** @} */