Add os/hal/platforms/LPC8xx/spi_lld

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5534 35acf78f-673a-0410-8e92-d51de3d6d3f4

3 files changed, 671 insertions, 0 deletions

diff --git a/os/hal/platforms/LPC8xx/platform.mk b/os/hal/platforms/LPC8xx/platform.mk
index be0190665..31f20d16c 100644
--- a/os/hal/platforms/LPC8xx/platform.mk
+++ b/os/hal/platforms/LPC8xx/platform.mk
@@ -3,6 +3,7 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/LPC8xx/hal_lld.c \
               ${CHIBIOS}/os/hal/platforms/LPC8xx/gpt_lld.c \

               ${CHIBIOS}/os/hal/platforms/LPC8xx/pal_lld.c \

               ${CHIBIOS}/os/hal/platforms/LPC8xx/serial_lld.c \

+              ${CHIBIOS}/os/hal/platforms/LPC8xx/spi_lld.c \

               ${CHIBIOS}/os/hal/platforms/LPC8xx/ext_lld.c \

               ${CHIBIOS}/os/hal/platforms/LPC8xx/ext_lld_isr.c 

 

diff --git a/os/hal/platforms/LPC8xx/spi_lld.c b/os/hal/platforms/LPC8xx/spi_lld.c
new file mode 100644
index 000000000..f9f4a9409
--- /dev/null
+++ b/os/hal/platforms/LPC8xx/spi_lld.c
@@ -0,0 +1,385 @@
+/*

+    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    LPC8xx/spi_lld.c

+ * @brief   LPC8xx low level SPI driver code.

+ *

+ * @addtogroup SPI

+ * @{

+ */

+

+#include "ch.h"

+#include "hal.h"

+

+#if HAL_USE_SPI || defined(__DOXYGEN__)

+

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

+/* Driver exported variables.                                                */

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

+

+#if LPC8xx_SPI_USE_SPI0 || defined(__DOXYGEN__)

+/** @brief SPI1 driver identifier.*/

+SPIDriver SPID1;

+#endif

+

+#if LPC8xx_SPI_USE_SPI1 || defined(__DOXYGEN__)

+/** @brief SPI2 driver identifier.*/

+SPIDriver SPID2;

+#endif

+

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

+/* Driver local variables and types.                                         */

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

+

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

+/* Driver local functions.                                                   */

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

+

+static void spi_load_txdata(SPIDriver *spip) {

+

+  LPC_SPI_TypeDef *spi = spip->spi;

+

+  if (--spip->txcnt == 0) {

+    spi->TXCTRL |= SPI_TXCTRL_EOT;

+  }

+  

+  if (spip->txptr != NULL) {

+    if ((spi->TXCTRL & SPI_TXCTRL_FLEN_MASK) > SPI_TXCTRL_FLEN(8)) {

+      const uint16_t *p = spip->txptr;

+      spi->TXDAT = *p++;

+      spip->txptr = p;

+    }

+    else {

+      const uint8_t *p = spip->txptr;

+      spi->TXDAT = *p++;

+      spip->txptr = p;

+    }

+  }

+  else

+    spi->TXDAT = 0xffff;

+}

+

+/**

+ * @brief   Common IRQ handler.

+ *

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

+ */

+static void spi_serve_interrupt(SPIDriver *spip) {

+

+  LPC_SPI_TypeDef *spi = spip->spi;

+

+  if (spi->INTSTAT & (SPI_STAT_RXOV | SPI_STAT_TXUR)) {

+    /* The overflow condition should never happen becausepriority is given

+       to receive but a hook macro is provided anyway...*/

+    LPC8xx_SPI_ERROR_HOOK(spip);

+    spi->STAT = (SPI_STAT_RXOV | SPI_STAT_TXUR);

+  }

+  

+  if (spi->INTSTAT & SPI_STAT_TXRDY) {

+    spi_load_txdata( spip );

+  }

+

+  if (spip->txcnt == 0) {

+    spi->INTENCLR = (SPI_STAT_TXRDY | SPI_STAT_TXUR);

+  }

+

+  if (spi->INTSTAT & SPI_STAT_RXRDY) {

+    if (spip->rxptr != NULL) {

+      if ((spi->TXCTRL & SPI_TXCTRL_FLEN_MASK) > SPI_TXCTRL_FLEN(8)) {

+        uint16_t *p = spip->rxptr;

+        *p++ = spi->RXDAT;

+        spip->rxptr = p;

+      }

+      else {

+        uint8_t *p = spip->rxptr;

+        *p++ = spi->RXDAT;

+        spip->rxptr = p;

+      }

+    }

+    else

+      (void)spi->RXDAT;

+      

+    if (--spip->rxcnt == 0) {

+      chDbgAssert(spip->txcnt == 0,

+                  "spi_serve_interrupt(), #1", "counter out of synch");

+      /* Stops the IRQ sources.*/

+      spi->INTENCLR = (SPI_STAT_RXRDY | SPI_STAT_TXRDY |

+                        SPI_STAT_RXOV | SPI_STAT_TXUR);

+

+      /* Portable SPI ISR code defined in the high level driver, note, it is

+         a macro.*/

+      _spi_isr_code(spip);

+      return;

+    }

+  }

+

+}

+

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

+/* Driver interrupt handlers.                                                */

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

+

+#if LPC8xx_SPI_USE_SPI0 || defined(__DOXYGEN__)

+/**

+ * @brief   SPI0 interrupt handler.

+ *

+ * @isr

+ */

+CH_IRQ_HANDLER(Vector40) {

+

+  CH_IRQ_PROLOGUE();

+  spi_serve_interrupt(&SPID1);

+  CH_IRQ_EPILOGUE();

+}

+#endif

+

+#if LPC8xx_SPI_USE_SPI1 || defined(__DOXYGEN__)

+/**

+ * @brief   SPI1 interrupt handler.

+ *

+ * @isr

+ */

+CH_IRQ_HANDLER(Vector44) {

+

+  CH_IRQ_PROLOGUE();

+  spi_serve_interrupt(&SPID2);

+  CH_IRQ_EPILOGUE();

+}

+#endif

+

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

+/* Driver exported functions.                                                */

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

+

+/**

+ * @brief   Low level SPI driver initialization.

+ *

+ * @notapi

+ */

+void spi_lld_init(void) {

+

+#if LPC8xx_SPI_USE_SPI0

+  spiObjectInit(&SPID1);

+  SPID1.spi = LPC_SPI0;  

+#endif

+

+#if LPC8xx_SPI_USE_SPI1

+  spiObjectInit(&SPID2);

+  SPID2.spi = LPC_SPI1;

+#endif

+}

+

+/**

+ * @brief   Configures and activates the SPI peripheral.

+ *

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

+ *

+ * @notapi

+ */

+void spi_lld_start(SPIDriver *spip) {

+

+  if (spip->state == SPI_STOP) {

+#if LPC8xx_SPI_USE_SPI0

+    if (&SPID1 == spip) {

+      LPC_SYSCON->SYSAHBCLKCTRL |= (1<<11);

+      LPC_SYSCON->PRESETCTRL |= (1<<0);

+      spip->spi->DIV = LPC8xx_SPI_SPI0CLKDIV;

+      nvicEnableVector(SPI0_IRQn,

+                       CORTEX_PRIORITY_MASK(LPC8xx_SPI_SPI0_IRQ_PRIORITY));

+    }

+#endif

+#if LPC8xx_SPI_USE_SPI1

+    if (&SPID2 == spip) {

+      LPC_SYSCON->SYSAHBCLKCTRL |= (1<<12);

+      LPC_SYSCON->PRESETCTRL |= (1<<1);

+      spip->spi->DIV = LPC8xx_SPI_SPI1CLKDIV;

+      nvicEnableVector(SPI1_IRQn,

+                       CORTEX_PRIORITY_MASK(LPC8xx_SPI_SPI1_IRQ_PRIORITY));

+    }

+#endif

+  }

+

+  spip->spi->DLY    = spip->config->dly;

+  spip->spi->TXCTRL = spip->config->txctrl;

+  spip->spi->STAT   = (SPI_STAT_RXOV | SPI_STAT_TXUR);

+  spip->spi->CFG    = spip->config->cfg | SPI_CFG_ENABLE;

+}

+

+/**

+ * @brief   Deactivates the SPI peripheral.

+ *

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

+ *

+ * @notapi

+ */

+void spi_lld_stop(SPIDriver *spip) {

+

+  if (spip->state != SPI_STOP) {

+    spip->spi->CFG = 0;

+    

+#if LPC8xx_SPI_USE_SPI0

+    if (&SPID1 == spip) {

+      nvicDisableVector(SPI0_IRQn);

+      LPC_SYSCON->PRESETCTRL &= ~(1<<0);

+      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<11);

+    }

+#endif

+

+#if LPC8xx_SPI_USE_SPI1

+    if (&SPID2 == spip) {

+      nvicDisableVector(SPI1_IRQn);

+      LPC_SYSCON->PRESETCTRL &= ~(1<<1);

+      LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<12);

+    }

+#endif

+

+  }

+}

+

+/**

+ * @brief   Asserts the slave select signal and prepares for transfers.

+ *

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

+ *

+ * @notapi

+ */

+void spi_lld_select(SPIDriver *spip) {

+  /* Hardware controls SSEL */

+  (void)spip;

+}

+

+/**

+ * @brief   Deasserts the slave select signal.

+ * @details The previously selected peripheral is unselected.

+ *

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

+ *

+ * @notapi

+ */

+void spi_lld_unselect(SPIDriver *spip) {

+  /* Hardware controls SSEL */

+  (void)spip;

+}

+

+/**

+ * @brief   Exchanges data on the SPI bus.

+ * @details This asynchronous function starts a simultaneous transmit/receive

+ *          operation.

+ * @post    At the end of the operation the configured callback is invoked.

+ * @note    The buffers are organized as uint8_t arrays for data sizes below or

+ *          equal to 8 bits else it is organized as uint16_t arrays.

+ *

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

+ * @param[in] n         number of words to be exchanged

+ * @param[in] txbuf     the pointer to the transmit buffer

+ * @param[out] rxbuf    the pointer to the receive buffer

+ *

+ * @notapi

+ */

+void spi_lld_exchange(SPIDriver *spip, size_t n,

+                      const void *txbuf, void *rxbuf) {

+

+  spip->rxptr = rxbuf;

+  spip->txptr = txbuf;

+  spip->rxcnt = spip->txcnt = n;

+  spip->spi->TXCTRL &= ~SPI_TXCTRL_EOT;

+  spi_load_txdata(spip);

+

+  if (spip->txcnt == 0)

+    spip->spi->INTENSET = (SPI_STAT_RXRDY | SPI_STAT_RXOV);

+  else

+    spip->spi->INTENSET = (SPI_STAT_RXRDY | SPI_STAT_TXRDY |

+                            SPI_STAT_RXOV | SPI_STAT_TXUR);

+  

+}

+

+/**

+ * @brief   Ignores data on the SPI bus.

+ * @details This function transmits a series of idle words on the SPI bus and

+ *          ignores the received data. This function can be invoked even

+ *          when a slave select signal has not been yet asserted.

+ *

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

+ * @param[in] n         number of words to be ignored

+ *

+ * @notapi

+ */

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

+

+  spi_lld_exchange( spip, n, NULL, NULL);

+}

+

+/**

+ * @brief   Sends data over the SPI bus.

+ * @details This asynchronous function starts a transmit operation.

+ * @post    At the end of the operation the configured callback is invoked.

+ * @note    The buffers are organized as uint8_t arrays for data sizes below or

+ *          equal to 8 bits else it is organized as uint16_t arrays.

+ *

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

+ * @param[in] n         number of words to send

+ * @param[in] txbuf     the pointer to the transmit buffer

+ *

+ * @notapi

+ */

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

+

+  spi_lld_exchange( spip, n, txbuf, NULL);

+}

+

+/**

+ * @brief   Receives data from the SPI bus.

+ * @details This asynchronous function starts a receive operation.

+ * @post    At the end of the operation the configured callback is invoked.

+ * @note    The buffers are organized as uint8_t arrays for data sizes below or

+ *          equal to 8 bits else it is organized as uint16_t arrays.

+ *

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

+ * @param[in] n         number of words to receive

+ * @param[out] rxbuf    the pointer to the receive buffer

+ *

+ * @notapi

+ */

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

+

+  spi_lld_exchange( spip, n, NULL, rxbuf);

+}

+

+/**

+ * @brief   Exchanges one frame using a polled wait.

+ * @details This synchronous function exchanges one frame using a polled

+ *          synchronization method. This function is useful when exchanging

+ *          small amount of data on high speed channels, usually in this

+ *          situation is much more efficient just wait for completion using

+ *          polling than suspending the thread waiting for an interrupt.

+ *

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

+ * @param[in] frame     the data frame to send over the SPI bus

+ * @return              The received data frame from the SPI bus.

+ */

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

+

+  spip->spi->TXCTRL |= SPI_TXCTRL_EOT;

+  spip->spi->TXDAT = frame;

+  while ((spip->spi->STAT & SPI_STAT_RXRDY) == 0)

+    ;

+  return (uint16_t)spip->spi->RXDAT;

+}

+

+#endif /* HAL_USE_SPI */

+

+/** @} */

diff --git a/os/hal/platforms/LPC8xx/spi_lld.h b/os/hal/platforms/LPC8xx/spi_lld.h
new file mode 100644
index 000000000..4acd52547
--- /dev/null
+++ b/os/hal/platforms/LPC8xx/spi_lld.h
@@ -0,0 +1,285 @@
+/*

+    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    LPC8xx/spi_lld.h

+ * @brief   LPC8xx low level SPI driver header.

+ *

+ * @addtogroup SPI

+ * @{

+ */

+

+#ifndef _SPI_LLD_H_

+#define _SPI_LLD_H_

+

+#if HAL_USE_SPI || defined(__DOXYGEN__)

+

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

+/* Driver constants.                                                         */

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

+

+#define SPI_CFG_ENABLE               (1<<0)

+#define SPI_CFG_MASTER               (1<<2)

+#define SPI_CFG_LSBF                 (1<<3)

+#define SPI_CFG_CHPA                 (1<<4)

+#define SPI_CFG_CPOL                 (1<<5)

+#define SPI_CFG_LOOP                 (1<<7)

+#define SPI_CFG_SPOL                 (1<<8)

+

+#define SPI_DLY_PRE(n)               (((n)&0x0f)<< 0)

+#define SPI_DLY_POST(n)              (((n)&0x0f)<< 4)

+#define SPI_DLY_FRAME(n)             (((n)&0x0f)<< 8)

+#define SPI_DLY_TFER(n)              (((n)&0x0f)<<12)

+

+#define SPI_STAT_RXRDY                (1<<0)

+#define SPI_STAT_TXRDY                (1<<1)

+#define SPI_STAT_RXOV                 (1<<2)

+#define SPI_STAT_TXUR                 (1<<3)

+#define SPI_STAT_SSA                  (1<<4)

+#define SPI_STAT_SSD                  (1<<5)

+#define SPI_STAT_STALL                (1<<6)

+#define SPI_STAT_EOT                  (1<<7)

+#define SPI_STAT_IDLE                 (1<<8)

+

+#define SPI_TXCTRL_TXSSELN          (1<<16)

+#define SPI_TXCTRL_EOT              (1<<20)

+#define SPI_TXCTRL_EOF              (1<<21)

+#define SPI_TXCTRL_RXIGNORE         (1<<22)

+#define SPI_TXCTRL_FLEN(n)          (((n)-1)<<24)

+#define SPI_TXCTRL_FLEN_MASK        (0x0f<<24)

+

+

+

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

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

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

+

+/**

+ * @brief   SPI1 driver enable switch.

+ * @details If set to @p TRUE the support for device SPI0 is included.

+ * @note    The default is @p TRUE.

+ */

+#if !defined(LPC8xx_SPI_USE_SPI0) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_USE_SPI0                TRUE

+#endif

+

+/**

+ * @brief   SPI2 driver enable switch.

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

+ * @note    The default is @p TRUE.

+ */

+#if !defined(LPC8xx_SPI_USE_SPI1) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_USE_SPI1                FALSE

+#endif

+

+/**

+ * @brief   SPI0 PCLK divider.

+ */

+#if !defined(LPC8xx_SPI_SPI0CLKDIV) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_SPI0CLKDIV              1

+#endif

+

+/**

+ * @brief   SPI1 PCLK divider.

+ */

+#if !defined(LPC8xx_SPI_SPI1CLKDIV) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_SPI1CLKDIV              1

+#endif

+

+/**

+ * @brief   SPI0 interrupt priority level setting.

+ */

+#if !defined(LPC8xx_SPI_SPI0_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_SPI0_IRQ_PRIORITY       1

+#endif

+

+/**

+ * @brief   SPI1 interrupt priority level setting.

+ */

+#if !defined(LPC8xx_SPI_SPI1_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_SPI1_IRQ_PRIORITY       1

+#endif

+

+/**

+ * @brief   Overflow error hook.

+ * @details The default action is to stop the system.

+ */

+#if !defined(LPC8xx_SPI_ERROR_HOOK) || defined(__DOXYGEN__)

+#define LPC8xx_SPI_ERROR_HOOK(spip)    chSysHalt()

+#endif

+

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

+/* Derived constants and error checks.                                       */

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

+

+#if (LPC8xx_SPI_SPI0CLKDIV < 1) || (LPC8xx_SPI_SPI0CLKDIV > 255)

+#error "invalid LPC8xx_SPI_SSP0CLKDIV setting"

+#endif

+

+#if (LPC8xx_SPI_SPI1CLKDIV < 1) || (LPC8xx_SPI_SPI1CLKDIV > 255)

+#error "invalid LPC8xx_SPI_SSP1CLKDIV setting"

+#endif

+

+#if !LPC8xx_SPI_USE_SPI0 && !LPC8xx_SPI_USE_SPI1

+#error "SPI driver activated but no SPI peripheral assigned"

+#endif

+

+/**

+ * @brief   SPI0 clock.

+ */

+#define LPC8xx_SPI_SPI0_PCLK                                               \

+  (LPC8xx_SYSCLK / LPC8xx_SPI_SPI0CLKDIV)

+

+/**

+ * @brief   SPI1 clock.

+ */

+#define LPC8xx_SPI_SPI1_PCLK                                               \

+  (LPC8xx_SYSCLK / LPC8xx_SPI_SPI1CLKDIV)

+

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

+/* 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.

+ */

+typedef struct {

+  /**

+   * @brief Operation complete callback or @p NULL.

+   */

+  spicallback_t         end_cb;

+  /* End of the mandatory fields.*/

+

+  /**

+   * @brief SPI CFG initialization data.

+   */

+  uint16_t              cfg;

+  /**

+   * @brief SPI DLY initialization data.

+   */

+  uint16_t              dly;

+  /**

+   * @brief SPI TXCTRL initialization data.

+   */

+  uint32_t              txctrl;

+} SPIConfig;

+

+/**

+ * @brief   Structure representing a SPI driver.

+ */

+struct SPIDriver {

+  /**

+   * @brief Driver state.

+   */

+  spistate_t            state;

+  /**

+   * @brief Current configuration data.

+   */

+  const 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

+  /* End of the mandatory fields.*/

+  /**

+   * @brief Pointer to the SPI registers block.

+   */

+  LPC_SPI_TypeDef       *spi;

+  /**

+   * @brief Number of words yet to be received.

+   */

+  uint32_t              rxcnt;

+  /**

+   * @brief Receive pointer or @p NULL.

+   */

+  void                  *rxptr;

+  /**

+   * @brief Number of words yet to be transmitted.

+   */

+  uint32_t              txcnt;

+  /**

+   * @brief Transmit pointer or @p NULL.

+   */

+  const void            *txptr;

+};

+

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

+/* Driver macros.                                                            */

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

+

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

+/* External declarations.                                                    */

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

+

+#if LPC8xx_SPI_USE_SPI0 && !defined(__DOXYGEN__)

+extern SPIDriver SPID1;

+#endif

+

+#if LPC8xx_SPI_USE_SPI1 && !defined(__DOXYGEN__)

+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);

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

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* HAL_USE_SPI */

+

+#endif /* _SPI_LLD_H_ */

+

+/** @} */