5 files changed, 257 insertions, 18 deletions
diff --git a/os/io/platforms/STM32/spi_lld.c b/os/io/platforms/STM32/spi_lld.c
new file mode 100644
index 000000000..4ef99e1ed
--- /dev/null
+++ b/os/io/platforms/STM32/spi_lld.c
@@ -0,0 +1,86 @@
+/*
+    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 templates/spi_lld.c
+ * @brief SPI Driver subsystem low level driver source template
+ * @addtogroup SPI_LLD
+ * @{
+ */
+
+#include <ch.h>
+#include <spi.h>
+
+/**
+ * @brief Low level SPI driver initialization.
+ */
+void spi_lld_init(void) {
+
+}
+
+/**
+ * @brief Low level SPI bus setup.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_setup(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief Asserts the chip select signal and prepares for transfers.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_select(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief De-asserts the chip select signal.
+ * @details The previously selected peripheral is unselected.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_unselect(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief Exchanges data on the SPI bus.
+ * @details This function performs a simultaneous transmit/receive operation.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ * @param n number of words to be exchanged
+ * @param rxbuf the pointer to the receive buffer, if @p NULL is specified then
+ *              the input data is discarded.
+ *              Note that the buffer is organized as an uint8_t array for
+ *              data sizes below or equal to 8 bits else it is organized as
+ *              an uint16_t array.
+ * @param txbuf the pointer to the transmit buffer, if @p NULL is specified all
+ *              ones are transmitted.
+ *              Note that the buffer is organized as an uint8_t array for
+ *              data sizes below or equal to 8 bits else it is organized as
+ *              an uint16_t array.
+ */
+void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf) {
+
+}
+
+/** @} */
diff --git a/os/io/platforms/STM32/spi_lld.h b/os/io/platforms/STM32/spi_lld.h
new file mode 100644
index 000000000..26a70d0a4
--- /dev/null
+++ b/os/io/platforms/STM32/spi_lld.h
@@ -0,0 +1,112 @@
+/*
+    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 templates/spi_lld.h
+ * @brief SPI Driver subsystem low level driver header template
+ * @addtogroup SPI_LLD
+ * @{
+ */
+
+#ifndef _SPI_LLD_H_
+#define _SPI_LLD_H_
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief Enables the mutual exclusion APIs on the SPI bus.
+ */
+#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define SPI_USE_MUTUAL_EXCLUSION    TRUE
+#endif
+
+#if SPI_USE_MUTUAL_EXCLUSION && !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
+#error "SPI_USE_MUTUAL_EXCLUSION requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief Driver state machine possible states.
+ */
+typedef enum {
+  SPI_UNINIT = 0,//!< SPI_UNINIT
+  SPI_IDLE = 1,  //!< SPI_IDLE
+  SPI_ACTIVE = 2 //!< SPI_ACTIVE
+} spistate_t;
+
+/**
+ * @brief Driver configuration structure.
+ */
+typedef struct {
+  /**
+   * @brief Clock pulses to be generated after initialization.
+   */
+  cnt_t                 spc_clkpulses;
+  /* End of the mandatory fields.*/
+} SPIConfig;
+
+/**
+ * @brief Structure representing a MAC 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 */
+  /**
+   * Current configuration data.
+   */
+  const SPIConfig       *spd_config;
+  /* End of the mandatory fields.*/
+} SPIDriver;
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void spi_lld_init(void);
+  void spi_lld_setup(SPIDriver *spip);
+  void spi_lld_select(SPIDriver *spip);
+  void spi_lld_unselect(SPIDriver *spip);
+  void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SPI_LLD_H_ */
+
+/** @} */
diff --git a/os/io/spi.c b/os/io/spi.c
index 7060c693d..2ea8f8909 100644
--- a/os/io/spi.c
+++ b/os/io/spi.c
@@ -27,17 +27,6 @@
 #include <ch.h>
 #include <spi.h>
 
-/*
- * The following macros are used to enforce a correct sequence of operations
- * when the OS asserts are enabled. The overhead is removed when not in debug
- * mode.
- */
-#ifdef CH_DBG_ENABLE_ASSERTS
-#define SPI_SET_STATE(spip, sts) (spip)->spd_state = (sts)
-#else
-#define SPI_SET_STATE(spip, sts)
-#endif
-
 /**
  * @brief SPI Driver initialization.
  */
@@ -53,7 +42,7 @@ void spiInit(void) {
  */
 void spiObjectInit(SPIDriver *spip) {
 
-  SPI_SET_STATE(spip, SPI_IDLE);
+  spip->spd_state = SPI_IDLE;
 #if CH_USE_MUTEXES
   chMtxInit(&spip->spd_mutex);
 #elif CH_USE_SEMAPHORES
@@ -80,10 +69,8 @@ void spiSetup(SPIDriver *spip, const SPIConfig *config) {
 
 /**
  * @brief Asserts the chip select signal and prepares for transfers.
- * @details The SPI bus is configured and a peripheral selected.
  *
  * @param[in] spip pointer to the @p SPIDriver object
- * @param config pointer to the @p SPIConfig object
  */
 void spiSelect(SPIDriver *spip) {
 
@@ -94,7 +81,7 @@ void spiSelect(SPIDriver *spip) {
               "not idle");
 
   spi_lld_select(spip);
-  SPI_SET_STATE(spip, SPI_ACTIVE);
+  spip->spd_state = SPI_ACTIVE;
   chSysUnlock();
 }
 
@@ -113,7 +100,7 @@ void spiUnselect(SPIDriver *spip) {
               "not locked");
 
   spi_lld_unselect(spip);
-  SPI_SET_STATE(spip, SPI_IDLE);
+  spip->spd_state = SPI_IDLE;
   chSysUnlock();
 }
 
@@ -174,6 +161,7 @@ void spiAcquireBus(SPIDriver *spip) {
 void spiReleaseBus(SPIDriver *spip) {
 
 #if CH_USE_MUTEXES
+  (void)spip;
   chMtxUnlock();
 #elif CH_USE_SEMAPHORES
   chSemSignal(&spip->spd_semaphore);
diff --git a/os/io/templates/spi_lld.c b/os/io/templates/spi_lld.c
index 172edbc07..4ef99e1ed 100644
--- a/os/io/templates/spi_lld.c
+++ b/os/io/templates/spi_lld.c
@@ -27,5 +27,60 @@
 #include <ch.h>
 #include <spi.h>
 
+/**
+ * @brief Low level SPI driver initialization.
+ */
+void spi_lld_init(void) {
+
+}
+
+/**
+ * @brief Low level SPI bus setup.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_setup(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief Asserts the chip select signal and prepares for transfers.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_select(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief De-asserts the chip select signal.
+ * @details The previously selected peripheral is unselected.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ */
+void spi_lld_unselect(SPIDriver *spip) {
+
+}
+
+/**
+ * @brief Exchanges data on the SPI bus.
+ * @details This function performs a simultaneous transmit/receive operation.
+ *
+ * @param[in] spip pointer to the @p SPIDriver object
+ * @param n number of words to be exchanged
+ * @param rxbuf the pointer to the receive buffer, if @p NULL is specified then
+ *              the input data is discarded.
+ *              Note that the buffer is organized as an uint8_t array for
+ *              data sizes below or equal to 8 bits else it is organized as
+ *              an uint16_t array.
+ * @param txbuf the pointer to the transmit buffer, if @p NULL is specified all
+ *              ones are transmitted.
+ *              Note that the buffer is organized as an uint8_t array for
+ *              data sizes below or equal to 8 bits else it is organized as
+ *              an uint16_t array.
+ */
+void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf) {
+
+}
 
 /** @} */
diff --git a/os/io/templates/spi_lld.h b/os/io/templates/spi_lld.h
index 8b17ace1a..26a70d0a4 100644
--- a/os/io/templates/spi_lld.h
+++ b/os/io/templates/spi_lld.h
@@ -70,12 +70,10 @@ typedef struct {
  * @brief Structure representing a MAC driver.
  */
 typedef struct {
-#if CH_DBG_ENABLE_ASSERTS || defined(__DOXYGEN__)
   /**
    * @brief Driver state.
    */
   spistate_t            spd_state;
-#endif /* CH_DBG_ENABLE_ASSERTS */
 #if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
 #if CH_USE_MUTEXES || defined(__DOXYGEN__)
   /**