Diff: source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Csma.c

Revision:

67:93bec0baf1de

Parent:

34:edda6a7238ec

--- a/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Csma.c	Wed Jul 05 14:02:16 2017 +0200
+++ b/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Csma.c	Thu Jul 06 11:13:31 2017 +0200
@@ -1,600 +1,600 @@
-/**
-  ******************************************************************************
-  * @file    SPIRIT_Csma.c
-  * @author  VMA division - AMS
-  * @version 3.2.2
-  * @date    08-July-2015
-  * @brief   Configuration and management of SPIRIT CSMA.
-  * @details
-  * @attention
-  *
-  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
-  *
-  * Redistribution and use in source and binary forms, with or without modification,
-  * are permitted provided that the following conditions are met:
-  *   1. Redistributions of source code must retain the above copyright notice,
-  *      this list of conditions and the following disclaimer.
-  *   2. Redistributions in binary form must reproduce the above copyright notice,
-  *      this list of conditions and the following disclaimer in the documentation
-  *      and/or other materials provided with the distribution.
-  *   3. Neither the name of STMicroelectronics nor the names of its contributors
-  *      may be used to endorse or promote products derived from this software
-  *      without specific prior written permission.
-  *
-  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-  *
-  ******************************************************************************
-  */
-
-/* Includes ------------------------------------------------------------------*/
-#include "SPIRIT_Csma.h"
-#include "MCU_Interface.h"
-
-
-/**
- * @addtogroup SPIRIT_Libraries
- * @{
- */
-
-
-/**
- * @addtogroup SPIRIT_Csma
- * @{
- */
-
-
-/**
- * @defgroup Csma_Private_TypesDefinitions      CSMA Private TypesDefinitions
- * @{
- */
-
-
-/**
- *@}
- */
-
-
-/**
- * @defgroup Csma_Private_Defines               CSMA Private Defines
- * @{
- */
-
-/**
- *@}
- */
-
-
-/**
- * @defgroup Csma_Private_Macros               CSMA Private Macros
- * @{
- */
-
-/**
- *@}
- */
-
-
-/**
- * @defgroup Csma_Private_Variables             CSMA Private Variables
- * @{
- */
-
-/**
- *@}
- */
-
-
-
-/**
- * @defgroup Csma_Private_FunctionPrototypes    CSMA Private FunctionPrototypes
- * @{
- */
-
-/**
- *@}
- */
-
-
-/**
- * @defgroup Csma_Private_Functions             CSMA Private Functions
- * @{
- */
-
-
-/**
- * @brief  Initializes the SPIRIT CSMA according to the specified parameters in the CsmaInit.
- * @param  pxCsmaInit Csma init structure.
- *         This parameter is a pointer to @ref CsmaInit.
- * @retval None.
- */
-void SpiritCsmaInit(CsmaInit* pxCsmaInit)
-{
-  uint8_t tempRegValue[5];
-
-  /* Check the parameters */
-  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxCsmaInit->xCsmaPersistentMode));
-  s_assert_param(IS_CCA_PERIOD(pxCsmaInit->xMultiplierTbit));
-  s_assert_param(IS_CSMA_LENGTH(pxCsmaInit->xCcaLength));
-  s_assert_param(IS_BU_COUNTER_SEED(pxCsmaInit->nBuCounterSeed));
-  s_assert_param(IS_BU_PRESCALER(pxCsmaInit->cBuPrescaler));
-  s_assert_param(IS_CMAX_NB(pxCsmaInit->cMaxNb));
-
-  /* CSMA BU counter seed (MSB) config */
-  tempRegValue[0] = (uint8_t)(pxCsmaInit->nBuCounterSeed >> 8);
-
-  /* CSMA BU counter seed (LSB) config */
-  tempRegValue[1] = (uint8_t) pxCsmaInit->nBuCounterSeed;
-
-  /* CSMA BU prescaler config and CCA period config */
-  tempRegValue[2] = (pxCsmaInit->cBuPrescaler << 2) | pxCsmaInit->xMultiplierTbit;
-
-  /* CSMA CCA length config and max number of back-off */
-  tempRegValue[3] = (pxCsmaInit->xCcaLength | pxCsmaInit->cMaxNb);
-
-  /* Reads the PROTOCOL1_BASE register value, to write the SEED_RELOAD and CSMA_PERS_ON fields */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
-
-  /* Writes the new value for persistent mode */
-  if(pxCsmaInit->xCsmaPersistentMode==S_ENABLE)
-  {
-    tempRegValue[4] |= PROTOCOL1_CSMA_PERS_ON_MASK;
-  }
-  else
-  {
-    tempRegValue[4] &= ~PROTOCOL1_CSMA_PERS_ON_MASK;
-  }
-
-  /* Writes PROTOCOL1_BASE register */
-  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
-
-  /* Writes CSMA_CONFIGx_BASE registers */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG3_BASE, 4, tempRegValue);
-
-}
-
-
- /**
-  * @brief  Returns the fitted structure CsmaInit starting from the registers values.
-  * @param  pxCsmaInit Csma structure to be fitted.
-  *         This parameter is a pointer to @ref CsmaInit.
-  * @retval None.
-  */
-void SpiritCsmaGetInfo(CsmaInit* pxCsmaInit)
-{
-   uint8_t tempRegValue[5];
-
-   /* Reads PROTOCOL1_BASE register */
-   g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
-
-   /* Reads CSMA_CONFIGx_BASE registers */
-   g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG3_BASE, 4, tempRegValue);
-
-   /* Reads the bu counter seed */
-   pxCsmaInit->nBuCounterSeed = (uint16_t)tempRegValue[1] | ((uint16_t)(tempRegValue[0] << 8));
-
-   /* Reads the bu prescaler */
-   pxCsmaInit->cBuPrescaler = tempRegValue[2]>>2;
-
-   /* Reads the Cca period */
-   pxCsmaInit->xMultiplierTbit = (CcaPeriod)(tempRegValue[2] & 0x03);
-
-   /* Reads the Cca length */
-   pxCsmaInit->xCcaLength = (CsmaLength)(tempRegValue[3]&0xF0);
-
-   /* Reads the max number of back off */
-   pxCsmaInit->cMaxNb = tempRegValue[3] & 0x07;
-
-   /* Reads the persistent mode enable bit */
-   pxCsmaInit->xCsmaPersistentMode = (SpiritFunctionalState)((tempRegValue[4]>>1) & 0x01);
-
-}
-
-
-/**
- * @brief  Enables or Disables the CSMA.
- * @param  xNewState the state of the CSMA mode.
- *         This parameter can be: S_ENABLE or S_DISABLE.
- * @retval None.
- */
-void SpiritCsma(SpiritFunctionalState xNewState)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Sets or resets the CSMA enable bit */
-  if(xNewState==S_ENABLE)
-  {
-    tempRegValue |= PROTOCOL1_CSMA_ON_MASK;
-  }
-  else
-  {
-    tempRegValue &= ~PROTOCOL1_CSMA_ON_MASK;
-  }
-
-  /* Writes the new value on the PROTOCOL1 register */
-  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-}
-
-/**
- * @brief  Gets the CSMA mode. Says if it is enabled or disabled.
- * @param  None.
- * @retval SpiritFunctionalState: CSMA mode.
- */
-SpiritFunctionalState SpiritCsmaGetCsma(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Return if set or reset */
-  if(tempRegValue & PROTOCOL1_CSMA_ON_MASK)
-  {
-    return S_ENABLE;
-  }
-  else
-  {
-    return S_DISABLE;
-  }
-
-}
-
-/**
- * @brief  Enables or Disables the persistent CSMA mode.
- * @param  xNewState the state of the persistent CSMA mode.
- *         This parameter can be: S_ENABLE or S_DISABLE.
- * @retval None.
- */
-void SpiritCsmaPersistentMode(SpiritFunctionalState xNewState)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Enables/disables the CSMA persistent mode */
-  if(xNewState==S_ENABLE)
-  {
-    tempRegValue |= PROTOCOL1_CSMA_PERS_ON_MASK;
-  }
-  else
-  {
-    tempRegValue &= ~PROTOCOL1_CSMA_PERS_ON_MASK;
-  }
-
-  /* Writes the new vaue on the PROTOCOL1 register */
-  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-}
-
-
-/**
- * @brief  Gets the persistent CSMA mode.
- * @param  None.
- * @retval SpiritFunctionalState: CSMA persistent mode.
- */
-SpiritFunctionalState SpiritCsmaGetPersistentMode(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Return if set or reset */
-  if(tempRegValue & PROTOCOL1_CSMA_PERS_ON_MASK)
-  {
-    return S_ENABLE;
-  }
-  else
-  {
-    return S_DISABLE;
-  }
-
-}
-
-
-/**
- * @brief  Enables or Disables the seed reload mode (if enabled it reloads the back-off generator seed using the value written in the BU_COUNTER_SEED register).
- * @param  xNewState the state of the seed reload mode.
- *	   This parameter can be: S_ENABLE or S_DISABLE.
- * @retval None.
- */
-void SpiritCsmaSeedReloadMode(SpiritFunctionalState xNewState)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Enables/disables the seed reload mode */
-  if(xNewState==S_ENABLE)
-  {
-    tempRegValue |= PROTOCOL1_SEED_RELOAD_MASK;
-  }
-  else
-  {
-    tempRegValue &= ~PROTOCOL1_SEED_RELOAD_MASK;
-  }
-
-  /* Writes the new value on the PROTOCOL1 register */
-  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-}
-
-
-/**
- * @brief  Gets the seed reload mode.
- * @param  None.
- * @retval SpiritFunctionalState: CSMA seed reload mode.
- */
-SpiritFunctionalState SpiritCsmaGetSeedReloadMode(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the PROTOCOL1 register value */
-  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
-
-  /* Return if set or reset */
-  if(tempRegValue & PROTOCOL1_SEED_RELOAD_MASK)
-  {
-    return S_ENABLE;
-  }
-  else
-  {
-    return S_DISABLE;
-  }
-}
-
-
-/**
- * @brief  Sets the BU counter seed (BU_COUNTER_SEED register). The CSMA back off time is given by the formula: BO = rand(2^NB)*BU.
- * @param  nBuCounterSeed seed of the random number generator used to apply the BBE algorithm.
- *	   This parameter is an uint16_t.
- * @retval None.
- */
-void SpiritCsmaSetBuCounterSeed(uint16_t nBuCounterSeed)
-{
-  uint8_t tempRegValue[2];
-
-  /* Check parameters */
-  s_assert_param(IS_BU_COUNTER_SEED(nBuCounterSeed));
-
-  /* Build value (MSB)*/
-  tempRegValue[0]=(uint8_t)(nBuCounterSeed>>8);
-  /* Build value (LSB) */
-  tempRegValue[1]=(uint8_t)nBuCounterSeed;
-
-  /* Writes the CSMA_CONFIG3 registers */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG3_BASE, 2, tempRegValue);
-
-}
-
-/**
- * @brief  Returns the BU counter seed (BU_COUNTER_SEED register).
- * @param  None.
- * @retval uint16_t Seed of the random number generator used to apply the BBE algorithm.
- */
-uint16_t SpiritCsmaGetBuCounterSeed(void)
-{
-  uint8_t tempRegValue[2];
-
-  /* Reads the CSMA_CONFIGx registers value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG3_BASE, 2, tempRegValue);
-
-  /* Build the counter seed and return it */
-  return ((uint16_t)tempRegValue[1] + (((uint16_t)tempRegValue[0])<<8));
-
-}
-
-
-/**
- * @brief  Sets the BU prescaler. The CSMA back off time is given by the formula: BO = rand(2^NB)*BU.
- * @param  cBuPrescaler used to program the back-off unit BU.
- * 	   This parameter is an uint8_t.
- * @retval None.
- */
-void SpiritCsmaSetBuPrescaler(uint8_t cBuPrescaler)
-{
-  uint8_t tempRegValue;
-
-  /* Check parameters */
-  s_assert_param(IS_BU_PRESCALER(cBuPrescaler));
-
-  /* Reads the CSMA_CONFIG1 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-  /* Build the new value for the BU prescaler */
-  tempRegValue &= 0x03;
-  tempRegValue |= (cBuPrescaler<<2);
-
-  /* Writes the new value on the CSMA_CONFIG1_BASE register */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-}
-
-
-/**
- * @brief  Returns the BU prescaler.
- * @param  None.
- * @retval uint8_t Value back-off unit (BU).
- */
-uint8_t SpiritCsmaGetBuPrescaler(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the CSMA_CONFIG1 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-  /* Build and return the BU prescaler value */
-  return (tempRegValue >> 2);
-
-}
-
-
-/**
- * @brief  Sets the CCA period.
- * @param  xMultiplierTbit value of CCA period to store.
- * 	   This parameter can be a value of @ref CcaPeriod.
- * @retval None.
- */
-void SpiritCsmaSetCcaPeriod(CcaPeriod xMultiplierTbit)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_CCA_PERIOD(xMultiplierTbit));
-
-  /* Reads the CSMA_CONFIG1 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-  /* Build the new value setting the the CCA period */
-  tempRegValue &= 0xFC;
-  tempRegValue |= xMultiplierTbit;
-
-  /* Writes the new value on the CSMA_CONFIG1 register */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-}
-
-
-/**
- * @brief  Returns the CCA period.
- * @param  None.
- * @retval CcaPeriod CCA period.
- */
-CcaPeriod SpiritCsmaGetCcaPeriod(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the CSMA_CONFIG1 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
-
-  /* Build and return the CCA period value */
-  return (CcaPeriod)(tempRegValue & 0x03);
-
-}
-
-
-/**
- * @brief  Sets the CCA length.
- * @param  xCcaLength the CCA length (a value between 1 and 15 that multiplies the CCA period).
- *	   This parameter can be any value of @ref CsmaLength.
- * @retval None.
- */
-void SpiritCsmaSetCcaLength(CsmaLength xCcaLength)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_CSMA_LENGTH(xCcaLength));
-
-  /* Reads the CSMA_CONFIG0 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-
-  /* Build the value of CCA length to be set */
-  tempRegValue &= 0x0F;
-  tempRegValue |= xCcaLength;
-
-  /* Writes the new value on the CSMA_CONFIG0 register */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-
-}
-
-
-/**
- * @brief  Returns the CCA length.
- * @param  None.
- * @retval uint8_t CCA length.
- */
-uint8_t SpiritCsmaGetCcaLength(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the CSMA_CONFIG0 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-
-  /* Build and return the CCA length */
-  return tempRegValue >> 4;
-
-}
-
-
-/**
- * @brief  Sets the max number of back-off. If reached Spirit stops the transmission.
- * @param  cMaxNb the max number of back-off.
- *         This parameter is an uint8_t.
- * @retval None.
- */
-void SpiritCsmaSetMaxNumberBackoff(uint8_t cMaxNb)
-{
-  uint8_t tempRegValue;
-
-  /* Check the parameters */
-  s_assert_param(IS_CMAX_NB(cMaxNb));
-
-  /* Reads the CSMA_CONFIG0 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-
-  /* Build the value of max back off to be set */
-  tempRegValue &= 0xF8;
-  tempRegValue |= cMaxNb;
-
-  /* Writes the new value on the CSMA_CONFIG0 register */
-  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-}
-
-/**
- * @brief  Returns the max number of back-off.
- * @param  None.
- * @retval uint8_t Max number of back-off.
- */
-uint8_t SpiritCsmaGetMaxNumberBackoff(void)
-{
-  uint8_t tempRegValue;
-
-  /* Reads the CSMA_CONFIG0 register value */
-  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
-
-  /* Build and return the max number of back-off */
-  return (tempRegValue & 0x07);
-
-}
-
-
-/**
- *@}
- */
-
-/**
- *@}
- */
-
-
-/**
- *@}
- */
-
-
-
-/******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/
+/**
+  ******************************************************************************
+  * @file    SPIRIT_Csma.c
+  * @author  VMA division - AMS
+  * @version 3.2.2
+  * @date    08-July-2015
+  * @brief   Configuration and management of SPIRIT CSMA.
+  * @details
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "SPIRIT_Csma.h"
+#include "MCU_Interface.h"
+
+
+/**
+ * @addtogroup SPIRIT_Libraries
+ * @{
+ */
+
+
+/**
+ * @addtogroup SPIRIT_Csma
+ * @{
+ */
+
+
+/**
+ * @defgroup Csma_Private_TypesDefinitions      CSMA Private TypesDefinitions
+ * @{
+ */
+
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup Csma_Private_Defines               CSMA Private Defines
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup Csma_Private_Macros               CSMA Private Macros
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup Csma_Private_Variables             CSMA Private Variables
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+
+/**
+ * @defgroup Csma_Private_FunctionPrototypes    CSMA Private FunctionPrototypes
+ * @{
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ * @defgroup Csma_Private_Functions             CSMA Private Functions
+ * @{
+ */
+
+
+/**
+ * @brief  Initializes the SPIRIT CSMA according to the specified parameters in the CsmaInit.
+ * @param  pxCsmaInit Csma init structure.
+ *         This parameter is a pointer to @ref CsmaInit.
+ * @retval None.
+ */
+void SpiritCsmaInit(CsmaInit* pxCsmaInit)
+{
+  uint8_t tempRegValue[5];
+
+  /* Check the parameters */
+  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(pxCsmaInit->xCsmaPersistentMode));
+  s_assert_param(IS_CCA_PERIOD(pxCsmaInit->xMultiplierTbit));
+  s_assert_param(IS_CSMA_LENGTH(pxCsmaInit->xCcaLength));
+  s_assert_param(IS_BU_COUNTER_SEED(pxCsmaInit->nBuCounterSeed));
+  s_assert_param(IS_BU_PRESCALER(pxCsmaInit->cBuPrescaler));
+  s_assert_param(IS_CMAX_NB(pxCsmaInit->cMaxNb));
+
+  /* CSMA BU counter seed (MSB) config */
+  tempRegValue[0] = (uint8_t)(pxCsmaInit->nBuCounterSeed >> 8);
+
+  /* CSMA BU counter seed (LSB) config */
+  tempRegValue[1] = (uint8_t) pxCsmaInit->nBuCounterSeed;
+
+  /* CSMA BU prescaler config and CCA period config */
+  tempRegValue[2] = (pxCsmaInit->cBuPrescaler << 2) | pxCsmaInit->xMultiplierTbit;
+
+  /* CSMA CCA length config and max number of back-off */
+  tempRegValue[3] = (pxCsmaInit->xCcaLength | pxCsmaInit->cMaxNb);
+
+  /* Reads the PROTOCOL1_BASE register value, to write the SEED_RELOAD and CSMA_PERS_ON fields */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
+
+  /* Writes the new value for persistent mode */
+  if(pxCsmaInit->xCsmaPersistentMode==S_ENABLE)
+  {
+    tempRegValue[4] |= PROTOCOL1_CSMA_PERS_ON_MASK;
+  }
+  else
+  {
+    tempRegValue[4] &= ~PROTOCOL1_CSMA_PERS_ON_MASK;
+  }
+
+  /* Writes PROTOCOL1_BASE register */
+  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
+
+  /* Writes CSMA_CONFIGx_BASE registers */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG3_BASE, 4, tempRegValue);
+
+}
+
+
+ /**
+  * @brief  Returns the fitted structure CsmaInit starting from the registers values.
+  * @param  pxCsmaInit Csma structure to be fitted.
+  *         This parameter is a pointer to @ref CsmaInit.
+  * @retval None.
+  */
+void SpiritCsmaGetInfo(CsmaInit* pxCsmaInit)
+{
+   uint8_t tempRegValue[5];
+
+   /* Reads PROTOCOL1_BASE register */
+   g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue[4]);
+
+   /* Reads CSMA_CONFIGx_BASE registers */
+   g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG3_BASE, 4, tempRegValue);
+
+   /* Reads the bu counter seed */
+   pxCsmaInit->nBuCounterSeed = (uint16_t)tempRegValue[1] | ((uint16_t)(tempRegValue[0] << 8));
+
+   /* Reads the bu prescaler */
+   pxCsmaInit->cBuPrescaler = tempRegValue[2]>>2;
+
+   /* Reads the Cca period */
+   pxCsmaInit->xMultiplierTbit = (CcaPeriod)(tempRegValue[2] & 0x03);
+
+   /* Reads the Cca length */
+   pxCsmaInit->xCcaLength = (CsmaLength)(tempRegValue[3]&0xF0);
+
+   /* Reads the max number of back off */
+   pxCsmaInit->cMaxNb = tempRegValue[3] & 0x07;
+
+   /* Reads the persistent mode enable bit */
+   pxCsmaInit->xCsmaPersistentMode = (SpiritFunctionalState)((tempRegValue[4]>>1) & 0x01);
+
+}
+
+
+/**
+ * @brief  Enables or Disables the CSMA.
+ * @param  xNewState the state of the CSMA mode.
+ *         This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None.
+ */
+void SpiritCsma(SpiritFunctionalState xNewState)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Sets or resets the CSMA enable bit */
+  if(xNewState==S_ENABLE)
+  {
+    tempRegValue |= PROTOCOL1_CSMA_ON_MASK;
+  }
+  else
+  {
+    tempRegValue &= ~PROTOCOL1_CSMA_ON_MASK;
+  }
+
+  /* Writes the new value on the PROTOCOL1 register */
+  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+}
+
+/**
+ * @brief  Gets the CSMA mode. Says if it is enabled or disabled.
+ * @param  None.
+ * @retval SpiritFunctionalState: CSMA mode.
+ */
+SpiritFunctionalState SpiritCsmaGetCsma(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Return if set or reset */
+  if(tempRegValue & PROTOCOL1_CSMA_ON_MASK)
+  {
+    return S_ENABLE;
+  }
+  else
+  {
+    return S_DISABLE;
+  }
+
+}
+
+/**
+ * @brief  Enables or Disables the persistent CSMA mode.
+ * @param  xNewState the state of the persistent CSMA mode.
+ *         This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None.
+ */
+void SpiritCsmaPersistentMode(SpiritFunctionalState xNewState)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Enables/disables the CSMA persistent mode */
+  if(xNewState==S_ENABLE)
+  {
+    tempRegValue |= PROTOCOL1_CSMA_PERS_ON_MASK;
+  }
+  else
+  {
+    tempRegValue &= ~PROTOCOL1_CSMA_PERS_ON_MASK;
+  }
+
+  /* Writes the new vaue on the PROTOCOL1 register */
+  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Gets the persistent CSMA mode.
+ * @param  None.
+ * @retval SpiritFunctionalState: CSMA persistent mode.
+ */
+SpiritFunctionalState SpiritCsmaGetPersistentMode(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Return if set or reset */
+  if(tempRegValue & PROTOCOL1_CSMA_PERS_ON_MASK)
+  {
+    return S_ENABLE;
+  }
+  else
+  {
+    return S_DISABLE;
+  }
+
+}
+
+
+/**
+ * @brief  Enables or Disables the seed reload mode (if enabled it reloads the back-off generator seed using the value written in the BU_COUNTER_SEED register).
+ * @param  xNewState the state of the seed reload mode.
+ *	   This parameter can be: S_ENABLE or S_DISABLE.
+ * @retval None.
+ */
+void SpiritCsmaSeedReloadMode(SpiritFunctionalState xNewState)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_SPIRIT_FUNCTIONAL_STATE(xNewState));
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Enables/disables the seed reload mode */
+  if(xNewState==S_ENABLE)
+  {
+    tempRegValue |= PROTOCOL1_SEED_RELOAD_MASK;
+  }
+  else
+  {
+    tempRegValue &= ~PROTOCOL1_SEED_RELOAD_MASK;
+  }
+
+  /* Writes the new value on the PROTOCOL1 register */
+  g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Gets the seed reload mode.
+ * @param  None.
+ * @retval SpiritFunctionalState: CSMA seed reload mode.
+ */
+SpiritFunctionalState SpiritCsmaGetSeedReloadMode(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the PROTOCOL1 register value */
+  g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
+
+  /* Return if set or reset */
+  if(tempRegValue & PROTOCOL1_SEED_RELOAD_MASK)
+  {
+    return S_ENABLE;
+  }
+  else
+  {
+    return S_DISABLE;
+  }
+}
+
+
+/**
+ * @brief  Sets the BU counter seed (BU_COUNTER_SEED register). The CSMA back off time is given by the formula: BO = rand(2^NB)*BU.
+ * @param  nBuCounterSeed seed of the random number generator used to apply the BBE algorithm.
+ *	   This parameter is an uint16_t.
+ * @retval None.
+ */
+void SpiritCsmaSetBuCounterSeed(uint16_t nBuCounterSeed)
+{
+  uint8_t tempRegValue[2];
+
+  /* Check parameters */
+  s_assert_param(IS_BU_COUNTER_SEED(nBuCounterSeed));
+
+  /* Build value (MSB)*/
+  tempRegValue[0]=(uint8_t)(nBuCounterSeed>>8);
+  /* Build value (LSB) */
+  tempRegValue[1]=(uint8_t)nBuCounterSeed;
+
+  /* Writes the CSMA_CONFIG3 registers */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG3_BASE, 2, tempRegValue);
+
+}
+
+/**
+ * @brief  Returns the BU counter seed (BU_COUNTER_SEED register).
+ * @param  None.
+ * @retval uint16_t Seed of the random number generator used to apply the BBE algorithm.
+ */
+uint16_t SpiritCsmaGetBuCounterSeed(void)
+{
+  uint8_t tempRegValue[2];
+
+  /* Reads the CSMA_CONFIGx registers value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG3_BASE, 2, tempRegValue);
+
+  /* Build the counter seed and return it */
+  return ((uint16_t)tempRegValue[1] + (((uint16_t)tempRegValue[0])<<8));
+
+}
+
+
+/**
+ * @brief  Sets the BU prescaler. The CSMA back off time is given by the formula: BO = rand(2^NB)*BU.
+ * @param  cBuPrescaler used to program the back-off unit BU.
+ * 	   This parameter is an uint8_t.
+ * @retval None.
+ */
+void SpiritCsmaSetBuPrescaler(uint8_t cBuPrescaler)
+{
+  uint8_t tempRegValue;
+
+  /* Check parameters */
+  s_assert_param(IS_BU_PRESCALER(cBuPrescaler));
+
+  /* Reads the CSMA_CONFIG1 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+  /* Build the new value for the BU prescaler */
+  tempRegValue &= 0x03;
+  tempRegValue |= (cBuPrescaler<<2);
+
+  /* Writes the new value on the CSMA_CONFIG1_BASE register */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Returns the BU prescaler.
+ * @param  None.
+ * @retval uint8_t Value back-off unit (BU).
+ */
+uint8_t SpiritCsmaGetBuPrescaler(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the CSMA_CONFIG1 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+  /* Build and return the BU prescaler value */
+  return (tempRegValue >> 2);
+
+}
+
+
+/**
+ * @brief  Sets the CCA period.
+ * @param  xMultiplierTbit value of CCA period to store.
+ * 	   This parameter can be a value of @ref CcaPeriod.
+ * @retval None.
+ */
+void SpiritCsmaSetCcaPeriod(CcaPeriod xMultiplierTbit)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_CCA_PERIOD(xMultiplierTbit));
+
+  /* Reads the CSMA_CONFIG1 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+  /* Build the new value setting the the CCA period */
+  tempRegValue &= 0xFC;
+  tempRegValue |= xMultiplierTbit;
+
+  /* Writes the new value on the CSMA_CONFIG1 register */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Returns the CCA period.
+ * @param  None.
+ * @retval CcaPeriod CCA period.
+ */
+CcaPeriod SpiritCsmaGetCcaPeriod(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the CSMA_CONFIG1 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG1_BASE, 1, &tempRegValue);
+
+  /* Build and return the CCA period value */
+  return (CcaPeriod)(tempRegValue & 0x03);
+
+}
+
+
+/**
+ * @brief  Sets the CCA length.
+ * @param  xCcaLength the CCA length (a value between 1 and 15 that multiplies the CCA period).
+ *	   This parameter can be any value of @ref CsmaLength.
+ * @retval None.
+ */
+void SpiritCsmaSetCcaLength(CsmaLength xCcaLength)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_CSMA_LENGTH(xCcaLength));
+
+  /* Reads the CSMA_CONFIG0 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+
+  /* Build the value of CCA length to be set */
+  tempRegValue &= 0x0F;
+  tempRegValue |= xCcaLength;
+
+  /* Writes the new value on the CSMA_CONFIG0 register */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+
+}
+
+
+/**
+ * @brief  Returns the CCA length.
+ * @param  None.
+ * @retval uint8_t CCA length.
+ */
+uint8_t SpiritCsmaGetCcaLength(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the CSMA_CONFIG0 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+
+  /* Build and return the CCA length */
+  return tempRegValue >> 4;
+
+}
+
+
+/**
+ * @brief  Sets the max number of back-off. If reached Spirit stops the transmission.
+ * @param  cMaxNb the max number of back-off.
+ *         This parameter is an uint8_t.
+ * @retval None.
+ */
+void SpiritCsmaSetMaxNumberBackoff(uint8_t cMaxNb)
+{
+  uint8_t tempRegValue;
+
+  /* Check the parameters */
+  s_assert_param(IS_CMAX_NB(cMaxNb));
+
+  /* Reads the CSMA_CONFIG0 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+
+  /* Build the value of max back off to be set */
+  tempRegValue &= 0xF8;
+  tempRegValue |= cMaxNb;
+
+  /* Writes the new value on the CSMA_CONFIG0 register */
+  g_xStatus = SpiritSpiWriteRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+}
+
+/**
+ * @brief  Returns the max number of back-off.
+ * @param  None.
+ * @retval uint8_t Max number of back-off.
+ */
+uint8_t SpiritCsmaGetMaxNumberBackoff(void)
+{
+  uint8_t tempRegValue;
+
+  /* Reads the CSMA_CONFIG0 register value */
+  g_xStatus = SpiritSpiReadRegisters(CSMA_CONFIG0_BASE, 1, &tempRegValue);
+
+  /* Build and return the max number of back-off */
+  return (tempRegValue & 0x07);
+
+}
+
+
+/**
+ *@}
+ */
+
+/**
+ *@}
+ */
+
+
+/**
+ *@}
+ */
+
+
+
+/******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/