Diff: targets/cmsis/TARGET_STM/TARGET_DISCO_F100RB/stm32f10x_cec.c

Revision:

126:549ba18ddd81

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_DISCO_F100RB/stm32f10x_cec.c	Wed Mar 19 16:00:09 2014 +0000
@@ -0,0 +1,448 @@
+/**
+  ******************************************************************************
+  * @file    stm32f10x_cec.c
+  * @author  MCD Application Team
+  * @version V3.6.1
+  * @date    05-March-2012
+  * @brief   This file provides all the CEC firmware functions.
+ *******************************************************************************
+ * Copyright (c) 2014, STMicroelectronics
+ * All rights reserved.
+ *
+ * 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 "stm32f10x_cec.h"
+#include "stm32f10x_rcc.h"
+
+/** @addtogroup STM32F10x_StdPeriph_Driver
+  * @{
+  */
+
+/** @defgroup CEC 
+  * @brief CEC driver modules
+  * @{
+  */
+
+/** @defgroup CEC_Private_TypesDefinitions
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+
+/** @defgroup CEC_Private_Defines
+  * @{
+  */ 
+
+/* ------------ CEC registers bit address in the alias region ----------- */
+#define CEC_OFFSET                (CEC_BASE - PERIPH_BASE)
+
+/* --- CFGR Register ---*/
+
+/* Alias word address of PE bit */
+#define CFGR_OFFSET                 (CEC_OFFSET + 0x00)
+#define PE_BitNumber                0x00
+#define CFGR_PE_BB                  (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (PE_BitNumber * 4))
+
+/* Alias word address of IE bit */
+#define IE_BitNumber                0x01
+#define CFGR_IE_BB                  (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (IE_BitNumber * 4))
+
+/* --- CSR Register ---*/
+
+/* Alias word address of TSOM bit */
+#define CSR_OFFSET                  (CEC_OFFSET + 0x10)
+#define TSOM_BitNumber              0x00
+#define CSR_TSOM_BB                 (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TSOM_BitNumber * 4))
+
+/* Alias word address of TEOM bit */
+#define TEOM_BitNumber              0x01
+#define CSR_TEOM_BB                 (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (TEOM_BitNumber * 4))
+  
+#define CFGR_CLEAR_Mask            (uint8_t)(0xF3)        /* CFGR register Mask */
+#define FLAG_Mask                  ((uint32_t)0x00FFFFFF) /* CEC FLAG mask */
+ 
+/**
+  * @}
+  */ 
+
+
+/** @defgroup CEC_Private_Macros
+  * @{
+  */ 
+
+/**
+  * @}
+  */ 
+
+
+/** @defgroup CEC_Private_Variables
+  * @{
+  */ 
+
+/**
+  * @}
+  */ 
+
+
+/** @defgroup CEC_Private_FunctionPrototypes
+  * @{
+  */
+ 
+/**
+  * @}
+  */ 
+
+
+/** @defgroup CEC_Private_Functions
+  * @{
+  */ 
+
+/**
+  * @brief  Deinitializes the CEC peripheral registers to their default reset 
+  *         values.
+  * @param  None
+  * @retval None
+  */
+void CEC_DeInit(void)
+{
+  /* Enable CEC reset state */
+  RCC_APB1PeriphResetCmd(RCC_APB1Periph_CEC, ENABLE);  
+  /* Release CEC from reset state */
+  RCC_APB1PeriphResetCmd(RCC_APB1Periph_CEC, DISABLE); 
+}
+
+
+/**
+  * @brief  Initializes the CEC peripheral according to the specified 
+  *         parameters in the CEC_InitStruct.
+  * @param  CEC_InitStruct: pointer to an CEC_InitTypeDef structure that
+  *         contains the configuration information for the specified
+  *         CEC peripheral.
+  * @retval None
+  */
+void CEC_Init(CEC_InitTypeDef* CEC_InitStruct)
+{
+  uint16_t tmpreg = 0;
+ 
+  /* Check the parameters */
+  assert_param(IS_CEC_BIT_TIMING_ERROR_MODE(CEC_InitStruct->CEC_BitTimingMode)); 
+  assert_param(IS_CEC_BIT_PERIOD_ERROR_MODE(CEC_InitStruct->CEC_BitPeriodMode));
+     
+  /*---------------------------- CEC CFGR Configuration -----------------*/
+  /* Get the CEC CFGR value */
+  tmpreg = CEC->CFGR;
+  
+  /* Clear BTEM and BPEM bits */
+  tmpreg &= CFGR_CLEAR_Mask;
+  
+  /* Configure CEC: Bit Timing Error and Bit Period Error */
+  tmpreg |= (uint16_t)(CEC_InitStruct->CEC_BitTimingMode | CEC_InitStruct->CEC_BitPeriodMode);
+
+  /* Write to CEC CFGR  register*/
+  CEC->CFGR = tmpreg;
+  
+}
+
+/**
+  * @brief  Enables or disables the specified CEC peripheral.
+  * @param  NewState: new state of the CEC peripheral. 
+  *     This parameter can be: ENABLE or DISABLE.
+  * @retval None
+  */
+void CEC_Cmd(FunctionalState NewState)
+{
+  /* Check the parameters */
+  assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+  *(__IO uint32_t *) CFGR_PE_BB = (uint32_t)NewState;
+
+  if(NewState == DISABLE)
+  {
+    /* Wait until the PE bit is cleared by hardware (Idle Line detected) */
+    while((CEC->CFGR & CEC_CFGR_PE) != (uint32_t)RESET)
+    {
+    }  
+  }  
+}
+
+/**
+  * @brief  Enables or disables the CEC interrupt.
+  * @param  NewState: new state of the CEC interrupt.
+  *   This parameter can be: ENABLE or DISABLE.
+  * @retval None
+  */
+void CEC_ITConfig(FunctionalState NewState)
+{
+  /* Check the parameters */
+  assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+  *(__IO uint32_t *) CFGR_IE_BB = (uint32_t)NewState;
+}
+
+/**
+  * @brief  Defines the Own Address of the CEC device.
+  * @param  CEC_OwnAddress: The CEC own address
+  * @retval None
+  */
+void CEC_OwnAddressConfig(uint8_t CEC_OwnAddress)
+{
+  /* Check the parameters */
+  assert_param(IS_CEC_ADDRESS(CEC_OwnAddress));
+
+  /* Set the CEC own address */
+  CEC->OAR = CEC_OwnAddress;
+}
+
+/**
+  * @brief  Sets the CEC prescaler value.
+  * @param  CEC_Prescaler: CEC prescaler new value
+  * @retval None
+  */
+void CEC_SetPrescaler(uint16_t CEC_Prescaler)
+{
+  /* Check the parameters */
+  assert_param(IS_CEC_PRESCALER(CEC_Prescaler));
+
+  /* Set the  Prescaler value*/
+  CEC->PRES = CEC_Prescaler;
+}
+
+/**
+  * @brief  Transmits single data through the CEC peripheral.
+  * @param  Data: the data to transmit.
+  * @retval None
+  */
+void CEC_SendDataByte(uint8_t Data)
+{  
+  /* Transmit Data */
+  CEC->TXD = Data ;
+}
+
+
+/**
+  * @brief  Returns the most recent received data by the CEC peripheral.
+  * @param  None
+  * @retval The received data.
+  */
+uint8_t CEC_ReceiveDataByte(void)
+{
+  /* Receive Data */
+  return (uint8_t)(CEC->RXD);
+}
+
+/**
+  * @brief  Starts a new message.
+  * @param  None
+  * @retval None
+  */
+void CEC_StartOfMessage(void)
+{  
+  /* Starts of new message */
+  *(__IO uint32_t *) CSR_TSOM_BB = (uint32_t)0x1;
+}
+
+/**
+  * @brief  Transmits message with or without an EOM bit.
+  * @param  NewState: new state of the CEC Tx End Of Message. 
+  *     This parameter can be: ENABLE or DISABLE.
+  * @retval None
+  */
+void CEC_EndOfMessageCmd(FunctionalState NewState)
+{   
+  /* Check the parameters */
+  assert_param(IS_FUNCTIONAL_STATE(NewState));
+  
+  /* The data byte will be transmitted with or without an EOM bit*/
+  *(__IO uint32_t *) CSR_TEOM_BB = (uint32_t)NewState;
+}
+
+/**
+  * @brief  Gets the CEC flag status
+  * @param  CEC_FLAG: specifies the CEC flag to check. 
+  *   This parameter can be one of the following values:
+  *     @arg CEC_FLAG_BTE: Bit Timing Error
+  *     @arg CEC_FLAG_BPE: Bit Period Error
+  *     @arg CEC_FLAG_RBTFE: Rx Block Transfer Finished Error
+  *     @arg CEC_FLAG_SBE: Start Bit Error
+  *     @arg CEC_FLAG_ACKE: Block Acknowledge Error
+  *     @arg CEC_FLAG_LINE: Line Error
+  *     @arg CEC_FLAG_TBTFE: Tx Block Transfer Finished Error
+  *     @arg CEC_FLAG_TEOM: Tx End Of Message 
+  *     @arg CEC_FLAG_TERR: Tx Error
+  *     @arg CEC_FLAG_TBTRF: Tx Byte Transfer Request or Block Transfer Finished
+  *     @arg CEC_FLAG_RSOM: Rx Start Of Message
+  *     @arg CEC_FLAG_REOM: Rx End Of Message
+  *     @arg CEC_FLAG_RERR: Rx Error
+  *     @arg CEC_FLAG_RBTF: Rx Byte/Block Transfer Finished
+  * @retval The new state of CEC_FLAG (SET or RESET)
+  */
+FlagStatus CEC_GetFlagStatus(uint32_t CEC_FLAG) 
+{
+  FlagStatus bitstatus = RESET;
+  uint32_t cecreg = 0, cecbase = 0;
+  
+  /* Check the parameters */
+  assert_param(IS_CEC_GET_FLAG(CEC_FLAG));
+ 
+  /* Get the CEC peripheral base address */
+  cecbase = (uint32_t)(CEC_BASE);
+  
+  /* Read flag register index */
+  cecreg = CEC_FLAG >> 28;
+  
+  /* Get bit[23:0] of the flag */
+  CEC_FLAG &= FLAG_Mask;
+  
+  if(cecreg != 0)
+  {
+    /* Flag in CEC ESR Register */
+    CEC_FLAG = (uint32_t)(CEC_FLAG >> 16);
+    
+    /* Get the CEC ESR register address */
+    cecbase += 0xC;
+  }
+  else
+  {
+    /* Get the CEC CSR register address */
+    cecbase += 0x10;
+  }
+  
+  if(((*(__IO uint32_t *)cecbase) & CEC_FLAG) != (uint32_t)RESET)
+  {
+    /* CEC_FLAG is set */
+    bitstatus = SET;
+  }
+  else
+  {
+    /* CEC_FLAG is reset */
+    bitstatus = RESET;
+  }
+  
+  /* Return the CEC_FLAG status */
+  return  bitstatus;
+}
+
+/**
+  * @brief  Clears the CEC's pending flags.
+  * @param  CEC_FLAG: specifies the flag to clear. 
+  *   This parameter can be any combination of the following values:
+  *     @arg CEC_FLAG_TERR: Tx Error
+  *     @arg CEC_FLAG_TBTRF: Tx Byte Transfer Request or Block Transfer Finished
+  *     @arg CEC_FLAG_RSOM: Rx Start Of Message
+  *     @arg CEC_FLAG_REOM: Rx End Of Message
+  *     @arg CEC_FLAG_RERR: Rx Error
+  *     @arg CEC_FLAG_RBTF: Rx Byte/Block Transfer Finished
+  * @retval None
+  */
+void CEC_ClearFlag(uint32_t CEC_FLAG)
+{ 
+  uint32_t tmp = 0x0;
+  
+  /* Check the parameters */
+  assert_param(IS_CEC_CLEAR_FLAG(CEC_FLAG));
+
+  tmp = CEC->CSR & 0x2;
+       
+  /* Clear the selected CEC flags */
+  CEC->CSR &= (uint32_t)(((~(uint32_t)CEC_FLAG) & 0xFFFFFFFC) | tmp);
+}
+
+/**
+  * @brief  Checks whether the specified CEC interrupt has occurred or not.
+  * @param  CEC_IT: specifies the CEC interrupt source to check. 
+  *   This parameter can be one of the following values:
+  *     @arg CEC_IT_TERR: Tx Error
+  *     @arg CEC_IT_TBTF: Tx Block Transfer Finished
+  *     @arg CEC_IT_RERR: Rx Error
+  *     @arg CEC_IT_RBTF: Rx Block Transfer Finished
+  * @retval The new state of CEC_IT (SET or RESET).
+  */
+ITStatus CEC_GetITStatus(uint8_t CEC_IT)
+{
+  ITStatus bitstatus = RESET;
+  uint32_t enablestatus = 0;
+  
+  /* Check the parameters */
+   assert_param(IS_CEC_GET_IT(CEC_IT));
+   
+  /* Get the CEC IT enable bit status */
+  enablestatus = (CEC->CFGR & (uint8_t)CEC_CFGR_IE) ;
+  
+  /* Check the status of the specified CEC interrupt */
+  if (((CEC->CSR & CEC_IT) != (uint32_t)RESET) && enablestatus)
+  {
+    /* CEC_IT is set */
+    bitstatus = SET;
+  }
+  else
+  {
+    /* CEC_IT is reset */
+    bitstatus = RESET;
+  }
+  /* Return the CEC_IT status */
+  return  bitstatus;
+}
+
+/**
+  * @brief  Clears the CEC's interrupt pending bits.
+  * @param  CEC_IT: specifies the CEC interrupt pending bit to clear.
+  *   This parameter can be any combination of the following values:
+  *     @arg CEC_IT_TERR: Tx Error
+  *     @arg CEC_IT_TBTF: Tx Block Transfer Finished
+  *     @arg CEC_IT_RERR: Rx Error
+  *     @arg CEC_IT_RBTF: Rx Block Transfer Finished
+  * @retval None
+  */
+void CEC_ClearITPendingBit(uint16_t CEC_IT)
+{
+  uint32_t tmp = 0x0;
+  
+  /* Check the parameters */
+  assert_param(IS_CEC_GET_IT(CEC_IT));
+  
+  tmp = CEC->CSR & 0x2;
+  
+  /* Clear the selected CEC interrupt pending bits */
+  CEC->CSR &= (uint32_t)(((~(uint32_t)CEC_IT) & 0xFFFFFFFC) | tmp);
+}
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/