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oscilloscope/Libraries/STM32F10x_StdPeriph_Driver/src/stm32f10x_cec.c

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/**
******************************************************************************
* @file stm32f10x_cec.c
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief This file provides all the CEC firmware functions.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* 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 2011 STMicroelectronics *****END OF FILE****/
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