mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
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****/