/STM32F0xx_StdPeriph_Lib_V1.0.0/Utilities/STM32_EVAL/STM320518_EVAL/stm320518_eval_cec.c
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- /**
- ******************************************************************************
- * @file stm320518_eval_cec.c
- * @author MCD Application Team
- * @version V1.0.0
- * @date 20-April-2012
- * @brief This file provides all the STM320518-EVAL HDMI-CEC firmware functions.
- *
- * ===================================================================
- * Notes:
- * - This driver runs only on the STM320518-EVAL RevB
- * ===================================================================
- *
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2>
- *
- * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
- * You may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.st.com/software_license_agreement_liberty_v2
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- ******************************************************************************
- */
-
- /* Includes ------------------------------------------------------------------*/
- #include "stm320518_eval_cec.h"
-
- /** @addtogroup Utilities
- * @{
- */
-
- /** @addtogroup STM32_EVAL
- * @{
- */
-
- /** @addtogroup STM320518_EVAL
- * @{
- */
-
- /** @defgroup STM320518_EVAL_CEC
- * @brief This file includes the CEC Stack driver for HDMI-CEC Module
- * of STM320518-EVAL board.
- * @{
- */
-
- /** @defgroup STM320518_EVAL_CEC_Private_Types
- * @{
- */
-
- /**
- * @}
- */
-
- /** @defgroup STM320518_EVAL_CEC_Private_Defines
- * @{
- */
- /* Uncomment the define to use the LSE as a source clock */
- /* #define LSE_SOURCE_CLK */
-
- /**
- * @}
- */
-
- /** @defgroup STM320518_EVAL_CEC_Private_Macros
- * @{
- */
- /**
- * @}
- */
-
- /** @defgroup STM320518_EVAL_CEC_Private_Variables
- * @{
- */
- __IO uint32_t ReceivedFrame = 0;
- __IO uint32_t SendFrame = 0;
- uint32_t BufferCount = 0, TxCounter = 0, RxCounter = 0;
- __IO uint8_t BufferPointer[15];
- __IO uint32_t ReceiveStatus = 0;
- __IO uint32_t SendStatus = 0;
- __IO uint8_t TransErrorCode = 0;
- uint8_t MyLogicalAddress = 0;
- uint16_t MyPhysicalAddress = 0;
- __IO uint8_t DeviceType = 0;
- #ifdef HDMI_CEC_USE_DDC
- uint8_t pBuffer[256];
- __IO uint16_t NumByteToRead = 255;
- #endif
-
- __IO uint8_t CECDevicesNumber = 0;
- HDMI_CEC_Message HDMI_CEC_TX_MessageStructPrivate;
- HDMI_CEC_Message HDMI_CEC_RX_MessageStructPrivate;
- HDMI_CEC_Message HDMI_CEC_TX_MessageStructure;
-
- __IO uint8_t FeatureOpcode = 0;
- __IO uint8_t AbortReason = 0;
- __IO uint8_t DeviceCount = 0;
-
- HDMI_CEC_Map HDMI_CEC_MapStruct;
- HDMI_CEC_Map HDMI_CEC_DeviceMap[14];
-
- /* CEC follower addresses */
- uint8_t* HDMI_CEC_Follower_String[13][2] =
- {
- {(uint8_t *)" TV ", (uint8_t *)"0"},
- {(uint8_t *)" Recording Device 1 ", (uint8_t *)"0"},
- {(uint8_t *)" Recording Device 2 ", (uint8_t *)"0"},
- {(uint8_t *)" Tuner 1 ", (uint8_t *)"0"},
- {(uint8_t *)" Playback Device 1 ", (uint8_t *)"0"},
- {(uint8_t *)" Audio System ", (uint8_t *)"0"},
- {(uint8_t *)" Tuner 2 ", (uint8_t *)"0"},
- {(uint8_t *)" Tuner 3 ", (uint8_t *)"0"},
- {(uint8_t *)" Playback Device 2 ", (uint8_t *)"0"},
- {(uint8_t *)" Recording Device 3 ", (uint8_t *)"0"},
- {(uint8_t *)" Tuner 4 ", (uint8_t *)"0"},
- {(uint8_t *)" Playback Device 3 ", (uint8_t *)"0"},
- {(uint8_t *)" Broadcast ", (uint8_t *)"1"}
- };
-
- /* EDID & CEA861 Extension */
- const uint8_t EDID_Structure[256] =
- {
- /*-------------------------- Block0: 128Bytes ------------------------------*/
- /* Header */
- 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
- /* Vendor & Product Identification */
- 0x4C, 0x2D, 0x57, 0x03, 0x00, 0x00, 0x00, 0x00, 0x22, 0x11,
- /* EDID Structure Version & Revision */
- 0x01, 0x03,
- /* Basic Display Parameters & Features */
- 0x80, 0x10, 0x09, 0x78, 0x0A,
- /* Color Characteristics */
- 0x1D, 0xED, 0xA7, 0x53, 0x34, 0xAC, 0x25, 0x12, 0x47, 0x4A,
- /* Established Timings */
- 0x20, 0x00, 0x00,
- /* Standard Timings */
- 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
- 0x01, 0x01, 0x01,
- /* Byte Data Blocks*/
- 0x02, 0x3A, 0x80, 0x18, 0x71, 0x38, 0x2D, 0x40, 0x58, 0x2C, 0x45, 0x00, 0xA0,
- 0x5A, 0x00, 0x00, 0x00, 0x1E, 0x01, 0x1D, 0x00, 0x72, 0x51, 0xD0, 0x1E, 0x20,
- 0x6E, 0x28, 0x55, 0x00, 0xA0, 0x5A, 0x00, 0x00, 0x00, 0x1E, 0x00, 0x00, 0x00,
- 0xFD, 0x00, 0x17, 0x3D, 0x1A, 0x44, 0x17, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x00, 0x00, 0x00, 0xFC, 0x00, 0x53, 0x41, 0x4D, 0x53, 0x55, 0x4E,
- 0x47, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
- /* Extension Block Count */
- 0x01,
- /* Checksum C */
- 0xF3,
- /* ------------------------ Block1: 128Bytes------------------------------- */
- /* Refer to CEA 861 Standard for definitions */
- /* CEA 861 EXTENSION Block Version 3 */
- 0x02, 0x03,
- /* Byte number within this block where the 18-byte DTDs begin */
- 0x21,
- /* Number of DTDs present */
- 0x00,
- /* Start of Data Block Collection */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- /* IEEE Registration Identifier */
- 0x03, 0x0C, 0x00,
- /* Vendor Specific Data: Physical Address */
- 0x10, 0x00,
- /* Byte Data Blocks */
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00
- };
-
- /**
- * @}
- */
-
-
- /** @defgroup STM320518_EVAL_CEC_Private_Function_Prototypes
- * @{
- */
- static HDMI_CEC_Error SinkPhysicalAddressDiscovery(void);
- static HDMI_CEC_Error SourcePhysicalAddressDiscovery(void);
- static HDMI_CEC_Error LogicalAddressAllocation(void);
-
-
- /**
- * @}
- */
-
-
- /** @defgroup STM320518_EVAL_CEC_Private_Functions
- * @{
- */
-
- /**
- * @brief Initializes the HDMI CEC.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code
- */
- HDMI_CEC_Error HDMI_CEC_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- CEC_InitTypeDef CEC_InitStructure;
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- uint8_t sendcount = 0;
- uint32_t idx = 0;
-
- #ifdef LSE_SOURCE_CLK
- /* LSE */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
- PWR_BackupAccessCmd(ENABLE);
-
- RCC_LSEConfig(RCC_LSE_ON);
- while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
- {}
-
- RCC_CECCLKConfig(RCC_CECCLK_LSE);
- #endif
-
- for(idx=0; idx<12; idx++)
- {
- HDMI_CEC_Follower_String[idx][1] = (uint8_t *)"0";
- }
-
- /* Enable CEC and PWR clocks */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_CEC | RCC_APB1Periph_PWR, ENABLE);
-
- /* Enable CEC_LINE_GPIO clocks */
- RCC_AHBPeriphClockCmd(HDMI_CEC_LINE_GPIO_CLK, ENABLE);
-
- /* Configure CEC_LINE_GPIO as Output open drain */
- GPIO_InitStructure.GPIO_Pin = HDMI_CEC_LINE_PIN;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
- GPIO_Init(HDMI_CEC_LINE_GPIO_PORT, &GPIO_InitStructure);
-
- GPIO_PinAFConfig(HDMI_CEC_LINE_GPIO_PORT, GPIO_PinSource10, GPIO_AF_0);
-
- /* CEC DeInit */
- CEC_DeInit();
-
- /* Configure CEC */
- CEC_InitStructure.CEC_SignalFreeTime = CEC_SignalFreeTime_Standard;
- CEC_InitStructure.CEC_RxTolerance = CEC_RxTolerance_Standard;
- CEC_InitStructure.CEC_StopReception = CEC_StopReception_Off;
- CEC_InitStructure.CEC_BitRisingError = CEC_BitRisingError_Off;
- CEC_InitStructure.CEC_LongBitPeriodError = CEC_LongBitPeriodError_Off;
- CEC_InitStructure.CEC_BRDNoGen = CEC_BRDNoGen_Off;
- CEC_InitStructure.CEC_SFTOption = CEC_SFTOption_Off;
- CEC_Init(&CEC_InitStructure);
-
- /* Disable Listen Mode */
- CEC_ListenModeCmd(DISABLE);
-
- /* Enable CEC */
- CEC_Cmd(ENABLE);
-
- if (HDMI_CEC_ROOT == 0x1)
- {
- /* Logical Address Allocation */
- sendcount = 0;
- errorstatus = LogicalAddressAllocation();
-
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = LogicalAddressAllocation();
- }
-
- if (errorstatus != HDMI_CEC_OK)
- {
- /* Device Unregistered */
- return(errorstatus);
- }
-
- HDMI_CEC_CheckConnectedDevices();
-
- /* Set the CEC initiator address */
- CEC_OwnAddressConfig(MyLogicalAddress);
-
- /* Sink Physical Address discovery */
- errorstatus = SinkPhysicalAddressDiscovery();
-
- if (errorstatus != HDMI_CEC_OK)
- {
- /* Device not connected (Physical Address lost) */
- return(errorstatus);
- }
- }
- else
- {
- /* Source Physical Address discovery */
- errorstatus = SourcePhysicalAddressDiscovery();
-
- if (errorstatus != HDMI_CEC_OK)
- {
- /* Device not connected (Physical Address lost) */
- return(errorstatus);
- }
-
- /* Logical Address Allocation */
- sendcount = 0;
- errorstatus = LogicalAddressAllocation();
-
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = LogicalAddressAllocation();
- }
-
- if (errorstatus != HDMI_CEC_OK)
- {
- /* Device Unregistered */
- return(errorstatus);
- }
-
- HDMI_CEC_CheckConnectedDevices();
-
- /* Set the CEC initiator address */
- CEC_OwnAddressConfig(MyLogicalAddress);
- }
-
- /* Activate CEC interrupts associated to the set of TX flags */
- CEC_ITConfig(CEC_IT_TXEND|CEC_IT_TXBR,ENABLE);
-
- /* Activate CEC interrupts associated to the set of RX flags */
- CEC_ITConfig(CEC_IT_RXEND|CEC_IT_RXBR,ENABLE);
-
- /* Activate CEC interrupts associated to the set of TX error */
- CEC_ITConfig(CEC_IT_TXACKE|CEC_IT_TXERR|CEC_IT_TXUDR|CEC_IT_ARBLST,ENABLE);
-
- /* Activate CEC interrupts associated to the set of RX error */
- CEC_ITConfig(CEC_IT_RXACKE|CEC_IT_LBPE|CEC_IT_SBPE|CEC_IT_BRE|CEC_IT_RXOVR,ENABLE);
-
- /* Report physical address */
- errorstatus = HDMI_CEC_ReportPhysicalAddress();
- sendcount = 0;
- RxCounter = 0;
-
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = HDMI_CEC_ReportPhysicalAddress();
- }
-
- if (errorstatus != HDMI_CEC_OK)
- {
- /* Device Unregistred */
- return(errorstatus);
- }
- return errorstatus;
- }
-
- /**
- * @brief Transmit message by taking data from typedef struct CEC_Meassage
- * @param CEC_TX_MessageStructure: pointer to an CEC_Message structure that contains
- * the message to be sent.
- * @retval HDMI_CEC_Error: CEC Error code
- */
- HDMI_CEC_Error HDMI_CEC_TransmitMessage(HDMI_CEC_Message *HDMI_CEC_TX_MessageStructure)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- __IO uint32_t count = 0, j = 0;
-
- SendFrame = 0;
- SendStatus = 0;
- TxCounter = 0;
- BufferCount = 0;
-
- HDMI_CEC_TX_MessageStructPrivate = *HDMI_CEC_TX_MessageStructure;
-
- /* Initialize BufferPointer */
- for (j = 0; j < 15; j++)
- {
- BufferPointer[j] = 0;
- }
-
- BufferPointer[0] = HDMI_CEC_TX_MessageStructPrivate.Opcode;
-
- for (BufferCount = 1; BufferCount < HDMI_CEC_TX_MessageStructPrivate.TxMessageLength + 1; BufferCount++)
- {
- BufferPointer[BufferCount] = HDMI_CEC_TX_MessageStructPrivate.Operande[BufferCount - 1];
- }
-
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /* Write single Data in the TX Buffer to Transmit through the CEC peripheral */
- CEC_SendData(HDMI_CEC_TX_MessageStructPrivate.Header);
-
- /* Initiate Message Transmission */
- CEC_StartOfMessage();
-
- while ((SendFrame == 0) && (count < HDMI_CEC_TIMEOUT_VALUE))
- {
- count++;
- }
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (SendStatus == 0)
- {
- errorstatus = (HDMI_CEC_Error) TransErrorCode;
- }
- return errorstatus;
- }
-
- /**
- * @brief Get the ISR register status.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code
- */
- HDMI_CEC_Error HDMI_CEC_GetErrorStatus (void)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
-
- /* RX Overrun error case*/
- if (CEC_GetFlagStatus(CEC_FLAG_RXOVR) != RESET)
- {
- errorstatus = HDMI_CEC_RX_OVERRUN;
- CEC_ClearFlag(CEC_FLAG_RXOVR);
- }
- /* Bit Rising error case */
- if (CEC_GetFlagStatus(CEC_FLAG_BRE) != RESET)
- {
- errorstatus = HDMI_CEC_RX_BIT_RISING;
- CEC_ClearFlag(CEC_FLAG_BRE);
- }
- /* Short Bit Period error case */
- if (CEC_GetFlagStatus(CEC_FLAG_SBPE) != RESET)
- {
- errorstatus = HDMI_CEC_RX_SHORT_BIT_PERIOD;
- CEC_ClearFlag(CEC_FLAG_SBPE);
- }
- /* Long Bit Period error case */
- if (CEC_GetFlagStatus(CEC_FLAG_LBPE) != RESET)
- {
- errorstatus = HDMI_CEC_RX_LONG_BIT_PERIOD;
- CEC_ClearFlag(CEC_FLAG_LBPE);
- }
- /* RX Acknowledge error case */
- if (CEC_GetFlagStatus(CEC_FLAG_RXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_RX_ACKNOWLEDGE;
- CEC_ClearFlag(CEC_FLAG_RXACKE);
- }
- /* Arbitration Lost error case */
- if (CEC_GetFlagStatus(CEC_FLAG_ARBLST) != RESET)
- {
- errorstatus = HDMI_CEC_ARBITRATION_LOST;
- CEC_ClearFlag(CEC_FLAG_ARBLST);
- }
- /* TX underrun error case */
- if (CEC_GetFlagStatus(CEC_FLAG_TXUDR) != RESET)
- {
- errorstatus = HDMI_CEC_TX_UNDERRUN;
- CEC_ClearFlag(CEC_FLAG_TXUDR);
- }
- /* TX error case */
- if (CEC_GetFlagStatus(CEC_FLAG_TXERR) != RESET)
- {
- errorstatus = HDMI_CEC_TX_ERROR;
- CEC_ClearFlag(CEC_FLAG_TXERR);
- }
- /* TX Acknowledge error case */
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_TX_ACKNOWLEDGE;
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- }
- return errorstatus;
- }
-
- /**
- * @brief Allows to process all the interrupts that are high.
- * @param None
- * @retval None
- */
- void HDMI_CEC_ProcessIRQSrc(void)
- {
- /********************** Reception *******************************************/
- /* Check if a reception error occured */
- if (CEC->ISR & (CEC_IT_RXACKE | CEC_IT_LBPE | CEC_IT_SBPE | CEC_IT_BRE | CEC_IT_RXOVR))
- {
- /* Set receive status bit (Error) */
- ReceiveStatus = 0;
- ReceivedFrame = 1;
- CEC->ISR = (CEC_IT_RXACKE | CEC_IT_LBPE | CEC_IT_SBPE | CEC_IT_BRE | CEC_IT_RXOVR);
- RxCounter = 0;
- }
-
- if (CEC_GetITStatus(CEC_IT_RXBR))
- {
- /* Check if the byte received is a Header */
- if (RxCounter == 0)
- {
- HDMI_CEC_RX_MessageStructPrivate.Header = CEC_ReceiveData();
- RxCounter ++;
- }
- else if(RxCounter == 1) /* Receive opcode in the reception buffer */
- {
- HDMI_CEC_RX_MessageStructPrivate.Opcode = CEC_ReceiveData();
- RxCounter++;
- }
- else /* Receive each byte except header and opcode in the reception buffer */
- {
- HDMI_CEC_RX_MessageStructPrivate.Operande[RxCounter-2] = CEC_ReceiveData();
- RxCounter++;
- }
- CEC_ClearITPendingBit(CEC_IT_RXBR);
- }
-
- /* Check if the byte received is the last one of the message */
- if (CEC_GetITStatus(CEC_IT_RXEND))
- {
- if (RxCounter == 1)
- {
-
- HDMI_CEC_RX_MessageStructPrivate.RxMessageLength = RxCounter-1;
- }
- else
- {
- HDMI_CEC_RX_MessageStructPrivate.RxMessageLength = RxCounter-2;
- ReceivedFrame = 1;
- }
-
- /* Set the receive status */
- ReceiveStatus = SUCCESS;
- RxCounter = 0;
-
- /* Clear all reception flags */
- CEC_ClearITPendingBit(CEC_IT_RXEND);
- }
-
- /********************** Transmission ****************************************/
- /* Check if a transmission error occurred */
- if (CEC->ISR & (CEC_IT_TXACKE | CEC_IT_TXERR | CEC_IT_TXUDR | CEC_IT_ARBLST))
- {
- TransErrorCode = HDMI_CEC_GetErrorStatus();
- CEC->ISR = (CEC_IT_TXACKE | CEC_IT_TXERR | CEC_IT_TXUDR | CEC_IT_ARBLST);
- SendFrame = 1;
- SendStatus = 0;
- TxCounter = 0;
- }
-
- /* Check if end of message bit is set in the data to be transmitted */
- if (CEC_GetITStatus(CEC_IT_TXEND))
- {
- CEC_ClearITPendingBit(CEC_IT_TXEND | CEC_IT_TXBR);
- SendFrame = 1;
- SendStatus = SUCCESS;
- }
- /* Check if data byte has been sent */
- else if (CEC_GetITStatus(CEC_IT_TXBR))
- {
- /* Set EOM bit if the byte to be transmitted is the last one of the Transmit Buffer */
- if (TxCounter == (HDMI_CEC_TX_MessageStructPrivate.TxMessageLength))
- {
- CEC_EndOfMessage();
- CEC_SendData(BufferPointer[TxCounter++]);
- }
- else
- {
- /* Put the byte in the TX Buffer */
- CEC_SendData(BufferPointer[TxCounter++]);
- }
- CEC_ClearITPendingBit(CEC_IT_TXBR);
- }
- }
-
- /**
- * @brief Report physical address to all other devices thus allowing any
- device to create a map of the network.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code.
- */
- HDMI_CEC_Error HDMI_CEC_ReportPhysicalAddress(void)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- HDMI_CEC_Message HDMI_CEC_TX_Message;
-
- HDMI_CEC_TX_Message.Header = ((MyLogicalAddress << 4) | 0xF);
- HDMI_CEC_TX_Message.Opcode = HDMI_CEC_OPCODE_REPORT_PHYSICAL_ADDRESS;
- HDMI_CEC_TX_Message.Operande[0] = MyPhysicalAddress >> 8;
- HDMI_CEC_TX_Message.Operande[1] = MyPhysicalAddress & 0xFF;
- HDMI_CEC_TX_Message.Operande[2] = DeviceType;
- HDMI_CEC_TX_Message.TxMessageLength = 0x03;
-
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_Message);
-
- return errorstatus;
- }
-
- /**
- * @brief Handle CEC command receive callback.
- * @note When receiving the STANDBY Opcode command, the system is entered in
- * Stop mode and when wakeup, the PLL is configured as system clock and
- * the HSI is selected as PLL source.
- * @param None
- * @retval None
- */
- void HDMI_CEC_CommandCallBack(void)
- {
- uint8_t i = 0, sendcount = 0;
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- ErrorStatus HSEStartUpStatus;
-
- switch (HDMI_CEC_RX_MessageStructPrivate.Opcode)
- {
- case HDMI_CEC_OPCODE_REPORT_PHYSICAL_ADDRESS:
- HDMI_CEC_MapStruct.PhysicalAddress_A = HDMI_CEC_RX_MessageStructPrivate.Operande[1] >> 4;
- HDMI_CEC_MapStruct.PhysicalAddress_B = HDMI_CEC_RX_MessageStructPrivate.Operande[1] & 0x0F;
- HDMI_CEC_MapStruct.PhysicalAddress_C = HDMI_CEC_RX_MessageStructPrivate.Operande[0] >> 4;
- HDMI_CEC_MapStruct.PhysicalAddress_D = HDMI_CEC_RX_MessageStructPrivate.Operande[0] & 0x0F;
- HDMI_CEC_MapStruct.LogicalAddress = (HDMI_CEC_RX_MessageStructPrivate.Header >> 0x4) & 0x0F;
- HDMI_CEC_MapStruct.DeviceType = HDMI_CEC_RX_MessageStructPrivate.Operande[2];
- HDMI_CEC_DeviceMap[DeviceCount] = HDMI_CEC_MapStruct;
- HDMI_CEC_Follower_String[(HDMI_CEC_DeviceMap[DeviceCount].LogicalAddress)][1] = (uint8_t *)"1";
- DeviceCount++;
- break;
-
- case HDMI_CEC_OPCODE_STANDBY:
-
- /* Request to enter Stop mode */
- PWR_EnterSTOPMode(PWR_Regulator_ON, PWR_STOPEntry_WFI);
-
- /* Enable HSE */
- RCC_HSEConfig(RCC_HSE_ON);
-
- /* Wait till HSE is ready */
- HSEStartUpStatus = RCC_WaitForHSEStartUp();
- if (HSEStartUpStatus == SUCCESS)
- {
- /* Enable PLL */
- RCC_PLLCmd(ENABLE);
- /* Wait till PLL is ready */
- while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
- {}
- /* Select PLL as system clock source */
- RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
- /* Wait till PLL is used as system clock source */
- while (RCC_GetSYSCLKSource() != 0x08)
- {}
- }
- break;
-
- case HDMI_CEC_OPCODE_GET_CEC_VERSION:
- /* Send the Used CEC version */
- HDMI_CEC_TX_MessageStructPrivate.Header = ((MyLogicalAddress << 4) | HDMI_CEC_RX_MessageStructPrivate.Header >> 4);
- HDMI_CEC_TX_MessageStructPrivate.Opcode = HDMI_CEC_OPCODE_CEC_VERSION;
- HDMI_CEC_TX_MessageStructPrivate.Operande[0] = HDMI_CEC_VERSION; /* CEC Version */
- HDMI_CEC_TX_MessageStructPrivate.TxMessageLength = 0x01;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
-
- /* Retransmit message until 5 time */
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
- }
- break;
-
- case HDMI_CEC_OPCODE_GIVE_PHYSICAL_ADDRESS:
- /* Send the Physical address */
- errorstatus = HDMI_CEC_ReportPhysicalAddress();
- sendcount = 0;
- /* Retransmit message until 5 time */
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = HDMI_CEC_ReportPhysicalAddress();
- }
- break;
-
- case HDMI_CEC_OPCODE_FEATURE_ABORT:
- /* The device doesn't support the requested message type, or that it cannot
- execute it at the present time. */
- FeatureOpcode = HDMI_CEC_RX_MessageStructPrivate.Operande[0];
- AbortReason = HDMI_CEC_RX_MessageStructPrivate.Operande[1];
- break;
-
- case HDMI_CEC_OPCODE_GIVE_OSD_NAME:
- /* Send the OSD name = STM320518 CEC */
- HDMI_CEC_TX_MessageStructPrivate.Header = ((MyLogicalAddress << 4) | HDMI_CEC_RX_MessageStructPrivate.Header >> 4);
- HDMI_CEC_TX_MessageStructPrivate.Opcode = HDMI_CEC_OPCODE_SET_OSD_NAME;
- /* STM320518 */
- HDMI_CEC_TX_MessageStructPrivate.Operande[0] = 0x53;
- HDMI_CEC_TX_MessageStructPrivate.Operande[1] = 0x54;
- HDMI_CEC_TX_MessageStructPrivate.Operande[2] = 0x4D;
- HDMI_CEC_TX_MessageStructPrivate.Operande[3] = 0x33;
- HDMI_CEC_TX_MessageStructPrivate.Operande[4] = 0x32;
- HDMI_CEC_TX_MessageStructPrivate.Operande[5] = 0x30;
- HDMI_CEC_TX_MessageStructPrivate.Operande[6] = 0x35;
- HDMI_CEC_TX_MessageStructPrivate.Operande[7] = 0x31;
- HDMI_CEC_TX_MessageStructPrivate.Operande[8] = 0x38;
- HDMI_CEC_TX_MessageStructPrivate.Operande[9] = 0x20;
- /* CEC */
- HDMI_CEC_TX_MessageStructPrivate.Operande[10] = 0x43;
- HDMI_CEC_TX_MessageStructPrivate.Operande[11] = 0x45;
- HDMI_CEC_TX_MessageStructPrivate.Operande[12] = 0x43;
- HDMI_CEC_TX_MessageStructPrivate.TxMessageLength = 13;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
- sendcount = 0;
- /* Retransmit message until 5 time */
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
- }
- break;
-
- case HDMI_CEC_OPCODE_ROUTING_CHANGE:
- for (i = 0;i < 0x14;i++)
- {
- if ((HDMI_CEC_DeviceMap[i].PhysicalAddress_A == HDMI_CEC_RX_MessageStructPrivate.Operande[1] >> 4) &&
- (HDMI_CEC_DeviceMap[i].PhysicalAddress_B == HDMI_CEC_RX_MessageStructPrivate.Operande[1]&0x0F) &&
- (HDMI_CEC_DeviceMap[i].PhysicalAddress_C == HDMI_CEC_RX_MessageStructPrivate.Operande[0] >> 4) &&
- (HDMI_CEC_DeviceMap[i].PhysicalAddress_D == (HDMI_CEC_RX_MessageStructPrivate.Operande[0]&0x0F)))
- {
- HDMI_CEC_MapStruct.LogicalAddress = (HDMI_CEC_RX_MessageStructPrivate.Header >> 0x4) & 0x0F;
- HDMI_CEC_MapStruct.DeviceType = HDMI_CEC_RX_MessageStructPrivate.Operande[2];
- HDMI_CEC_DeviceMap[i] = HDMI_CEC_MapStruct;
- }
- }
- break;
-
- default:
- /* Send Abort feature */
- HDMI_CEC_TX_MessageStructPrivate.Header = ((MyLogicalAddress << 4) | HDMI_CEC_RX_MessageStructPrivate.Header >> 4);
- HDMI_CEC_TX_MessageStructPrivate.Opcode = HDMI_CEC_OPCODE_FEATURE_ABORT;
- HDMI_CEC_TX_MessageStructPrivate.Operande[0] = 0x02; /* Defines command to be performed */
- HDMI_CEC_TX_MessageStructPrivate.Operande[1] = HDMI_CEC_REFUSED; /* Reason for abort feature */
- HDMI_CEC_TX_MessageStructPrivate.TxMessageLength = 0x02;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
- sendcount = 0;
- /* Retransmit message until 5 time */
- while ((errorstatus != HDMI_CEC_OK) && sendcount < 0x5)
- {
- sendcount++;
- errorstatus = HDMI_CEC_TransmitMessage(&HDMI_CEC_TX_MessageStructPrivate);
- }
- break;
- }
- }
-
- /**
- * @brief Check the connected CEC devices.
- * @param None
- * @retval HDMI_CEC_Error
- */
- HDMI_CEC_Error HDMI_CEC_CheckConnectedDevices(void)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- uint32_t count = 0, i = 1;
-
- /*------------------------------- TV device --------------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x0);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag( CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[0][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
-
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Recording device 1 --------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4)|0x1);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag( CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[1][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
-
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Recording device 2 --------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x2);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag( CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[2][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
-
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*------------------------------ Tuner 1 -----------------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x3);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag( CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[3][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Playback device 1 ---------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x4);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[4][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*-------------------------------- Audio system ----------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x5);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[5][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
-
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*--------------------------------- Tuner 2 --------------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x6);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[6][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*--------------------------------- Tuner 3 --------------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x7);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[7][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
-
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Playback device 2 ---------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x8);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while(count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[8][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Recording device 3 --------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0x9);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while(count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[9][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*-------------------------------- Tuner 4 ---------------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0xA);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while (count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[10][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- /*---------------------------- Playback device 3 ---------------------------*/
- CEC_EndOfMessage();
-
- CEC_SendData((MyLogicalAddress << 4) | 0xB);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while(count < HDMI_CEC_TIMEOUT_VALUE)
- {
- if (CEC_GetFlagStatus(CEC_FLAG_TXACKE) != RESET)
- {
- errorstatus = HDMI_CEC_GetErrorStatus();
- CEC_ClearFlag(CEC_FLAG_TXACKE);
- break;
- }
- else if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- errorstatus = HDMI_CEC_OK;
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- if (errorstatus == HDMI_CEC_OK)
- {
- HDMI_CEC_Follower_String[11][1] = (uint8_t *)"1";
- i++;
- errorstatus = HDMI_CEC_OK;
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXBR|CEC_FLAG_TXEND);
-
- CECDevicesNumber = i - 1;
-
- return errorstatus;
- }
-
- /**
- * @brief Sink Physical address discovery.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code.
- */
- static HDMI_CEC_Error SinkPhysicalAddressDiscovery(void)
- {
- uint32_t DataNum=0;
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- uint32_t i = 0;
- I2C_InitTypeDef I2C_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
-
- /*------------------------------ Physical address discovery ----------------*/
- /* if HDMI_CEC_ROOT == 0x1*/
- MyPhysicalAddress = 0x0000;
- /* The HDMI-CEC here is configured as sink or as a repeater. The configuration
- of the +5V power signal and the HPD should be well configured.
- Implement here the EDID Structure to be sent to the HDMI source.
- For more details please refer to the HDMI specification.
- The EDID structure should be sent to the device source using the DDC Channel
- and using the HPD signal. */
-
- /* Enable CEC_I2C clocks */
- RCC_APB1PeriphClockCmd(HDMI_CEC_SINK_I2C_CLK, ENABLE);
-
- /* Enable CEC_I2C_GPIO and CEC_HPD_GPIO clocks */
- RCC_AHBPeriphClockCmd(HDMI_CEC_SINK_I2C_GPIO_CLK | HDMI_CEC_HPD_SINK_GPIO_CLK, ENABLE);
-
- I2C_DeInit(HDMI_CEC_SINK_I2C);
-
- GPIO_PinAFConfig(HDMI_CEC_SINK_I2C_GPIO_PORT, HDMI_CEC_SINK_I2C_SCL_PIN_SOURCE, GPIO_AF_1);
- GPIO_PinAFConfig(HDMI_CEC_SINK_I2C_GPIO_PORT, HDMI_CEC_SINK_I2C_SDA_PIN_SOURCE, GPIO_AF_1);
-
- /* Set PF6/PF7 as OD AF - I2C2_SCL/I2C2_SDA of Source*/
- GPIO_InitStructure.GPIO_Pin = HDMI_CEC_SINK_I2C_SDA_PIN | HDMI_CEC_SINK_I2C_SCL_PIN;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
- GPIO_Init(HDMI_CEC_SINK_I2C_GPIO_PORT, &GPIO_InitStructure);
-
- /* Set PA11 as PP - HPD */
- GPIO_InitStructure.GPIO_Pin = HDMI_CEC_HPD_SINK_PIN;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
- GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
- GPIO_Init(HDMI_CEC_HPD_SINK_GPIO_PORT, &GPIO_InitStructure);
-
- RCC_I2CCLKConfig(RCC_I2C1CLK_HSI);
-
- HDMI_CEC_SINK_I2C->CR1 &= (uint16_t)(~I2C_CR1_NOSTRETCH);
-
- I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
- I2C_InitStructure.I2C_Timing = HDMI_CEC_I2C_TIMING;
- I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
- /* Initialize the I2C_DigitalFilter member */
- I2C_InitStructure.I2C_DigitalFilter = 0x00;
- I2C_InitStructure.I2C_OwnAddress1 = HDMI_CEC_I2C_SLAVE_ADDRESS7;
- I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
- I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
- I2C_Init(HDMI_CEC_SINK_I2C, &I2C_InitStructure);
-
- /* Set the Hot plug detect signal */
- HDMI_CEC_HPD_HIGH();
-
- /* The HDMI-CEC here is configured as source or as a repeater. The configuration
- of the +5V power signal and the HPD should be well configured.
- The source should wait for HPD and then read the EDID structure. */
- while(GPIO_ReadInputDataBit(HDMI_CEC_HPD_SINK_GPIO_PORT, HDMI_CEC_HPD_SINK_PIN) == RESET)
- {
- }
-
- /* Wait for 100 ms after HPD was received */
- for(i = 0; i <0x5FFFFF; i++)
- {
- }
-
- /* Enable HDMI_CEC_SINK_I2C */
- I2C_Cmd(HDMI_CEC_SINK_I2C, ENABLE);
-
- /* Wait until ADDR is set */
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_ADDR));
-
- /* Clear ADDR flag */
- HDMI_CEC_SINK_I2C->ICR = I2C_ICR_ADDRCF;
-
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_RXNE));
-
- HDMI_CEC_SINK_I2C->RXDR;
-
- /* Wait until ADDR is set */
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_ADDR));
-
- /* Clear ADDR flag */
- HDMI_CEC_SINK_I2C->ICR = I2C_ICR_ADDRCF;
-
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_TXIS));
-
- while (DataNum != 256)
- {
- if (HDMI_CEC_SINK_I2C->ISR & I2C_ISR_TXIS)
- {
- /* Write data to TXDR */
- HDMI_CEC_SINK_I2C->TXDR = (uint8_t)(EDID_Structure[DataNum++]);
- }
- }
-
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_STOPF));
- while (!(HDMI_CEC_SINK_I2C->ISR & I2C_ISR_NACKF));
-
- /* Clear STOPF and NACKF flag */
- HDMI_CEC_SINK_I2C->ICR = ( I2C_ICR_STOPCF | I2C_ICR_NACKCF) ;
-
- return errorstatus;
- }
-
- /**
- * @brief Source Physical address discovery.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code.
- */
- static HDMI_CEC_Error SourcePhysicalAddressDiscovery(void)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
-
- #ifdef HDMI_CEC_USE_DDC
- uint32_t DataNum=0;
- GPIO_InitTypeDef GPIO_InitStructure;
- I2C_InitTypeDef I2C_InitStructure;
-
- /* Enable CEC_I2C clocks */
- RCC_APB1PeriphClockCmd(HDMI_CEC_I2C_CLK, ENABLE);
-
- /* Enable CEC_I2C_GPIO and CEC_HPD_GPIO clocks */
- RCC_AHBPeriphClockCmd(HDMI_CEC_I2C_GPIO_CLK | HDMI_CEC_HPD_SOURCE_GPIO_CLK, ENABLE);
-
- GPIO_PinAFConfig(HDMI_CEC_I2C_GPIO_PORT,HDMI_CEC_I2C_SCL_PIN_SOURCE,GPIO_AF_1);
- GPIO_PinAFConfig(HDMI_CEC_I2C_GPIO_PORT,HDMI_CEC_I2C_SDA_PIN_SOURCE,GPIO_AF_1);
-
- /* Configure CEC_I2C_SCL_PIN and CEC_I2C_SDA_PIN as Output open drain */
- GPIO_InitStructure.GPIO_Pin = HDMI_CEC_I2C_SCL_PIN | HDMI_CEC_I2C_SDA_PIN;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
- GPIO_Init(HDMI_CEC_I2C_GPIO_PORT, &GPIO_InitStructure);
-
- /* This configuration is only when the HDMI CEC is configured as source.
- The HDMI source has to provide the +5V Power signal to the sink.
- Then, the source will wait for HPD signal to be asserted from the sink.
- Once the HPD signal is detected the source shall read the EDID structure
- through the DDC channel. */
- /* Configure CEC_HPD_GPIO as Input pull down */
- GPIO_InitStructure.GPIO_Pin = HDMI_CEC_HPD_SOURCE_PIN;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
- GPIO_Init(HDMI_CEC_HPD_SOURCE_GPIO_PORT, &GPIO_InitStructure);
-
- /* I2C configuration */
- I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
- I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
- I2C_InitStructure.I2C_DigitalFilter = 0x00;
- I2C_InitStructure.I2C_OwnAddress1 = 0x00;
- I2C_InitStructure.I2C_Ack =I2C_Ack_Enable;
- I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
- I2C_InitStructure.I2C_Timing = HDMI_CEC_I2C_TIMING;
-
- /* I2C configuration */
- I2C_Init(HDMI_CEC_I2C, &I2C_InitStructure);
-
- /* I2C Peripheral Enable */
- I2C_Cmd(HDMI_CEC_I2C, ENABLE);
-
- /* Configure slave address, nbytes, reload and generate start */
- HDMI_CEC_I2C->CR2 = (uint32_t)(0xA0) | (uint32_t)(1 << 16) | I2C_CR2_START ;
-
- /* Wait until TXIS is set */
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_TXIS));
-
- /* Send memory address */
- HDMI_CEC_I2C->TXDR = (uint8_t)(0x00);
-
- /* Wait until TC is set */
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_TC));
-
- /* Update CR2 : set Nbytes and reload */
- HDMI_CEC_I2C->CR2 = (uint32_t)(0xA0) | I2C_CR2_RD_WRN | I2C_CR2_START | (uint32_t)(255 << 16) | I2C_CR2_RELOAD;
-
- /* Wait until all data are received */
- while (DataNum != 255)
- {
- /* Wait until RXNE flag is set */
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_RXNE));
-
- /* Read data from RXDR */
- pBuffer[DataNum]= (uint8_t)HDMI_CEC_I2C->RXDR;
-
- /* Update number of received data */
- DataNum++;
- }
-
- /* Wait until TCR flag is set */
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_TCR));
-
- /* Update CR2 : set Nbytes and end mode */
- HDMI_CEC_I2C->CR2 = (uint32_t)(1 << 16) | I2C_CR2_AUTOEND;
-
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_RXNE));
-
- /* Read data from RXDR */
- pBuffer[DataNum]= (uint8_t)HDMI_CEC_I2C->RXDR;
-
- /* Wait until STOPF flag is set */
- while (!(HDMI_CEC_I2C->ISR & I2C_ISR_STOPF));
-
- /* Clear STOPF flag */
- HDMI_CEC_I2C->ICR = I2C_ICR_STOPCF;
-
- MyPhysicalAddress = ((pBuffer[158] << 8) | pBuffer[159]);
- #else
- MyPhysicalAddress = 0x1000;
- #endif
-
- return errorstatus;
- }
-
- /**
- * @brief Allocate the logical address.
- * @param None
- * @retval HDMI_CEC_Error: CEC Error code.
- */
- static HDMI_CEC_Error LogicalAddressAllocation(void)
- {
- HDMI_CEC_Error errorstatus = HDMI_CEC_OK;
- uint32_t count = 0;
-
- /*------------------ Logical address allocation ----------------------------*/
- /* Get the device type */
- /* Device type = CEC_TV */
- if (DeviceType == HDMI_CEC_TV)
- {
- if (HDMI_CEC_ROOT)
- {
- MyLogicalAddress = 0x00;
- }
- else
- {
- CEC_OwnAddressConfig(0xE); /* Own address = 0xE */
-
- CEC_EndOfMessage();
-
- CEC_SendData(0xEE);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while ((CEC_GetFlagStatus(CEC_FLAG_TXACKE) == RESET) && (count < HDMI_CEC_TIMEOUT_VALUE))
- {
- if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- errorstatus = HDMI_CEC_GetErrorStatus();
-
- if (errorstatus == HDMI_CEC_TX_ACKNOWLEDGE)
- {
- MyLogicalAddress = 0x0E;
- errorstatus = HDMI_CEC_OK;
- }
- else if (errorstatus == HDMI_CEC_OK)
- {
- MyLogicalAddress = 0x0F;
- errorstatus = HDMI_CEC_DEVICE_UNREGISTRED;
- }
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXEND);
- }
-
- /* Device type = CEC_RECORDING */
- if (DeviceType == HDMI_CEC_RECORDING)
- {
- CEC_OwnAddressConfig(0x1); /* Own address = 0x1 */
-
- CEC_EndOfMessage();
-
- CEC_SendData(0x11);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- /* Wait till the header message is sent */
- while ((CEC_GetFlagStatus(CEC_FLAG_TXACKE) == RESET) && (count < HDMI_CEC_TIMEOUT_VALUE))
- {
- if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
-
- errorstatus = HDMI_CEC_GetErrorStatus();
-
- if (errorstatus == HDMI_CEC_TX_ACKNOWLEDGE)
- {
- MyLogicalAddress = 0x01;
- errorstatus = HDMI_CEC_OK;
- }
- else if (errorstatus == HDMI_CEC_OK)
- {
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXEND|CEC_FLAG_TXACKE|CEC_FLAG_TXBR);
-
- /* Clear the OAR */
- CEC_OwnAddressClear();
-
- CEC_OwnAddressConfig(0x2); /* Own address = 0x2 */
-
- CEC_EndOfMessage();
-
- CEC_SendData(0x22);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- count = 0;
-
- /* Wait till the header message is sent */
- while ((CEC_GetFlagStatus(CEC_FLAG_TXACKE) == RESET) && (count < HDMI_CEC_TIMEOUT_VALUE))
- {
- if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
- errorstatus = HDMI_CEC_GetErrorStatus();
-
- if (errorstatus == HDMI_CEC_TX_ACKNOWLEDGE)
- {
- MyLogicalAddress = 0x02;
- errorstatus = HDMI_CEC_OK;
- }
- else if (errorstatus == HDMI_CEC_OK)
- {
- /* Clear CEC ISR register */
- CEC_ClearFlag( CEC_FLAG_TXEND);
-
- CEC_OwnAddressClear();
-
- CEC_OwnAddressConfig(0x9); /* Own address = 0x9 */
-
- CEC_EndOfMessage();
-
- CEC_SendData(0x99);
-
- /* Start of message */
- CEC_StartOfMessage();
-
- count = 0;
-
- /* Wait till the header message is sent */
- while ((CEC_GetFlagStatus(CEC_FLAG_TXACKE) == RESET) && (count < HDMI_CEC_TIMEOUT_VALUE))
- {
- if(CEC_GetFlagStatus(CEC_FLAG_TXEND) != RESET)
- {
- break;
- }
- count++;
- }
-
- if (count >= HDMI_CEC_TIMEOUT_VALUE)
- {
- errorstatus = HDMI_CEC_TIMEOUT;
- return(errorstatus);
- }
- errorstatus = HDMI_CEC_GetErrorStatus();
-
- if (errorstatus == HDMI_CEC_TX_ACKNOWLEDGE)
- {
- MyLogicalAddress = 0x09;
- errorstatus = HDMI_CEC_OK;
- }
- else if (errorstatus == HDMI_CEC_OK)
- {
- MyLogicalAddress = 0x0F;
- errorstatus = HDMI_CEC_DEVICE_UNREGISTRED;
- }
- }
- }
- /* Clear CEC ISR register */
- CEC_ClearFlag(CEC_FLAG_TXEND|CEC_FLAG_TXACKE|CEC_FLAG_TXBR);
- }
-
- /* Device type = CEC_TUNER */
- if (DeviceTyp…
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