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Diffstat (limited to 'thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32373C_EVAL/stm32373c_eval_i2c_ee.c')
| -rw-r--r-- | thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32373C_EVAL/stm32373c_eval_i2c_ee.c | 722 |
1 files changed, 722 insertions, 0 deletions
diff --git a/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32373C_EVAL/stm32373c_eval_i2c_ee.c b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32373C_EVAL/stm32373c_eval_i2c_ee.c new file mode 100644 index 0000000..a608684 --- /dev/null +++ b/thirdparty/STM32_USB-FS-Device_Lib_V4.0.0/Utilities/STM32_EVAL/STM32373C_EVAL/stm32373c_eval_i2c_ee.c @@ -0,0 +1,722 @@ +/** + ****************************************************************************** + * @file stm32373c_eval_i2c_ee.c + * @author MCD Application Team + * @version V1.0.0 + * @date 20-September-2012 + * @brief This file provides a set of functions needed to manage an I2C M24LR64 + * and M24M01 EEPROM memory. + * + * =================================================================== + * Notes: + * - This driver is intended for STM32F37x families devices only. + * =================================================================== + * + * It implements a high level communication layer for read and write + * from/to this memory. The needed STM32F37x hardware resources (I2C and + * GPIO) are defined in stm32373c_eval.h file, and the initialization is + * performed in sEE_LowLevel_Init() function declared in stm32373c_eval.c + * file. + * You can easily tailor this driver to any other development board, + * by just adapting the defines for hardware resources and + * sEE_LowLevel_Init() function. + * + * @note In this driver, basic read and write functions (sEE_ReadBuffer() + * and sEE_WritePage()) use Polling mode to perform the data transfer + * to/from EEPROM memory. + * + * +-----------------------------------------------------------------+ + * | Pin assignment for M24M01 EEPROM | + * +---------------------------------------+-----------+-------------+ + * | STM32F37x I2C Pins | sEE | Pin | + * +---------------------------------------+-----------+-------------+ + * | . | NC | 1 | + * | . | E1(VDD) | 2 (3.3V) | + * | . | E2(GND) | 3 (0V) | + * | . | VSS | 4 (0V) | + * | sEE_I2C_SDA_PIN/ SDA | SDA | 5 | + * | sEE_I2C_SCL_PIN/ SCL | SCL | 6 | + * | . | /WC(VSS)| 7 (0V) | + * | . | VDD | 8 (3.3V) | + * +---------------------------------------+-----------+-------------+ + * +-----------------------------------------------------------------+ + * | Pin assignment for M24LR64 EEPROM | + * +---------------------------------------+-----------+-------------+ + * | STM32F37x I2C Pins | sEE | Pin | + * +---------------------------------------+-----------+-------------+ + * | . | E0(GND) | 1 (0V) | + * | . | AC0 | 2 | + * | . | AC1 | 3 | + * | . | VSS | 4 (0V) | + * | sEE_I2C_SDA_PIN/ SDA | SDA | 5 | + * | sEE_I2C_SCL_PIN/ SCL | SCL | 6 | + * | . | E1(GND) | 7 (0V) | + * | . | VDD | 8 (3.3V) | + * +---------------------------------------+-----------+-------------+ * + * + * * * + ****************************************************************************** + * @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 "stm32373c_eval_i2c_ee.h" + +/** @addtogroup Utilities + * @{ + */ + +/** @addtogroup STM32_EVAL + * @{ + */ + +/** @addtogroup STM32373C_EVAL + * @{ + */ + +/** @addtogroup STM32373C_EVAL_I2C_EE + * @brief This file includes the I2C EEPROM driver of STM32373C-EVAL board. + * @{ + */ + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Types + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Defines + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Macros + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Variables + * @{ + */ +__IO uint16_t sEEAddress = 0; +__IO uint32_t sEETimeout = sEE_LONG_TIMEOUT; +__IO uint16_t sEEDataNum; +/** + * @} + */ + + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Function_Prototypes + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32373C_EVAL_I2C_EE_Private_Functions + * @{ + */ + +/** + * @brief DeInitializes peripherals used by the I2C EEPROM driver. + * @param None + * @retval None + */ +void sEE_DeInit(void) +{ + sEE_I2C_LowLevel_DeInit(); +} + +/** + * @brief Initializes peripherals used by the I2C EEPROM driver. + * @param None + * @retval None + */ +void sEE_Init(void) +{ + I2C_InitTypeDef I2C_InitStructure; + + sEE_I2C_LowLevel_Init(); + + /*!< I2C configuration */ + /* sEE_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 = sEE_I2C_TIMING; + + /* Apply sEE_I2C configuration after enabling it */ + I2C_Init(sEE_I2C, &I2C_InitStructure); + + /* sEE_I2C Peripheral Enable */ + I2C_Cmd(sEE_I2C, ENABLE); + + /*!< Select the EEPROM address */ + sEEAddress = sEE_HW_ADDRESS; +} + +/** + * @brief Reads a block of data from the EEPROM. + * @param pBuffer : pointer to the buffer that receives the data read from + * the EEPROM. + * @param ReadAddr : EEPROM's internal address to start reading from. + * @param NumByteToRead : pointer to the variable holding number of bytes to + * be read from the EEPROM. + * + * @retval sEE_OK (0) if operation is correctly performed, else return value + * different from sEE_OK (0) or the timeout user callback. + */ +uint32_t sEE_ReadBuffer(uint8_t* pBuffer, uint16_t ReadAddr, uint16_t* NumByteToRead) +{ + uint32_t NumbOfSingle = 0, Count = 0, DataNum = 0, StartCom = 0; + + /* Get number of reload cycles */ + Count = (*NumByteToRead) / 255; + NumbOfSingle = (*NumByteToRead) % 255; + +#ifdef sEE_M24C08 + + /* Configure slave address, nbytes, reload and generate start */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send memory address */ + I2C_SendData(sEE_I2C, (uint8_t)ReadAddr); + +#elif defined(sEE_M24M01) || defined(sEE_M24C64_32) || defined (sEE_M24LR64) + + /* Configure slave address, nbytes, reload and generate start */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 2, I2C_SoftEnd_Mode, I2C_Generate_Start_Write); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send MSB of memory address */ + I2C_SendData(sEE_I2C, (uint8_t)((ReadAddr & 0xFF00) >> 8)); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send LSB of memory address */ + I2C_SendData(sEE_I2C, (uint8_t)(ReadAddr & 0x00FF)); + +#endif /*!< sEE_M24C08 */ + + /* Wait until TC flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TC) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* If number of Reload cycles is not equal to 0 */ + if (Count != 0) + { + /* Starting communication */ + StartCom = 1; + + /* Wait until all reload cycles are performed */ + while( Count != 0) + { + /* If a read transfer is performed */ + if (StartCom == 0) + { + /* Wait until TCR flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TCR) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + } + + /* if remains one read cycle */ + if ((Count == 1) && (NumbOfSingle == 0)) + { + /* if starting communication */ + if (StartCom != 0) + { + /* Configure slave address, end mode and start condition */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 255, I2C_AutoEnd_Mode, I2C_Generate_Start_Read); + } + else + { + /* Configure slave address, end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 255, I2C_AutoEnd_Mode, I2C_No_StartStop); + } + } + else + { + /* if starting communication */ + if (StartCom != 0) + { + /* Configure slave address, end mode and start condition */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 255, I2C_Reload_Mode, I2C_Generate_Start_Read); + } + else + { + /* Configure slave address, end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 255, I2C_Reload_Mode, I2C_No_StartStop); + } + } + + /* Update local variable */ + StartCom = 0; + DataNum = 0; + + /* Wait until all data are received */ + while (DataNum != 255) + { + /* Wait until RXNE flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_RXNE) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Read data from RXDR */ + pBuffer[DataNum]= I2C_ReceiveData(sEE_I2C); + + /* Update number of received data */ + DataNum++; + (*NumByteToRead)--; + } + /* Update Pointer of received buffer */ + pBuffer += DataNum; + + /* update number of reload cycle */ + Count--; + } + + /* If number of single data is not equal to 0 */ + if (NumbOfSingle != 0) + { + /* Wait until TCR flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TCR) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Update CR2 : set Nbytes and end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, (uint8_t)(NumbOfSingle), I2C_AutoEnd_Mode, I2C_No_StartStop); + + /* Reset local variable */ + DataNum = 0; + + /* Wait until all data are received */ + while (DataNum != NumbOfSingle) + { + /* Wait until RXNE flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_RXNE) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Read data from RXDR */ + pBuffer[DataNum]= I2C_ReceiveData(sEE_I2C); + + /* Update number of received data */ + DataNum++; + (*NumByteToRead)--; + } + } + } + else + { + /* Update CR2 : set Slave Address , set read request, generate Start and set end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, (uint32_t)(NumbOfSingle), I2C_AutoEnd_Mode, I2C_Generate_Start_Read); + + /* Reset local variable */ + DataNum = 0; + + /* Wait until all data are received */ + while (DataNum != NumbOfSingle) + { + /* Wait until RXNE flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_RXNE) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Read data from RXDR */ + pBuffer[DataNum]= I2C_ReceiveData(sEE_I2C); + + /* Update number of received data */ + DataNum++; + (*NumByteToRead)--; + } + } + + /* Wait until STOPF flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_STOPF) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Clear STOPF flag */ + I2C_ClearFlag(sEE_I2C, I2C_ICR_STOPCF); + + /* If all operations OK, return sEE_OK (0) */ + return sEE_OK; +} + +/** + * @brief Writes more than one byte to the EEPROM with a single WRITE cycle. + * + * @note The number of bytes (combined to write start address) must not + * cross the EEPROM page boundary. This function can only write into + * the boundaries of an EEPROM page. + * This function doesn't check on boundaries condition (in this driver + * the function sEE_WriteBuffer() which calls sEE_WritePage() is + * responsible of checking on Page boundaries). + * + * @param pBuffer : pointer to the buffer containing the data to be written to + * the EEPROM. + * @param WriteAddr : EEPROM's internal address to write to. + * @param NumByteToWrite : pointer to the variable holding number of bytes to + * be written into the EEPROM. + * + * @retval sEE_OK (0) if operation is correctly performed, else return value + * different from sEE_OK (0) or the timeout user callback. + */ +uint32_t sEE_WritePage(uint8_t* pBuffer, uint16_t WriteAddr, uint8_t* NumByteToWrite) +{ + uint32_t DataNum = 0; + +#ifdef sEE_M24C08 + + /* Configure slave address, nbytes, reload and generate start */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 1, I2C_Reload_Mode, I2C_Generate_Start_Write); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send memory address */ + I2C_SendData(sEE_I2C, (uint8_t)WriteAddr); + +#elif defined(sEE_M24M01) || defined(sEE_M24C64_32) || defined (sEE_M24LR64) + + /* Configure slave address, nbytes, reload and generate start */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 2, I2C_Reload_Mode, I2C_Generate_Start_Write); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send MSB of memory address */ + I2C_SendData(sEE_I2C, (uint8_t)((WriteAddr & 0xFF00) >> 8)); + + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Send LSB of memory address */ + I2C_SendData(sEE_I2C, (uint8_t)(WriteAddr & 0x00FF)); + +#endif /*!< sEE_M24C08 */ + + /* Wait until TCR flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TCR) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Update CR2 : set Slave Address , set write request, generate Start and set end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, (uint8_t)(*NumByteToWrite), I2C_AutoEnd_Mode, I2C_No_StartStop); + + while (DataNum != (*NumByteToWrite)) + { + /* Wait until TXIS flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_TXIS) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Write data to TXDR */ + I2C_SendData(sEE_I2C, (uint8_t)(pBuffer[DataNum])); + + /* Update number of transmitted data */ + DataNum++; + } + + /* Wait until STOPF flag is set */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_STOPF) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Clear STOPF flag */ + I2C_ClearFlag(sEE_I2C, I2C_ICR_STOPCF); + + /* If all operations OK, return sEE_OK (0) */ + return sEE_OK; +} + +/** + * @brief Writes buffer of data to the I2C EEPROM. + * @param pBuffer : pointer to the buffer containing the data to be written + * to the EEPROM. + * @param WriteAddr : EEPROM's internal address to write to. + * @param NumByteToWrite : number of bytes to write to the EEPROM. + * @retval None + */ +void sEE_WriteBuffer(uint8_t* pBuffer, uint16_t WriteAddr, uint16_t NumByteToWrite) +{ + uint16_t NumOfPage = 0, NumOfSingle = 0, count = 0; + uint16_t Addr = 0; + + Addr = WriteAddr % sEE_PAGESIZE; + count = sEE_PAGESIZE - Addr; + NumOfPage = NumByteToWrite / sEE_PAGESIZE; + NumOfSingle = NumByteToWrite % sEE_PAGESIZE; + + /*!< If WriteAddr is sEE_PAGESIZE aligned */ + if(Addr == 0) + { + /*!< If NumByteToWrite < sEE_PAGESIZE */ + if(NumOfPage == 0) + { + /* Store the number of data to be written */ + sEEDataNum = NumOfSingle; + /* Start writing data */ + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + } + /*!< If NumByteToWrite > sEE_PAGESIZE */ + else + { + while(NumOfPage--) + { + /* Store the number of data to be written */ + sEEDataNum = sEE_PAGESIZE; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + WriteAddr += sEE_PAGESIZE; + pBuffer += sEE_PAGESIZE; + } + + if(NumOfSingle!=0) + { + /* Store the number of data to be written */ + sEEDataNum = NumOfSingle; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + } + } + } + /*!< If WriteAddr is not sEE_PAGESIZE aligned */ + else + { + /*!< If NumByteToWrite < sEE_PAGESIZE */ + if(NumOfPage== 0) + { + /*!< If the number of data to be written is more than the remaining space + in the current page: */ + if (NumByteToWrite > count) + { + /* Store the number of data to be written */ + sEEDataNum = count; + /*!< Write the data contained in same page */ + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + + /* Store the number of data to be written */ + sEEDataNum = (NumByteToWrite - count); + /*!< Write the remaining data in the following page */ + sEE_WritePage((uint8_t*)(pBuffer + count), (WriteAddr + count), (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + } + else + { + /* Store the number of data to be written */ + sEEDataNum = NumOfSingle; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + } + } + /*!< If NumByteToWrite > sEE_PAGESIZE */ + else + { + NumByteToWrite -= count; + NumOfPage = NumByteToWrite / sEE_PAGESIZE; + NumOfSingle = NumByteToWrite % sEE_PAGESIZE; + + if(count != 0) + { + /* Store the number of data to be written */ + sEEDataNum = count; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + WriteAddr += count; + pBuffer += count; + } + + while(NumOfPage--) + { + /* Store the number of data to be written */ + sEEDataNum = sEE_PAGESIZE; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEETimeout = sEE_LONG_TIMEOUT; + sEE_WaitEepromStandbyState(); + WriteAddr += sEE_PAGESIZE; + pBuffer += sEE_PAGESIZE; + } + if(NumOfSingle != 0) + { + /* Store the number of data to be written */ + sEEDataNum = NumOfSingle; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + sEE_WaitEepromStandbyState(); + } + } + } +} + +/** + * @brief Wait for EEPROM Standby state. + * + * @note This function allows to wait and check that EEPROM has finished the + * last operation. It is mostly used after Write operation: after receiving + * the buffer to be written, the EEPROM may need additional time to actually + * perform the write operation. During this time, it doesn't answer to + * I2C packets addressed to it. Once the write operation is complete + * the EEPROM responds to its address. + * + * @param None + * + * @retval sEE_OK (0) if operation is correctly performed, else return value + * different from sEE_OK (0) or the timeout user callback. + */ +uint32_t sEE_WaitEepromStandbyState(void) +{ + __IO uint32_t sEETrials = 0; + + /* Keep looping till the slave acknowledge his address or maximum number + of trials is reached (this number is defined by sEE_MAX_TRIALS_NUMBER define + in stm32373c_eval_i2c_ee.h file) */ + + /* Configure CR2 register : set Slave Address and end mode */ + I2C_TransferHandling(sEE_I2C, sEEAddress, 0, I2C_AutoEnd_Mode, I2C_No_StartStop); + + do + { + /* Initialize sEETimeout */ + sEETimeout = sEE_FLAG_TIMEOUT; + + /* Clear NACKF */ + I2C_ClearFlag(sEE_I2C, I2C_ICR_NACKCF | I2C_ICR_STOPCF); + + /* Generate start */ + I2C_GenerateSTART(sEE_I2C, ENABLE); + + /* Wait until timeout elapsed */ + while (sEETimeout-- != 0); + + /* Check if the maximum allowed numbe of trials has bee reached */ + if (sEETrials++ == sEE_MAX_TRIALS_NUMBER) + { + /* If the maximum number of trials has been reached, exit the function */ + return sEE_TIMEOUT_UserCallback(); + } + } + while(I2C_GetFlagStatus(sEE_I2C, I2C_ISR_NACKF) != RESET); + + /* Clear STOPF */ + I2C_ClearFlag(sEE_I2C, I2C_ICR_STOPCF); + + /* Return sEE_OK if device is ready */ + return sEE_OK; +} + +#ifdef USE_DEFAULT_TIMEOUT_CALLBACK +/** + * @brief Basic management of the timeout situation. + * @param None. + * @retval None. + */ +uint32_t sEE_TIMEOUT_UserCallback(void) +{ + return 0; +} +#endif /* USE_DEFAULT_TIMEOUT_CALLBACK */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ + |