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Diffstat (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32L152_EVAL/stm32l152_eval_i2c_ee.c')
| -rw-r--r-- | tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32L152_EVAL/stm32l152_eval_i2c_ee.c | 810 |
1 files changed, 810 insertions, 0 deletions
diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32L152_EVAL/stm32l152_eval_i2c_ee.c b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32L152_EVAL/stm32l152_eval_i2c_ee.c new file mode 100644 index 0000000..27c1638 --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32L152_EVAL/stm32l152_eval_i2c_ee.c @@ -0,0 +1,810 @@ +/** + ****************************************************************************** + * @file stm32l152_eval_i2c_ee.c + * @author MCD Application Team + * @version V4.5.0 + * @date 07-March-2011 + * @brief This file provides a set of functions needed to manage an I2C M24CXX + * EEPROM memory. + * + * =================================================================== + * Notes: + * - This driver is intended for STM32L1xx families devices only. + * - There is no I2C EEPROM memory available in STM32L152-EVAL board, + * to use this driver you have to build your own hardware. + * =================================================================== + * + * It implements a high level communication layer for read and write + * from/to this memory. The needed STM32 hardware resources (I2C and + * GPIO) are defined in stm32l152_eval.h file, and the initialization is + * performed in sEE_LowLevel_Init() function declared in stm32l152_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 the DMA to perform the data transfer + * to/from EEPROM memory (except when number of requested data is + * equal to 1). Thus, after calling these two functions, user + * application may perform other tasks while DMA is transferring + * data. The application should then monitor the variable holding + * the number of data in order to determine when the transfer is + * completed (variable decremented to 0). Stopping transfer tasks + * are performed into DMA interrupt handlers (which are integrated + * into this driver). + * + * +-----------------------------------------------------------------+ + * | Pin assignment | + * +---------------------------------------+-----------+-------------+ + * | STM32 I2C Pins | sEE | Pin | + * +---------------------------------------+-----------+-------------+ + * | . | E0(GND) | 1 (0V) | + * | . | E1(GND) | 2 (0V) | + * | . | E2(GND) | 3 (0V) | + * | . | E0(VSS) | 4 (0V) | + * | sEE_I2C_SDA_PIN/ SDA | SDA | 5 | + * | sEE_I2C_SCL_PIN/ SCL | SCL | 6 | + * | . | /WC(VDD)| 7 (3.3V) | + * | . | VDD | 8 (3.3V) | + * +---------------------------------------+-----------+-------------+ + ****************************************************************************** + * @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>© COPYRIGHT 2011 STMicroelectronics</center></h2> + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l152_eval_i2c_ee.h" + +/** @addtogroup Utilities + * @{ + */ + +/** @addtogroup STM32_EVAL + * @{ + */ + +/** @addtogroup STM32L152_EVAL + * @{ + */ + +/** @addtogroup STM32L152_EVAL_I2C_EE + * @brief This file includes the I2C EEPROM driver of STM32L152-EVAL board. + * @{ + */ + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Types + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Defines + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Macros + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Variables + * @{ + */ +__IO uint16_t sEEAddress = 0; +__IO uint32_t sEETimeout = sEE_LONG_TIMEOUT; +__IO uint16_t* sEEDataReadPointer; +__IO uint8_t* sEEDataWritePointer; +__IO uint8_t sEEDataNum; +/** + * @} + */ + + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Function_Prototypes + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32L152_EVAL_I2C_EE_Private_Functions + * @{ + */ + +/** + * @brief DeInitializes peripherals used by the I2C EEPROM driver. + * @param None + * @retval None + */ +void sEE_DeInit(void) +{ + sEE_LowLevel_DeInit(); +} + +/** + * @brief Initializes peripherals used by the I2C EEPROM driver. + * @param None + * @retval None + */ +void sEE_Init(void) +{ + I2C_InitTypeDef I2C_InitStructure; + + sEE_LowLevel_Init(); + + /*!< I2C configuration */ + /* sEE_I2C configuration */ + I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; + I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; + I2C_InitStructure.I2C_OwnAddress1 = I2C_SLAVE_ADDRESS7; + I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; + I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; + I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED; + + /* sEE_I2C Peripheral Enable */ + I2C_Cmd(sEE_I2C, ENABLE); + /* Apply sEE_I2C configuration after enabling it */ + I2C_Init(sEE_I2C, &I2C_InitStructure); + + /* Enable the sEE_I2C peripheral DMA requests */ + I2C_DMACmd(sEE_I2C, ENABLE); + +#if defined (sEE_M24C64_32) + /*!< Select the EEPROM address according to the state of E0, E1, E2 pins */ + sEEAddress = sEE_HW_ADDRESS; +#elif defined (sEE_M24C08) + /*!< depending on the sEE Address selected in the i2c_ee.h file */ + #ifdef sEE_Block0_ADDRESS + /*!< Select the sEE Block0 to write on */ + sEEAddress = sEE_Block0_ADDRESS; + #endif + + #ifdef sEE_Block1_ADDRESS + /*!< Select the sEE Block1 to write on */ + sEEAddress = sEE_Block1_ADDRESS; + #endif + + #ifdef sEE_Block2_ADDRESS + /*!< Select the sEE Block2 to write on */ + sEEAddress = sEE_Block2_ADDRESS; + #endif + + #ifdef sEE_Block3_ADDRESS + /*!< Select the sEE Block3 to write on */ + sEEAddress = sEE_Block3_ADDRESS; + #endif +#endif /*!< sEE_M24C64_32 */ +} + +/** + * @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. + * + * @note The variable pointed by NumByteToRead is reset to 0 when all the + * data are read from the EEPROM. Application should monitor this + * variable in order know when the transfer is complete. + * + * @note When number of data to be read is higher than 1, this function just + * configures the communication and enable the DMA channel to transfer data. + * Meanwhile, the user application may perform other tasks. + * When number of data to be read is 1, then the DMA is not used. The byte + * is read in polling mode. + * + * @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) +{ + /* Set the pointer to the Number of data to be read. This pointer will be used + by the DMA Transfer Completer interrupt Handler in order to reset the + variable to 0. User should check on this variable in order to know if the + DMA transfer has been complete or not. */ + sEEDataReadPointer = NumByteToRead; + + /*!< While the bus is busy */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send START condition */ + I2C_GenerateSTART(sEE_I2C, ENABLE); + + /*!< Test on EV5 and clear it (cleared by reading SR1 then writing to DR) */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send EEPROM address for write */ + I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Transmitter); + + /*!< Test on EV6 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + +#ifdef sEE_M24C08 + + /*!< Send the EEPROM's internal address to read from: Only one byte address */ + I2C_SendData(sEE_I2C, ReadAddr); + +#elif defined (sEE_M24C64_32) + + /*!< Send the EEPROM's internal address to read from: MSB of the address first */ + I2C_SendData(sEE_I2C, (uint8_t)((ReadAddr & 0xFF00) >> 8)); + + /*!< Test on EV8 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send the EEPROM's internal address to read from: LSB of the address */ + I2C_SendData(sEE_I2C, (uint8_t)(ReadAddr & 0x00FF)); + +#endif /*!< sEE_M24C08 */ + + /*!< Test on EV8 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BTF) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send STRAT condition a second time */ + I2C_GenerateSTART(sEE_I2C, ENABLE); + + /*!< Test on EV5 and clear it (cleared by reading SR1 then writing to DR) */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send EEPROM address for read */ + I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Receiver); + + /* If number of data to be read is 1, then DMA couldn't be used */ + /* One Byte Master Reception procedure (POLLING) ---------------------------*/ + if ((uint16_t)(*NumByteToRead) < 2) + { + /* Wait on ADDR flag to be set (ADDR is still not cleared at this level */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_ADDR) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Disable Acknowledgement */ + I2C_AcknowledgeConfig(sEE_I2C, DISABLE); + + /* Clear ADDR register by reading SR1 then SR2 register (SR1 has already been read) */ + (void)sEE_I2C->SR2; + + /*!< Send STOP Condition */ + I2C_GenerateSTOP(sEE_I2C, ENABLE); + + /* Wait for the byte to be received */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_RXNE) == RESET) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Read the byte received from the EEPROM */ + *pBuffer = I2C_ReceiveData(sEE_I2C); + + /*!< Decrement the read bytes counter */ + (uint16_t)(*NumByteToRead)--; + + /* Wait to make sure that STOP control bit has been cleared */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(sEE_I2C->CR1 & I2C_CR1_STOP) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Re-Enable Acknowledgement to be ready for another reception */ + I2C_AcknowledgeConfig(sEE_I2C, ENABLE); + } + else/* More than one Byte Master Reception procedure (DMA) -----------------*/ + { + /*!< Test on EV6 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Configure the DMA Rx Channel with the buffer address and the buffer size */ + sEE_LowLevel_DMAConfig((uint32_t)pBuffer, (uint16_t)(*NumByteToRead), sEE_DIRECTION_RX); + + /* Inform the DMA that the next End Of Transfer Signal will be the last one */ + I2C_DMALastTransferCmd(sEE_I2C, ENABLE); + + /* Enable the DMA Rx Channel */ + DMA_Cmd(sEE_I2C_DMA_CHANNEL_RX, ENABLE); + } + + /* 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. + * + * @note The variable pointed by NumByteToWrite is reset to 0 when all the + * data are written to the EEPROM. Application should monitor this + * variable in order know when the transfer is complete. + * + * @note This function just configure the communication and enable the DMA + * channel to transfer data. Meanwhile, the user application may perform + * other tasks in parallel. + * + * @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) +{ + /* Set the pointer to the Number of data to be written. This pointer will be used + by the DMA Transfer Completer interrupt Handler in order to reset the + variable to 0. User should check on this variable in order to know if the + DMA transfer has been complete or not. */ + sEEDataWritePointer = NumByteToWrite; + + /*!< While the bus is busy */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send START condition */ + I2C_GenerateSTART(sEE_I2C, ENABLE); + + /*!< Test on EV5 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send EEPROM address for write */ + sEETimeout = sEE_FLAG_TIMEOUT; + I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Transmitter); + + /*!< Test on EV6 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + +#ifdef sEE_M24C08 + + /*!< Send the EEPROM's internal address to write to : only one byte Address */ + I2C_SendData(sEE_I2C, WriteAddr); + +#elif defined(sEE_M24C64_32) + + /*!< Send the EEPROM's internal address to write to : MSB of the address first */ + I2C_SendData(sEE_I2C, (uint8_t)((WriteAddr & 0xFF00) >> 8)); + + /*!< Test on EV8 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send the EEPROM's internal address to write to : LSB of the address */ + I2C_SendData(sEE_I2C, (uint8_t)(WriteAddr & 0x00FF)); + +#endif /*!< sEE_M24C08 */ + + /*!< Test on EV8 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTING)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* Configure the DMA Tx Channel with the buffer address and the buffer size */ + sEE_LowLevel_DMAConfig((uint32_t)pBuffer, (uint8_t)(*NumByteToWrite), sEE_DIRECTION_TX); + + /* Enable the DMA Tx Channel */ + DMA_Cmd(sEE_I2C_DMA_CHANNEL_TX, ENABLE); + + /* 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) +{ + uint8_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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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 conained in same page */ + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + sEE_WaitEepromStandbyState(); + } + else + { + /* Store the number of data to be written */ + sEEDataNum = NumOfSingle; + sEE_WritePage(pBuffer, WriteAddr, (uint8_t*)(&sEEDataNum)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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)); + /* Wait transfer through DMA to be complete */ + sEETimeout = sEE_LONG_TIMEOUT; + while (sEEDataNum > 0) + { + if((sEETimeout--) == 0) {sEE_TIMEOUT_UserCallback(); return;}; + } + 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 uint16_t tmpSR1 = 0; + __IO uint32_t sEETrials = 0; + + /*!< While the bus is busy */ + sEETimeout = sEE_LONG_TIMEOUT; + while(I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BUSY)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /* 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 stm32_eval_i2c_ee.h file) */ + while (1) + { + /*!< Send START condition */ + I2C_GenerateSTART(sEE_I2C, ENABLE); + + /*!< Test on EV5 and clear it */ + sEETimeout = sEE_FLAG_TIMEOUT; + while(!I2C_CheckEvent(sEE_I2C, I2C_EVENT_MASTER_MODE_SELECT)) + { + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + + /*!< Send EEPROM address for write */ + I2C_Send7bitAddress(sEE_I2C, sEEAddress, I2C_Direction_Transmitter); + + /* Wait for ADDR flag to be set (Slave acknowledged his address) */ + sEETimeout = sEE_LONG_TIMEOUT; + do + { + /* Get the current value of the SR1 register */ + tmpSR1 = sEE_I2C->SR1; + + /* Update the timeout value and exit if it reach 0 */ + if((sEETimeout--) == 0) return sEE_TIMEOUT_UserCallback(); + } + /* Keep looping till the Address is acknowledged or the AF flag is + set (address not acknowledged at time) */ + while((tmpSR1 & (I2C_SR1_ADDR | I2C_SR1_AF)) == 0); + + /* Check if the ADDR flag has been set */ + if (tmpSR1 & I2C_SR1_ADDR) + { + /* Clear ADDR Flag by reading SR1 then SR2 registers (SR1 have already + been read) */ + (void)sEE_I2C->SR2; + + /*!< STOP condition */ + I2C_GenerateSTOP(sEE_I2C, ENABLE); + + /* Exit the function */ + return sEE_OK; + } + else + { + /*!< Clear AF flag */ + I2C_ClearFlag(sEE_I2C, I2C_FLAG_AF); + } + + /* 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(); + } + } +} + +/** + * @brief This function handles the DMA Tx Channel interrupt Handler. + * @param None + * @retval None + */ +void sEE_I2C_DMA_TX_IRQHandler(void) +{ + /* Check if the DMA transfer is complete */ + if(DMA_GetFlagStatus(sEE_I2C_DMA_FLAG_TX_TC) != RESET) + { + /* Disable the DMA Tx Channel and Clear all its Flags */ + DMA_Cmd(sEE_I2C_DMA_CHANNEL_TX, DISABLE); + DMA_ClearFlag(sEE_I2C_DMA_FLAG_TX_GL); + + /*!< Wait till all data have been physically transferred on the bus */ + sEETimeout = sEE_LONG_TIMEOUT; + while(!I2C_GetFlagStatus(sEE_I2C, I2C_FLAG_BTF)) + { + if((sEETimeout--) == 0) sEE_TIMEOUT_UserCallback(); + } + + /*!< Send STOP condition */ + I2C_GenerateSTOP(sEE_I2C, ENABLE); + + /* Reset the variable holding the number of data to be written */ + *sEEDataWritePointer = 0; + } +} + +/** + * @brief This function handles the DMA Rx Channel interrupt Handler. + * @param None + * @retval None + */ +void sEE_I2C_DMA_RX_IRQHandler(void) +{ + /* Check if the DMA transfer is complete */ + if(DMA_GetFlagStatus(sEE_I2C_DMA_FLAG_RX_TC) != RESET) + { + /*!< Send STOP Condition */ + I2C_GenerateSTOP(sEE_I2C, ENABLE); + + /* Disable the DMA Rx Channel and Clear all its Flags */ + DMA_Cmd(sEE_I2C_DMA_CHANNEL_RX, DISABLE); + DMA_ClearFlag(sEE_I2C_DMA_FLAG_RX_GL); + + /* Reset the variable holding the number of data to be read */ + *sEEDataReadPointer = 0; + } +} + +#ifdef USE_DEFAULT_TIMEOUT_CALLBACK +/** + * @brief Basic management of the timeout situation. + * @param None. + * @retval None. + */ +uint32_t sEE_TIMEOUT_UserCallback(void) +{ + /* Block communication and all processes */ + while (1) + { + } +} +#endif /* USE_DEFAULT_TIMEOUT_CALLBACK */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |