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Diffstat (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_i2c_tsensor.c')
| -rw-r--r-- | tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_i2c_tsensor.c | 977 |
1 files changed, 0 insertions, 977 deletions
diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_i2c_tsensor.c b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_i2c_tsensor.c deleted file mode 100644 index 2db762e..0000000 --- a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_i2c_tsensor.c +++ /dev/null @@ -1,977 +0,0 @@ -/** - ****************************************************************************** - * @file stm32_eval_i2c_tsensor.c - * @author MCD Application Team - * @version V4.5.0 - * @date 07-March-2011 - * @brief This file provides a set of functions needed to manage the I2C LM75 - * temperature sensor mounted on STM32xx-EVAL board (refer to stm32_eval.h - * to know about the boards supporting this sensor). - * It implements a high level communication layer for read and write - * from/to this sensor. The needed STM32 hardware resources (I2C and - * GPIO) are defined in stm32xx_eval.h file, and the initialization is - * performed in LM75_LowLevel_Init() function declared in stm32xx_eval.c - * file. - * - * Note: - * ----- - * This driver uses the DMA method to send and receive data on I2C bus, - * which allows higher efficiency and reliability of the communication. - * - * You can easily tailor this driver to any other development board, - * by just adapting the defines for hardware resources and - * LM75_LowLevel_Init() function. - * - * +-----------------------------------------------------------------+ - * | Pin assignment | - * +---------------------------------------+-----------+-------------+ - * | STM32 I2C Pins | STLM75 | Pin | - * +---------------------------------------+-----------+-------------+ - * | LM75_I2C_SDA_PIN/ SDA | SDA | 1 | - * | LM75_I2C_SCL_PIN/ SCL | SCL | 2 | - * | LM75_I2C_SMBUSALERT_PIN/ SMBUS ALERT | OS/INT | 3 | - * | . | GND | 4 (0V) | - * | . | GND | 5 (0V) | - * | . | GND | 6 (0V) | - * | . | GND | 7 (0V) | - * | . | 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 "stm32_eval_i2c_tsensor.h" - -/** @addtogroup Utilities - * @{ - */ - -/** @addtogroup STM32_EVAL - * @{ - */ - -/** @addtogroup Common - * @{ - */ - -/** @addtogroup STM32_EVAL_I2C_TSENSOR - * @brief This file includes the LM75 Temperature Sensor driver of - * STM32-EVAL boards. - * @{ - */ - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Types - * @{ - */ -/** - * @} - */ - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Defines - * @{ - */ -#define LM75_SD_SET 0x01 /*!< Set SD bit in the configuration register */ -#define LM75_SD_RESET 0xFE /*!< Reset SD bit in the configuration register */ -/** - * @} - */ - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Macros - * @{ - */ -/** - * @} - */ - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Variables - * @{ - */ - -__IO uint32_t LM75_Timeout = LM75_LONG_TIMEOUT; -/** - * @} - */ - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Function_Prototypes - * @{ - */ -static void LM75_DMA_Config(LM75_DMADirection_TypeDef Direction, uint8_t* buffer, uint8_t NumData); - -/** - * @} - */ - - -/** @defgroup STM32_EVAL_I2C_TSENSOR_Private_Functions - * @{ - */ - -/** - * @brief DeInitializes the LM75_I2C. - * @param None - * @retval None - */ -void LM75_DeInit(void) -{ - LM75_LowLevel_DeInit(); -} - -/** - * @brief Initializes the LM75_I2C. - * @param None - * @retval None - */ -void LM75_Init(void) -{ - I2C_InitTypeDef I2C_InitStructure; - - LM75_LowLevel_Init(); - - I2C_DeInit(LM75_I2C); - - /*!< LM75_I2C Init */ - I2C_InitStructure.I2C_Mode = I2C_Mode_SMBusHost; - I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; - I2C_InitStructure.I2C_OwnAddress1 = 0x00; - I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; - I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; - I2C_InitStructure.I2C_ClockSpeed = LM75_I2C_SPEED; - I2C_Init(LM75_I2C, &I2C_InitStructure); - - /*!< Enable SMBus Alert interrupt */ - I2C_ITConfig(LM75_I2C, I2C_IT_ERR, ENABLE); - - /*!< LM75_I2C Init */ - I2C_Cmd(LM75_I2C, ENABLE); -} - - -/** - * @brief Configure the DMA Peripheral used to handle communication via I2C. - * @param None - * @retval None - */ - -static void LM75_DMA_Config(LM75_DMADirection_TypeDef Direction, uint8_t* buffer, uint8_t NumData) -{ - DMA_InitTypeDef DMA_InitStructure; - - RCC_AHBPeriphClockCmd(LM75_DMA_CLK, ENABLE); - - /* Initialize the DMA_PeripheralBaseAddr member */ - DMA_InitStructure.DMA_PeripheralBaseAddr = LM75_I2C_DR; - /* Initialize the DMA_MemoryBaseAddr member */ - DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)buffer; - /* Initialize the DMA_PeripheralInc member */ - DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; - /* Initialize the DMA_MemoryInc member */ - DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; - /* Initialize the DMA_PeripheralDataSize member */ - DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; - /* Initialize the DMA_MemoryDataSize member */ - DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; - /* Initialize the DMA_Mode member */ - DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; - /* Initialize the DMA_Priority member */ - DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; - /* Initialize the DMA_M2M member */ - DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; - - /* If using DMA for Reception */ - if (Direction == LM75_DMA_RX) - { - /* Initialize the DMA_DIR member */ - DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; - - /* Initialize the DMA_BufferSize member */ - DMA_InitStructure.DMA_BufferSize = NumData; - - DMA_DeInit(LM75_DMA_RX_CHANNEL); - - DMA_Init(LM75_DMA_RX_CHANNEL, &DMA_InitStructure); - } - /* If using DMA for Transmission */ - else if (Direction == LM75_DMA_TX) - { - /* Initialize the DMA_DIR member */ - DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; - - /* Initialize the DMA_BufferSize member */ - DMA_InitStructure.DMA_BufferSize = NumData; - - DMA_DeInit(LM75_DMA_TX_CHANNEL); - - DMA_Init(LM75_DMA_TX_CHANNEL, &DMA_InitStructure); - } -} - - -/** - * @brief Checks the LM75 status. - * @param None - * @retval ErrorStatus: LM75 Status (ERROR or SUCCESS). - */ -ErrorStatus LM75_GetStatus(void) -{ - uint32_t I2C_TimeOut = I2C_TIMEOUT; - - /*!< Clear the LM75_I2C AF flag */ - I2C_ClearFlag(LM75_I2C, I2C_FLAG_AF); - - /*!< Enable LM75_I2C acknowledgement if it is already disabled by other function */ - I2C_AcknowledgeConfig(LM75_I2C, ENABLE); - - /*---------------------------- Transmission Phase ---------------------------*/ - - /*!< Send LM75_I2C START condition */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /*!< Test on LM75_I2C EV5 and clear it */ - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) && I2C_TimeOut) /*!< EV5 */ - { - I2C_TimeOut--; - } - if (I2C_TimeOut == 0) - { - return ERROR; - } - - I2C_TimeOut = I2C_TIMEOUT; - - /*!< Send STLM75 slave address for write */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - while ((!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && I2C_TimeOut)/* EV6 */ - { - I2C_TimeOut--; - } - - if ((I2C_GetFlagStatus(LM75_I2C, I2C_FLAG_AF) != 0x00) || (I2C_TimeOut == 0)) - { - return ERROR; - } - else - { - return SUCCESS; - } -} -/** - * @brief Read the specified register from the LM75. - * @param RegName: specifies the LM75 register to be read. - * This member can be one of the following values: - * - LM75_REG_TEMP: temperature register - * - LM75_REG_TOS: Over-limit temperature register - * - LM75_REG_THYS: Hysteresis temperature register - * @retval LM75 register value. - */ -uint16_t LM75_ReadReg(uint8_t RegName) -{ - uint8_t LM75_BufferRX[2] ={0,0}; - uint16_t tmp = 0; - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_RX, (uint8_t*)LM75_BufferRX, 2); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(LM75_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send device address for write */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send the device's internal address to write to */ - I2C_SendData(LM75_I2C, RegName); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send LM75 address for read */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_RX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_RX_TCFLAG); - - /*!< Store LM75_I2C received data */ - tmp = (uint16_t)(LM75_BufferRX[0] << 8); - tmp |= LM75_BufferRX[1]; - - /* return a Reg value */ - return (uint16_t)tmp; -} - -/** - * @brief Write to the specified register of the LM75. - * @param RegName: specifies the LM75 register to be written. - * This member can be one of the following values: - * - LM75_REG_TOS: Over-limit temperature register - * - LM75_REG_THYS: Hysteresis temperature register - * @param RegValue: value to be written to LM75 register. - * @retval None - */ -uint8_t LM75_WriteReg(uint8_t RegName, uint16_t RegValue) -{ - uint8_t LM75_BufferTX[2] ={0,0}; - LM75_BufferTX[0] = (uint8_t)(RegValue >> 8); - LM75_BufferTX[1] = (uint8_t)(RegValue); - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_TX, (uint8_t*)LM75_BufferTX, 2); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB) == RESET) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the slave address and enable writing operation */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the first address for r/w operations */ - I2C_SendData(LM75_I2C, RegName); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_TX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Wait until BTF Flag is set before generating STOP */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA TX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_TX_TCFLAG); - - return LM75_OK; -} - -/** - * @brief Read Temperature register of LM75: double temperature value. - * @param None - * @retval LM75 measured temperature value. - */ -uint16_t LM75_ReadTemp(void) -{ - uint8_t LM75_BufferRX[2] ={0,0}; - uint16_t tmp = 0; - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_RX, (uint8_t*)LM75_BufferRX, 2); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(LM75_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send device address for write */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send the device's internal address to write to */ - I2C_SendData(LM75_I2C, LM75_REG_TEMP); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send LM75 address for read */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_RX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_RX_TCFLAG); - - /*!< Store LM75_I2C received data */ - tmp = (uint16_t)(LM75_BufferRX[0] << 8); - tmp |= LM75_BufferRX[1]; - - /*!< Return Temperature value */ - return (uint16_t)(tmp >> 7); -} - -/** - * @brief Read the configuration register from the LM75. - * @param None - * @retval LM75 configuration register value. - */ -uint8_t LM75_ReadConfReg(void) -{ - uint8_t LM75_BufferRX[2] ={0,0}; - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_RX, (uint8_t*)LM75_BufferRX, 2); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(LM75_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send device address for write */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send the device's internal address to write to */ - I2C_SendData(LM75_I2C, LM75_REG_CONF); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send LM75 address for read */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_RX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_RX_TCFLAG); - - /*!< Return Temperature value */ - return (uint8_t)LM75_BufferRX[0]; -} - -/** - * @brief Write to the configuration register of the LM75. - * @param RegValue: sepecifies the value to be written to LM75 configuration - * register. - * @retval None - */ -uint8_t LM75_WriteConfReg(uint8_t RegValue) -{ - uint8_t LM75_BufferTX = 0; - LM75_BufferTX = (uint8_t)(RegValue); - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_TX, (uint8_t*)(&LM75_BufferTX), 1); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB) == RESET) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the slave address and enable writing operation */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the first address for r/w operations */ - I2C_SendData(LM75_I2C, LM75_REG_CONF); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_TX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Wait until BTF Flag is set before generating STOP */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA TX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_TX_TCFLAG); - - return LM75_OK; - -} - -/** - * @brief Enables or disables the LM75. - * @param NewState: specifies the LM75 new status. This parameter can be ENABLE - * or DISABLE. - * @retval None - */ -uint8_t LM75_ShutDown(FunctionalState NewState) -{ - uint8_t LM75_BufferRX[2] ={0,0}; - uint8_t LM75_BufferTX = 0; - __IO uint8_t RegValue = 0; - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_RX, (uint8_t*)LM75_BufferRX, 2); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(LM75_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send device address for write */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send the device's internal address to write to */ - I2C_SendData(LM75_I2C, LM75_REG_CONF); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send LM75 address for read */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_RX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(LM75_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_RX_TCFLAG); - - /*!< Get received data */ - RegValue = (uint8_t)LM75_BufferRX[0]; - - /*---------------------------- Transmission Phase ---------------------------*/ - - /*!< Enable or disable SD bit */ - if (NewState != DISABLE) - { - /*!< Enable LM75 */ - LM75_BufferTX = RegValue & LM75_SD_RESET; - } - else - { - /*!< Disable LM75 */ - LM75_BufferTX = RegValue | LM75_SD_SET; - } - - /* Test on BUSY Flag */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BUSY)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Configure DMA Peripheral */ - LM75_DMA_Config(LM75_DMA_TX, (uint8_t*)(&LM75_BufferTX), 1); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(LM75_I2C, ENABLE); - - /* Test on SB Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_SB) == RESET) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the slave address and enable writing operation */ - I2C_Send7bitAddress(LM75_I2C, LM75_ADDR, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while (!I2C_CheckEvent(LM75_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Transmit the first address for r/w operations */ - I2C_SendData(LM75_I2C, LM75_REG_CONF); - - /* Test on TXE FLag (data sent) */ - LM75_Timeout = LM75_FLAG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(LM75_I2C,ENABLE); - - /* Enable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while (!DMA_GetFlagStatus(LM75_DMA_TX_TCFLAG)) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Wait until BTF Flag is set before generating STOP */ - LM75_Timeout = LM75_LONG_TIMEOUT; - while ((!I2C_GetFlagStatus(LM75_I2C,I2C_FLAG_BTF))) - { - if((LM75_Timeout--) == 0) return LM75_TIMEOUT_UserCallback(); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(LM75_I2C, ENABLE); - - /* Disable DMA TX Channel */ - DMA_Cmd(LM75_DMA_TX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(LM75_I2C,DISABLE); - - /* Clear DMA TX Transfer Complete Flag */ - DMA_ClearFlag(LM75_DMA_TX_TCFLAG); - - return LM75_OK; -} - -/** - * @} - */ - - -/** - * @} - */ - - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |