--- /dev/null
+/**\r
+ ******************************************************************************\r
+ * @file stm32l1xx_i2c.h\r
+ * @author MCD Application Team\r
+ * @version V1.0.0\r
+ * @date 31-December-2010\r
+ * @brief This file contains all the functions prototypes for the I2C firmware \r
+ * library.\r
+ ******************************************************************************\r
+ * @attention\r
+ *\r
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS\r
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE\r
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY\r
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING\r
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE\r
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.\r
+ *\r
+ * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>\r
+ ****************************************************************************** \r
+ */ \r
+\r
+/* Define to prevent recursive inclusion -------------------------------------*/\r
+#ifndef __STM32L1xx_I2C_H\r
+#define __STM32L1xx_I2C_H\r
+\r
+#ifdef __cplusplus\r
+ extern "C" {\r
+#endif\r
+\r
+/* Includes ------------------------------------------------------------------*/\r
+#include "stm32l1xx.h"\r
+\r
+/** @addtogroup STM32L1xx_StdPeriph_Driver\r
+ * @{\r
+ */\r
+\r
+/** @addtogroup I2C\r
+ * @{\r
+ */\r
+\r
+/* Exported types ------------------------------------------------------------*/\r
+\r
+/** \r
+ * @brief I2C Init structure definition \r
+ */\r
+\r
+typedef struct\r
+{\r
+ uint32_t I2C_ClockSpeed; /*!< Specifies the clock frequency.\r
+ This parameter must be set to a value lower than 400kHz */\r
+\r
+ uint16_t I2C_Mode; /*!< Specifies the I2C mode.\r
+ This parameter can be a value of @ref I2C_mode */\r
+\r
+ uint16_t I2C_DutyCycle; /*!< Specifies the I2C fast mode duty cycle.\r
+ This parameter can be a value of @ref I2C_duty_cycle_in_fast_mode */\r
+\r
+ uint16_t I2C_OwnAddress1; /*!< Specifies the first device own address.\r
+ This parameter can be a 7-bit or 10-bit address. */\r
+\r
+ uint16_t I2C_Ack; /*!< Enables or disables the acknowledgement.\r
+ This parameter can be a value of @ref I2C_acknowledgement */\r
+\r
+ uint16_t I2C_AcknowledgedAddress; /*!< Specifies if 7-bit or 10-bit address is acknowledged.\r
+ This parameter can be a value of @ref I2C_acknowledged_address */\r
+}I2C_InitTypeDef;\r
+\r
+/* Exported constants --------------------------------------------------------*/\r
+\r
+\r
+/** @defgroup I2C_Exported_Constants\r
+ * @{\r
+ */\r
+\r
+#define IS_I2C_ALL_PERIPH(PERIPH) (((PERIPH) == I2C1) || \\r
+ ((PERIPH) == I2C2))\r
+/** @defgroup I2C_mode \r
+ * @{\r
+ */\r
+\r
+#define I2C_Mode_I2C ((uint16_t)0x0000)\r
+#define I2C_Mode_SMBusDevice ((uint16_t)0x0002) \r
+#define I2C_Mode_SMBusHost ((uint16_t)0x000A)\r
+#define IS_I2C_MODE(MODE) (((MODE) == I2C_Mode_I2C) || \\r
+ ((MODE) == I2C_Mode_SMBusDevice) || \\r
+ ((MODE) == I2C_Mode_SMBusHost))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_duty_cycle_in_fast_mode \r
+ * @{\r
+ */\r
+\r
+#define I2C_DutyCycle_16_9 ((uint16_t)0x4000) /*!< I2C fast mode Tlow/Thigh = 16/9 */\r
+#define I2C_DutyCycle_2 ((uint16_t)0xBFFF) /*!< I2C fast mode Tlow/Thigh = 2 */\r
+#define IS_I2C_DUTY_CYCLE(CYCLE) (((CYCLE) == I2C_DutyCycle_16_9) || \\r
+ ((CYCLE) == I2C_DutyCycle_2))\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/** @defgroup I2C_acknowledgement\r
+ * @{\r
+ */\r
+\r
+#define I2C_Ack_Enable ((uint16_t)0x0400)\r
+#define I2C_Ack_Disable ((uint16_t)0x0000)\r
+#define IS_I2C_ACK_STATE(STATE) (((STATE) == I2C_Ack_Enable) || \\r
+ ((STATE) == I2C_Ack_Disable))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_transfer_direction \r
+ * @{\r
+ */\r
+\r
+#define I2C_Direction_Transmitter ((uint8_t)0x00)\r
+#define I2C_Direction_Receiver ((uint8_t)0x01)\r
+#define IS_I2C_DIRECTION(DIRECTION) (((DIRECTION) == I2C_Direction_Transmitter) || \\r
+ ((DIRECTION) == I2C_Direction_Receiver))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_acknowledged_address \r
+ * @{\r
+ */\r
+\r
+#define I2C_AcknowledgedAddress_7bit ((uint16_t)0x4000)\r
+#define I2C_AcknowledgedAddress_10bit ((uint16_t)0xC000)\r
+#define IS_I2C_ACKNOWLEDGE_ADDRESS(ADDRESS) (((ADDRESS) == I2C_AcknowledgedAddress_7bit) || \\r
+ ((ADDRESS) == I2C_AcknowledgedAddress_10bit))\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/** @defgroup I2C_registers \r
+ * @{\r
+ */\r
+\r
+#define I2C_Register_CR1 ((uint8_t)0x00)\r
+#define I2C_Register_CR2 ((uint8_t)0x04)\r
+#define I2C_Register_OAR1 ((uint8_t)0x08)\r
+#define I2C_Register_OAR2 ((uint8_t)0x0C)\r
+#define I2C_Register_DR ((uint8_t)0x10)\r
+#define I2C_Register_SR1 ((uint8_t)0x14)\r
+#define I2C_Register_SR2 ((uint8_t)0x18)\r
+#define I2C_Register_CCR ((uint8_t)0x1C)\r
+#define I2C_Register_TRISE ((uint8_t)0x20)\r
+#define IS_I2C_REGISTER(REGISTER) (((REGISTER) == I2C_Register_CR1) || \\r
+ ((REGISTER) == I2C_Register_CR2) || \\r
+ ((REGISTER) == I2C_Register_OAR1) || \\r
+ ((REGISTER) == I2C_Register_OAR2) || \\r
+ ((REGISTER) == I2C_Register_DR) || \\r
+ ((REGISTER) == I2C_Register_SR1) || \\r
+ ((REGISTER) == I2C_Register_SR2) || \\r
+ ((REGISTER) == I2C_Register_CCR) || \\r
+ ((REGISTER) == I2C_Register_TRISE))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_SMBus_alert_pin_level \r
+ * @{\r
+ */\r
+\r
+#define I2C_SMBusAlert_Low ((uint16_t)0x2000)\r
+#define I2C_SMBusAlert_High ((uint16_t)0xDFFF)\r
+#define IS_I2C_SMBUS_ALERT(ALERT) (((ALERT) == I2C_SMBusAlert_Low) || \\r
+ ((ALERT) == I2C_SMBusAlert_High))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_PEC_position \r
+ * @{\r
+ */\r
+\r
+#define I2C_PECPosition_Next ((uint16_t)0x0800)\r
+#define I2C_PECPosition_Current ((uint16_t)0xF7FF)\r
+#define IS_I2C_PEC_POSITION(POSITION) (((POSITION) == I2C_PECPosition_Next) || \\r
+ ((POSITION) == I2C_PECPosition_Current))\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/** @defgroup I2C_interrupts_definition \r
+ * @{\r
+ */\r
+\r
+#define I2C_IT_BUF ((uint16_t)0x0400)\r
+#define I2C_IT_EVT ((uint16_t)0x0200)\r
+#define I2C_IT_ERR ((uint16_t)0x0100)\r
+#define IS_I2C_CONFIG_IT(IT) ((((IT) & (uint16_t)0xF8FF) == 0x00) && ((IT) != 0x00))\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/** @defgroup I2C_interrupts_definition \r
+ * @{\r
+ */\r
+\r
+#define I2C_IT_SMBALERT ((uint32_t)0x01008000)\r
+#define I2C_IT_TIMEOUT ((uint32_t)0x01004000)\r
+#define I2C_IT_PECERR ((uint32_t)0x01001000)\r
+#define I2C_IT_OVR ((uint32_t)0x01000800)\r
+#define I2C_IT_AF ((uint32_t)0x01000400)\r
+#define I2C_IT_ARLO ((uint32_t)0x01000200)\r
+#define I2C_IT_BERR ((uint32_t)0x01000100)\r
+#define I2C_IT_TXE ((uint32_t)0x06000080)\r
+#define I2C_IT_RXNE ((uint32_t)0x06000040)\r
+#define I2C_IT_STOPF ((uint32_t)0x02000010)\r
+#define I2C_IT_ADD10 ((uint32_t)0x02000008)\r
+#define I2C_IT_BTF ((uint32_t)0x02000004)\r
+#define I2C_IT_ADDR ((uint32_t)0x02000002)\r
+#define I2C_IT_SB ((uint32_t)0x02000001)\r
+\r
+#define IS_I2C_CLEAR_IT(IT) ((((IT) & (uint16_t)0x20FF) == 0x00) && ((IT) != (uint16_t)0x00))\r
+\r
+#define IS_I2C_GET_IT(IT) (((IT) == I2C_IT_SMBALERT) || ((IT) == I2C_IT_TIMEOUT) || \\r
+ ((IT) == I2C_IT_PECERR) || ((IT) == I2C_IT_OVR) || \\r
+ ((IT) == I2C_IT_AF) || ((IT) == I2C_IT_ARLO) || \\r
+ ((IT) == I2C_IT_BERR) || ((IT) == I2C_IT_TXE) || \\r
+ ((IT) == I2C_IT_RXNE) || ((IT) == I2C_IT_STOPF) || \\r
+ ((IT) == I2C_IT_ADD10) || ((IT) == I2C_IT_BTF) || \\r
+ ((IT) == I2C_IT_ADDR) || ((IT) == I2C_IT_SB))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_flags_definition \r
+ * @{\r
+ */\r
+\r
+/** \r
+ * @brief SR2 register flags \r
+ */\r
+\r
+#define I2C_FLAG_DUALF ((uint32_t)0x00800000)\r
+#define I2C_FLAG_SMBHOST ((uint32_t)0x00400000)\r
+#define I2C_FLAG_SMBDEFAULT ((uint32_t)0x00200000)\r
+#define I2C_FLAG_GENCALL ((uint32_t)0x00100000)\r
+#define I2C_FLAG_TRA ((uint32_t)0x00040000)\r
+#define I2C_FLAG_BUSY ((uint32_t)0x00020000)\r
+#define I2C_FLAG_MSL ((uint32_t)0x00010000)\r
+\r
+/** \r
+ * @brief SR1 register flags \r
+ */\r
+\r
+#define I2C_FLAG_SMBALERT ((uint32_t)0x10008000)\r
+#define I2C_FLAG_TIMEOUT ((uint32_t)0x10004000)\r
+#define I2C_FLAG_PECERR ((uint32_t)0x10001000)\r
+#define I2C_FLAG_OVR ((uint32_t)0x10000800)\r
+#define I2C_FLAG_AF ((uint32_t)0x10000400)\r
+#define I2C_FLAG_ARLO ((uint32_t)0x10000200)\r
+#define I2C_FLAG_BERR ((uint32_t)0x10000100)\r
+#define I2C_FLAG_TXE ((uint32_t)0x10000080)\r
+#define I2C_FLAG_RXNE ((uint32_t)0x10000040)\r
+#define I2C_FLAG_STOPF ((uint32_t)0x10000010)\r
+#define I2C_FLAG_ADD10 ((uint32_t)0x10000008)\r
+#define I2C_FLAG_BTF ((uint32_t)0x10000004)\r
+#define I2C_FLAG_ADDR ((uint32_t)0x10000002)\r
+#define I2C_FLAG_SB ((uint32_t)0x10000001)\r
+\r
+#define IS_I2C_CLEAR_FLAG(FLAG) ((((FLAG) & (uint16_t)0x20FF) == 0x00) && ((FLAG) != (uint16_t)0x00))\r
+\r
+#define IS_I2C_GET_FLAG(FLAG) (((FLAG) == I2C_FLAG_DUALF) || ((FLAG) == I2C_FLAG_SMBHOST) || \\r
+ ((FLAG) == I2C_FLAG_SMBDEFAULT) || ((FLAG) == I2C_FLAG_GENCALL) || \\r
+ ((FLAG) == I2C_FLAG_TRA) || ((FLAG) == I2C_FLAG_BUSY) || \\r
+ ((FLAG) == I2C_FLAG_MSL) || ((FLAG) == I2C_FLAG_SMBALERT) || \\r
+ ((FLAG) == I2C_FLAG_TIMEOUT) || ((FLAG) == I2C_FLAG_PECERR) || \\r
+ ((FLAG) == I2C_FLAG_OVR) || ((FLAG) == I2C_FLAG_AF) || \\r
+ ((FLAG) == I2C_FLAG_ARLO) || ((FLAG) == I2C_FLAG_BERR) || \\r
+ ((FLAG) == I2C_FLAG_TXE) || ((FLAG) == I2C_FLAG_RXNE) || \\r
+ ((FLAG) == I2C_FLAG_STOPF) || ((FLAG) == I2C_FLAG_ADD10) || \\r
+ ((FLAG) == I2C_FLAG_BTF) || ((FLAG) == I2C_FLAG_ADDR) || \\r
+ ((FLAG) == I2C_FLAG_SB))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_Events \r
+ * @{\r
+ */\r
+\r
+/**\r
+ ===============================================================================\r
+ I2C Master Events (Events grouped in order of communication) \r
+ =============================================================================== \r
+ */\r
+\r
+/** \r
+ * @brief Communication start\r
+ * \r
+ * After sending the START condition (I2C_GenerateSTART() function) the master \r
+ * has to wait for this event. It means that the Start condition has been correctly \r
+ * released on the I2C bus (the bus is free, no other devices is communicating).\r
+ * \r
+ */\r
+/* --EV5 */\r
+#define I2C_EVENT_MASTER_MODE_SELECT ((uint32_t)0x00030001) /* BUSY, MSL and SB flag */\r
+\r
+/** \r
+ * @brief Address Acknowledge\r
+ * \r
+ * After checking on EV5 (start condition correctly released on the bus), the \r
+ * master sends the address of the slave(s) with which it will communicate \r
+ * (I2C_Send7bitAddress() function, it also determines the direction of the communication: \r
+ * Master transmitter or Receiver). Then the master has to wait that a slave acknowledges \r
+ * his address. If an acknowledge is sent on the bus, one of the following events will \r
+ * be set:\r
+ * \r
+ * 1) In case of Master Receiver (7-bit addressing): the I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED \r
+ * event is set.\r
+ * \r
+ * 2) In case of Master Transmitter (7-bit addressing): the I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED \r
+ * is set\r
+ * \r
+ * 3) In case of 10-Bit addressing mode, the master (just after generating the START \r
+ * and checking on EV5) has to send the header of 10-bit addressing mode (I2C_SendData() \r
+ * function). Then master should wait on EV9. It means that the 10-bit addressing \r
+ * header has been correctly sent on the bus. Then master should send the second part of \r
+ * the 10-bit address (LSB) using the function I2C_Send7bitAddress(). Then master \r
+ * should wait for event EV6. \r
+ * \r
+ */\r
+\r
+/* --EV6 */\r
+#define I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((uint32_t)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */\r
+#define I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ((uint32_t)0x00030002) /* BUSY, MSL and ADDR flags */\r
+/* --EV9 */\r
+#define I2C_EVENT_MASTER_MODE_ADDRESS10 ((uint32_t)0x00030008) /* BUSY, MSL and ADD10 flags */\r
+\r
+/** \r
+ * @brief Communication events\r
+ * \r
+ * If a communication is established (START condition generated and slave address \r
+ * acknowledged) then the master has to check on one of the following events for \r
+ * communication procedures:\r
+ * \r
+ * 1) Master Receiver mode: The master has to wait on the event EV7 then to read \r
+ * the data received from the slave (I2C_ReceiveData() function).\r
+ * \r
+ * 2) Master Transmitter mode: The master has to send data (I2C_SendData() \r
+ * function) then to wait on event EV8 or EV8_2.\r
+ * These two events are similar: \r
+ * - EV8 means that the data has been written in the data register and is \r
+ * being shifted out.\r
+ * - EV8_2 means that the data has been physically shifted out and output \r
+ * on the bus.\r
+ * In most cases, using EV8 is sufficient for the application.\r
+ * Using EV8_2 leads to a slower communication but ensure more reliable test.\r
+ * EV8_2 is also more suitable than EV8 for testing on the last data transmission \r
+ * (before Stop condition generation).\r
+ * \r
+ * @note In case the user software does not guarantee that this event EV7 is \r
+ * managed before the current byte end of transfer, then user may check on EV7 \r
+ * and BTF flag at the same time (ie. (I2C_EVENT_MASTER_BYTE_RECEIVED | I2C_FLAG_BTF)).\r
+ * In this case the communication may be slower.\r
+ * \r
+ */\r
+\r
+/* Master RECEIVER mode -----------------------------*/ \r
+/* --EV7 */\r
+#define I2C_EVENT_MASTER_BYTE_RECEIVED ((uint32_t)0x00030040) /* BUSY, MSL and RXNE flags */\r
+\r
+/* Master TRANSMITTER mode --------------------------*/\r
+/* --EV8 */\r
+#define I2C_EVENT_MASTER_BYTE_TRANSMITTING ((uint32_t)0x00070080) /* TRA, BUSY, MSL, TXE flags */\r
+/* --EV8_2 */\r
+#define I2C_EVENT_MASTER_BYTE_TRANSMITTED ((uint32_t)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */\r
+\r
+\r
+/**\r
+ ===============================================================================\r
+ I2C Slave Events (Events grouped in order of communication) \r
+ =============================================================================== \r
+ */\r
+\r
+\r
+/** \r
+ * @brief Communication start events\r
+ * \r
+ * Wait on one of these events at the start of the communication. It means that \r
+ * the I2C peripheral detected a Start condition on the bus (generated by master \r
+ * device) followed by the peripheral address. The peripheral generates an ACK \r
+ * condition on the bus (if the acknowledge feature is enabled through function \r
+ * I2C_AcknowledgeConfig()) and the events listed above are set :\r
+ * \r
+ * 1) In normal case (only one address managed by the slave), when the address \r
+ * sent by the master matches the own address of the peripheral (configured by \r
+ * I2C_OwnAddress1 field) the I2C_EVENT_SLAVE_XXX_ADDRESS_MATCHED event is set \r
+ * (where XXX could be TRANSMITTER or RECEIVER).\r
+ * \r
+ * 2) In case the address sent by the master matches the second address of the \r
+ * peripheral (configured by the function I2C_OwnAddress2Config() and enabled \r
+ * by the function I2C_DualAddressCmd()) the events I2C_EVENT_SLAVE_XXX_SECONDADDRESS_MATCHED \r
+ * (where XXX could be TRANSMITTER or RECEIVER) are set.\r
+ * \r
+ * 3) In case the address sent by the master is General Call (address 0x00) and \r
+ * if the General Call is enabled for the peripheral (using function I2C_GeneralCallCmd()) \r
+ * the following event is set I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED. \r
+ * \r
+ */\r
+\r
+/* --EV1 (all the events below are variants of EV1) */ \r
+/* 1) Case of One Single Address managed by the slave */\r
+#define I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((uint32_t)0x00020002) /* BUSY and ADDR flags */\r
+#define I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((uint32_t)0x00060082) /* TRA, BUSY, TXE and ADDR flags */\r
+\r
+/* 2) Case of Dual address managed by the slave */\r
+#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((uint32_t)0x00820000) /* DUALF and BUSY flags */\r
+#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860080) /* DUALF, TRA, BUSY and TXE flags */\r
+\r
+/* 3) Case of General Call enabled for the slave */\r
+#define I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((uint32_t)0x00120000) /* GENCALL and BUSY flags */\r
+\r
+/** \r
+ * @brief Communication events\r
+ * \r
+ * Wait on one of these events when EV1 has already been checked and: \r
+ * \r
+ * - Slave RECEIVER mode:\r
+ * - EV2: When the application is expecting a data byte to be received. \r
+ * - EV4: When the application is expecting the end of the communication: master \r
+ * sends a stop condition and data transmission is stopped.\r
+ * \r
+ * - Slave Transmitter mode:\r
+ * - EV3: When a byte has been transmitted by the slave and the application is expecting \r
+ * the end of the byte transmission. The two events I2C_EVENT_SLAVE_BYTE_TRANSMITTED and\r
+ * I2C_EVENT_SLAVE_BYTE_TRANSMITTING are similar. The second one can optionally be \r
+ * used when the user software doesn't guarantee the EV3 is managed before the\r
+ * current byte end of transfer.\r
+ * - EV3_2: When the master sends a NACK in order to tell slave that data transmission \r
+ * shall end (before sending the STOP condition). In this case slave has to stop sending \r
+ * data bytes and expect a Stop condition on the bus.\r
+ * \r
+ * @note In case the user software does not guarantee that the event EV2 is \r
+ * managed before the current byte end of transfer, then user may check on EV2 \r
+ * and BTF flag at the same time (ie. (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_BTF)).\r
+ * In this case the communication may be slower.\r
+ *\r
+ */\r
+\r
+/* Slave RECEIVER mode --------------------------*/ \r
+/* --EV2 */\r
+#define I2C_EVENT_SLAVE_BYTE_RECEIVED ((uint32_t)0x00020040) /* BUSY and RXNE flags */\r
+/* --EV4 */\r
+#define I2C_EVENT_SLAVE_STOP_DETECTED ((uint32_t)0x00000010) /* STOPF flag */\r
+\r
+/* Slave TRANSMITTER mode -----------------------*/\r
+/* --EV3 */\r
+#define I2C_EVENT_SLAVE_BYTE_TRANSMITTED ((uint32_t)0x00060084) /* TRA, BUSY, TXE and BTF flags */\r
+#define I2C_EVENT_SLAVE_BYTE_TRANSMITTING ((uint32_t)0x00060080) /* TRA, BUSY and TXE flags */\r
+/* --EV3_2 */\r
+#define I2C_EVENT_SLAVE_ACK_FAILURE ((uint32_t)0x00000400) /* AF flag */\r
+\r
+/**\r
+ ===============================================================================\r
+ End of Events Description \r
+ =============================================================================== \r
+ */\r
+\r
+#define IS_I2C_EVENT(EVENT) (((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_BYTE_RECEIVED) || \\r
+ ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF)) || \\r
+ ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL)) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_BYTE_TRANSMITTED) || \\r
+ ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF)) || \\r
+ ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL)) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_STOP_DETECTED) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_MODE_SELECT) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_BYTE_RECEIVED) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTED) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTING) || \\r
+ ((EVENT) == I2C_EVENT_MASTER_MODE_ADDRESS10) || \\r
+ ((EVENT) == I2C_EVENT_SLAVE_ACK_FAILURE))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_own_address1 \r
+ * @{\r
+ */\r
+\r
+#define IS_I2C_OWN_ADDRESS1(ADDRESS1) ((ADDRESS1) <= 0x3FF)\r
+/**\r
+ * @}\r
+ */\r
+\r
+/** @defgroup I2C_clock_speed \r
+ * @{\r
+ */\r
+\r
+#define IS_I2C_CLOCK_SPEED(SPEED) (((SPEED) >= 0x1) && ((SPEED) <= 400000))\r
+/**\r
+ * @}\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/* Exported macro ------------------------------------------------------------*/\r
+/* Exported functions ------------------------------------------------------- */\r
+\r
+/* Function used to set the I2C configuration to the default reset state *****/\r
+void I2C_DeInit(I2C_TypeDef* I2Cx);\r
+\r
+/* Initialization and Configuration functions *********************************/\r
+void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct);\r
+void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct);\r
+void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address);\r
+void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, uint16_t I2C_SMBusAlert);\r
+void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, uint16_t I2C_DutyCycle);\r
+void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction);\r
+\r
+/* Data transfers functions ***************************************************/ \r
+void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data);\r
+uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx);\r
+\r
+/* PEC management functions ***************************************************/ \r
+void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_PECPosition);\r
+void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx);\r
+\r
+/* DMA transfers management functions *****************************************/\r
+void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);\r
+\r
+\r
+/* Interrupts, events and flags management functions **************************/\r
+uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register);\r
+void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t I2C_IT, FunctionalState NewState);\r
+\r
+/**\r
+ * @brief\r
+ * \r
+@verbatim \r
+ ===============================================================================\r
+ I2C State Monitoring Functions \r
+ =============================================================================== \r
+ This I2C driver provides three different ways for I2C state monitoring\r
+ depending on the application requirements and constraints:\r
+ \r
+ \r
+ 1. Basic state monitoring (Using I2C_CheckEvent() function)\r
+ -----------------------------------------------------------\r
+ It compares the status registers (SR1 and SR2) content to a given event\r
+ (can be the combination of one or more flags).\r
+ It returns SUCCESS if the current status includes the given flags \r
+ and returns ERROR if one or more flags are missing in the current status.\r
+\r
+ - When to use\r
+ - This function is suitable for most applications as well as for startup \r
+ activity since the events are fully described in the product reference \r
+ manual (RM0038).\r
+ - It is also suitable for users who need to define their own events.\r
+\r
+ - Limitations\r
+ - If an error occurs (ie. error flags are set besides to the monitored \r
+ flags), the I2C_CheckEvent() function may return SUCCESS despite \r
+ the communication hold or corrupted real state. \r
+ In this case, it is advised to use error interrupts to monitor \r
+ the error events and handle them in the interrupt IRQ handler.\r
+ \r
+ @note \r
+ For error management, it is advised to use the following functions:\r
+ - I2C_ITConfig() to configure and enable the error interrupts (I2C_IT_ERR).\r
+ - I2Cx_ER_IRQHandler() which is called when the error interrupt occurs.\r
+ Where x is the peripheral instance (I2C1, I2C2 ...)\r
+ - I2C_GetFlagStatus() or I2C_GetITStatus() to be called into the \r
+ I2Cx_ER_IRQHandler() function in order to determine which error occurred.\r
+ - I2C_ClearFlag() or I2C_ClearITPendingBit() and/or I2C_SoftwareResetCmd() \r
+ and/or I2C_GenerateStop() in order to clear the error flag and source \r
+ and return to correct communciation status.\r
+ \r
+ \r
+ 2. Advanced state monitoring (Using the function I2C_GetLastEvent())\r
+ -------------------------------------------------------------------- \r
+ Using the function I2C_GetLastEvent() which returns the image of both status \r
+ registers in a single word (uint32_t) (Status Register 2 value is shifted left \r
+ by 16 bits and concatenated to Status Register 1).\r
+\r
+ - When to use\r
+ - This function is suitable for the same applications above but it \r
+ allows to overcome the mentioned limitation of I2C_GetFlagStatus() \r
+ function.\r
+ - The returned value could be compared to events already defined in \r
+ the library (stm32l1xx_i2c.h) or to custom values defined by user.\r
+ This function is suitable when multiple flags are monitored at the \r
+ same time.\r
+ - At the opposite of I2C_CheckEvent() function, this function allows \r
+ user to choose when an event is accepted (when all events flags are \r
+ set and no other flags are set or just when the needed flags are set \r
+ like I2C_CheckEvent() function.\r
+\r
+ - Limitations\r
+ - User may need to define his own events.\r
+ - Same remark concerning the error management is applicable for this \r
+ function if user decides to check only regular communication flags \r
+ (and ignores error flags).\r
+ \r
+ \r
+ 3. Flag-based state monitoring (Using the function I2C_GetFlagStatus())\r
+ -----------------------------------------------------------------------\r
+ \r
+ Using the function I2C_GetFlagStatus() which simply returns the status of \r
+ one single flag (ie. I2C_FLAG_RXNE ...). \r
+\r
+ - When to use\r
+ - This function could be used for specific applications or in debug \r
+ phase.\r
+ - It is suitable when only one flag checking is needed (most I2C \r
+ events are monitored through multiple flags).\r
+ - Limitations: \r
+ - When calling this function, the Status register is accessed. \r
+ Some flags are cleared when the status register is accessed. \r
+ So checking the status of one Flag, may clear other ones.\r
+ - Function may need to be called twice or more in order to monitor \r
+ one single event.\r
+ \r
+ For detailed description of Events, please refer to section I2C_Events in \r
+ stm32l1xx_i2c.h file.\r
+ \r
+@endverbatim\r
+ * \r
+ */\r
+\r
+/**\r
+ ===============================================================================\r
+ 1. Basic state monitoring \r
+ =============================================================================== \r
+ */\r
+ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT);\r
+/**\r
+ ===============================================================================\r
+ 2. Advanced state monitoring \r
+ =============================================================================== \r
+ */\r
+uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx);\r
+/**\r
+ ===============================================================================\r
+ 3. Flag-based state monitoring \r
+ =============================================================================== \r
+ */\r
+FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);\r
+\r
+\r
+void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);\r
+ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT);\r
+void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT);\r
+\r
+#ifdef __cplusplus\r
+}\r
+#endif\r
+\r
+#endif /*__STM32L1xx_I2C_H */\r
+\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/**\r
+ * @}\r
+ */ \r
+\r
+/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/\r
projects / fw / stlink / blobdiff