From 289492ca9308f74333835e93ec1338d9ce927773 Mon Sep 17 00:00:00 2001 From: richardbarry Date: Thu, 23 Dec 2010 17:10:24 +0000 Subject: [PATCH] Added two missing STM32 peripheral drivers from the STM32L152 demo project. git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@1185 1d2547de-c912-0410-9cb9-b8ca96c0e9e2 --- .../inc/stm32l1xx_i2c.h | 670 ++++++++++++++++++ .../src/stm32l1xx_spi.c | 641 +++++++++++++++++ 2 files changed, 1311 insertions(+) create mode 100644 Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/inc/stm32l1xx_i2c.h create mode 100644 Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/src/stm32l1xx_spi.c diff --git a/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/inc/stm32l1xx_i2c.h b/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/inc/stm32l1xx_i2c.h new file mode 100644 index 000000000..d4d29972d --- /dev/null +++ b/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/inc/stm32l1xx_i2c.h @@ -0,0 +1,670 @@ +/** + ****************************************************************************** + * @file stm32l1xx_i2c.h + * @author MCD Application Team + * @version V1.0.0RC1 + * @date 07/02/2010 + * @brief This file contains all the functions prototypes for the I2C firmware + * library. + ****************************************************************************** + * @copy + * + * 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. + * + *

© COPYRIGHT 2010 STMicroelectronics

+ */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __STM32L1xx_I2C_H +#define __STM32L1xx_I2C_H + +#ifdef __cplusplus + extern "C" { +#endif + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l1xx.h" + +/** @addtogroup STM32L1xx_StdPeriph_Driver + * @{ + */ + +/** @addtogroup I2C + * @{ + */ + +/** @defgroup I2C_Exported_Types + * @{ + */ + +/** + * @brief I2C Init structure definition + */ + +typedef struct +{ + uint32_t I2C_ClockSpeed; /*!< Specifies the clock frequency. + This parameter must be set to a value lower than 400kHz */ + + uint16_t I2C_Mode; /*!< Specifies the I2C mode. + This parameter can be a value of @ref I2C_mode */ + + uint16_t I2C_DutyCycle; /*!< Specifies the I2C fast mode duty cycle. + This parameter can be a value of @ref I2C_duty_cycle_in_fast_mode */ + + uint16_t I2C_OwnAddress1; /*!< Specifies the first device own address. + This parameter can be a 7-bit or 10-bit address. */ + + uint16_t I2C_Ack; /*!< Enables or disables the acknowledgement. + This parameter can be a value of @ref I2C_acknowledgement */ + + uint16_t I2C_AcknowledgedAddress; /*!< Specifies if 7-bit or 10-bit address is acknowledged. + This parameter can be a value of @ref I2C_acknowledged_address */ +}I2C_InitTypeDef; + +/** + * @} + */ + + +/** @defgroup I2C_Exported_Constants + * @{ + */ + +#define IS_I2C_ALL_PERIPH(PERIPH) (((PERIPH) == I2C1) || \ + ((PERIPH) == I2C2)) +/** @defgroup I2C_mode + * @{ + */ + +#define I2C_Mode_I2C ((uint16_t)0x0000) +#define I2C_Mode_SMBusDevice ((uint16_t)0x0002) +#define I2C_Mode_SMBusHost ((uint16_t)0x000A) +#define IS_I2C_MODE(MODE) (((MODE) == I2C_Mode_I2C) || \ + ((MODE) == I2C_Mode_SMBusDevice) || \ + ((MODE) == I2C_Mode_SMBusHost)) +/** + * @} + */ + +/** @defgroup I2C_duty_cycle_in_fast_mode + * @{ + */ + +#define I2C_DutyCycle_16_9 ((uint16_t)0x4000) /*!< I2C fast mode Tlow/Thigh = 16/9 */ +#define I2C_DutyCycle_2 ((uint16_t)0xBFFF) /*!< I2C fast mode Tlow/Thigh = 2 */ +#define IS_I2C_DUTY_CYCLE(CYCLE) (((CYCLE) == I2C_DutyCycle_16_9) || \ + ((CYCLE) == I2C_DutyCycle_2)) +/** + * @} + */ + +/** @defgroup I2C_acknowledgement + * @{ + */ + +#define I2C_Ack_Enable ((uint16_t)0x0400) +#define I2C_Ack_Disable ((uint16_t)0x0000) +#define IS_I2C_ACK_STATE(STATE) (((STATE) == I2C_Ack_Enable) || \ + ((STATE) == I2C_Ack_Disable)) +/** + * @} + */ + +/** @defgroup I2C_transfer_direction + * @{ + */ + +#define I2C_Direction_Transmitter ((uint8_t)0x00) +#define I2C_Direction_Receiver ((uint8_t)0x01) +#define IS_I2C_DIRECTION(DIRECTION) (((DIRECTION) == I2C_Direction_Transmitter) || \ + ((DIRECTION) == I2C_Direction_Receiver)) +/** + * @} + */ + +/** @defgroup I2C_acknowledged_address + * @{ + */ + +#define I2C_AcknowledgedAddress_7bit ((uint16_t)0x4000) +#define I2C_AcknowledgedAddress_10bit ((uint16_t)0xC000) +#define IS_I2C_ACKNOWLEDGE_ADDRESS(ADDRESS) (((ADDRESS) == I2C_AcknowledgedAddress_7bit) || \ + ((ADDRESS) == I2C_AcknowledgedAddress_10bit)) +/** + * @} + */ + +/** @defgroup I2C_registers + * @{ + */ + +#define I2C_Register_CR1 ((uint8_t)0x00) +#define I2C_Register_CR2 ((uint8_t)0x04) +#define I2C_Register_OAR1 ((uint8_t)0x08) +#define I2C_Register_OAR2 ((uint8_t)0x0C) +#define I2C_Register_DR ((uint8_t)0x10) +#define I2C_Register_SR1 ((uint8_t)0x14) +#define I2C_Register_SR2 ((uint8_t)0x18) +#define I2C_Register_CCR ((uint8_t)0x1C) +#define I2C_Register_TRISE ((uint8_t)0x20) +#define IS_I2C_REGISTER(REGISTER) (((REGISTER) == I2C_Register_CR1) || \ + ((REGISTER) == I2C_Register_CR2) || \ + ((REGISTER) == I2C_Register_OAR1) || \ + ((REGISTER) == I2C_Register_OAR2) || \ + ((REGISTER) == I2C_Register_DR) || \ + ((REGISTER) == I2C_Register_SR1) || \ + ((REGISTER) == I2C_Register_SR2) || \ + ((REGISTER) == I2C_Register_CCR) || \ + ((REGISTER) == I2C_Register_TRISE)) +/** + * @} + */ + +/** @defgroup I2C_SMBus_alert_pin_level + * @{ + */ + +#define I2C_SMBusAlert_Low ((uint16_t)0x2000) +#define I2C_SMBusAlert_High ((uint16_t)0xDFFF) +#define IS_I2C_SMBUS_ALERT(ALERT) (((ALERT) == I2C_SMBusAlert_Low) || \ + ((ALERT) == I2C_SMBusAlert_High)) +/** + * @} + */ + +/** @defgroup I2C_PEC_position + * @{ + */ + +#define I2C_PECPosition_Next ((uint16_t)0x0800) +#define I2C_PECPosition_Current ((uint16_t)0xF7FF) +#define IS_I2C_PEC_POSITION(POSITION) (((POSITION) == I2C_PECPosition_Next) || \ + ((POSITION) == I2C_PECPosition_Current)) +/** + * @} + */ + +/** @defgroup I2C_interrupts_definition + * @{ + */ + +#define I2C_IT_BUF ((uint16_t)0x0400) +#define I2C_IT_EVT ((uint16_t)0x0200) +#define I2C_IT_ERR ((uint16_t)0x0100) +#define IS_I2C_CONFIG_IT(IT) ((((IT) & (uint16_t)0xF8FF) == 0x00) && ((IT) != 0x00)) +/** + * @} + */ + +/** @defgroup I2C_interrupts_definition + * @{ + */ + +#define I2C_IT_SMBALERT ((uint32_t)0x01008000) +#define I2C_IT_TIMEOUT ((uint32_t)0x01004000) +#define I2C_IT_PECERR ((uint32_t)0x01001000) +#define I2C_IT_OVR ((uint32_t)0x01000800) +#define I2C_IT_AF ((uint32_t)0x01000400) +#define I2C_IT_ARLO ((uint32_t)0x01000200) +#define I2C_IT_BERR ((uint32_t)0x01000100) +#define I2C_IT_TXE ((uint32_t)0x06000080) +#define I2C_IT_RXNE ((uint32_t)0x06000040) +#define I2C_IT_STOPF ((uint32_t)0x02000010) +#define I2C_IT_ADD10 ((uint32_t)0x02000008) +#define I2C_IT_BTF ((uint32_t)0x02000004) +#define I2C_IT_ADDR ((uint32_t)0x02000002) +#define I2C_IT_SB ((uint32_t)0x02000001) + +#define IS_I2C_CLEAR_IT(IT) ((((IT) & (uint16_t)0x20FF) == 0x00) && ((IT) != (uint16_t)0x00)) + +#define IS_I2C_GET_IT(IT) (((IT) == I2C_IT_SMBALERT) || ((IT) == I2C_IT_TIMEOUT) || \ + ((IT) == I2C_IT_PECERR) || ((IT) == I2C_IT_OVR) || \ + ((IT) == I2C_IT_AF) || ((IT) == I2C_IT_ARLO) || \ + ((IT) == I2C_IT_BERR) || ((IT) == I2C_IT_TXE) || \ + ((IT) == I2C_IT_RXNE) || ((IT) == I2C_IT_STOPF) || \ + ((IT) == I2C_IT_ADD10) || ((IT) == I2C_IT_BTF) || \ + ((IT) == I2C_IT_ADDR) || ((IT) == I2C_IT_SB)) +/** + * @} + */ + +/** @defgroup I2C_flags_definition + * @{ + */ + +/** + * @brief SR2 register flags + */ + +#define I2C_FLAG_DUALF ((uint32_t)0x00800000) +#define I2C_FLAG_SMBHOST ((uint32_t)0x00400000) +#define I2C_FLAG_SMBDEFAULT ((uint32_t)0x00200000) +#define I2C_FLAG_GENCALL ((uint32_t)0x00100000) +#define I2C_FLAG_TRA ((uint32_t)0x00040000) +#define I2C_FLAG_BUSY ((uint32_t)0x00020000) +#define I2C_FLAG_MSL ((uint32_t)0x00010000) + +/** + * @brief SR1 register flags + */ + +#define I2C_FLAG_SMBALERT ((uint32_t)0x10008000) +#define I2C_FLAG_TIMEOUT ((uint32_t)0x10004000) +#define I2C_FLAG_PECERR ((uint32_t)0x10001000) +#define I2C_FLAG_OVR ((uint32_t)0x10000800) +#define I2C_FLAG_AF ((uint32_t)0x10000400) +#define I2C_FLAG_ARLO ((uint32_t)0x10000200) +#define I2C_FLAG_BERR ((uint32_t)0x10000100) +#define I2C_FLAG_TXE ((uint32_t)0x10000080) +#define I2C_FLAG_RXNE ((uint32_t)0x10000040) +#define I2C_FLAG_STOPF ((uint32_t)0x10000010) +#define I2C_FLAG_ADD10 ((uint32_t)0x10000008) +#define I2C_FLAG_BTF ((uint32_t)0x10000004) +#define I2C_FLAG_ADDR ((uint32_t)0x10000002) +#define I2C_FLAG_SB ((uint32_t)0x10000001) + +#define IS_I2C_CLEAR_FLAG(FLAG) ((((FLAG) & (uint16_t)0x20FF) == 0x00) && ((FLAG) != (uint16_t)0x00)) + +#define IS_I2C_GET_FLAG(FLAG) (((FLAG) == I2C_FLAG_DUALF) || ((FLAG) == I2C_FLAG_SMBHOST) || \ + ((FLAG) == I2C_FLAG_SMBDEFAULT) || ((FLAG) == I2C_FLAG_GENCALL) || \ + ((FLAG) == I2C_FLAG_TRA) || ((FLAG) == I2C_FLAG_BUSY) || \ + ((FLAG) == I2C_FLAG_MSL) || ((FLAG) == I2C_FLAG_SMBALERT) || \ + ((FLAG) == I2C_FLAG_TIMEOUT) || ((FLAG) == I2C_FLAG_PECERR) || \ + ((FLAG) == I2C_FLAG_OVR) || ((FLAG) == I2C_FLAG_AF) || \ + ((FLAG) == I2C_FLAG_ARLO) || ((FLAG) == I2C_FLAG_BERR) || \ + ((FLAG) == I2C_FLAG_TXE) || ((FLAG) == I2C_FLAG_RXNE) || \ + ((FLAG) == I2C_FLAG_STOPF) || ((FLAG) == I2C_FLAG_ADD10) || \ + ((FLAG) == I2C_FLAG_BTF) || ((FLAG) == I2C_FLAG_ADDR) || \ + ((FLAG) == I2C_FLAG_SB)) +/** + * @} + */ + +/** @defgroup I2C_Events + * @{ + */ + +/*======================================== + + I2C Master Events (Events grouped in order of communication) + ==========================================*/ +/** + * @brief Communication start + * + * After sending the START condition (I2C_GenerateSTART() function) the master + * has to wait for this event. It means that the Start condition has been correctly + * released on the I2C bus (the bus is free, no other devices is communicating). + * + */ +/* --EV5 */ +#define I2C_EVENT_MASTER_MODE_SELECT ((uint32_t)0x00030001) /* BUSY, MSL and SB flag */ + +/** + * @brief Address Acknowledge + * + * After checking on EV5 (start condition correctly released on the bus), the + * master sends the address of the slave(s) with which it will communicate + * (I2C_Send7bitAddress() function, it also determines the direction of the communication: + * Master transmitter or Receiver). Then the master has to wait that a slave acknowledges + * his address. If an acknowledge is sent on the bus, one of the following events will + * be set: + * + * 1) In case of Master Receiver (7-bit addressing): the I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED + * event is set. + * + * 2) In case of Master Transmitter (7-bit addressing): the I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED + * is set + * + * 3) In case of 10-Bit addressing mode, the master (just after generating the START + * and checking on EV5) has to send the header of 10-bit addressing mode (I2C_SendData() + * function). Then master should wait on EV9. It means that the 10-bit addressing + * header has been correctly sent on the bus. Then master should send the second part of + * the 10-bit address (LSB) using the function I2C_Send7bitAddress(). Then master + * should wait for event EV6. + * + */ + +/* --EV6 */ +#define I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((uint32_t)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */ +#define I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ((uint32_t)0x00030002) /* BUSY, MSL and ADDR flags */ +/* --EV9 */ +#define I2C_EVENT_MASTER_MODE_ADDRESS10 ((uint32_t)0x00030008) /* BUSY, MSL and ADD10 flags */ + +/** + * @brief Communication events + * + * If a communication is established (START condition generated and slave address + * acknowledged) then the master has to check on one of the following events for + * communication procedures: + * + * 1) Master Receiver mode: The master has to wait on the event EV7 then to read + * the data received from the slave (I2C_ReceiveData() function). + * + * 2) Master Transmitter mode: The master has to send data (I2C_SendData() + * function) then to wait on event EV8 or EV8_2. + * These two events are similar: + * - EV8 means that the data has been written in the data register and is + * being shifted out. + * - EV8_2 means that the data has been physically shifted out and output + * on the bus. + * In most cases, using EV8 is sufficient for the application. + * Using EV8_2 leads to a slower communication but ensure more reliable test. + * EV8_2 is also more suitable than EV8 for testing on the last data transmission + * (before Stop condition generation). + * + * @note In case the user software does not guarantee that this event EV7 is + * managed before the current byte end of transfer, then user may check on EV7 + * and BTF flag at the same time (ie. (I2C_EVENT_MASTER_BYTE_RECEIVED | I2C_FLAG_BTF)). + * In this case the communication may be slower. + * + */ + +/* Master RECEIVER mode -----------------------------*/ +/* --EV7 */ +#define I2C_EVENT_MASTER_BYTE_RECEIVED ((uint32_t)0x00030040) /* BUSY, MSL and RXNE flags */ + +/* Master TRANSMITTER mode --------------------------*/ +/* --EV8 */ +#define I2C_EVENT_MASTER_BYTE_TRANSMITTING ((uint32_t)0x00070080) /* TRA, BUSY, MSL, TXE flags */ +/* --EV8_2 */ +#define I2C_EVENT_MASTER_BYTE_TRANSMITTED ((uint32_t)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */ + + +/*======================================== + + I2C Slave Events (Events grouped in order of communication) + ==========================================*/ + +/** + * @brief Communication start events + * + * Wait on one of these events at the start of the communication. It means that + * the I2C peripheral detected a Start condition on the bus (generated by master + * device) followed by the peripheral address. The peripheral generates an ACK + * condition on the bus (if the acknowledge feature is enabled through function + * I2C_AcknowledgeConfig()) and the events listed above are set : + * + * 1) In normal case (only one address managed by the slave), when the address + * sent by the master matches the own address of the peripheral (configured by + * I2C_OwnAddress1 field) the I2C_EVENT_SLAVE_XXX_ADDRESS_MATCHED event is set + * (where XXX could be TRANSMITTER or RECEIVER). + * + * 2) In case the address sent by the master matches the second address of the + * peripheral (configured by the function I2C_OwnAddress2Config() and enabled + * by the function I2C_DualAddressCmd()) the events I2C_EVENT_SLAVE_XXX_SECONDADDRESS_MATCHED + * (where XXX could be TRANSMITTER or RECEIVER) are set. + * + * 3) In case the address sent by the master is General Call (address 0x00) and + * if the General Call is enabled for the peripheral (using function I2C_GeneralCallCmd()) + * the following event is set I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED. + * + */ + +/* --EV1 (all the events below are variants of EV1) */ +/* 1) Case of One Single Address managed by the slave */ +#define I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((uint32_t)0x00020002) /* BUSY and ADDR flags */ +#define I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((uint32_t)0x00060082) /* TRA, BUSY, TXE and ADDR flags */ + +/* 2) Case of Dual address managed by the slave */ +#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((uint32_t)0x00820000) /* DUALF and BUSY flags */ +#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860080) /* DUALF, TRA, BUSY and TXE flags */ + +/* 3) Case of General Call enabled for the slave */ +#define I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((uint32_t)0x00120000) /* GENCALL and BUSY flags */ + +/** + * @brief Communication events + * + * Wait on one of these events when EV1 has already been checked and: + * + * - Slave RECEIVER mode: + * - EV2: When the application is expecting a data byte to be received. + * - EV4: When the application is expecting the end of the communication: master + * sends a stop condition and data transmission is stopped. + * + * - Slave Transmitter mode: + * - EV3: When a byte has been transmitted by the slave and the application is expecting + * the end of the byte transmission. The two events I2C_EVENT_SLAVE_BYTE_TRANSMITTED and + * I2C_EVENT_SLAVE_BYTE_TRANSMITTING are similar. The second one can optionally be + * used when the user software doesn't guarantee the EV3 is managed before the + * current byte end of tranfer. + * - EV3_2: When the master sends a NACK in order to tell slave that data transmission + * shall end (before sending the STOP condition). In this case slave has to stop sending + * data bytes and expect a Stop condition on the bus. + * + * @note In case the user software does not guarantee that the event EV2 is + * managed before the current byte end of transfer, then user may check on EV2 + * and BTF flag at the same time (ie. (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_BTF)). + * In this case the communication may be slower. + * + */ + +/* Slave RECEIVER mode --------------------------*/ +/* --EV2 */ +#define I2C_EVENT_SLAVE_BYTE_RECEIVED ((uint32_t)0x00020040) /* BUSY and RXNE flags */ +/* --EV4 */ +#define I2C_EVENT_SLAVE_STOP_DETECTED ((uint32_t)0x00000010) /* STOPF flag */ + +/* Slave TRANSMITTER mode -----------------------*/ +/* --EV3 */ +#define I2C_EVENT_SLAVE_BYTE_TRANSMITTED ((uint32_t)0x00060084) /* TRA, BUSY, TXE and BTF flags */ +#define I2C_EVENT_SLAVE_BYTE_TRANSMITTING ((uint32_t)0x00060080) /* TRA, BUSY and TXE flags */ +/* --EV3_2 */ +#define I2C_EVENT_SLAVE_ACK_FAILURE ((uint32_t)0x00000400) /* AF flag */ + +/*=========================== End of Events Description ==========================================*/ + +#define IS_I2C_EVENT(EVENT) (((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED) || \ + ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED) || \ + ((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED) || \ + ((EVENT) == I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED) || \ + ((EVENT) == I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED) || \ + ((EVENT) == I2C_EVENT_SLAVE_BYTE_RECEIVED) || \ + ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF)) || \ + ((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL)) || \ + ((EVENT) == I2C_EVENT_SLAVE_BYTE_TRANSMITTED) || \ + ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF)) || \ + ((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL)) || \ + ((EVENT) == I2C_EVENT_SLAVE_STOP_DETECTED) || \ + ((EVENT) == I2C_EVENT_MASTER_MODE_SELECT) || \ + ((EVENT) == I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) || \ + ((EVENT) == I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) || \ + ((EVENT) == I2C_EVENT_MASTER_BYTE_RECEIVED) || \ + ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTED) || \ + ((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTING) || \ + ((EVENT) == I2C_EVENT_MASTER_MODE_ADDRESS10) || \ + ((EVENT) == I2C_EVENT_SLAVE_ACK_FAILURE)) +/** + * @} + */ + +/** @defgroup I2C_own_address1 + * @{ + */ + +#define IS_I2C_OWN_ADDRESS1(ADDRESS1) ((ADDRESS1) <= 0x3FF) +/** + * @} + */ + +/** @defgroup I2C_clock_speed + * @{ + */ + +#define IS_I2C_CLOCK_SPEED(SPEED) (((SPEED) >= 0x1) && ((SPEED) <= 400000)) +/** + * @} + */ + +/** + * @} + */ + +/** @defgroup I2C_Exported_Macros + * @{ + */ + +/** + * @} + */ + +/** @defgroup I2C_Exported_Functions + * @{ + */ + +void I2C_DeInit(I2C_TypeDef* I2Cx); +void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct); +void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct); +void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address); +void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t I2C_IT, FunctionalState NewState); +void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data); +uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx); +void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction); +uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register); +void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, uint16_t I2C_SMBusAlert); +void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_PECPosition); +void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState); +uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx); +void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState); +void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, uint16_t I2C_DutyCycle); + +/** + * @brief + **************************************************************************************** + * + * I2C State Monitoring Functions + * + **************************************************************************************** + * This I2C driver provides three different ways for I2C state monitoring + * depending on the application requirements and constraints: + * + * + * 1) Basic state monitoring: + * Using I2C_CheckEvent() function: + * It compares the status registers (SR1 and SR2) content to a given event + * (can be the combination of one or more flags). + * It returns SUCCESS if the current status includes the given flags + * and returns ERROR if one or more flags are missing in the current status. + * - When to use: + * - This function is suitable for most applications as well as for startup + * activity since the events are fully described in the product reference manual + * (RM0008). + * - It is also suitable for users who need to define their own events. + * - Limitations: + * - If an error occurs (ie. error flags are set besides to the monitored flags), + * the I2C_CheckEvent() function may return SUCCESS despite the communication + * hold or corrupted real state. + * In this case, it is advised to use error interrupts to monitor the error + * events and handle them in the interrupt IRQ handler. + * + * @note + * For error management, it is advised to use the following functions: + * - I2C_ITConfig() to configure and enable the error interrupts (I2C_IT_ERR). + * - I2Cx_ER_IRQHandler() which is called when the error interurpt occurs. + * Where x is the peripheral instance (I2C1, I2C2 ...) + * - I2C_GetFlagStatus() or I2C_GetITStatus() to be called into the I2Cx_ER_IRQHandler() function + * in order to determine which error occured. + * - I2C_ClearFlag() or I2C_ClearITPendingBit() and/or I2C_SoftwareResetCmd() and/or I2C_GenerateStop() + * in order to clear the error flag and source and return to correct + * communication status. + * + * + * 2) Advanced state monitoring: + * Using the function I2C_GetLastEvent() which returns the image of both status + * registers in a single word (uint32_t) (Status Register 2 value is shifted left + * by 16 bits and concatenated to Status Register 1). + * - When to use: + * - This function is suitable for the same applications above but it allows to + * overcome the limitations of I2C_GetFlagStatus() function (see below). + * The returned value could be compared to events already defined in the + * library (stm32f10x_i2c.h) or to custom values defined by user. + * - This function is suitable when multiple flags are monitored at the same time. + * - At the opposite of I2C_CheckEvent() function, this function allows user to + * choose when an event is accepted (when all events flags are set and no + * other flags are set or just when the needed flags are set like + * I2C_CheckEvent() function). + * - Limitations: + * - User may need to define his own events. + * - Same remark concerning the error management is applicable for this + * function if user decides to check only regular communication flags (and + * ignores error flags). + * + * + * 3) Flag-based state monitoring: + * Using the function I2C_GetFlagStatus() which simply returns the status of + * one single flag (ie. I2C_FLAG_RXNE ...). + * - When to use: + * - This function could be used for specific applications or in debug phase. + * - It is suitable when only one flag checking is needed (most I2C events + * are monitored through multiple flags). + * - Limitations: + * - When calling this function, the Status register is accessed. Some flags are + * cleared when the status register is accessed. So checking the status + * of one Flag, may clear other ones. + * - Function may need to be called twice or more in order to monitor one + * single event. + * + */ + +/** + * + * 1) Basic state monitoring + ******************************************************************************* + */ +ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT); +/** + * + * 2) Advanced state monitoring + ******************************************************************************* + */ +uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx); +/** + * + * 3) Flag-based state monitoring + ******************************************************************************* + */ +FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG); +/** + * + ******************************************************************************* + */ + +void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG); +ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT); +void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT); + +#ifdef __cplusplus +} +#endif + +#endif /*__STM32L1xx_I2C_H */ +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/ diff --git a/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/src/stm32l1xx_spi.c b/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/src/stm32l1xx_spi.c new file mode 100644 index 000000000..67e4b386e --- /dev/null +++ b/Demo/Cortex_STM32L152_IAR/system_and_ST_code/STM32L1xx_StdPeriph_Driver/src/stm32l1xx_spi.c @@ -0,0 +1,641 @@ +/** + ****************************************************************************** + * @file stm32l1xx_spi.c + * @author MCD Application Team + * @version V1.0.0RC1 + * @date 07/02/2010 + * @brief This file provides all the SPI firmware functions. + ****************************************************************************** + * @copy + * + * 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. + * + *

© COPYRIGHT 2010 STMicroelectronics

+ */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l1xx_spi.h" +#include "stm32l1xx_rcc.h" + +/** @addtogroup STM32L1xx_StdPeriph_Driver + * @{ + */ + +/** @defgroup SPI + * @brief SPI driver modules + * @{ + */ + +/** @defgroup SPI_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + + +/** @defgroup SPI_Private_Defines + * @{ + */ + +/* SPI registers Masks */ +#define CR1_CLEAR_MASK ((uint16_t)0x3040) + +/** + * @} + */ + +/** @defgroup SPI_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @defgroup SPI_Private_Variables + * @{ + */ + +/** + * @} + */ + +/** @defgroup SPI_Private_FunctionPrototypes + * @{ + */ + +/** + * @} + */ + +/** @defgroup SPI_Private_Functions + * @{ + */ + +/** + * @brief Deinitializes the SPIx peripheral registers to their default + * reset values. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @retval None + */ +void SPI_DeInit(SPI_TypeDef* SPIx) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + if (SPIx == SPI1) + { + /* Enable SPI1 reset state */ + RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, ENABLE); + /* Release SPI1 from reset state */ + RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1, DISABLE); + } + else + { + if (SPIx == SPI2) + { + /* Enable SPI2 reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE); + /* Release SPI2 from reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE); + } + } +} + +/** + * @brief Initializes the SPIx peripheral according to the specified + * parameters in the SPI_InitStruct. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param SPI_InitStruct: pointer to a SPI_InitTypeDef structure that + * contains the configuration information for the specified SPI peripheral. + * @retval None + */ +void SPI_Init(SPI_TypeDef* SPIx, SPI_InitTypeDef* SPI_InitStruct) +{ + uint16_t tmpreg = 0; + + /* check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + /* Check the SPI parameters */ + assert_param(IS_SPI_DIRECTION_MODE(SPI_InitStruct->SPI_Direction)); + assert_param(IS_SPI_MODE(SPI_InitStruct->SPI_Mode)); + assert_param(IS_SPI_DATASIZE(SPI_InitStruct->SPI_DataSize)); + assert_param(IS_SPI_CPOL(SPI_InitStruct->SPI_CPOL)); + assert_param(IS_SPI_CPHA(SPI_InitStruct->SPI_CPHA)); + assert_param(IS_SPI_NSS(SPI_InitStruct->SPI_NSS)); + assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_InitStruct->SPI_BaudRatePrescaler)); + assert_param(IS_SPI_FIRST_BIT(SPI_InitStruct->SPI_FirstBit)); + assert_param(IS_SPI_CRC_POLYNOMIAL(SPI_InitStruct->SPI_CRCPolynomial)); + +/*---------------------------- SPIx CR1 Configuration ------------------------*/ + /* Get the SPIx CR1 value */ + tmpreg = SPIx->CR1; + /* Clear BIDIMode, BIDIOE, RxONLY, SSM, SSI, LSBFirst, BR, MSTR, CPOL and CPHA bits */ + tmpreg &= CR1_CLEAR_MASK; + /* Configure SPIx: direction, NSS management, first transmitted bit, BaudRate prescaler + master/salve mode, CPOL and CPHA */ + /* Set BIDImode, BIDIOE and RxONLY bits according to SPI_Direction value */ + /* Set SSM, SSI and MSTR bits according to SPI_Mode and SPI_NSS values */ + /* Set LSBFirst bit according to SPI_FirstBit value */ + /* Set BR bits according to SPI_BaudRatePrescaler value */ + /* Set CPOL bit according to SPI_CPOL value */ + /* Set CPHA bit according to SPI_CPHA value */ + tmpreg |= (uint16_t)((uint32_t)SPI_InitStruct->SPI_Direction | SPI_InitStruct->SPI_Mode | + SPI_InitStruct->SPI_DataSize | SPI_InitStruct->SPI_CPOL | + SPI_InitStruct->SPI_CPHA | SPI_InitStruct->SPI_NSS | + SPI_InitStruct->SPI_BaudRatePrescaler | SPI_InitStruct->SPI_FirstBit); + /* Write to SPIx CR1 */ + SPIx->CR1 = tmpreg; + +/*---------------------------- SPIx CRCPOLY Configuration --------------------*/ + /* Write to SPIx CRCPOLY */ + SPIx->CRCPR = SPI_InitStruct->SPI_CRCPolynomial; +} + +/** + * @brief Fills each SPI_InitStruct member with its default value. + * @param SPI_InitStruct : pointer to a SPI_InitTypeDef structure which will be initialized. + * @retval None + */ +void SPI_StructInit(SPI_InitTypeDef* SPI_InitStruct) +{ +/*--------------- Reset SPI init structure parameters values -----------------*/ + /* Initialize the SPI_Direction member */ + SPI_InitStruct->SPI_Direction = SPI_Direction_2Lines_FullDuplex; + /* initialize the SPI_Mode member */ + SPI_InitStruct->SPI_Mode = SPI_Mode_Slave; + /* initialize the SPI_DataSize member */ + SPI_InitStruct->SPI_DataSize = SPI_DataSize_8b; + /* Initialize the SPI_CPOL member */ + SPI_InitStruct->SPI_CPOL = SPI_CPOL_Low; + /* Initialize the SPI_CPHA member */ + SPI_InitStruct->SPI_CPHA = SPI_CPHA_1Edge; + /* Initialize the SPI_NSS member */ + SPI_InitStruct->SPI_NSS = SPI_NSS_Hard; + /* Initialize the SPI_BaudRatePrescaler member */ + SPI_InitStruct->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; + /* Initialize the SPI_FirstBit member */ + SPI_InitStruct->SPI_FirstBit = SPI_FirstBit_MSB; + /* Initialize the SPI_CRCPolynomial member */ + SPI_InitStruct->SPI_CRCPolynomial = 7; +} + + +/** + * @brief Enables or disables the specified SPI peripheral. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param NewState: new state of the SPIx peripheral. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void SPI_Cmd(SPI_TypeDef* SPIx, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + /* Enable the selected SPI peripheral */ + SPIx->CR1 |= SPI_CR1_SPE; + } + else + { + /* Disable the selected SPI peripheral */ + SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_SPE); + } +} + +/** + * @brief Enables or disables the specified SPI interrupts. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @param SPI_IT: specifies the SPI interrupt source to be enabled or disabled. + * This parameter can be one of the following values: + * @arg SPI_IT_TXE: Tx buffer empty interrupt mask + * @arg SPI_IT_RXNE: Rx buffer not empty interrupt mask + * @arg SPI_IT_ERR: Error interrupt mask + * @param NewState: new state of the specified SPI interrupt. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void SPI_ITConfig(SPI_TypeDef* SPIx, uint8_t SPI_IT, FunctionalState NewState) +{ + uint16_t itpos = 0, itmask = 0 ; + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + assert_param(IS_SPI_CONFIG_IT(SPI_IT)); + + /* Get the SPI IT index */ + itpos = SPI_IT >> 4; + + /* Set the IT mask */ + itmask = (uint16_t)1 << (uint16_t)itpos; + + if (NewState != DISABLE) + { + /* Enable the selected SPI interrupt */ + SPIx->CR2 |= itmask; + } + else + { + /* Disable the selected SPI interrupt */ + SPIx->CR2 &= (uint16_t)~itmask; + } +} + +/** + * @brief Enables or disables the SPIx DMA interface. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @param SPI_DMAReq: specifies the SPI DMA transfer request to be enabled or disabled. + * This parameter can be any combination of the following values: + * @arg SPI_DMAReq_Tx: Tx buffer DMA transfer request + * @arg SPI_DMAReq_Rx: Rx buffer DMA transfer request + * @param NewState: new state of the selected SPI DMA transfer request. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void SPI_DMACmd(SPI_TypeDef* SPIx, uint16_t SPI_DMAReq, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + assert_param(IS_SPI_DMAREQ(SPI_DMAReq)); + if (NewState != DISABLE) + { + /* Enable the selected SPI DMA requests */ + SPIx->CR2 |= SPI_DMAReq; + } + else + { + /* Disable the selected SPI DMA requests */ + SPIx->CR2 &= (uint16_t)~SPI_DMAReq; + } +} + +/** + * @brief Transmits a Data through the SPIx peripheral. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @param Data : Data to be transmitted. + * @retval None + */ +void SPI_SendData(SPI_TypeDef* SPIx, uint16_t Data) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + /* Write in the DR register the data to be sent */ + SPIx->DR = Data; +} + +/** + * @brief Returns the most recent received data by the SPIx peripheral. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @retval The value of the received data. + */ +uint16_t SPI_ReceiveData(SPI_TypeDef* SPIx) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + /* Return the data in the DR register */ + return SPIx->DR; +} + +/** + * @brief Configures internally by software the NSS pin for the selected SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param SPI_NSSInternalSoft: specifies the SPI NSS internal state. + * This parameter can be one of the following values: + * @arg SPI_NSSInternalSoft_Set: Set NSS pin internally + * @arg SPI_NSSInternalSoft_Reset: Reset NSS pin internally + * @retval None + */ +void SPI_NSSInternalSoftwareConfig(SPI_TypeDef* SPIx, uint16_t SPI_NSSInternalSoft) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_NSS_INTERNAL(SPI_NSSInternalSoft)); + if (SPI_NSSInternalSoft != SPI_NSSInternalSoft_Reset) + { + /* Set NSS pin internally by software */ + SPIx->CR1 |= SPI_NSSInternalSoft_Set; + } + else + { + /* Reset NSS pin internally by software */ + SPIx->CR1 &= SPI_NSSInternalSoft_Reset; + } +} + +/** + * @brief Enables or disables the SS output for the selected SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param NewState: new state of the SPIx SS output. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void SPI_SSOutputCmd(SPI_TypeDef* SPIx, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + /* Enable the selected SPI SS output */ + SPIx->CR2 |= (uint16_t)SPI_CR2_SSOE; + } + else + { + /* Disable the selected SPI SS output */ + SPIx->CR2 &= (uint16_t)~((uint16_t)SPI_CR2_SSOE); + } +} + +/** + * @brief Configures the data size for the selected SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param SPI_DataSize: specifies the SPI data size. + * This parameter can be one of the following values: + * @arg SPI_DataSize_16b: Set data frame format to 16bit + * @arg SPI_DataSize_8b: Set data frame format to 8bit + * @retval None + */ +void SPI_DataSizeConfig(SPI_TypeDef* SPIx, uint16_t SPI_DataSize) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_DATASIZE(SPI_DataSize)); + /* Clear DFF bit */ + SPIx->CR1 &= (uint16_t)~SPI_DataSize_16b; + /* Set new DFF bit value */ + SPIx->CR1 |= SPI_DataSize; +} + +/** + * @brief Transmit the SPIx CRC value. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @retval None + */ +void SPI_TransmitCRC(SPI_TypeDef* SPIx) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + /* Enable the selected SPI CRC transmission */ + SPIx->CR1 |= SPI_CR1_CRCNEXT; +} + +/** + * @brief Enables or disables the CRC value calculation of the transfered bytes. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param NewState: new state of the SPIx CRC value calculation. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void SPI_CalculateCRC(SPI_TypeDef* SPIx, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + /* Enable the selected SPI CRC calculation */ + SPIx->CR1 |= SPI_CR1_CRCEN; + } + else + { + /* Disable the selected SPI CRC calculation */ + SPIx->CR1 &= (uint16_t)~((uint16_t)SPI_CR1_CRCEN); + } +} + +/** + * @brief Returns the transmit or the receive CRC register value for the specified SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param SPI_CRC: specifies the CRC register to be read. + * This parameter can be one of the following values: + * @arg SPI_CRC_Tx: Selects Tx CRC register + * @arg SPI_CRC_Rx: Selects Rx CRC register + * @retval The selected CRC register value.. + */ +uint16_t SPI_GetCRC(SPI_TypeDef* SPIx, uint8_t SPI_CRC) +{ + uint16_t crcreg = 0; + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_CRC(SPI_CRC)); + if (SPI_CRC != SPI_CRC_Rx) + { + /* Get the Tx CRC register */ + crcreg = SPIx->TXCRCR; + } + else + { + /* Get the Rx CRC register */ + crcreg = SPIx->RXCRCR; + } + /* Return the selected CRC register */ + return crcreg; +} + +/** + * @brief Returns the CRC Polynomial register value for the specified SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @retval The CRC Polynomial register value. + */ +uint16_t SPI_GetCRCPolynomial(SPI_TypeDef* SPIx) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + + /* Return the CRC polynomial register */ + return SPIx->CRCPR; +} + +/** + * @brief Selects the data transfer direction in bi-directional mode for the specified SPI. + * @param SPIx: where x can be 1 or 2 to select the SPI peripheral. + * @param SPI_Direction: specifies the data transfer direction in bi-directional mode. + * This parameter can be one of the following values: + * @arg SPI_Direction_Tx: Selects Tx transmission direction + * @arg SPI_Direction_Rx: Selects Rx receive direction + * @retval None + */ +void SPI_BiDirectionalLineConfig(SPI_TypeDef* SPIx, uint16_t SPI_Direction) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_DIRECTION(SPI_Direction)); + if (SPI_Direction == SPI_Direction_Tx) + { + /* Set the Tx only mode */ + SPIx->CR1 |= SPI_Direction_Tx; + } + else + { + /* Set the Rx only mode */ + SPIx->CR1 &= SPI_Direction_Rx; + } +} + +/** + * @brief Checks whether the specified SPI flag is set or not. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @param SPI_FLAG: specifies the SPI flag to check. + * This parameter can be one of the following values: + * @arg SPI_FLAG_TXE: Transmit buffer empty flag. + * @arg SPI_FLAG_RXNE: Receive buffer not empty flag. + * @arg SPI_FLAG_BSY: Busy flag. + * @arg SPI_FLAG_OVR: Overrun flag. + * @arg SPI_FLAG_MODF: Mode Fault flag. + * @arg SPI_FLAG_CRCERR: CRC Error flag. + * @retval The new state of SPI_FLAG (SET or RESET). + */ +FlagStatus SPI_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_FLAG) +{ + FlagStatus bitstatus = RESET; + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_GET_FLAG(SPI_FLAG)); + /* Check the status of the specified SPI flag */ + if ((SPIx->SR & SPI_FLAG) != (uint16_t)RESET) + { + /* SPI_FLAG is set */ + bitstatus = SET; + } + else + { + /* SPI_FLAG is reset */ + bitstatus = RESET; + } + /* Return the SPI_FLAG status */ + return bitstatus; +} + +/** + * @brief Clears the SPIx CRC Error (CRCERR) flag. + * @param SPIx: where x can be 1 or 2 in SPI mode + * @param SPI_FLAG: specifies the SPI flag to clear. + * This function clears only CRCERR flag. + * @note + * - OVR (OverRun error) flag is cleared by software sequence: a read + * operation to SPI_DR register (SPI_ReceiveData()) followed by a read + * operation to SPI_SR register (SPI_GetFlagStatus()). + * - UDR (UnderRun error) flag is cleared by a read operation to + * SPI_SR register (SPI_GetFlagStatus()). + * - MODF (Mode Fault) flag is cleared by software sequence: a read/write + * operation to SPI_SR register (SPI_GetFlagStatus()) followed by a + * write operation to SPI_CR1 register (SPI_Cmd() to enable the SPI). + * @retval None + */ +void SPI_ClearFlag(SPI_TypeDef* SPIx, uint16_t SPI_FLAG) +{ + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_CLEAR_FLAG(SPI_FLAG)); + + /* Clear the selected SPI CRC Error (CRCERR) flag */ + SPIx->SR = (uint16_t)~SPI_FLAG; +} + +/** + * @brief Checks whether the specified SPI interrupt has occurred or not. + * @param SPIx: where x can be + * - 1 or 2 in SPI mode + * @param SPI_IT: specifies the SPI interrupt source to check. + * This parameter can be one of the following values: + * @arg SPI_IT_TXE: Transmit buffer empty interrupt. + * @arg SPI_IT_RXNE: Receive buffer not empty interrupt. + * @arg SPI_IT_OVR: Overrun interrupt. + * @arg SPI_IT_MODF: Mode Fault interrupt. + * @arg SPI_IT_CRCERR: CRC Error interrupt. + * @retval The new state of SPI_IT (SET or RESET). + */ +ITStatus SPI_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_IT) +{ + ITStatus bitstatus = RESET; + uint16_t itpos = 0, itmask = 0, enablestatus = 0; + + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_GET_IT(SPI_IT)); + + /* Get the SPI IT index */ + itpos = 0x01 << (SPI_IT & 0x0F); + + /* Get the SPI IT mask */ + itmask = SPI_IT >> 4; + + /* Set the IT mask */ + itmask = 0x01 << itmask; + + /* Get the SPI_IT enable bit status */ + enablestatus = (SPIx->CR2 & itmask) ; + + /* Check the status of the specified SPI interrupt */ + if (((SPIx->SR & itpos) != (uint16_t)RESET) && enablestatus) + { + /* SPI_IT is set */ + bitstatus = SET; + } + else + { + /* SPI_IT is reset */ + bitstatus = RESET; + } + /* Return the SPI_IT status */ + return bitstatus; +} + +/** + * @brief Clears the SPIx CRC Error (CRCERR) interrupt pending bit. + * @param SPIx: where x can be + * - 1 or 2 in SPI mode + * @param SPI_IT: specifies the SPI interrupt pending bit to clear. + * This function clears only CRCERR intetrrupt pending bit. + * @note + * - OVR (OverRun Error) interrupt pending bit is cleared by software + * sequence: a read operation to SPI_DR register (SPI_ReceiveData()) + * followed by a read operation to SPI_SR register (SPI_GetITStatus()). + * - UDR (UnderRun Error) interrupt pending bit is cleared by a read + * operation to SPI_SR register (SPI_GetITStatus()). + * - MODF (Mode Fault) interrupt pending bit is cleared by software sequence: + * a read/write operation to SPI_SR register (SPI_GetITStatus()) + * followed by a write operation to SPI_CR1 register (SPI_Cmd() to enable + * the SPI). + * @retval None + */ +void SPI_ClearITPendingBit(SPI_TypeDef* SPIx, uint8_t SPI_IT) +{ + uint16_t itpos = 0; + /* Check the parameters */ + assert_param(IS_SPI_ALL_PERIPH(SPIx)); + assert_param(IS_SPI_CLEAR_IT(SPI_IT)); + + /* Get the SPI IT index */ + itpos = 0x01 << (SPI_IT & 0x0F); + + /* Clear the selected SPI CRC Error (CRCERR) interrupt pending bit */ + SPIx->SR = (uint16_t)~itpos; +} +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/ -- 2.39.2