STM32F0xx_CPAL_Driver.zip_cpal_stm32f0xx_zip

/** ****************************************************************************** * @file stm32f0xx_i2c_cpal.c * @author MCD Application Team * @version V1.0.0RC1 * @date 27-January-2012 * @brief This file provides all the CPAL firmware functions for I2C peripheral. ****************************************************************************** * @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. * * FOR MORE INFORMATION PLEASE READ CAREFULLY THE LICENSE AGREEMENT FILE * LOCATED IN THE ROOT DIRECTORY OF THIS FIRMWARE PACKAGE. * * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2> ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f0xx_i2c_cpal.h" /* Private typedef -----------------------------------------------------------*/ /* Private defines -----------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* This macro allows to test on a flag status and to start Timeout procedure if the waiting time exceeds the allowed timeout period. @note This macro has not been implemented as a function because the entered parameter 'cmd' itself can be a macro (if it was implemented as a function, the check on the flag would be done only once, while the required behavior is to check the flag continuously).*/ #define __CPAL_I2C_TIMEOUT_DETECT ((pDevInitStruct->wCPAL_Timeout == CPAL_I2C_TIMEOUT_MIN) ||\ (pDevInitStruct->wCPAL_Timeout == CPAL_I2C_TIMEOUT_DEFAULT)) #define __CPAL_I2C_TIMEOUT(cmd, timeout) pDevInitStruct->wCPAL_Timeout = CPAL_I2C_TIMEOUT_MIN + (timeout);\ while (((cmd) == 0) && (!__CPAL_I2C_TIMEOUT_DETECT))\ if (__CPAL_I2C_TIMEOUT_DETECT)\ {\ return CPAL_I2C_Timeout (pDevInitStruct); \ }\ pDevInitStruct->wCPAL_Timeout = CPAL_I2C_TIMEOUT_DEFAULT /* Private variables ---------------------------------------------------------*/ /*========= Table Exported from HAL =========*/ extern I2C_TypeDef* CPAL_I2C_DEVICE[]; #ifdef CPAL_I2C_DMA_PROGMODEL extern DMA_TypeDef* CPAL_I2C_DMA[]; extern DMA_Channel_TypeDef* CPAL_I2C_DMA_TX_Channel[]; extern DMA_Channel_TypeDef* CPAL_I2C_DMA_RX_Channel[]; extern const uint32_t CPAL_I2C_DMA_TX_TC_FLAG[]; extern const uint32_t CPAL_I2C_DMA_RX_TC_FLAG[]; extern const uint32_t CPAL_I2C_DMA_TX_HT_FLAG[]; extern const uint32_t CPAL_I2C_DMA_RX_HT_FLAG[]; extern const uint32_t CPAL_I2C_DMA_TX_TE_FLAG[]; extern const uint32_t CPAL_I2C_DMA_RX_TE_FLAG[]; #endif /* CPAL_I2C_DMA_PROGMODEL */ /*========= Local structures used in CPAL_I2C_StructInit() function ==========*/ I2C_InitTypeDef I2C_InitStructure; __IO uint32_t Num_Data = 0; uint32_t CR2_tmp = 0; /* Private function prototypes -----------------------------------------------*/ /*========= Local Master events handlers =========*/ #ifdef CPAL_I2C_MASTER_MODE static uint32_t I2C_MASTER_TCR_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master TCR Interrupt event */ static uint32_t I2C_MASTER_TC_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master TC Interrupt event */ static uint32_t I2C_MASTER_STOP_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master STOP Interrupt event */ static uint32_t I2C_MASTER_NACK_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master NACK Interrupt event */ #ifdef CPAL_I2C_IT_PROGMODEL static uint32_t I2C_MASTER_TXIS_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master TXIS Interrupt event */ static uint32_t I2C_MASTER_RXNE_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Master RXNE Interrupt event */ #endif /* CPAL_I2C_IT_PROGMODEL */ #endif /* CPAL_I2C_MASTER_MODE */ /*========= Local Slave events handlers =========*/ #ifdef CPAL_I2C_SLAVE_MODE static uint32_t I2C_SLAVE_ADDR_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Slave ADDR Interrupt event */ static uint32_t I2C_SLAVE_STOP_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Slave STOPF Interrupt event */ static uint32_t I2C_SLAVE_NACK_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Slave NACK Interrupt event */ #ifdef CPAL_I2C_IT_PROGMODEL static uint32_t I2C_SLAVE_TXIS_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Slave TXIS Interrupt event */ static uint32_t I2C_SLAVE_RXNE_Handle(CPAL_InitTypeDef* pDevInitStruct); /* Handle Slave RXNE Interrupt event */ #endif /* CPAL_I2C_IT_PROGMODEL */ #endif /* CPAL_I2C_SLAVE_MODE */ #ifdef CPAL_I2C_DMA_PROGMODEL /*========= Local DMA Manager =========*/ static uint32_t I2C_Enable_DMA (CPAL_InitTypeDef* pDevInitStruct, CPAL_DirectionTypeDef Direction); #endif /* CPAL_I2C_DMA_PROGMODEL */ /*========= CPAL Timeout handler =========*/ static uint32_t CPAL_I2C_Timeout (CPAL_InitTypeDef* pDevInitStruct); /* Private functions ---------------------------------------------------------*/ /*================== USER CPAL Functions ==================*/ /** * @brief Initialize the peripheral and all related clocks, GPIOs, DMA and * Interrupts according to the specified parameters in the * CPAL_InitTypeDef structure. * @param pDevInitStruct : Pointer to the peripheral configuration structure. * @retval CPAL_PASS or CPAL_FAIL */ uint32_t CPAL_I2C_Init(CPAL_InitTypeDef* pDevInitStruct) { CPAL_LOG("\n\r\n\rLOG <CPAL_I2C_Init> : I2C Device Init"); /* If CPAL_State is not BUSY */ if ((pDevInitStruct->CPAL_State == CPAL_STATE_READY) || (pDevInitStruct->CPAL_State == CPAL_STATE_ERROR) || (pDevInitStruct->CPAL_State == CPAL_STATE_DISABLED)) { /* - If CPAL_State is CPAL_STATE_ERROR (an Error occurred in transaction): Perform the initialization routines (device will be deinitialized during initialization). - If CPAL_State is CPAL_STATE_READY: Perform the initialization routines - If CPAL_State is CPAL_STATE_DISABLED: Perform the Initialization routines */ #ifndef CPAL_I2C_DMA_PROGMODEL if (pDevInitStruct->CPAL_ProgModel == CPAL_PROGMODEL_DMA) { /* Update CPAL_State to CPAL_STATE_ERROR */ pDevInitStruct->CPAL_State = CPAL_STATE_ERROR; /* Exit Init function */ return CPAL_FAIL; } #endif /* CPAL_I2C_DMA_PROGMODEL */ #ifndef CPAL_I2C_IT_PROGMODEL if (pDevInitStruct->CPAL_ProgModel == CPAL_PROGMODEL_INTERRUPT) { /* Update CPAL_State to CPAL_STATE_ERROR */ pDevInitStruct->CPAL_State = CPAL_STATE_ERROR; /* Exit Init function */ return CPAL_FAIL; } #endif /* CPAL_I2C_IT_PROGMODEL */ /* Disable I2Cx device */ __CPAL_I2C_HAL_DISABLE_DEV(pDevInitStruct->CPAL_Dev); CPAL_LOG("\n\rLOG : I2C Device Disabled"); /* Deinitialize I2Cx GPIO */ CPAL_I2C_HAL_GPIODeInit(pDevInitStruct->CPAL_Dev); CPAL_LOG("\n\rLOG : I2C Device IOs Deinit"); /* Deinitialize I2Cx clock */ CPAL_I2C_HAL_CLKDeInit(pDevIn