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povik |
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/** |
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****************************************************************************** |
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* @file stm32f10x_flash.c |
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* @author MCD Application Team |
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* @version V3.1.0 |
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* @date 06/19/2009 |
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* @brief This file provides all the FLASH firmware functions. |
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****************************************************************************** |
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* @copy |
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* |
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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* |
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* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2> |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f10x_flash.h" |
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/** @addtogroup STM32F10x_StdPeriph_Driver |
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* @{ |
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*/ |
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/** @defgroup FLASH |
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* @brief FLASH driver modules |
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* @{ |
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*/ |
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/** @defgroup FLASH_Private_TypesDefinitions |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup FLASH_Private_Defines |
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* @{ |
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*/ |
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/* Flash Access Control Register bits */ |
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#define ACR_LATENCY_Mask ((uint32_t)0x00000038) |
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#define ACR_HLFCYA_Mask ((uint32_t)0xFFFFFFF7) |
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#define ACR_PRFTBE_Mask ((uint32_t)0xFFFFFFEF) |
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/* Flash Access Control Register bits */ |
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#define ACR_PRFTBS_Mask ((uint32_t)0x00000020) |
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/* Flash Control Register bits */ |
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#define CR_PG_Set ((uint32_t)0x00000001) |
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#define CR_PG_Reset ((uint32_t)0x00001FFE) |
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#define CR_PER_Set ((uint32_t)0x00000002) |
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#define CR_PER_Reset ((uint32_t)0x00001FFD) |
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#define CR_MER_Set ((uint32_t)0x00000004) |
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#define CR_MER_Reset ((uint32_t)0x00001FFB) |
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#define CR_OPTPG_Set ((uint32_t)0x00000010) |
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#define CR_OPTPG_Reset ((uint32_t)0x00001FEF) |
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#define CR_OPTER_Set ((uint32_t)0x00000020) |
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#define CR_OPTER_Reset ((uint32_t)0x00001FDF) |
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#define CR_STRT_Set ((uint32_t)0x00000040) |
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#define CR_LOCK_Set ((uint32_t)0x00000080) |
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/* FLASH Mask */ |
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#define RDPRT_Mask ((uint32_t)0x00000002) |
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#define WRP0_Mask ((uint32_t)0x000000FF) |
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#define WRP1_Mask ((uint32_t)0x0000FF00) |
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#define WRP2_Mask ((uint32_t)0x00FF0000) |
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#define WRP3_Mask ((uint32_t)0xFF000000) |
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/* FLASH Keys */ |
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#define RDP_Key ((uint16_t)0x00A5) |
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#define FLASH_KEY1 ((uint32_t)0x45670123) |
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#define FLASH_KEY2 ((uint32_t)0xCDEF89AB) |
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/* Delay definition */ |
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#define EraseTimeout ((uint32_t)0x00000FFF) |
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#define ProgramTimeout ((uint32_t)0x0000000F) |
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/** |
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* @} |
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*/ |
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/** @defgroup FLASH_Private_Macros |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup FLASH_Private_Variables |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup FLASH_Private_FunctionPrototypes |
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* @{ |
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*/ |
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static void delay(void); |
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/** |
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* @} |
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*/ |
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/** @defgroup FLASH_Private_Functions |
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* @{ |
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*/ |
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/** |
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* @brief Sets the code latency value. |
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* @param FLASH_Latency: specifies the FLASH Latency value. |
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* This parameter can be one of the following values: |
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* @arg FLASH_Latency_0: FLASH Zero Latency cycle |
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* @arg FLASH_Latency_1: FLASH One Latency cycle |
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* @arg FLASH_Latency_2: FLASH Two Latency cycles |
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* @retval None |
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*/ |
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void FLASH_SetLatency(uint32_t FLASH_Latency) |
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{ |
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uint32_t tmpreg = 0; |
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/* Check the parameters */ |
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assert_param(IS_FLASH_LATENCY(FLASH_Latency)); |
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/* Read the ACR register */ |
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tmpreg = FLASH->ACR; |
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/* Sets the Latency value */ |
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tmpreg &= ACR_LATENCY_Mask; |
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tmpreg |= FLASH_Latency; |
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/* Write the ACR register */ |
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FLASH->ACR = tmpreg; |
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} |
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/** |
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* @brief Enables or disables the Half cycle flash access. |
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* @param FLASH_HalfCycleAccess: specifies the FLASH Half cycle Access mode. |
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* This parameter can be one of the following values: |
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* @arg FLASH_HalfCycleAccess_Enable: FLASH Half Cycle Enable |
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* @arg FLASH_HalfCycleAccess_Disable: FLASH Half Cycle Disable |
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* @retval None |
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*/ |
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void FLASH_HalfCycleAccessCmd(uint32_t FLASH_HalfCycleAccess) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_FLASH_HALFCYCLEACCESS_STATE(FLASH_HalfCycleAccess)); |
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/* Enable or disable the Half cycle access */ |
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FLASH->ACR &= ACR_HLFCYA_Mask; |
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FLASH->ACR |= FLASH_HalfCycleAccess; |
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} |
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/** |
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* @brief Enables or disables the Prefetch Buffer. |
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* @param FLASH_PrefetchBuffer: specifies the Prefetch buffer status. |
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* This parameter can be one of the following values: |
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* @arg FLASH_PrefetchBuffer_Enable: FLASH Prefetch Buffer Enable |
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* @arg FLASH_PrefetchBuffer_Disable: FLASH Prefetch Buffer Disable |
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* @retval None |
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*/ |
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void FLASH_PrefetchBufferCmd(uint32_t FLASH_PrefetchBuffer) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_FLASH_PREFETCHBUFFER_STATE(FLASH_PrefetchBuffer)); |
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/* Enable or disable the Prefetch Buffer */ |
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FLASH->ACR &= ACR_PRFTBE_Mask; |
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FLASH->ACR |= FLASH_PrefetchBuffer; |
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} |
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/** |
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* @brief Unlocks the FLASH Program Erase Controller. |
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* @param None |
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* @retval None |
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*/ |
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void FLASH_Unlock(void) |
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{ |
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/* Authorize the FPEC Access */ |
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FLASH->KEYR = FLASH_KEY1; |
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FLASH->KEYR = FLASH_KEY2; |
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} |
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/** |
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* @brief Locks the FLASH Program Erase Controller. |
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* @param None |
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* @retval None |
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*/ |
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void FLASH_Lock(void) |
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{ |
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/* Set the Lock Bit to lock the FPEC and the FCR */ |
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FLASH->CR |= CR_LOCK_Set; |
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} |
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/** |
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* @brief Erases a specified FLASH page. |
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* @param Page_Address: The page address to be erased. |
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* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG, |
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* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
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*/ |
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FLASH_Status FLASH_ErasePage(uint32_t Page_Address) |
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{ |
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FLASH_Status status = FLASH_COMPLETE; |
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/* Check the parameters */ |
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assert_param(IS_FLASH_ADDRESS(Page_Address)); |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* if the previous operation is completed, proceed to erase the page */ |
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FLASH->CR|= CR_PER_Set; |
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FLASH->AR = Page_Address; |
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FLASH->CR|= CR_STRT_Set; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status != FLASH_TIMEOUT) |
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{ |
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/* if the erase operation is completed, disable the PER Bit */ |
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FLASH->CR &= CR_PER_Reset; |
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} |
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} |
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/* Return the Erase Status */ |
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return status; |
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} |
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/** |
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* @brief Erases all FLASH pages. |
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* @param None |
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* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
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* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
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*/ |
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FLASH_Status FLASH_EraseAllPages(void) |
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{ |
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FLASH_Status status = FLASH_COMPLETE; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* if the previous operation is completed, proceed to erase all pages */ |
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FLASH->CR |= CR_MER_Set; |
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FLASH->CR |= CR_STRT_Set; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status != FLASH_TIMEOUT) |
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{ |
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/* if the erase operation is completed, disable the MER Bit */ |
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FLASH->CR &= CR_MER_Reset; |
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} |
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} |
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/* Return the Erase Status */ |
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return status; |
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} |
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/** |
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* @brief Erases the FLASH option bytes. |
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* @param None |
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* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
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* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
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*/ |
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FLASH_Status FLASH_EraseOptionBytes(void) |
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{ |
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FLASH_Status status = FLASH_COMPLETE; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* Authorize the small information block programming */ |
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FLASH->OPTKEYR = FLASH_KEY1; |
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FLASH->OPTKEYR = FLASH_KEY2; |
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/* if the previous operation is completed, proceed to erase the option bytes */ |
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FLASH->CR |= CR_OPTER_Set; |
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FLASH->CR |= CR_STRT_Set; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(EraseTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* if the erase operation is completed, disable the OPTER Bit */ |
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FLASH->CR &= CR_OPTER_Reset; |
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/* Enable the Option Bytes Programming operation */ |
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FLASH->CR |= CR_OPTPG_Set; |
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/* Enable the readout access */ |
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OB->RDP= RDP_Key; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(ProgramTimeout); |
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if(status != FLASH_TIMEOUT) |
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{ |
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/* if the program operation is completed, disable the OPTPG Bit */ |
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FLASH->CR &= CR_OPTPG_Reset; |
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} |
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} |
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else |
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{ |
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if (status != FLASH_TIMEOUT) |
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{ |
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/* Disable the OPTPG Bit */ |
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FLASH->CR &= CR_OPTPG_Reset; |
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} |
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} |
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} |
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/* Return the erase status */ |
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return status; |
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} |
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/** |
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* @brief Programs a word at a specified address. |
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* @param Address: specifies the address to be programmed. |
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* @param Data: specifies the data to be programmed. |
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* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
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* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
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*/ |
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FLASH_Status FLASH_ProgramWord(uint32_t Address, uint32_t Data) |
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{ |
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FLASH_Status status = FLASH_COMPLETE; |
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__IO uint32_t tmp = 0; |
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/* Check the parameters */ |
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assert_param(IS_FLASH_ADDRESS(Address)); |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(ProgramTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* if the previous operation is completed, proceed to program the new first |
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half word */ |
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FLASH->CR |= CR_PG_Set; |
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*(__IO uint16_t*)Address = (uint16_t)Data; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(ProgramTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
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/* if the previous operation is completed, proceed to program the new second |
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half word */ |
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tmp = Address + 2; |
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*(__IO uint16_t*) tmp = Data >> 16; |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(ProgramTimeout); |
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if(status != FLASH_TIMEOUT) |
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{ |
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/* Disable the PG Bit */ |
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FLASH->CR &= CR_PG_Reset; |
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} |
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} |
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else |
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{ |
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if (status != FLASH_TIMEOUT) |
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{ |
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/* Disable the PG Bit */ |
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FLASH->CR &= CR_PG_Reset; |
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} |
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} |
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} |
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/* Return the Program Status */ |
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return status; |
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} |
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/** |
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* @brief Programs a half word at a specified address. |
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* @param Address: specifies the address to be programmed. |
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* @param Data: specifies the data to be programmed. |
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* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
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* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
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*/ |
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384 |
FLASH_Status FLASH_ProgramHalfWord(uint32_t Address, uint16_t Data) |
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{ |
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FLASH_Status status = FLASH_COMPLETE; |
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/* Check the parameters */ |
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assert_param(IS_FLASH_ADDRESS(Address)); |
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/* Wait for last operation to be completed */ |
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status = FLASH_WaitForLastOperation(ProgramTimeout); |
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if(status == FLASH_COMPLETE) |
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{ |
|
|
394 |
/* if the previous operation is completed, proceed to program the new data */ |
|
|
395 |
FLASH->CR |= CR_PG_Set; |
|
|
396 |
|
|
|
397 |
*(__IO uint16_t*)Address = Data; |
|
|
398 |
/* Wait for last operation to be completed */ |
|
|
399 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
400 |
if(status != FLASH_TIMEOUT) |
|
|
401 |
{ |
|
|
402 |
/* if the program operation is completed, disable the PG Bit */ |
|
|
403 |
FLASH->CR &= CR_PG_Reset; |
|
|
404 |
} |
|
|
405 |
} |
|
|
406 |
/* Return the Program Status */ |
|
|
407 |
return status; |
|
|
408 |
} |
|
|
409 |
|
|
|
410 |
/** |
|
|
411 |
* @brief Programs a half word at a specified Option Byte Data address. |
|
|
412 |
* @param Address: specifies the address to be programmed. |
|
|
413 |
* This parameter can be 0x1FFFF804 or 0x1FFFF806. |
|
|
414 |
* @param Data: specifies the data to be programmed. |
|
|
415 |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
|
|
416 |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
|
|
417 |
*/ |
|
|
418 |
FLASH_Status FLASH_ProgramOptionByteData(uint32_t Address, uint8_t Data) |
|
|
419 |
{ |
|
|
420 |
FLASH_Status status = FLASH_COMPLETE; |
|
|
421 |
/* Check the parameters */ |
|
|
422 |
assert_param(IS_OB_DATA_ADDRESS(Address)); |
|
|
423 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
424 |
if(status == FLASH_COMPLETE) |
|
|
425 |
{ |
|
|
426 |
/* Authorize the small information block programming */ |
|
|
427 |
FLASH->OPTKEYR = FLASH_KEY1; |
|
|
428 |
FLASH->OPTKEYR = FLASH_KEY2; |
|
|
429 |
/* Enables the Option Bytes Programming operation */ |
|
|
430 |
FLASH->CR |= CR_OPTPG_Set; |
|
|
431 |
*(__IO uint16_t*)Address = Data; |
|
|
432 |
|
|
|
433 |
/* Wait for last operation to be completed */ |
|
|
434 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
435 |
if(status != FLASH_TIMEOUT) |
|
|
436 |
{ |
|
|
437 |
/* if the program operation is completed, disable the OPTPG Bit */ |
|
|
438 |
FLASH->CR &= CR_OPTPG_Reset; |
|
|
439 |
} |
|
|
440 |
} |
|
|
441 |
/* Return the Option Byte Data Program Status */ |
|
|
442 |
return status; |
|
|
443 |
} |
|
|
444 |
|
|
|
445 |
/** |
|
|
446 |
* @brief Write protects the desired pages |
|
|
447 |
* @param FLASH_Pages: specifies the address of the pages to be write protected. |
|
|
448 |
* This parameter can be: |
|
|
449 |
* @arg For @b STM32_Low-density_devices: value between FLASH_WRProt_Pages0to3 and FLASH_WRProt_Pages28to31 |
|
|
450 |
* @arg For @b STM32_Medium-density_devices: value between FLASH_WRProt_Pages0to3 |
|
|
451 |
* and FLASH_WRProt_Pages124to127 |
|
|
452 |
* @arg For @b STM32_High-density_devices: value between FLASH_WRProt_Pages0to1 and |
|
|
453 |
* FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to255 |
|
|
454 |
* @arg For @b STM32_Connectivity_line_devices: value between FLASH_WRProt_Pages0to1 and |
|
|
455 |
* FLASH_WRProt_Pages60to61 or FLASH_WRProt_Pages62to127 |
|
|
456 |
* @arg FLASH_WRProt_AllPages |
|
|
457 |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
|
|
458 |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
|
|
459 |
*/ |
|
|
460 |
FLASH_Status FLASH_EnableWriteProtection(uint32_t FLASH_Pages) |
|
|
461 |
{ |
|
|
462 |
uint16_t WRP0_Data = 0xFFFF, WRP1_Data = 0xFFFF, WRP2_Data = 0xFFFF, WRP3_Data = 0xFFFF; |
|
|
463 |
|
|
|
464 |
FLASH_Status status = FLASH_COMPLETE; |
|
|
465 |
|
|
|
466 |
/* Check the parameters */ |
|
|
467 |
assert_param(IS_FLASH_WRPROT_PAGE(FLASH_Pages)); |
|
|
468 |
|
|
|
469 |
FLASH_Pages = (uint32_t)(~FLASH_Pages); |
|
|
470 |
WRP0_Data = (uint16_t)(FLASH_Pages & WRP0_Mask); |
|
|
471 |
WRP1_Data = (uint16_t)((FLASH_Pages & WRP1_Mask) >> 8); |
|
|
472 |
WRP2_Data = (uint16_t)((FLASH_Pages & WRP2_Mask) >> 16); |
|
|
473 |
WRP3_Data = (uint16_t)((FLASH_Pages & WRP3_Mask) >> 24); |
|
|
474 |
|
|
|
475 |
/* Wait for last operation to be completed */ |
|
|
476 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
477 |
|
|
|
478 |
if(status == FLASH_COMPLETE) |
|
|
479 |
{ |
|
|
480 |
/* Authorizes the small information block programming */ |
|
|
481 |
FLASH->OPTKEYR = FLASH_KEY1; |
|
|
482 |
FLASH->OPTKEYR = FLASH_KEY2; |
|
|
483 |
FLASH->CR |= CR_OPTPG_Set; |
|
|
484 |
if(WRP0_Data != 0xFF) |
|
|
485 |
{ |
|
|
486 |
OB->WRP0 = WRP0_Data; |
|
|
487 |
|
|
|
488 |
/* Wait for last operation to be completed */ |
|
|
489 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
490 |
} |
|
|
491 |
if((status == FLASH_COMPLETE) && (WRP1_Data != 0xFF)) |
|
|
492 |
{ |
|
|
493 |
OB->WRP1 = WRP1_Data; |
|
|
494 |
|
|
|
495 |
/* Wait for last operation to be completed */ |
|
|
496 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
497 |
} |
|
|
498 |
if((status == FLASH_COMPLETE) && (WRP2_Data != 0xFF)) |
|
|
499 |
{ |
|
|
500 |
OB->WRP2 = WRP2_Data; |
|
|
501 |
|
|
|
502 |
/* Wait for last operation to be completed */ |
|
|
503 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
504 |
} |
|
|
505 |
|
|
|
506 |
if((status == FLASH_COMPLETE)&& (WRP3_Data != 0xFF)) |
|
|
507 |
{ |
|
|
508 |
OB->WRP3 = WRP3_Data; |
|
|
509 |
|
|
|
510 |
/* Wait for last operation to be completed */ |
|
|
511 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
512 |
} |
|
|
513 |
|
|
|
514 |
if(status != FLASH_TIMEOUT) |
|
|
515 |
{ |
|
|
516 |
/* if the program operation is completed, disable the OPTPG Bit */ |
|
|
517 |
FLASH->CR &= CR_OPTPG_Reset; |
|
|
518 |
} |
|
|
519 |
} |
|
|
520 |
/* Return the write protection operation Status */ |
|
|
521 |
return status; |
|
|
522 |
} |
|
|
523 |
|
|
|
524 |
/** |
|
|
525 |
* @brief Enables or disables the read out protection. |
|
|
526 |
* @note If the user has already programmed the other option bytes before calling |
|
|
527 |
* this function, he must re-program them since this function erases all option bytes. |
|
|
528 |
* @param Newstate: new state of the ReadOut Protection. |
|
|
529 |
* This parameter can be: ENABLE or DISABLE. |
|
|
530 |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
|
|
531 |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
|
|
532 |
*/ |
|
|
533 |
FLASH_Status FLASH_ReadOutProtection(FunctionalState NewState) |
|
|
534 |
{ |
|
|
535 |
FLASH_Status status = FLASH_COMPLETE; |
|
|
536 |
/* Check the parameters */ |
|
|
537 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
538 |
status = FLASH_WaitForLastOperation(EraseTimeout); |
|
|
539 |
if(status == FLASH_COMPLETE) |
|
|
540 |
{ |
|
|
541 |
/* Authorizes the small information block programming */ |
|
|
542 |
FLASH->OPTKEYR = FLASH_KEY1; |
|
|
543 |
FLASH->OPTKEYR = FLASH_KEY2; |
|
|
544 |
FLASH->CR |= CR_OPTER_Set; |
|
|
545 |
FLASH->CR |= CR_STRT_Set; |
|
|
546 |
/* Wait for last operation to be completed */ |
|
|
547 |
status = FLASH_WaitForLastOperation(EraseTimeout); |
|
|
548 |
if(status == FLASH_COMPLETE) |
|
|
549 |
{ |
|
|
550 |
/* if the erase operation is completed, disable the OPTER Bit */ |
|
|
551 |
FLASH->CR &= CR_OPTER_Reset; |
|
|
552 |
/* Enable the Option Bytes Programming operation */ |
|
|
553 |
FLASH->CR |= CR_OPTPG_Set; |
|
|
554 |
if(NewState != DISABLE) |
|
|
555 |
{ |
|
|
556 |
OB->RDP = 0x00; |
|
|
557 |
} |
|
|
558 |
else |
|
|
559 |
{ |
|
|
560 |
OB->RDP = RDP_Key; |
|
|
561 |
} |
|
|
562 |
/* Wait for last operation to be completed */ |
|
|
563 |
status = FLASH_WaitForLastOperation(EraseTimeout); |
|
|
564 |
|
|
|
565 |
if(status != FLASH_TIMEOUT) |
|
|
566 |
{ |
|
|
567 |
/* if the program operation is completed, disable the OPTPG Bit */ |
|
|
568 |
FLASH->CR &= CR_OPTPG_Reset; |
|
|
569 |
} |
|
|
570 |
} |
|
|
571 |
else |
|
|
572 |
{ |
|
|
573 |
if(status != FLASH_TIMEOUT) |
|
|
574 |
{ |
|
|
575 |
/* Disable the OPTER Bit */ |
|
|
576 |
FLASH->CR &= CR_OPTER_Reset; |
|
|
577 |
} |
|
|
578 |
} |
|
|
579 |
} |
|
|
580 |
/* Return the protection operation Status */ |
|
|
581 |
return status; |
|
|
582 |
} |
|
|
583 |
|
|
|
584 |
/** |
|
|
585 |
* @brief Programs the FLASH User Option Byte: IWDG_SW / RST_STOP / RST_STDBY. |
|
|
586 |
* @param OB_IWDG: Selects the IWDG mode |
|
|
587 |
* This parameter can be one of the following values: |
|
|
588 |
* @arg OB_IWDG_SW: Software IWDG selected |
|
|
589 |
* @arg OB_IWDG_HW: Hardware IWDG selected |
|
|
590 |
* @param OB_STOP: Reset event when entering STOP mode. |
|
|
591 |
* This parameter can be one of the following values: |
|
|
592 |
* @arg OB_STOP_NoRST: No reset generated when entering in STOP |
|
|
593 |
* @arg OB_STOP_RST: Reset generated when entering in STOP |
|
|
594 |
* @param OB_STDBY: Reset event when entering Standby mode. |
|
|
595 |
* This parameter can be one of the following values: |
|
|
596 |
* @arg OB_STDBY_NoRST: No reset generated when entering in STANDBY |
|
|
597 |
* @arg OB_STDBY_RST: Reset generated when entering in STANDBY |
|
|
598 |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
|
|
599 |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
|
|
600 |
*/ |
|
|
601 |
FLASH_Status FLASH_UserOptionByteConfig(uint16_t OB_IWDG, uint16_t OB_STOP, uint16_t OB_STDBY) |
|
|
602 |
{ |
|
|
603 |
FLASH_Status status = FLASH_COMPLETE; |
|
|
604 |
|
|
|
605 |
/* Check the parameters */ |
|
|
606 |
assert_param(IS_OB_IWDG_SOURCE(OB_IWDG)); |
|
|
607 |
assert_param(IS_OB_STOP_SOURCE(OB_STOP)); |
|
|
608 |
assert_param(IS_OB_STDBY_SOURCE(OB_STDBY)); |
|
|
609 |
|
|
|
610 |
/* Authorize the small information block programming */ |
|
|
611 |
FLASH->OPTKEYR = FLASH_KEY1; |
|
|
612 |
FLASH->OPTKEYR = FLASH_KEY2; |
|
|
613 |
|
|
|
614 |
/* Wait for last operation to be completed */ |
|
|
615 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
616 |
|
|
|
617 |
if(status == FLASH_COMPLETE) |
|
|
618 |
{ |
|
|
619 |
/* Enable the Option Bytes Programming operation */ |
|
|
620 |
FLASH->CR |= CR_OPTPG_Set; |
|
|
621 |
|
|
|
622 |
OB->USER = OB_IWDG | (uint16_t)(OB_STOP | (uint16_t)(OB_STDBY | ((uint16_t)0xF8))); |
|
|
623 |
|
|
|
624 |
/* Wait for last operation to be completed */ |
|
|
625 |
status = FLASH_WaitForLastOperation(ProgramTimeout); |
|
|
626 |
if(status != FLASH_TIMEOUT) |
|
|
627 |
{ |
|
|
628 |
/* if the program operation is completed, disable the OPTPG Bit */ |
|
|
629 |
FLASH->CR &= CR_OPTPG_Reset; |
|
|
630 |
} |
|
|
631 |
} |
|
|
632 |
/* Return the Option Byte program Status */ |
|
|
633 |
return status; |
|
|
634 |
} |
|
|
635 |
|
|
|
636 |
/** |
|
|
637 |
* @brief Returns the FLASH User Option Bytes values. |
|
|
638 |
* @param None |
|
|
639 |
* @retval The FLASH User Option Bytes values:IWDG_SW(Bit0), RST_STOP(Bit1) |
|
|
640 |
* and RST_STDBY(Bit2). |
|
|
641 |
*/ |
|
|
642 |
uint32_t FLASH_GetUserOptionByte(void) |
|
|
643 |
{ |
|
|
644 |
/* Return the User Option Byte */ |
|
|
645 |
return (uint32_t)(FLASH->OBR >> 2); |
|
|
646 |
} |
|
|
647 |
|
|
|
648 |
/** |
|
|
649 |
* @brief Returns the FLASH Write Protection Option Bytes Register value. |
|
|
650 |
* @param None |
|
|
651 |
* @retval The FLASH Write Protection Option Bytes Register value |
|
|
652 |
*/ |
|
|
653 |
uint32_t FLASH_GetWriteProtectionOptionByte(void) |
|
|
654 |
{ |
|
|
655 |
/* Return the Falsh write protection Register value */ |
|
|
656 |
return (uint32_t)(FLASH->WRPR); |
|
|
657 |
} |
|
|
658 |
|
|
|
659 |
/** |
|
|
660 |
* @brief Checks whether the FLASH Read Out Protection Status is set or not. |
|
|
661 |
* @param None |
|
|
662 |
* @retval FLASH ReadOut Protection Status(SET or RESET) |
|
|
663 |
*/ |
|
|
664 |
FlagStatus FLASH_GetReadOutProtectionStatus(void) |
|
|
665 |
{ |
|
|
666 |
FlagStatus readoutstatus = RESET; |
|
|
667 |
if ((FLASH->OBR & RDPRT_Mask) != (uint32_t)RESET) |
|
|
668 |
{ |
|
|
669 |
readoutstatus = SET; |
|
|
670 |
} |
|
|
671 |
else |
|
|
672 |
{ |
|
|
673 |
readoutstatus = RESET; |
|
|
674 |
} |
|
|
675 |
return readoutstatus; |
|
|
676 |
} |
|
|
677 |
|
|
|
678 |
/** |
|
|
679 |
* @brief Checks whether the FLASH Prefetch Buffer status is set or not. |
|
|
680 |
* @param None |
|
|
681 |
* @retval FLASH Prefetch Buffer Status (SET or RESET). |
|
|
682 |
*/ |
|
|
683 |
FlagStatus FLASH_GetPrefetchBufferStatus(void) |
|
|
684 |
{ |
|
|
685 |
FlagStatus bitstatus = RESET; |
|
|
686 |
|
|
|
687 |
if ((FLASH->ACR & ACR_PRFTBS_Mask) != (uint32_t)RESET) |
|
|
688 |
{ |
|
|
689 |
bitstatus = SET; |
|
|
690 |
} |
|
|
691 |
else |
|
|
692 |
{ |
|
|
693 |
bitstatus = RESET; |
|
|
694 |
} |
|
|
695 |
/* Return the new state of FLASH Prefetch Buffer Status (SET or RESET) */ |
|
|
696 |
return bitstatus; |
|
|
697 |
} |
|
|
698 |
|
|
|
699 |
/** |
|
|
700 |
* @brief Enables or disables the specified FLASH interrupts. |
|
|
701 |
* @param FLASH_IT: specifies the FLASH interrupt sources to be enabled or disabled. |
|
|
702 |
* This parameter can be any combination of the following values: |
|
|
703 |
* @arg FLASH_IT_ERROR: FLASH Error Interrupt |
|
|
704 |
* @arg FLASH_IT_EOP: FLASH end of operation Interrupt |
|
|
705 |
* @param NewState: new state of the specified Flash interrupts. |
|
|
706 |
* This parameter can be: ENABLE or DISABLE. |
|
|
707 |
* @retval None |
|
|
708 |
*/ |
|
|
709 |
void FLASH_ITConfig(uint16_t FLASH_IT, FunctionalState NewState) |
|
|
710 |
{ |
|
|
711 |
/* Check the parameters */ |
|
|
712 |
assert_param(IS_FLASH_IT(FLASH_IT)); |
|
|
713 |
assert_param(IS_FUNCTIONAL_STATE(NewState)); |
|
|
714 |
if(NewState != DISABLE) |
|
|
715 |
{ |
|
|
716 |
/* Enable the interrupt sources */ |
|
|
717 |
FLASH->CR |= FLASH_IT; |
|
|
718 |
} |
|
|
719 |
else |
|
|
720 |
{ |
|
|
721 |
/* Disable the interrupt sources */ |
|
|
722 |
FLASH->CR &= ~(uint32_t)FLASH_IT; |
|
|
723 |
} |
|
|
724 |
} |
|
|
725 |
|
|
|
726 |
/** |
|
|
727 |
* @brief Checks whether the specified FLASH flag is set or not. |
|
|
728 |
* @param FLASH_FLAG: specifies the FLASH flag to check. |
|
|
729 |
* This parameter can be one of the following values: |
|
|
730 |
* @arg FLASH_FLAG_BSY: FLASH Busy flag |
|
|
731 |
* @arg FLASH_FLAG_PGERR: FLASH Program error flag |
|
|
732 |
* @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag |
|
|
733 |
* @arg FLASH_FLAG_EOP: FLASH End of Operation flag |
|
|
734 |
* @arg FLASH_FLAG_OPTERR: FLASH Option Byte error flag |
|
|
735 |
* @retval The new state of FLASH_FLAG (SET or RESET). |
|
|
736 |
*/ |
|
|
737 |
FlagStatus FLASH_GetFlagStatus(uint16_t FLASH_FLAG) |
|
|
738 |
{ |
|
|
739 |
FlagStatus bitstatus = RESET; |
|
|
740 |
/* Check the parameters */ |
|
|
741 |
assert_param(IS_FLASH_GET_FLAG(FLASH_FLAG)) ; |
|
|
742 |
if(FLASH_FLAG == FLASH_FLAG_OPTERR) |
|
|
743 |
{ |
|
|
744 |
if((FLASH->OBR & FLASH_FLAG_OPTERR) != (uint32_t)RESET) |
|
|
745 |
{ |
|
|
746 |
bitstatus = SET; |
|
|
747 |
} |
|
|
748 |
else |
|
|
749 |
{ |
|
|
750 |
bitstatus = RESET; |
|
|
751 |
} |
|
|
752 |
} |
|
|
753 |
else |
|
|
754 |
{ |
|
|
755 |
if((FLASH->SR & FLASH_FLAG) != (uint32_t)RESET) |
|
|
756 |
{ |
|
|
757 |
bitstatus = SET; |
|
|
758 |
} |
|
|
759 |
else |
|
|
760 |
{ |
|
|
761 |
bitstatus = RESET; |
|
|
762 |
} |
|
|
763 |
} |
|
|
764 |
/* Return the new state of FLASH_FLAG (SET or RESET) */ |
|
|
765 |
return bitstatus; |
|
|
766 |
} |
|
|
767 |
|
|
|
768 |
/** |
|
|
769 |
* @brief Clears the FLASHs pending flags. |
|
|
770 |
* @param FLASH_FLAG: specifies the FLASH flags to clear. |
|
|
771 |
* This parameter can be any combination of the following values: |
|
|
772 |
* @arg FLASH_FLAG_PGERR: FLASH Program error flag |
|
|
773 |
* @arg FLASH_FLAG_WRPRTERR: FLASH Write protected error flag |
|
|
774 |
* @arg FLASH_FLAG_EOP: FLASH End of Operation flag |
|
|
775 |
* @retval None |
|
|
776 |
*/ |
|
|
777 |
void FLASH_ClearFlag(uint16_t FLASH_FLAG) |
|
|
778 |
{ |
|
|
779 |
/* Check the parameters */ |
|
|
780 |
assert_param(IS_FLASH_CLEAR_FLAG(FLASH_FLAG)) ; |
|
|
781 |
|
|
|
782 |
/* Clear the flags */ |
|
|
783 |
FLASH->SR = FLASH_FLAG; |
|
|
784 |
} |
|
|
785 |
|
|
|
786 |
/** |
|
|
787 |
* @brief Returns the FLASH Status. |
|
|
788 |
* @param None |
|
|
789 |
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG, |
|
|
790 |
* FLASH_ERROR_WRP or FLASH_COMPLETE |
|
|
791 |
*/ |
|
|
792 |
FLASH_Status FLASH_GetStatus(void) |
|
|
793 |
{ |
|
|
794 |
FLASH_Status flashstatus = FLASH_COMPLETE; |
|
|
795 |
|
|
|
796 |
if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY) |
|
|
797 |
{ |
|
|
798 |
flashstatus = FLASH_BUSY; |
|
|
799 |
} |
|
|
800 |
else |
|
|
801 |
{ |
|
|
802 |
if((FLASH->SR & FLASH_FLAG_PGERR) != 0) |
|
|
803 |
{ |
|
|
804 |
flashstatus = FLASH_ERROR_PG; |
|
|
805 |
} |
|
|
806 |
else |
|
|
807 |
{ |
|
|
808 |
if((FLASH->SR & FLASH_FLAG_WRPRTERR) != 0 ) |
|
|
809 |
{ |
|
|
810 |
flashstatus = FLASH_ERROR_WRP; |
|
|
811 |
} |
|
|
812 |
else |
|
|
813 |
{ |
|
|
814 |
flashstatus = FLASH_COMPLETE; |
|
|
815 |
} |
|
|
816 |
} |
|
|
817 |
} |
|
|
818 |
/* Return the Flash Status */ |
|
|
819 |
return flashstatus; |
|
|
820 |
} |
|
|
821 |
|
|
|
822 |
/** |
|
|
823 |
* @brief Waits for a Flash operation to complete or a TIMEOUT to occur. |
|
|
824 |
* @param Timeout: FLASH progamming Timeout |
|
|
825 |
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG, |
|
|
826 |
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT. |
|
|
827 |
*/ |
|
|
828 |
FLASH_Status FLASH_WaitForLastOperation(uint32_t Timeout) |
|
|
829 |
{ |
|
|
830 |
FLASH_Status status = FLASH_COMPLETE; |
|
|
831 |
|
|
|
832 |
/* Check for the Flash Status */ |
|
|
833 |
status = FLASH_GetStatus(); |
|
|
834 |
/* Wait for a Flash operation to complete or a TIMEOUT to occur */ |
|
|
835 |
while((status == FLASH_BUSY) && (Timeout != 0x00)) |
|
|
836 |
{ |
|
|
837 |
delay(); |
|
|
838 |
status = FLASH_GetStatus(); |
|
|
839 |
Timeout--; |
|
|
840 |
} |
|
|
841 |
if(Timeout == 0x00 ) |
|
|
842 |
{ |
|
|
843 |
status = FLASH_TIMEOUT; |
|
|
844 |
} |
|
|
845 |
/* Return the operation status */ |
|
|
846 |
return status; |
|
|
847 |
} |
|
|
848 |
|
|
|
849 |
/** |
|
|
850 |
* @brief Inserts a time delay. |
|
|
851 |
* @param None |
|
|
852 |
* @retval None |
|
|
853 |
*/ |
|
|
854 |
static void delay(void) |
|
|
855 |
{ |
|
|
856 |
__IO uint32_t i = 0; |
|
|
857 |
for(i = 0xFF; i != 0; i--) |
|
|
858 |
{ |
|
|
859 |
} |
|
|
860 |
} |
|
|
861 |
|
|
|
862 |
/** |
|
|
863 |
* @} |
|
|
864 |
*/ |
|
|
865 |
|
|
|
866 |
/** |
|
|
867 |
* @} |
|
|
868 |
*/ |
|
|
869 |
|
|
|
870 |
/** |
|
|
871 |
* @} |
|
|
872 |
*/ |
|
|
873 |
|
|
|
874 |
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ |