void flash_erase_range(uint32_t start_address, uint32_t end_address) { uint32_t flash_address = start_address; while (flash_address <= end_address) { volatile uint16_t *flash = (volatile uint16_t *)flash_address; flash[0x5555] = 0xAAAA; flash[0x2AAA] = 0x5555; flash[0x5555] = 0x8080; flash[0x5555] = 0xAAAA; flash[0x2AAA] = 0x5555; flash[0x0000] = 0x3030; __disable_irq(); delay_us(40000); __enable_irq(); flash_address += SectorSize; } } // 擦除0x200000到0x200005 void erase_flash_range() { uint32_t start_address = 0x200000; uint32_t end_address = 0x200005; flash_erase_range(start_address, end_address); }逐句解释代码

int main(void) { image_InfoStr image_Info; uint32_t index=0; uint32_t WriteAddress=Application1Address; uint32_t ReadAddress=Application2Address; Misc_Init(); #if DBG_ENABLE UART2_Config(); #endif __disable_irq(); index=0; image_Info.active=0x00; Flash_Read(Applica2flagAddress,(u8 )&image_Info,sizeof(image_Info)); if(image_Info.magic==IMAGE_MAGIC && image_Info.inmagic==IMAGE_INMAGIC && image_Info.active==IMAGE_INFO_ACTIVE && image_Info.size<=APP_FLASH_SIZE){ //iap image ok,copy to app area if((((__IO uint32_t)Application2Address) & 0x2FFE0000 ) != 0x20000000){ FLASH_Erase_OnePage(Applica2flagAddress);//Erase app2 flag goto exit1; } while(index<image_Info.size){ WriteAddress=Application1Address+index; ReadAddress=Application2Address+index; if((WriteAddress&0x1FF)==0x000) FLASH_Erase_OnePage(WriteAddress); Flash_Read(ReadAddress,tmp_buf,FLASH_PAGE_SIZE); FLASH_Write(WriteAddress,tmp_buf,FLASH_PAGE_SIZE); index+=FLASH_PAGE_SIZE; }; FLASH_Erase_OnePage(Applica2flagAddress);//Erase app2 flag } exit1: if ((((__IO uint32_t)Application1Address) & 0x2FFE0000 ) == 0x20000000) { / Jump to user application / JumpAddress = (__IO uint32_t) (Application1Address + 4); Jump_To_Application = (pFunction) JumpAddress; / Initialize user application's Stack Pointer / __set_MSP((__IO uint32_t*) Application1Address); Jump_To_Application(); } else{ while(1){ Misc_LedDisplayError(); } } }

这段代码是一个简单的主函数，主要用于从Flash中读取应用程序的信息并进行一些操作，然后跳转到用户应用程序。具体流程如下： 1. 初始化一些外设（Misc_Init()函数）和调试信息（UART2_Config()函数）。 2. 禁用...

uint8_t W25QXX_BUFFER[4096]; void W25QXX_Write(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite) { uint32_t secpos; uint16_t secoff; uint16_t secremain; uint16_t i; secpos=WriteAddr/4096;//扇区地址 0~511 for w25x16 secoff=WriteAddr%4096;//在扇区内的偏移 secremain=4096-secoff;//扇区剩余空间大小 if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//不大于4096个字节 while(1) { W25QXX_Read(W25QXX_BUFFER,secpos4096,4096);//读出整个扇区的内容 for(i=0;i<secremain;i++)//校验数据 { if(W25QXX_BUFFER[secoff+i]!=0XFF)break;//需要擦除 } if(i<secremain)//需要擦除 { W25QXX_Erase_Sector(secpos);//擦除这个扇区 for(i=0;i<secremain;i++)//复制 { W25QXX_BUFFER[i+secoff]=pBuffer[i]; } W25QXX_Write_NoCheck(W25QXX_BUFFER,secpos4096,4096);//写入整个扇区 } else W25QXX_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了的,直接写入扇区剩余区间. if(NumByteToWrite==secremain)break;//写入结束了 else//写入未结束 { secpos++;//扇区地址增1 secoff=0;//偏移位置为0 pBuffer+=secremain; //指针偏移 WriteAddr+=secremain;//写地址偏移 NumByteToWrite-=secremain;//字节数递减 if(NumByteToWrite>4096)secremain=4096;//下一个扇区还是写不完 else secremain=NumByteToWrite;//下一个扇区可以写完了 } }; }

这段代码是用于将数据写入W25QXX芯片中的函数。下面是对该函数的解析： ...为了正确使用该函数，你需要确保已经正确引入相关的头文件，并实现W25QXX_Read、W25QXX_Erase_Sector和W25QXX_Write_NoCheck等函数。

stm32f03 flash_erase 函数发我一个

void flash_erase(uint32_t sector_number) { FLASH_Unlock(); FLASH_ErasePage(sector_number * FLASH_PAGE_SIZE); FLASH_Lock(); } 请注意，在使用 FLASH_ErasePage 函数擦除FLASH扇区之前，必须先解锁...

uint8 FLASH_Write(void) { int i;gpio_set(C7,1); flash_erase_page(SECTION_INDEX, PAGE_INDEX); memset(data_buffer, 0x00, sizeof(data_buffer)); for(i=1;i<=Val_Num;i++) //写入缓存数组 C_Menu(i,2,0,0); gpio_set(C7,0); return flash_page_program(SECTION_INDEX, PAGE_INDEX, data_buffer, Val_Num); }

这段代码定义了一个函数 FLASH_Write，通过调用该函数可以将 data_buffer 中的数据写入到 flash 存储器中，具体流程如下： 1. 通过 gpio_set(C7,1) 将 C7 引脚设置为高电平，擦除 flash 存储器中 SECTION_...

inline void Convert_8Bits_To_32Bits(vector<uint8_t>& Des,uint32_t &nNum) { nNum = Des.at(0) << 0; nNum |= Des.at(1) << 18; nNum |= Des.at(2) << 28; nNum |= Des.at(3) << 3*8; Des.erase(Des.begin(),Des.begin()+4); }

这段代码的作用是将一个长度为4的vector<uint8_t>转换成一个uint32_t类型的数。具体来说，它将输入vector中的前4个元素（即下标为0到3的元素）分别左移0、8、16、24位，然后按位或运算合并成一个uint32_t类型的数，...

void S1mmeSession::CheckPagingImsiMap() { uint32_t ssss = 0; S1APNode* p_node = (S1APNode)(p_imsi_paging_map_->GetHead()); g_kqi_chk_map_too_long = 0; memset(g_kqi_chk_map_not_empty, 0, sizeof(g_kqi_chk_map_not_empty)); while(1) { if(p_node == NULL) break; KQIMap& kmap = p_node->GetKqiMap(); { uint32_t a = kmap.size(); if (a < kKqiLocMax) { g_kqi_chk_map_not_empty[a]++; } else { g_kqi_chk_map_too_long++; } } for (KQI_Iter iter=kmap.begin(); iter != kmap.end(); ++iter) { S1MMEKQI p_kqi = iter->second; assert(p_kqi != NULL); g_kn_tmp_map_.erase(p_kqi); } p_node = (S1APNode)(p_imsi_paging_map_->Next()); ++ssss; } uint8_t buf[5120] = {0}; uint32_t offset = 0; for (uint32_t i=0; i<kKqiLocMax; ++i) { offset += sprintf((char)(buf + offset), "[%u]=%lu,", i, g_kqi_chk_map_not_empty[i]); if (offset > 4096) break; } LogInfo("Session status - S1mme: kqi chk paging imsi map too_length: %lu, others: %s", g_kqi_chk_map_too_long, buf); }什么意思

这段代码是一个函数，函数名为 CheckPagingImsiMap，主要作用是进行一些对 p_imsi_paging_map_ 中数据的检查和...函数中还用到了一些 C++ STL 中的函数和操作，例如 size()、begin()、end()、erase() 等。

void S1mmeSession::CheckPagingStmsiMap() { uint32_t ssss = 0; S1APNode* p_node = (S1APNode)(p_stmsi_paging_map_->GetHead()); g_kqi_chk_map_too_long = 0; memset(g_kqi_chk_map_not_empty, 0, sizeof(g_kqi_chk_map_not_empty)); while(1) { if(p_node == NULL) break; KQIMap& kmap = p_node->GetKqiMap(); { uint32_t a = kmap.size(); if (a < kKqiLocMax) { g_kqi_chk_map_not_empty[a]++; } else { g_kqi_chk_map_too_long++; } } for (KQI_Iter iter=kmap.begin(); iter != kmap.end(); ++iter) { S1MMEKQI p_kqi = iter->second; assert(p_kqi != NULL); g_kn_tmp_map_.erase(p_kqi); } p_node = (S1APNode)(p_stmsi_paging_map_->Next()); ++ssss; } uint8_t buf[5120] = {0}; uint32_t offset = 0; for (uint32_t i=0; i<kKqiLocMax; ++i) { offset += sprintf((char)(buf + offset), "[%u]=%lu,", i, g_kqi_chk_map_not_empty[i]); if (offset > 4096) break; } LogInfo("Session status - S1mme: kqi chk paging stmsi map too_length: %lu, others: %s", g_kqi_chk_map_too_long, buf); }什么意思

这段代码是另一个函数，函数名为 CheckPagingStmsiMap，与前一个函数 CheckPagingImsiMap 类似，也是对数据结构 p_stmsi_paging_map_ 中数据的检查和统计，并将结果打印输出日志。该函数的实现与 ...

STM32g单片机HAL库函数HAL_FLASHEx_Erase代码及解析

HAL_StatusTypeDef HAL_FLASHEx_Erase(FLASH_EraseInitTypeDef *pEraseInit, uint32_t *SectorError) { uint32_t nbSectorsToErase = 0U; uint32_t sectorErrorTmp; uint32_t sectorErrorMask; HAL_Status...

HAL_FLASHEx_Erase函数解析

HAL_StatusTypeDef HAL_FLASHEx_Erase(FLASH_EraseInitTypeDef *pEraseInit, uint32_t *SectorError); 该函数需要传入一个FLASH_EraseInitTypeDef类型的参数pEraseInit，该结构体定义了要擦除的Flash扇区的起始...

采用泛型编程设计一个队列管理器，要求支持uint8_t,uint16_t,uint32_t等类型，维护空、满队列，实现数据的交换

void push(T data) { if (queue.size() ) { queue.push_back(data); } else { std::cout !" ; } } T pop() { if (queue.size() > 0) { T data = queue[0]; queue.erase(queue.begin()); return data; ...

void IntersectionInfoCache::get_node_info( const RoadLinkInfo* curlink, NodeInfo& nodeInfo, bool start ) //获取节点信息 { TopoLinkItem* outlinklist = start ? curlink->sTopoLinks.outTopoItems : curlink->eTopoLinks.outTopoItems; uint8_t outlinkCount = start ? curlink->sTopoLinks.outCount : curlink->eTopoLinks.outCount; for ( int i = 0; i < outlinkCount; ++i ) { uint32_t out_index = static_cast< int32 >( outlinklist[ i ].linkIdx ); uint8_t out_direction = ( outlinklist[ i ].attr & 0x01 ); nodeInfo.outlinks.emplace_back( LinkSymbol( out_index, out_direction ) ); const RoadLinkInfo* outlink = RGDataManagerInstance->GetRoadInfoPtr( out_index ); if ( outlink == nullptr ) continue; TopoLinkItem* inlinklist = out_direction ? outlink->eTopoLinks.inTopoItems : outlink->sTopoLinks.inTopoItems; uint8_t inlinkCount = out_direction ? outlink->eTopoLinks.inCount : outlink->sTopoLinks.inCount; for ( int j = 0; j < inlinkCount; ++j ) { //获取所有脱出路的进入路 uint32_t in_index = static_cast< int32 >( inlinklist[ j ].linkIdx ); uint8_t in_direction = ( ( inlinklist[ j ].attr & ( 0x01 ) ) ^ ( 0x01 ) ); nodeInfo.inlinks.emplace_back( LinkSymbol( in_index, in_direction ) ); } } std::sort( nodeInfo.inlinks.begin(), nodeInfo.inlinks.end() ); nodeInfo.inlinks.erase(std::unique( nodeInfo.inlinks.begin(), nodeInfo.inlinks.end() ), nodeInfo.inlinks.end() ); std::sort( nodeInfo.outlinks.begin(), nodeInfo.outlinks.end() ); nodeInfo.outlinks.erase(std::unique( nodeInfo.outlinks.begin(), nodeInfo.outlinks.end() ), nodeInfo.outlinks.end() ); }

这段代码看起来是一个函数，函数名为 get_node_info，接受三个参数：curlink 为指向 RoadLinkInfo 类型的指针，nodeInfo 为引用类型的 NodeInfo 对象，start 为布尔类型。函数的作用是获取节点信息，...

HAL_FLASHEx_Erase函数代码及解析

HAL_StatusTypeDef HAL_FLASHEx_Erase(FLASH_EraseInitTypeDef *pEraseInit, uint32_t *SectorError) { uint32_t NbSectorsToErase; uint32_t SectorErrorTmp; uint32_t SECTORErrorMask; HAL_StatusTypeDef ...

//擦除整个芯片 //等待时间超长... void W25QXX_Erase_Chip(void) { W25QXX_Write_Enable(); //SET WEL W25QXX_Wait_Busy(); SPI2_CS_OFF; //使能器件 xmit_spi(W25X_ChipErase); //发送片擦除命令 while(SSIBusy(SSI3_BASE)) {} SPI2_CS_ON; //取消片选 W25QXX_Wait_Busy(); //等待芯片擦除结束 }将这段函数转换成MK22FN512VLH12单片机使用官方库的fsl_dspi.h文件

void W25QXX_Erase_Chip(void) { uint8_t status = 0; dspi_transfer_t transfer = {0}; // 初始化传输结构体 W25QXX_Write_Enable(); // 先使能写使能锁存器 transfer.txData = (uint8_t[]){W25X_ChipErase}; ...

解释一下这段代码void erase_wifi(char* ssid) { int i = 0; uint8_t is_wifi_exist = 0; if (NULL == ssid || 0 == strcmp(ssid, "")) { wifi_error("ssid is NULL or ssid empty"); goto exit; } for (i = 0; i < s_wifi_list->wifi_cnt; i++) { if (0 == strcmp(s_wifi_list->wifi_info[i].ssid, ssid)) { is_wifi_exist = 1; break; } } OS_MutexLock(&record_wifi_list_opt_mutex, OS_WAIT_FOREVER); if (!is_wifi_exist) { wifi_error("wifi [%s] not exist.", ssid); goto exit; } else { app_wifi_set_erase_wifi_info(s_wifi_list->wifi_info[i].ssid, s_wifi_list->wifi_info[i].pwd); strncpy(s_wifi_list->wifi_info[i].ssid, s_wifi_list->wifi_info[s_wifi_list->wifi_cnt - 1].ssid, MAX_SSID_LEN); strncpy(s_wifi_list->wifi_info[i].pwd, s_wifi_list->wifi_info[s_wifi_list->wifi_cnt - 1].pwd, MAX_PWD_LEN); memset(s_wifi_list->wifi_info[s_wifi_list->wifi_cnt - 1].ssid, 0, MAX_SSID_LEN); memset(s_wifi_list->wifi_info[s_wifi_list->wifi_cnt - 1].pwd, 0, MAX_PWD_LEN); if (s_wifi_list->wifi_cnt == WIFI_INFO_CNT) { s_wifi_list->write_idx = 9; } else { s_wifi_list->write_idx -= 1; } s_wifi_list->wifi_cnt -= 1; } #if CFG_USE_LFS _wifi_info_save_to_lfs(); #else _wifi_info_save(); #endif exit: OS_MutexUnlock(&record_wifi_list_opt_mutex); return; }

如果找到了匹配的Wi-Fi网络，函数会使用app_wifi_set_erase_wifi_info函数设置要删除的Wi-Fi网络的信息，并将该网络信息替换为数组中最后一个Wi-Fi网络的信息。然后，将最后一个Wi-Fi网络的信息清空。接下来，根据...

void S1mmeSession::UpdateUserDataIMSI(S1APNode* p_node, uint64_t imsi) { SPUserInfo& sp_local_user_info = p_node->GetUserInfo(); if (0==imsi) { return; } #if 1 sp_local_user_info->SetIMSI(imsi); if (IsImsiAttach() && sp_local_user_info->HasSTMSI()) { ue_stmsi_map_.erase(StmsiWithMmegi_T(sp_local_user_info->GetSTMSI())); DeleteFromStmsiTimeoutMap(sp_local_user_info->GetSTMSI()); sp_local_user_info->flag_.stmsi = false; sp_local_user_info->index_.stmsi =0; }什么意思

这也是一段 C++ 代码，该函数用于更新用户的 IMSI 信息。具体实现是，首先从 S1AP 节点中获取本地用户信息（即当前用户信息），然后判断是否需要更新 IMSI 信息。如果 IMSI 为 0，则直接返回。如果 IMSI 不为 0，则...

uint64_t S1mmeSession::UpdateUserDataSTMSIChange(S1APNode* p_node, uint64_t stmsi) { if(!stmsi) return 0; uint64_t old_stmsi = 0; //如果stmsi没有改变, 则直接返回 SPUserInfo& sp_local_user_info = p_node->GetUserInfo(); if (sp_local_user_info->HasSTMSI() && sp_local_user_info->GetSTMSI() == stmsi) { return old_stmsi; } //删除 old stmsi if (sp_local_user_info->HasSTMSI()) { old_stmsi = sp_local_user_info->GetSTMSI(); STMSI_Iter iter = ue_stmsi_map_.find(old_stmsi); if (iter != ue_stmsi_map_.end()) { ue_stmsi_map_.erase(iter); } DeleteFromStmsiTimeoutMap(old_stmsi); } //删除可能的 paging 干扰 StmsiWithMmegi_T old_stmsi_key(old_stmsi); S1APNode** pp_paging = p_stmsi_paging_map_->GetData(old_stmsi_key); if (pp_paging != NULL) { if (handle_session_version_ == S1MME_SESSION_VERSION_CHINA_TELECOM) { CtOutputNode(pp_paging, false); } else { (pp_paging)->DeletePagingKqi(); } p_stmsi_paging_map_->DeleteData(old_stmsi_key, p_s1ap_node_allocator_); } StmsiWithMmegi_T new_stmsi_key(stmsi); pp_paging = p_stmsi_paging_map_->GetData(new_stmsi_key); if (pp_paging != NULL) { if(handle_session_version_ == S1MME_SESSION_VERSION_CHINA_TELECOM) { CtOutputNode(pp_paging, false); } else { (pp_paging)->DeletePagingKqi(); } p_stmsi_paging_map_->DeleteData(new_stmsi_key, p_s1ap_node_allocator_); } //删除可能的 new_stmsi 干扰 STMSI_Iter iter = ue_stmsi_map_.find(stmsi); if (iter != ue_stmsi_map_.end()) { iter->second->flag_.stmsi = false; iter->second->index_.stmsi =0; ue_stmsi_map_.erase(iter); } UpdateFromStmsiTimeoutMap(stmsi, current_time_.tv_sec, true); //插入 new_stmsi(local user info) ue_stmsi_map_.insert(std::make_pair(stmsi, sp_local_user_info)); sp_local_user_info->SetSTMSI(stmsi); return old_stmsi; }什么意思

函数接受两个参数，一个是 S1APNode 指针，一个是 uint64_t 类型的新 STMSI 值。函数首先检查新 STMSI 是否为 0，如果是则直接返回。然后检查新 STMSI 是否与原来的 STMSI 相同，如果相同则也直接返回。如果新 STMSI...

李白高力士脱靴李白贺知章告别课本剧.pptx

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stm32f03 flash_erase 函数发我一个

inline void Convert_8Bits_To_32Bits(vector<uint8_t>& Des,uint32_t &nNum) { nNum = Des.at(0) << 0; nNum |= Des.at(1) << 18; nNum |= Des.at(2) << 28; nNum |= Des.at(3) << 3*8; Des.erase(Des.begin(),Des.begin()+4); }