Air32 | 合宙Air001单片机内部FLASH读写示例
代码已经通过测试，开发环境KEIL-MDK 5.36。
测试代码
void FLASH_RdWrTest(void)
{uint32_t Address;uint32_t PageReadBuffer[FLASH_PAGE_SIZE >> 2];uint32_t PageWriteBuffer[FLASH_PAGE_SIZE >> 2];memset(PageWriteBuffer, 0XAA, sizeof(PageWriteBuffer));for(Address = 0x08003000; Address < 0x08008000; Address += FLASH_PAGE_SIZE) // 16K~32K{FLASH_Write(Address, PageWriteBuffer, sizeof(PageReadBuffer) >> 2);memset(PageReadBuffer, 0, sizeof(PageReadBuffer));FLASH_Read(Address, PageReadBuffer, sizeof(PageReadBuffer) >> 2);if(memcmp(PageReadBuffer, PageWriteBuffer, sizeof(PageReadBuffer)) == 0){printf("page[%04d] 0x%08X read & write %s \r\n", (Address - FLASH_BASE) / FLASH_PAGE_SIZE, Address, "ok");}else{printf("page[%04d] 0x%08X read & write %s \r\n", (Address - FLASH_BASE) / FLASH_PAGE_SIZE, Address, "failed");}}
}头文件
/*** @brief Create by AnKun on 2019/10/10*/#ifndef FLASH_H__
#define FLASH_H__#include "air001xx_hal.h"/// 导出函数声明
void FLASH_Init(void);
void FLASH_Read(uint32_t Address, uint32_t *Buffer, uint32_t NumToRead);
void FLASH_Write(uint32_t Address, const uint32_t *Buffer, uint32_t NumToWrite);
void FLASH_WritePage_NoCheck(uint32_t Address, const uint32_t* Buffer);
void FLASH_ErasePage(uint32_t Address);
void FLASH_SetReadProtectionState(int state);#endif // !__FLASH_H源文件
/*** @file flash.c** @brief Create by AnKun on 2023/7/20**/#include "flash.h"
#include <string.h>static uint32_t FlashBuffer[FLASH_PAGE_SIZE >> 2];void FLASH_Init(void)
{HAL_FLASH_Unlock();__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_ALL_ERRORS); /* Clear SR register */HAL_FLASH_Lock();
}void FLASH_Read(uint32_t Address, uint32_t *Buffer, uint32_t NumToRead)
{while(NumToRead--){*Buffer++ = (*((volatile unsigned int *)Address));Address += 4;}
}void FLASH_WritePage_NoCheck(uint32_t Address, const uint32_t* Buffer)
{HAL_FLASH_Lock(); //解锁HAL_FLASH_Program(FLASH_TYPEPROGRAM_PAGE, Address, (uint32_t *)Buffer);HAL_FLASH_Unlock(); //上锁
}void FLASH_ErasePage(uint32_t Address)
{uint32_t PageError = 0;FLASH_EraseInitTypeDef EraseInitStruct = {0};HAL_FLASH_Unlock();EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGEERASE;EraseInitStruct.PageAddress = Address;EraseInitStruct.NbPages = 1; /* erase nums pages. */HAL_FLASHEx_Erase(&EraseInitStruct, &PageError);HAL_FLASH_Lock();
}void FLASH_Write(uint32_t Address, const uint32_t *Buffer, uint32_t NumToWrite)
{uint32_t secpos; //页地址uint32_t secoff; //页内偏移地址(16位字计算)uint32_t secremain; //页内剩余地址(16位字计算)uint32_t i;uint32_t offaddr; //去掉0X08000000后的地址HAL_FLASH_Unlock(); //解锁offaddr = Address - FLASH_BASE; //实际偏移地址.secpos = offaddr / FLASH_PAGE_SIZE; //页地址secoff = (offaddr % FLASH_PAGE_SIZE) >> 2; //在页内的偏移(2个字节为基本单位.)secremain = (FLASH_PAGE_SIZE >> 2) - secoff; //页剩余空间大小if(NumToWrite <= secremain)secremain = NumToWrite; //不大于该页范围while(1){FLASH_Read(secpos * FLASH_PAGE_SIZE + FLASH_BASE, FlashBuffer, FLASH_PAGE_SIZE >> 2); //读出整个页的内容for(i = 0; i < (FLASH_PAGE_SIZE >> 2); i++) //校验数据{if(FlashBuffer[i] != 0XFFFFFFFF){uint32_t PageError = 0;FLASH_EraseInitTypeDef EraseInitStruct = {0};EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGEERASE;EraseInitStruct.PageAddress = Address;EraseInitStruct.NbPages = 1; /* erase nums pages. */HAL_FLASHEx_Erase(&EraseInitStruct, &PageError);break;}}for(i = 0; i < secremain; i++) //复制{FlashBuffer[i + secoff] = Buffer[i];}HAL_FLASH_Program(FLASH_TYPEPROGRAM_PAGE, secpos * FLASH_PAGE_SIZE + FLASH_BASE, (uint32_t *)FlashBuffer); //写入整个页if(NumToWrite == secremain)break; //写入结束了else//写入未结束{secpos++; //页地址增1secoff = 0; //偏移位置为0Buffer += secremain; //指针偏移Address += secremain; //写地址偏移NumToWrite -= secremain; //字节(16位)数递减if(NumToWrite > (FLASH_PAGE_SIZE >> 2)) secremain = (FLASH_PAGE_SIZE >> 2); //下一个页还是写不完else secremain = NumToWrite; //下一个页可以写完了}}HAL_FLASH_Lock(); //解锁
}void FLASH_SetReadProtectionState(int onoff)
{FLASH_OBProgramInitTypeDef OptionsBytesStruct;HAL_FLASH_Unlock();HAL_FLASH_OB_Unlock();HAL_FLASH_OBGetConfig(&OptionsBytesStruct);if(onoff){if(OptionsBytesStruct.RDPLevel == OB_RDP_LEVEL_0){OptionsBytesStruct.OptionType = OPTIONBYTE_RDP;OptionsBytesStruct.RDPLevel = OB_RDP_LEVEL_1;HAL_FLASH_OBProgram(&OptionsBytesStruct);HAL_FLASH_OB_Launch();}}else{if(OptionsBytesStruct.RDPLevel == OB_RDP_LEVEL_1){OptionsBytesStruct.OptionType = OPTIONBYTE_RDP;OptionsBytesStruct.RDPLevel = OB_RDP_LEVEL_0;HAL_FLASH_OBProgram(&OptionsBytesStruct);HAL_FLASH_OB_Launch();}}HAL_FLASH_OB_Lock();HAL_FLASH_Lock();
}void FLASH_RdWrTest(void)
{uint32_t Address;uint32_t PageReadBuffer[FLASH_PAGE_SIZE >> 2];uint32_t PageWriteBuffer[FLASH_PAGE_SIZE >> 2];memset(PageWriteBuffer, 0XAA, sizeof(PageWriteBuffer));for(Address = 0x08003000; Address < 0x08008000; Address += FLASH_PAGE_SIZE) // 16K~32K{FLASH_Write(Address, PageWriteBuffer, sizeof(PageReadBuffer) >> 2);memset(PageReadBuffer, 0, sizeof(PageReadBuffer));FLASH_Read(Address, PageReadBuffer, sizeof(PageReadBuffer) >> 2);if(memcmp(PageReadBuffer, PageWriteBuffer, sizeof(PageReadBuffer)) == 0){printf("page[%04d] 0x%08X read & write %s \r\n", (int)((Address - FLASH_BASE) / FLASH_PAGE_SIZE), Address, "ok");}else{printf("page[%04d] 0x%08X read & write %s \r\n", (int)((Address - FLASH_BASE) / FLASH_PAGE_SIZE), Address, "failed");}}
}
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