STM32F4--FLASH读写demo
2014-02-22 21:52
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最近在写机器人的姿态解算,需要把一些数据保存到stm32f4的内部Flash中。于是调了一下午Flash,整理出了下面这个demo程序。发现stm32f4的功能还挺强的,
8位、16位、32位、64位的数据都能读写。而且还能写入负数,虽然库里提供的函数写数据的类型是无符号的,我也不知道这是什么原因。
flash.c
flash.h
usart.c
usart.h
main.c
8位、16位、32位、64位的数据都能读写。而且还能写入负数,虽然库里提供的函数写数据的类型是无符号的,我也不知道这是什么原因。
flash.c
#include "flash.h" /**************************************************************************** * 功 能: 获取地址Address对应的sector编号 * 入口参数:地址 * 出口参数:sector编号 * 说 明:无 * 调用方法:无 ****************************************************************************/ uint16_t Flash_GetSector(uint32_t Address) { uint16_t sector = 0; if((Address < ADDR_FLASH_SECTOR_1) && (Address >= ADDR_FLASH_SECTOR_0)) { sector = FLASH_Sector_0; } else if((Address < ADDR_FLASH_SECTOR_2) && (Address >= ADDR_FLASH_SECTOR_1)) { sector = FLASH_Sector_1; } else if((Address < ADDR_FLASH_SECTOR_3) && (Address >= ADDR_FLASH_SECTOR_2)) { sector = FLASH_Sector_2; } else if((Address < ADDR_FLASH_SECTOR_4) && (Address >= ADDR_FLASH_SECTOR_3)) { sector = FLASH_Sector_3; } else if((Address < ADDR_FLASH_SECTOR_5) && (Address >= ADDR_FLASH_SECTOR_4)) { sector = FLASH_Sector_4; } else if((Address < ADDR_FLASH_SECTOR_6) && (Address >= ADDR_FLASH_SECTOR_5)) { sector = FLASH_Sector_5; } else if((Address < ADDR_FLASH_SECTOR_7) && (Address >= ADDR_FLASH_SECTOR_6)) { sector = FLASH_Sector_6; } else if((Address < ADDR_FLASH_SECTOR_8) && (Address >= ADDR_FLASH_SECTOR_7)) { sector = FLASH_Sector_7; } else if((Address < ADDR_FLASH_SECTOR_9) && (Address >= ADDR_FLASH_SECTOR_8)) { sector = FLASH_Sector_8; } else if((Address < ADDR_FLASH_SECTOR_10) && (Address >= ADDR_FLASH_SECTOR_9)) { sector = FLASH_Sector_9; } else if((Address < ADDR_FLASH_SECTOR_11) && (Address >= ADDR_FLASH_SECTOR_10)) { sector = FLASH_Sector_10; } else/*(Address < FLASH_END_ADDR) && (Address >= ADDR_FLASH_SECTOR_11))*/ { sector = FLASH_Sector_11; } return sector; } /**************************************************************************** * 功 能: 擦除指定扇区 * 入口参数:SectorNum 扇区号 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_EraseSector(uint16_t SectorNum) { FLASH_Unlock(); FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR); if (FLASH_EraseSector(SectorNum, VoltageRange_3) != FLASH_COMPLETE) while (1); FLASH_Lock(); } /**************************************************************************** * 功 能: 写入长度为length的32位数据 * 入口参数:address:地址 length: 数据长度 data_32:要写入的数据指针 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Write32BitDatas(uint32_t address, uint16_t length, int32_t* data_32) { uint16_t StartSector, EndSector,i; FLASH_Unlock(); //解锁FLASH后才能向FLASH中写数据。 FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR); StartSector = Flash_GetSector(address); //获取FLASH的Sector编号 EndSector = Flash_GetSector(address+4*length); for (i = StartSector; i < EndSector; i += 8) //每次FLASH编号增加8,可参考上边FLASH Sector的定义。 { if (FLASH_EraseSector(i, VoltageRange_3) != FLASH_COMPLETE) while (1); } for(i=0; i<length; i++) { if (FLASH_ProgramWord(address, data_32[i]) == FLASH_COMPLETE) //将DATA_32写入相应的地址。 { address = address + 4; } else { while (1); } } FLASH_Lock(); //读FLASH不需要FLASH处于解锁状态。 } /**************************************************************************** * 功 能: 读取长度为length的32位数据 * 入口参数:address:地址 length: 数据长度 data_32 指向读出的数据 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Read32BitDatas(uint32_t address, uint16_t length, int32_t* data_32) { uint8_t i; for(i=0; i<length; i++) { data_32[i]=*(__IO int32_t*)address; address=address + 4; } } /**************************************************************************** * 功 能: 写入长度为length的16位数据 * 入口参数:address:地址 length: 数据长度 data_16:要写入的数据指针 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Write16BitDatas(uint32_t address, uint16_t length, int16_t* data_16) { uint16_t StartSector, EndSector,i; FLASH_Unlock(); //解锁FLASH后才能向FLASH中写数据。 FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR); StartSector = Flash_GetSector(address); //获取FLASH的Sector编号 EndSector = Flash_GetSector(address+2*length); for (i = StartSector; i < EndSector; i += 8) //每次FLASH编号增加8,可参考上边FLASH Sector的定义。 { if (FLASH_EraseSector(i, VoltageRange_3) != FLASH_COMPLETE) while (1); } for(i=0; i<length; i++) { if (FLASH_ProgramHalfWord(address, data_16[i]) == FLASH_COMPLETE) { address = address + 2; } else { while (1); } } FLASH_Lock(); //读FLASH不需要FLASH处于解锁状态。 } /**************************************************************************** * 功 能: 读取长度为length的16位数据 * 入口参数:address:地址 length: 数据长度 data_16 指向读出的数据 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Read16BitDatas(uint32_t address, uint16_t length, int16_t* data_16) { uint8_t i; for(i=0; i<length; i++) { data_16[i]=*(__IO int16_t*)address; address=address + 2; } } /**************************************************************************** * 功 能: 写入长度为length的8位数据 * 入口参数:address:地址 length: 数据长度 data_8:要写入的数据指针 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Write8BitDatas(uint32_t address, uint16_t length, int8_t* data_8) { uint16_t StartSector, EndSector,i; FLASH_Unlock(); //解锁FLASH后才能向FLASH中写数据。 FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR|FLASH_FLAG_PGSERR); StartSector = Flash_GetSector(address); //获取FLASH的Sector编号 EndSector = Flash_GetSector(address+length); for (i = StartSector; i < EndSector; i += 8) //每次FLASH编号增加8,可参考上边FLASH Sector的定义。 { if (FLASH_EraseSector(i, VoltageRange_3) != FLASH_COMPLETE) while (1); } for(i=0; i<length; i++) { if (FLASH_ProgramByte(address, data_8[i]) == FLASH_COMPLETE) { address++; } else { while (1); } } FLASH_Lock(); //读FLASH不需要FLASH处于解锁状态。 } /**************************************************************************** * 功 能: 读取长度为length的8位数据 * 入口参数:address:地址 length: 数据长度 data_8 指向读出的数据 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void Flash_Read8BitDatas(uint32_t address, uint16_t length, int8_t* data_8) { uint8_t i; for(i=0; i<length; i++) { data_8[i]=*(__IO int8_t*)address; address++; } }
flash.h
#ifndef __FLASH_H__ #define __FLASH_H__ #include "stm32f4xx.h" /* Base address of the Flash sectors */ #define ADDR_FLASH_SECTOR_0 ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbytes */ #define ADDR_FLASH_SECTOR_1 ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbytes */ #define ADDR_FLASH_SECTOR_2 ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbytes */ #define ADDR_FLASH_SECTOR_3 ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbytes */ #define ADDR_FLASH_SECTOR_4 ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbytes */ #define ADDR_FLASH_SECTOR_5 ((uint32_t)0x08020000) /* Base @ of Sector 5, 128 Kbytes */ #define ADDR_FLASH_SECTOR_6 ((uint32_t)0x08040000) /* Base @ of Sector 6, 128 Kbytes */ #define ADDR_FLASH_SECTOR_7 ((uint32_t)0x08060000) /* Base @ of Sector 7, 128 Kbytes */ #define ADDR_FLASH_SECTOR_8 ((uint32_t)0x08080000) /* Base @ of Sector 8, 128 Kbytes */ #define ADDR_FLASH_SECTOR_9 ((uint32_t)0x080A0000) /* Base @ of Sector 9, 128 Kbytes */ #define ADDR_FLASH_SECTOR_10 ((uint32_t)0x080C0000) /* Base @ of Sector 10, 128 Kbytes */ #define ADDR_FLASH_SECTOR_11 ((uint32_t)0x080E0000) /* Base @ of Sector 11, 128 Kbytes */ #define FLASH_USER_START_ADDR ADDR_FLASH_SECTOR_9 //用户起始地址,暂定为第十个扇区的起始地址 //API uint16_t Flash_GetSector(uint32_t Address); void Flash_EraseSector(uint16_t SectorNum); void Flash_Write32BitDatas(uint32_t address, uint16_t length, int32_t* data_32); void Flash_Read32BitDatas(uint32_t address, uint16_t length, int32_t* data_32); void Flash_Write16BitDatas(uint32_t address, uint16_t length, int16_t* data_16); void Flash_Read16BitDatas(uint32_t address, uint16_t length, int16_t* data_16); void Flash_Write8BitDatas(uint32_t address, uint16_t length, int8_t* data_8); void Flash_Read8BitDatas(uint32_t address, uint16_t length, int8_t* data_8); #endif
usart.c
#include "usart.h" /**************************************************************************** * 名 称:void USART_Configuration(void) * 功 能: UART4配置 * 入口参数:无 * 出口参数:无 * 说 明:无 * 调用方法:无 ****************************************************************************/ void USART_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_UART4); GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_UART4); USART_InitStructure.USART_BaudRate = 19200; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(UART4,&USART_InitStructure); USART_Cmd(UART4,ENABLE); } /**************************************************************************** * 名 称:int fputc(int ch, FILE *f) * 功 能: 重定向printf到串口 * 入口参数: 略 * 出口参数:略 * 说 明:无 * 调用方法:无 ****************************************************************************/ int fputc(int ch, FILE *f) { while (USART_GetFlagStatus(UART4, USART_FLAG_TC) == RESET); USART_SendData(UART4, (uint8_t) ch); while (USART_GetFlagStatus(UART4, USART_FLAG_TC) == RESET); return ch; } /**************************************************************************** * 名 称:int fgetc(FILE *f) * 功 能: 重定向scanf到串口 * 入口参数:略 * 出口参数:略 * 说 明:无 * 调用方法:无 ****************************************************************************/ int fgetc(FILE *f) { int ch; while (USART_GetFlagStatus(UART4, USART_FLAG_RXNE) == RESET); ch = USART_ReceiveData(UART4); while (USART_GetFlagStatus(UART4, USART_FLAG_TC) == RESET); USART_SendData(UART4, (uint8_t) ch); return ch; }
usart.h
#ifndef __PRINTF_H__ #define __PRINTF_H__ #include <stdio.h> #include "stm32f4xx.h" //供调用的API void USART_Configuration(void); #endif
main.c
#include "stm32f4xx.h" #include "flash.h" #include "usart.h" void RCC_Configuration(void) { RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); /* Enable GPIO clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); /* Enable USART clock */ } int32_t data_32_1[]={-1,-2,-3,-4,-5,-6,-7,-8,-9,-10}; int32_t data_32_2[10]; int16_t data_16_1[]={1,2,3,4,5,6,7,8,9,10}; int16_t data_16_2[]={0,0,0,0,0,0,0,0,0,0}; int8_t data_8_1[]={1,2,3,4,5,6,7,8,9,10}; int8_t data_8_2[]={0,0,0,0,0,0,0,0,0,0}; int main() { uint8_t j; RCC_Configuration(); USART_Configuration(); printf("\r\n32位数据:"); printf("\r\n擦除前:"); Flash_Read32BitDatas(FLASH_USER_START_ADDR,10,data_32_2); for(j=0; j<10; j++) { printf("%d ",data_32_2[j]); } Flash_EraseSector(FLASH_Sector_9); printf("\r\n擦除后:"); Flash_Read32BitDatas(FLASH_USER_START_ADDR,10,data_32_2); for(j=0; j<10; j++) { printf("%d ",data_32_2[j]); } printf("\r\n读写Flash后:"); Flash_Write32BitDatas(FLASH_USER_START_ADDR, 10, data_32_1); Flash_Read32BitDatas(FLASH_USER_START_ADDR,10,data_32_2); for(j=0; j<10; j++) { printf("%d ",data_32_2[j]); } printf("\r\n16位数据:"); printf("\r\n擦除前:"); Flash_Read16BitDatas(FLASH_USER_START_ADDR,10,data_16_2); for(j=0; j<10; j++) { printf("%d ",data_16_2[j]); } Flash_EraseSector(FLASH_Sector_9); printf("\r\n擦除后:"); Flash_Read16BitDatas(FLASH_USER_START_ADDR,10,data_16_2); for(j=0; j<10; j++) { printf("%d ",data_16_2[j]); } printf("\r\n读写Flash后:"); Flash_Write16BitDatas(FLASH_USER_START_ADDR, 10, data_16_1); Flash_Read16BitDatas(FLASH_USER_START_ADDR,10,data_16_2); for(j=0; j<10; j++) { printf("%d ",data_16_2[j]); } printf("\r\n8位数据:"); printf("\r\n擦除前:"); Flash_Read8BitDatas(FLASH_USER_START_ADDR,10,data_8_2); for(j=0; j<10; j++) { printf("%d ",data_8_2[j]); } Flash_EraseSector(FLASH_Sector_9); printf("\r\n擦除后:"); Flash_Read8BitDatas(FLASH_USER_START_ADDR,10,data_8_2); for(j=0; j<10; j++) { printf("%d ",data_8_2[j]); } printf("\r\n读写Flash后:"); Flash_Write8BitDatas(FLASH_USER_START_ADDR, 10, data_8_1); Flash_Read8BitDatas(FLASH_USER_START_ADDR,10,data_8_2); for(j=0; j<10; j++) { printf("%d ",data_8_2[j]); } while(1); }
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