STM32F103C8T6(HAL库函数 - 内部Flash操作)

简介

STM32F103C8T6 内部Flash 为 64KB，本次将对他多余空间进行读写。

介绍

数据手册下载

STM32F103x8/STM32F103xB 数据手册

包含Flash Memory Page分布

STM32F设备命名

设备容量类型

中容量类型

内部空间介绍

64 KBytes大小

Flash Memory 从 0x0800 0000 ~ 0x0801 FFFF

页分布1K每页, STM32F103C8T6 只有64KByte, 那就是64页

代码

使用
controllerstech Flash Program Code

复制 FLASH_PAGE_F1.h 和 FLASH_PAGE_F1.c到项目中

FLASH_PAGE_F1.h 加入宏定义

c 复制代码

#define FLASH_START_ADDRESS (0x08000000 + FLASH_PAGE_SIZE * 20) //0~20页这20K用于存储你的程序
#define FLASH_MAX_PAGE_NUM (64-1-20) // 0 ~ (63-20) 是最大的页码

FLASH_PAGE_F1.c 修改

c 复制代码

static uint32_t GetPage(uint32_t Address)
{
  for (int indx=0; indx<(FLASH_MAX_PAGE_NUM+1); indx++)
  {
	  if((Address < (FLASH_START_ADDRESS + (FLASH_PAGE_SIZE *(indx+1))) ) && (Address >= (FLASH_START_ADDRESS + FLASH_PAGE_SIZE*indx)))
	  {
		  return (FLASH_START_ADDRESS + FLASH_PAGE_SIZE*indx);
	  }
  }

  return 0;
}

测试代码

main.c

c 复制代码

char *data = "hello FLASH from ControllerTech\
			  This is a test to see how many words can we work with";

uint32_t data2[] = {0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9};

uint32_t Rx_Data[30];

char string[100];

int number = 123;

float val = 123.456;

float RxVal;


int main()
{
...
printf("Hello World!\r\n");
	Flash_Write_Data(GetPageFromPageNum(0) , (uint32_t *)data2, 9);
	Flash_Read_Data(GetPageFromPageNum(0) , Rx_Data, 10);
	printf ("RxData: { ");
	for ( int i = 0; i < 9; ++i )
	{
		printf ("0x%X ", Rx_Data[i]);
	}
	printf ("};\r\n");
	
	int numofwords = (strlen(data)/4)+((strlen(data)%4)!=0);
  Flash_Write_Data(GetPageFromPageNum(1) , (uint32_t *)data, numofwords);
  Flash_Read_Data(GetPageFromPageNum(1) , Rx_Data, numofwords);
  Convert_To_Str(Rx_Data, string);
	printf ("String: %s\r\n", string);
	
	Flash_Write_NUM(GetPageFromPageNum(2), number);
  RxVal = Flash_Read_NUM(GetPageFromPageNum(2));
	printf ("Read Num_1: %f\r\n", RxVal);

  Flash_Write_NUM(GetPageFromPageNum(3), val);
  RxVal = Flash_Read_NUM(GetPageFromPageNum(3));
	printf ("Read Num_2: %f\r\n", RxVal);
...
}

设置烧录地址区域, 避免其他区域被覆盖

20K = 0x5000 即0 ~ 20页这个区域用来存放程序

共赏

代码

不需要下载, 上面都提供了

参考

普中STM32-PZ6806L开发板(HAL库函数实现-USART1 printf+scanf/gets)

Note

FLASH_BASE 就是 0x08000000这个地址, 所以可以用 FLASH_BASE取代0x08000000