stm32f030c8 flash
时间: 2023-12-20 20:05:17 浏览: 148
STM32F030C8是一款基于ARM Cortex-M0内核的微控制器,它具有64KB的Flash存储器和8KB的SRAM。下面是关于STM32F030C8 Flash的介绍和演示:
STM32F030C8的Flash存储器是用于存储程序代码和数据的非易失性存储器。它可以被分成多个扇区,每个扇区的大小可以根据应用程序的需要进行配置。Flash存储器的读取速度非常快,但是写入速度比较慢,因此在进行Flash写入操作时需要注意一些问题。
下面是一个简单的演示,演示如何在STM32F030C8的Flash存储器中进行读写操作。假设我们要将一个整数值写入Flash存储器,并在需要时从Flash存储器中读取该值。以下是代码示例:
```c
#include "stm32f0xx.h"
#define FLASH_USER_START_ADDR ((uint32_t)0x08004000) // Flash存储器的起始地址
#define FLASH_USER_END_ADDR ((uint32_t)0x08008000) // Flash存储器的结束地址
#define FLASH_USER_SIZE (FLASH_USER_END_ADDR - FLASH_USER_START_ADDR) // Flash存储器的大小
uint32_t Flash_Write(uint32_t address, uint32_t data)
{
uint32_t status = FLASH_COMPLETE;
FLASH_Unlock(); // 解锁Flash存储器
if (address < FLASH_USER_START_ADDR || address > FLASH_USER_END_ADDR - 4)
{
status = FLASH_ERROR_PROGRAM;
}
else
{
// 擦除Flash存储器中的一个扇区
FLASH_ErasePage(address & ~(FLASH_PAGE_SIZE - 1));
// 写入数据到Flash存储器中
status = FLASH_ProgramWord(address, data);
}
FLASH_Lock(); // 锁定Flash存储器
return status;
}
uint32_t Flash_Read(uint32_t address)
{
return *(uint32_t*)address;
}
int main(void)
{
uint32_t data = 0x12345678;
uint32_t read_data = 0;
// 将数据写入Flash存储器中
Flash_Write(FLASH_USER_START_ADDR, data);
// 从Flash存储器中读取数据
read_data = Flash_Read(FLASH_USER_START_ADDR);
// 检查读取的数据是否正确
if (read_data == data)
{
// 数据正确
}
else
{
// 数据错误
}
while (1)
{
// 循环执行
}
}
```
在上面的代码中,Flash_Write()函数用于将一个32位的数据写入Flash存储器中,Flash_Read()函数用于从Flash存储器中读取一个32位的数据。在进行Flash写入操作时,需要先解锁Flash存储器,然后进行Flash擦除和Flash编程操作,最后再锁定Flash存储器。在进行Flash读取操作时,只需要直接从Flash存储器中读取数据即可。
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