018 - STM32学习笔记 - SPI访问Flash（三）- 写入字符串、小数与整数

上节对Flash的跨页写入数据进行了完善，但是数据写入都是以Byte数组的方式进行写入，这节分别进行字符串的写入和小数整数的写入，本节内容对SPI的函数不需要进行修改，在主函数的调用中会完善如何写入字符串、小数和整数。

1、字符串写入

u8 ReadBuffer[4096] = {0x00};
u8 WriteBuffer[] = "STM32学习笔记\r\nSPI读写Flash测试例程！";
int main(void)
{
    u32 TransferStatus = 0;
    u32 device_id = 0;
    LED_Config();
    DEBUG_USART1_Config();
    SPI_GPIO_Config();
    printf("\r\n这是SPI读取FLASH_Device_ID的测试实验！\r\n");
    SPI_Flash_WakeUp();							//掉电唤醒
    device_id = SPI_FLASH_ReadID();				 //获取设备ID
    if(device_id == sFLASH_ID)
    {
        printf("\r\n检测到SPI FLASH W25Q128 ！设备号为：0x%X \r\n",device_id);
        SPI_Flash_Erase(FLASH_SectorErass);						//扇区擦除，FLASH_SectorErass为宏定义，值为0x00
        SPI_FLASH_BufferWrite(WriteBuffer,FLASH_WriteAddress,sizeof(WriteBuffer));		//写入字符串
        printf("\r\n写入的数据为：\r\t%s\r\n",WriteBuffer);
        SPI_Flash_ReadDate(ReadBuffer,FLASH_ReadAddress,sizeof(WriteBuffer));			//读取写入的数据
        printf("\r\n读出的数据为：\r\t%s\r\n",ReadBuffer);
        TransferStatus = strcmp((char *)WriteBuffer,(char *)ReadBuffer);
        if(TransferStatus == 0)
        {
            LED_GREEN;
            printf("\r\n 16M串行Flash(W24Q128)测试成功！ \r\n");
        }
        else
        {
            LED_RED;
            printf("\r\n 16M串行Flash(W24Q128)测试失败！ \r\n");
        }
    }
    while(1)
    {
    }
}

测试效果：

2、小数、整数读写

int main(void)
{
	uint8_t cal_flag = 0;
    u32 device_id = 0;
    u32 i = 0;
    long double doubleBuffer[7] = {0};
    int intBuffer[7] = {0};
    DEBUG_USART1_Config();
    SPI_GPIO_Config();
    printf("\r\n这是SPI读取FLASH_Device_ID的测试实验！\r\n");
    SPI_Flash_WakeUp();									//掉电唤醒
    device_id = SPI_FLASH_ReadID();						 //获取FlashID
    printf("\r\ndevice_id = 0x%X\r\n",device_id);
	if(device_id == sFLASH_ID)
    {
        SPI_Flash_ReadDate(&cal_flag, SPI_FLASH_PageSize*0, 1);				//读取数据标志位
        if(cal_flag == 0xFE)
        {
            for(i = 0;i < 7;i++)									//先将浮点数数组和整数数组清空
            {
                doubleBuffer[i] = 0;
                intBuffer[i] = 0 ;
            }
            printf("\r\n检测到数据标志\r\n");
            SPI_Flash_ReadDate((void*)doubleBuffer, SPI_FLASH_PageSize*1, sizeof(doubleBuffer));     //读取小数数据，写入是首地址为256  
            SPI_Flash_ReadDate((void*)intBuffer, SPI_FLASH_PageSize*2, sizeof(intBuffer));           //读取整数数据，写入时首地址为512
            printf("\r\n从芯片读到数据：\r\n");			
            for( i=0; i<7; i++ )
            {
                printf("读取小数 = %LF \r\n",doubleBuffer[i]);
                printf("读取整数 = %d \r\n",intBuffer[i]);				
            }
            printf("\r\nFLASH存在数据，复位将清除小数写入实验\r\n");
            SPI_Flash_Erase(0);
        }
        else											//若未读取到数据标志位，则首先写入
        {
            printf("\r\n没有检测到数据标志，FLASH没有存储数据，即将进行小数写入实验\r\n");
            cal_flag =0xFE;
            SPI_Flash_Erase(0);            //写入前先擦除扇区
            SPI_FLASH_BufferWrite(&cal_flag, SPI_FLASH_PageSize*0, 1); 			//往第0页写入，即起始地址为0x00
            for( i=0; i<7; i++ )
            {
                doubleBuffer[i] = i +0.1;
                intBuffer[i]=i*100+1 ;
            }
            SPI_FLASH_BufferWrite((void*)doubleBuffer, SPI_FLASH_PageSize*1, sizeof(doubleBuffer));		//写入地址为256
            SPI_FLASH_BufferWrite((void*)intBuffer, SPI_FLASH_PageSize*2, sizeof(intBuffer));		    //写入地址为512
            printf("向芯片写入数据：");
            for( i=0; i<7; i++ )
            {
                printf("写入小数 = %LF\r\n",doubleBuffer[i]);
                printf("写入整数 = %d\r\n",intBuffer[i]);
            }
            printf("\r\n请复位开发板，以读取数据进行检验\r\n");
        }
    }
    SPI_Flash_PowerDown();
    while(1)
    {
    }
}

无数据，写入数据：

读取数据：