018 - STM32学习笔记 - SPI读写FLASH（三）- 写入字符串、小数与整数-编程知识

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

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IDif(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0x00SPI_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：

在这里插入图片描述

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FlashIDprintf("\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512printf("\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0x00for( 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256SPI_FLASH_BufferWrite((void*)intBuffer, SPI_FLASH_PageSize*2, sizeof(intBuffer));		    //写入地址为512printf("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){}
}