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        在上一个实验中调试了SPI FLASH的读写。也是为了这个实验准备，那就是将汉字字库写入到FLASH中。我所用的汉子字库是2M左右的，板子上没有SD卡卡座，想了想就决定用1K Xmodem协议来传输文件。

        字库文件：16_24_32HZK.rar

        关于1K Xmodem协议简单的介绍一下，将文件数据分为多个包来传输，其中每个包都有1K的数据。当然加上包头以及后面的校验字节，每个数据包有1028个字节。GD32的存储容量够所以直接选用了1K Xmodem而没有选用128 Xmodem协议。

       1K Xmodem协议传输与128 Xmodem协议传输相比较所需要的时间短，如果所用控制器的内存容量小那么可以考虑使用128 Xmodem协议。有兴趣了解的童鞋可以在网上查查更加详细的介绍。

       下面是主要的接收代码：

	if(gFontFlag != X_REC_END)
	{
			while(XmodemInfoStruct.Xmodem_Status != X_REC_END )	
			{					
					if(XmodemInfoStruct.Xmodem_Status == X_REC_INVALID)
					{
							 USART_SendData (USART1,XMODEM_NAK);     //¿ªÊ¼
							 XmodemInfoStruct.Xmodem_Status = X_REC_READY;
					}
					
					if(XmodemInfoStruct.Xmodem_Time >= XMODE_TIMEOUT)
					{
							 USART_SendData (USART1,XMODEM_NAK);     //¿ªÊ¼
							 XmodemInfoStruct.Xmodem_Status = X_REC_READY;
							 XmodemInfoStruct.Xmodem_Time = 0;
					}
					
					if(XmodemInfoStruct.Xmodem_Status == X_REC_RECOK)
					{
								if((XmodemInfoStruct.Xmodem_Count & 0x00ff) != gUart1RecBuff[1])
								{
										if((XmodemInfoStruct.Xmodem_Count & 0x00ff) > gUart1RecBuff[1])
										{
												 XmodemInfoStruct.Xmodem_Count += 0x100;
										}
										XmodemInfoStruct.Xmodem_Count &= 0xff00;
										XmodemInfoStruct.Xmodem_Count |= gUart1RecBuff[1];
										GUI_DispDecAt(XmodemInfoStruct.Xmodem_Count,100,100,5); 
										SPI_Flash_Write(&gUart1RecBuff[3],gFontFlashAddr,1024);
										gFontFlashAddr += 1024;	
										USART_SendData (USART1,XMODEM_ACK);
										XmodemInfoStruct.Xmodem_Status = X_REC_READY;		
								}						
					}
			}
			if(XmodemInfoStruct.Xmodem_Status == X_REC_END )
			{
					USART_SendData (USART1,XMODEM_ACK);
					gFontFlag = X_REC_END;
				  DelayMs(500);
					SPI_Flash_Write(&gFontFlag,FONT_FLASH_FLAG,1);
			}
	}

在液晶上显示接收的数据包个数：

总共接收2002个数据包，一共2002K的字库数据。主函数里的程序：

int main()
{
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	LedPinInit();
	SysTickInit();
	UartInit();
	FlashInit();
	
	SPI_Flash_Read(&gFontFlag,FONT_FLASH_FLAG,1);	
	TimerInit(99,7199);
	AdcInit();
	GUI_Init();
	GUI_SetBkColor(GUI_RED);
	GUI_SetColor(GUI_WHITE);
	GUI_Clear();
	GUI_DispStringAt("liklon--->GD32107C-EVAL",1,40);
	GUI_DispStringAt("www.eepw.com.cn",40,60);
	GUI_DispStringAt("Xmodem pack number:",10,80);
	GUI_DispStringAt("电子产品世界",48,160);
//	TouchInit();
	GUI_SetPenSize(10);
	GUI_DispStringAt((const char *)gReadWriteBuff,38,200);
	USART_SendData(USART1,'a');
	DelayMs(500);
	if(gFontFlag != X_REC_END)
	{
			while(XmodemInfoStruct.Xmodem_Status != X_REC_END )	
			{					
					if(XmodemInfoStruct.Xmodem_Status == X_REC_INVALID)
					{
							 USART_SendData (USART1,XMODEM_NAK);     //¿ªÊ¼
							 XmodemInfoStruct.Xmodem_Status = X_REC_READY;
					}
					
					if(XmodemInfoStruct.Xmodem_Time >= XMODE_TIMEOUT)
					{
							 USART_SendData (USART1,XMODEM_NAK);     //¿ªÊ¼
							 XmodemInfoStruct.Xmodem_Status = X_REC_READY;
							 XmodemInfoStruct.Xmodem_Time = 0;
					}
					
					if(XmodemInfoStruct.Xmodem_Status == X_REC_RECOK)
					{
								if((XmodemInfoStruct.Xmodem_Count & 0x00ff) != gUart1RecBuff[1])
								{
										if((XmodemInfoStruct.Xmodem_Count & 0x00ff) > gUart1RecBuff[1])
										{
												 XmodemInfoStruct.Xmodem_Count += 0x100;
										}
										XmodemInfoStruct.Xmodem_Count &= 0xff00;
										XmodemInfoStruct.Xmodem_Count |= gUart1RecBuff[1];
										GUI_DispDecAt(XmodemInfoStruct.Xmodem_Count,100,100,5); 
										SPI_Flash_Write(&gUart1RecBuff[3],gFontFlashAddr,1024);
										gFontFlashAddr += 1024;	
										USART_SendData (USART1,XMODEM_ACK);
										XmodemInfoStruct.Xmodem_Status = X_REC_READY;		
								}						
					}
			}
			if(XmodemInfoStruct.Xmodem_Status == X_REC_END )
			{
					USART_SendData (USART1,XMODEM_ACK);
					gFontFlag = X_REC_END;
				  DelayMs(500);
					SPI_Flash_Write(&gFontFlag,FONT_FLASH_FLAG,1);
			}
	}

对代码有兴趣的童鞋去楼主的导航帖处下载