利用提供的网页抓取例程，希望实现从web服务器不定时下载的功能，大体思路是先将wifi模块设置为STA模式，单连接，透传模式。然后与外部服务器建立TCP连接。紧接着发送http请求。第一次下载很顺利，但调用我写的ESP_To_Web()函数就没反应了，希望得到指导，不知道具体哪里配置错了，谢谢（下面只贴了部分代码）
void ESP8266_fresh ( void )
{
char cStrInput [100] = { 0 }, * pStrDelimiter [2], * pBuf, * pStr;
u8 uc = 0;
ESP8266_Choose ( ENABLE );
ESP8266_AT_Test ();
ESP8266_Net_Mode_Choose ( STA );
ESP8266_Cmd ( "AT+CWLAP", "OK", 0, 5000 );
do
{
PC_Usart ( "\r\n请输入能连接到Internet的WiFi名称和密钥，输入格式为：名称字符+英文逗号+密钥字符+空格，点击发送\r\n" );
scanf ( "%s", cStrInput );
PC_Usart ( "\r\n稍等片刻 ……\r\n" );
pBuf = cStrInput;
uc = 0;
while ( ( pStr = strtok ( pBuf, "," ) ) != NULL )
{
pStrDelimiter [ uc ++ ] = pStr;
pBuf = NULL;
}
} while ( ! ESP8266_JoinAP ( pStrDelimiter [0], pStrDelimiter [1] ) );
while ( ! ESP8266_Link_Server ( enumTCP, "eat.weixincore.com", "80", Single_ID ) );
ESP8266_UnvarnishSend (); //设为透传
ESP8266_SendString ( ENABLE, "GET /index.php?s=/Mobile/PrinterTest/index HTTP/1.1\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "Host: eat.weixincore.com\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "User-Agent: abc\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "Connection: close\r\n", NULL, Single_ID );//Keep-Alive
ESP8266_SendString ( ENABLE, "\r\n", NULL, Single_ID );
USART_DMACmd(USART2, USART_DMAReq_Rx, ENABLE);
DMA_Cmd(DMA1_Channel6,ENABLE); /*使能DMA*/
while(1)
{
if(DMA_GetFlagStatus(DMA1_FLAG_TC6)!=RESET) //判断通道6传输完成
{
DMA_ClearFlag(DMA1_FLAG_TC6);//清除通道6传输完成标志
break;
}
}
while( ! ESP8266_UnLink_Server ());
}
void Web_To_ESP(void)
{
while ( ! ESP8266_Link_Server ( enumTCP, "eat.weixincore.com", "80", Single_ID ) );
// ESP8266_UnvarnishSend ();
ESP8266_SendString ( ENABLE, "GET /index.php?s=/Mobile/PrinterTest/index HTTP/1.1\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "Host: eat.weixincore.com\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "User-Agent: abc\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "Connection: close\r\n", NULL, Single_ID );
ESP8266_SendString ( ENABLE, "\r\n", NULL, Single_ID );
USART_DMACmd(USART2, USART_DMAReq_Rx, ENABLE);
DMA_Cmd(DMA1_Channel6,ENABLE); /*使能DMA*/
while(1)
{
if(DMA_GetFlagStatus(DMA1_FLAG_TC6)!=RESET) //判断通道6传输完成
{
DMA_ClearFlag(DMA1_FLAG_TC6);//清除通道6传输完成标志
break;
}
}
while( ! ESP8266_UnLink_Server ()); |
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