基于FPGA的ESP8266无线数据传输（温湿度DTH11、光照强度BH1750、WIFI模块）连接中国移动onenet云平台，仿真+上板

一、创建云平台产品设备

使用串口助手测试传输过程

相关信息记录

二、FPGA仿真WIFI模块通信过程

仿真分析

 //各个状态tx_dataalways @(posedge clk or negedge rst_n) beginif(!rst_n) beginuart_tx_data <= 8'd0;endelse if((state==AT) && tx_count<8'd6 ) beginuart_tx_data <= cmd_AT[47 - tx_count *8 -:8];endelse if((state==CWMODE) && tx_count<8'd15 ) beginuart_tx_data <= cmd_CWMODE[119 - tx_count *8 -:8];endelse if((state==RST) && tx_count<8'd10 ) beginuart_tx_data <= cmd_RST[79 - tx_count *8 -:8];endelse if((state==CWJAP) && tx_count<8'd31 ) beginuart_tx_data <= cmd_CWJAP[247 - tx_count *8 -:8];endelse if((state==CWDHCP) && tx_count<8'd17 ) beginuart_tx_data <= cmd_CWDHCP[135 - tx_count *8 -:8];endelse if((state==MQTTUSERCFG) && tx_count<8'd172 ) beginuart_tx_data <= cmd_MQTTUSERCFG[1375 - tx_count *8 -:8];endelse if((state==MQTTCONN) && tx_count<8'd45 ) beginuart_tx_data <= cmd_MQTTCONN[359 - tx_count *8 -:8];endelse if((state==MQTTSUB) && tx_count<8'd67 ) beginuart_tx_data <= cmd_MQTTSUB[535 - tx_count *8 -:8];endelse if((state==MQTTPUB) && tx_count<8'd123 ) beginuart_tx_data <= cmd_MQTTPUB[983 - tx_count *8 -:8];endelse beginuart_tx_data <= uart_tx_data;end
end

always @(posedge clk or negedge rst_n) beginif(!rst_n) beginstate <= IDLE;endelse begincase(state)IDLE:beginstate<=AT;endAT:begin//at testif(tx_count==8'd6)beginstate <= WAK_AT;endelse beginstate <= AT;endendWAK_AT:beginif(rx_count==8'd2)beginstate <= CWMODE;endelse beginstate <= WAK_AT;endendCWMODE:begin//set modeif(tx_count==8'd15)beginstate <= WAK_CWMODE;endelse beginstate <= CWMODE;endendWAK_CWMODE:beginif(rx_count==8'd2)beginstate <= RST;endelse beginstate <= WAK_CWMODE;endendRST:begin//at rstif(tx_count==8'd10)beginstate <= WAK_RST;endelse beginstate <= RST;endendWAK_RST:beginif(rx_count==8'd2)beginstate <= CWJAP;endelse beginstate <= WAK_RST;endendCWJAP:begin//at rstif(tx_count==8'd31)beginstate <= WAK_CWJAP;endelse beginstate <= CWJAP;endendWAK_CWJAP:begin//at rstif(rx_count==8'd2)beginstate <= CWDHCP;endelse beginstate <= WAK_CWJAP;endendCWDHCP:begin//at rstif(tx_count==8'd17)beginstate <= WAK_CWDHCP;endelse beginstate <= CWDHCP;endendWAK_CWDHCP:begin//at rstif(rx_count==8'd2)beginstate <= MQTTUSERCFG;endelse beginstate <= WAK_CWDHCP;endendMQTTUSERCFG:begin//at rstif(tx_count==8'd172)beginstate <= WAK_MQTTUSERCFG;endelse beginstate <= MQTTUSERCFG;endendWAK_MQTTUSERCFG:begin//at rstif(rx_count==8'd2)beginstate <= MQTTCONN;endelse beginstate <= WAK_MQTTUSERCFG;endendMQTTCONN:begin//at rstif(tx_count==8'd45)beginstate <= WAK_MQTTCONN;endelse beginstate <= MQTTCONN;endendWAK_MQTTCONN:begin//at rstif(rx_count==8'd2)beginstate <= MQTTSUB;endelse beginstate <= WAK_MQTTCONN;endendMQTTSUB:begin//at rstif(tx_count==8'd67)beginstate <= WAK_MQTTSUB;endelse beginstate <= MQTTSUB;endendWAK_MQTTSUB:begin//at rstif(rx_count==8'd2)beginstate <= MQTTPUB;endelse beginstate <= WAK_MQTTSUB;endendMQTTPUB:begin//at rstif(tx_count==8'd123)beginstate <= WAK_MQTTPUB;endelse beginstate <= MQTTPUB;endendWAK_MQTTPUB:begin//at rstif(rx_count==8'd2)beginstate <= IDLE;endelse beginstate <= WAK_MQTTPUB;endenddefault:state <= IDLE;endcaseendend

接收数据判断只是简单做了一下，因为是正确回应的话所有的指令最后都是OK。所以可以一直缓存16位数据，当持续时间大于串口接受结束标志之间的间隔后进行判断，如果最后接收到的缓存16位数据是“OK”，则进入下一个状态即可，仿真只是检验一下过程，没做这一块。

按照第一部分设置的AT指令进行发送，主要就是一个状态机，一个是数据缓存发送。

2.上板

买的模块还没到，等到了再加上这部分内容。

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总结

持续更新…