esp32 arduino环境 udp serial收发实验
代码如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | #include <WiFi.h> #include <WiFiUdp.h> #include "WString.h" typedef void (*funcSlice)(); enum TaskType { TaskTypeLed, TaskTypeChipInfo, TaskTypeSerialRecv, TaskTypeUDPRecv, TaskTypeCount }; enum Status { LedStatusOff = HIGH, LedStatusOn = LOW }; struct GlobalParam { uint32_t chipId; uint32_t uruntimemsec; uint32_t uledPin; uint32_t uledValue; uint16_t uUdpPort; bool bLedBlink; bool wifiConnected; IPAddress udpPeerHost; uint16_t udpPeerPort; String strCache; }; struct ProgramBlock { uint32_t runLast; uint32_t runSlice; funcSlice func; }; ProgramBlock pb[TaskTypeCount] = {0}; GlobalParam param = {0}; //The udp library class WiFiUDP udp; void showUsage() { Serial.println( "============== menu ==============" ); Serial.println( "?: help menu" ); Serial.println( "s: status info" ); Serial.println( "==================================" ); } void showStatus() { Serial.println( "=============== status =============" ); Serial. printf ( "chip Id:%d\n" , param.chipId); Serial.print( "wifi connected:" ); Serial.println(param.wifiConnected); Serial.print( "local ip:" ); Serial.println(WiFi.localIP()); Serial. printf ( "has run time(misecs):%d\n" , param.uruntimemsec); Serial.print( "led blink:" ); Serial.println(param.bLedBlink); Serial. printf ( "udp listen port:%d\n" , param.uUdpPort); Serial.print( "udp peer host:" ); Serial.println(param.udpPeerHost.toString()); Serial. printf ( "udp peer port:%d\n" , param.udpPeerPort); Serial.println( "====================================" ); } void initUDP() { param.uUdpPort = 10888; udp.begin(param.uUdpPort); param.udpPeerHost.fromString( "192.168.7.225" ); param.udpPeerPort = 11888; } void sendUDP(String str) { udp.beginPacket(param.udpPeerHost,param.udpPeerPort); udp.println(str); udp.endPacket(); } void WiFiEvent(WiFiEvent_t event){ switch (event) { case SYSTEM_EVENT_STA_GOT_IP: //When connected set Serial.print( "WiFi connected! IP address: " ); Serial.println(WiFi.localIP()); //initializes the UDP state //This initializes the transfer buffer // udp.begin(WiFi.localIP(),udpPort); param.wifiConnected = true ; pb[TaskTypeLed].runSlice = 1000; param.bLedBlink = true ; initUDP(); break ; case SYSTEM_EVENT_STA_DISCONNECTED: Serial.println( "WiFi lost connection" ); param.wifiConnected = false ; pb[TaskTypeLed].runSlice = 3000; param.bLedBlink = false ; param.uledValue = LedStatusOff; break ; default : break ; } } void connectToWIFI() { WiFi.disconnect( true ); WiFi.onEvent(WiFiEvent); WiFi.begin( "wifi_ssid" , "wifi_password" ); } void taskChipInfo() { // Serial.printf("time[%d] run taskChipInfo\n", param.uruntimemsec); param.chipId = 0; for ( int i=0; i<17; i=i+8) { param.chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i; } // Serial.printf("ESP32 Chip model = %s Rev %d\n", ESP.getChipModel(), ESP.getChipRevision()); // Serial.printf("This chip has %d cores\n", ESP.getChipCores()); // Serial.print("Chip ID: "); // Serial.println(chipId); } void taskLed() { // Serial.printf("time[%d] run taskLed\n", param.uruntimemsec); if (param.bLedBlink) { if (LedStatusOff == param.uledValue){ param.uledValue = LedStatusOn; } else { param.uledValue = LedStatusOff; } } digitalWrite(param.uledPin, param.uledValue); } void parseData() { while (param.strCache.length()) { int index = param.strCache.indexOf( '\n' ); if (index < 0){ return ; } String strwhole = param.strCache.substring(0, index); param.strCache. remove (0, index+1); Serial. printf ( "whole len:%d " , strwhole.length()); Serial.println(strwhole); // Serial.printf("equal ret:%d\n", ret); if (strwhole.equals(String( '?' ))) { showUsage(); } else if (strwhole.equalsIgnoreCase(String( 's' ))) { showStatus(); } } } void taskSerialRecv() { while (Serial.available()) { char nch = Serial.read(); param.strCache += nch; } parseData(); } char buffUdpRecv[255] = {0}; void taskUDPRecv() { if (!param.wifiConnected){ return ; } // Serial.printf("time %d run taskUDPRecv\n", param.uruntimemsec); int len = udp.parsePacket(); if (len <= 0){ return ; } IPAddress phost = udp.remoteIP(); uint16_t pport = udp.remotePort(); param.udpPeerHost = phost; param.udpPeerPort = pport; udp.read(buffUdpRecv, len); buffUdpRecv[len] = '\n' ; buffUdpRecv[len+1] = 0; param.strCache += buffUdpRecv; parseData(); } void setup() { // put your setup code here, to run once: Serial.begin(115200); pb[TaskTypeChipInfo].runLast = 0; pb[TaskTypeChipInfo].runSlice = 2000; pb[TaskTypeChipInfo].func = taskChipInfo; pb[TaskTypeLed].runLast = 0; pb[TaskTypeLed].runSlice = 1000; pb[TaskTypeLed].func = taskLed; pb[TaskTypeSerialRecv].runLast = 0; pb[TaskTypeSerialRecv].runSlice = 40; pb[TaskTypeSerialRecv].func = taskSerialRecv; pb[TaskTypeUDPRecv].runLast = 0; pb[TaskTypeUDPRecv].runSlice = 40; pb[TaskTypeUDPRecv].func = taskUDPRecv; param.uledPin = GPIO_ID_PIN(22); param.uledValue = LedStatusOff; pinMode(param.uledPin, OUTPUT); taskLed(); connectToWIFI(); } void loop() { // put your main code here, to run repeatedly: param.uruntimemsec = millis(); for ( int t = 0; t < TaskTypeCount; t++) { if (param.uruntimemsec - pb[t].runLast > pb[t].runSlice) { pb[t].runLast = param.uruntimemsec; pb[t].func(); } } } |
程序运行效果截图:
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