esp32 arduino环境 udp serial收发实验

代码如下：

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();
    }
  }
}