ready to alpha

подготовка к альфа-тестированию

libraries/Wire/examples/i2c_master/i2c_master.ino

@@ -0,0 +1,92 @@
+// I2C master
+#include <Wire.h>
+
+// Slave address
+uint8_t SLAVE_ADDRESS = 0x33; 
+
+// Buffers for sending and receiving
+uint8_t masterTxData[3] = {0x30, 0x41, 0x51};
+uint8_t masterRxData[4] = {0};
+
+// Function for sending data via I2C bus
+uint8_t masterSendData(uint8_t* data, uint8_t dataLen)
+{
+  // Initiating work with the bus
+  Wire.beginTransmission(SLAVE_ADDRESS);
+  // Send data
+  Wire.write(data, dataLen);
+  // Finish working with the bus and return the result
+  return Wire.endTransmission();
+}
+
+// Function to receive a specified number of bytes from the I2C bus
+uint8_t masterGetData(uint8_t *buf, uint8_t dataSize)
+{
+  // Request data
+  Wire.requestFrom(SLAVE_ADDRESS, dataSize);
+  // If there are bytes available for reading, read them in a loop
+  uint8_t n = 0;
+  while (Wire.available()) 
+  {
+    // reading from the bus - from the slave device
+    buf[n] = Wire.read();
+    // Increasing the number of received bytes
+    n++;
+  }
+  // Return the number of received bytes 
+  return n;
+}
+
+
+// -------------------------------------------- //
+
+void setup() 
+{  
+  Serial.begin(115200);
+  while (!Serial);
+  Serial.println("I2C master start");  
+
+  // Initialize the device on the I2C bus as a master
+  Wire.begin(); 
+  Wire.setClock(400000);
+}
+
+void loop() 
+{
+  // Send data to slave
+  Serial.println("------------------------");
+  Serial.println("Master | Sending 3 bytes");
+  uint8_t result = masterSendData(masterTxData, sizeof(masterTxData));
+  // Show result
+  if (result == 0)
+    Serial.println("Master | Bytes sended");
+  else
+  {
+    Serial.print("Master | Send ERROR! Code: ");
+    Serial.println(result);
+  }
+  // Change the first byte for variety
+  masterTxData[0] += 1; 
+  // Delay before requesting data
+  delay(2000);
+  
+
+  // Request data from the slave
+  Serial.println("------------------------");
+  Serial.println("Master | Receiving 4 bytes");
+  uint8_t bytesQty = masterGetData(masterRxData, sizeof(masterRxData));
+  // Show result
+  if (bytesQty == 0)
+    Serial.println("Master | Receive ERROR!");
+  else
+  {
+    for (uint8_t i = 0; i < bytesQty; i++)
+    {
+      Serial.print("Master | Received byte: 0x");
+      Serial.println(masterRxData[i], HEX);
+    }
+  }
+  // Delay before sending data
+  delay(2000);
+}
+