Diff: HC06Bluetooth.cpp

Revision:

0:9afc272fa65f

Child:

5:e00cc0dab1c7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HC06Bluetooth.cpp	Fri Jun 24 21:03:20 2016 +0000
@@ -0,0 +1,129 @@
+/*
+ * HC06Bluetooth.cpp
+ *
+ *  Created on: Jun 4, 2016
+ *      Author: Developer
+ */
+
+#include <HC06Bluetooth.hpp>
+#include <algorithm>
+
+/* Static methods used to help configure the Baudrate. */
+
+// WARNING: DO NOT CHANGE THESE VALUES, AS THEY ARE USED TO INDEX INTO AN ARRAY FOR IMPLEMENTATION.
+enum Baudrate {B1200, B2400, B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600, B1382400, END};
+const char* BaudATString[] = {"AT+BAUD1", "AT+BAUD2", "AT+BAUD3", "AT+BAUD4", "AT+BAUD5", "AT+BAUD6", "AT+BAUD7", "AT+BAUD8", "AT+BAUD9", "AT+BAUDA", "AT+BAUDB", "AT+BAUDC"};
+const int32_t BaudATReplyLength[] = {6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9};
+//const char* BaudATReplyPattern[] = {"OK1200", "OK2400", "OK4800","OK9600","OK19200","OK38400","OK57600","OK115200","OK230400","OK460800","OK921600","OK1382400"};
+const int32_t BaudValue[] = {1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 1382400};
+
+/* HC06 Bluetooth Class Implementation: */
+HC06Bluetooth::HC06Bluetooth(PinName TX, PinName RX, void (*lineCallbackFunc) (const char* readString), void (*charCallbackFunc) (char readChar))
+: btSerialObj(TX, RX), lineCallbackFunc(lineCallbackFunc), charCallbackFunc(charCallbackFunc) {
+    btSerialObj.baud(115200);
+
+    // Set the interrupt to be called when a byte is received.
+    if ((lineCallbackFunc != NULL) || (charCallbackFunc != NULL)) {
+        btSerialObj.attach(this, &HC06Bluetooth::receiveByteISR);
+    }
+}
+
+void HC06Bluetooth::runSetup(std::string deviceName, std::string PIN) {
+    int numCharsReceived = 0;
+    // Detatch the interrupt.
+    btSerialObj.attach(NULL);
+    /* Sweep through a list of Baud rates until we find the one that the device has previously been set to. */
+    bool baudFound = false;
+    Timer timeOut;
+    timeOut.start();
+    // For every baud rate in the list:
+    for (int i = 0; (i < END) && (!baudFound); i++) {
+        // Set the communication baud rate to it.
+        btSerialObj.baud(BaudValue[i]);
+        // Send the test command "AT" to the device.
+        btSerialObj.puts("AT");
+        // While the time out has not been reached:
+        for(timeOut.reset(); timeOut.read_ms() < 1000; ) {
+            // If the serial object is readable, make sure the read character matches the reply string "OK".
+            if (btSerialObj.readable() && !baudFound) {
+                    baudFound = true;
+                    break;
+            }
+        }
+    }
+    // Flush whatever's in the input buffer.
+    while(btSerialObj.readable()) {
+        btSerialObj.getc();
+    }
+    //Overwrite the Baud rate to 115200.
+    btSerialObj.puts(BaudATString[B115200]);
+    btSerialObj.baud(BaudValue[B115200]);
+    // Wait for the 8 character reply "OK115200"
+    for(numCharsReceived = 0 ; numCharsReceived < BaudATReplyLength[B115200]; numCharsReceived++) {
+        //while(!btSerialObj.readable());
+        btSerialObj.getc();
+    }
+
+    // Set the name of the device.
+    btSerialObj.puts(("AT+NAME" + deviceName.substr(0,20)).c_str());
+    // Wait for the 6 character reply "OKname"
+    for(numCharsReceived = 0 ; numCharsReceived < 6; numCharsReceived++) {
+        while(!btSerialObj.readable());
+        btSerialObj.getc();
+    }
+
+    //Set the password of the device.
+    btSerialObj.puts(("AT+PIN" + PIN.substr(0, 4)).c_str());
+    // Wait for the 8 character reply "OKsetpin"
+    for(numCharsReceived = 0 ; numCharsReceived < 8; numCharsReceived++) {
+        while(!btSerialObj.readable());
+        btSerialObj.getc();
+    }
+    // Reattach the interrupt.
+    btSerialObj.attach(this, &HC06Bluetooth::receiveByteISR);
+}
+
+HC06Bluetooth::~HC06Bluetooth() {
+    // TODO Auto-generated destructor stub
+}
+
+void HC06Bluetooth::print(const char* buffer) {
+    btSerialObj.puts(buffer);
+}
+
+void HC06Bluetooth::print(char c) {
+    btSerialObj.putc(c);
+}
+
+void HC06Bluetooth::receiveByteISR() {
+    while(btSerialObj.readable()) {
+        // Get the character from the input.
+        char receivedChar = btSerialObj.getc();
+
+        // Call the character callback function if it is not null.
+        if (charCallbackFunc != NULL) {
+            charCallbackFunc(receivedChar);
+        }
+
+        // If the character is a newline or carriage return, then call the line callback function.
+        if ((receivedChar == '\n') || (receivedChar == '\r')) {
+            // Terminate the buffer with a null character, since that is what strings end with.
+            receivedChar = '\0';
+            dataReceivedBuffer[dataReceivedBufferPos] = receivedChar;
+            // Copy data from the buffer to a copy.
+            std::copy(dataReceivedBuffer, dataReceivedBuffer + dataReceivedBufferPos, dataReceivedBufferCopy);
+            // Reset the buffer position.
+            dataReceivedBufferPos = 0;
+            // Call the callback function.
+            if (lineCallbackFunc != NULL) {
+                lineCallbackFunc((const char*)dataReceivedBuffer);
+            }
+        }
+        // Otherwise, just place it in the buffer and move on.
+        else {
+            dataReceivedBuffer[dataReceivedBufferPos] = receivedChar;
+            dataReceivedBufferPos++;
+        }
+    }
+}
+