Weimen Li / HC06Bluetooth

Driver for the JY-MCU v1.06 HC-06 Bluetooth module.

Dependents:   DISCO-F746NG_rtos_test MbedTableControl

HC06Bluetooth.h@15:6a0aeaa39291, 2016-08-03 (annotated)

Committer:
Electrotiger
Date:
Wed Aug 03 18:18:05 2016 +0000
Revision:
15:6a0aeaa39291
Parent:
12:5ba022adbbfb
Child:
16:1030b80a28f4
Fixed bug where dataReceivedBufferPos was not 0-initialized, leading to spontaneous errors on memcpy.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Electrotiger 15:6a0aeaa39291 1 /*
Electrotiger 15:6a0aeaa39291 2 * HC06Bluetooth.cpp
Electrotiger 15:6a0aeaa39291 3 *
Electrotiger 15:6a0aeaa39291 4 * Created on: Jun 4, 2016
Electrotiger 15:6a0aeaa39291 5 * Author: Developer
Electrotiger 10:b0a0a82a9ff5 6 */
Electrotiger 10:b0a0a82a9ff5 7
Electrotiger 15:6a0aeaa39291 8 #include <HC06Bluetooth.h>
Electrotiger 15:6a0aeaa39291 9 #include <algorithm>
Electrotiger 10:b0a0a82a9ff5 10
Electrotiger 15:6a0aeaa39291 11 /* Static methods used to help configure the Baudrate. */
Electrotiger 15:6a0aeaa39291 12
Electrotiger 15:6a0aeaa39291 13 // WARNING: DO NOT CHANGE THESE VALUES, AS THEY ARE USED TO INDEX INTO AN ARRAY FOR IMPLEMENTATION.
Electrotiger 15:6a0aeaa39291 14 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"};
Electrotiger 15:6a0aeaa39291 15 const int32_t BaudATReplyLength[] = {6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 9};
Electrotiger 15:6a0aeaa39291 16 //const char* BaudATReplyPattern[] = {"OK1200", "OK2400", "OK4800","OK9600","OK19200","OK38400","OK57600","OK115200","OK230400","OK460800","OK921600","OK1382400"};
Electrotiger 15:6a0aeaa39291 17 const int32_t BaudValue[] = {1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600, 1382400};
Electrotiger 15:6a0aeaa39291 18
Electrotiger 15:6a0aeaa39291 19 /* HC06 Bluetooth Class Implementation: */
Electrotiger 15:6a0aeaa39291 20 HC06Bluetooth::HC06Bluetooth(PinName TX, PinName RX, Baudrate baudrate, void (*lineCallbackFunc) (const char* readString, size_t strlen), void (*charCallbackFunc) (char readChar))
Electrotiger 15:6a0aeaa39291 21 : btSerialObj(TX, RX), baudrate(baudrate), lineCallbackFunc(lineCallbackFunc), charCallbackFunc(charCallbackFunc), dataReceivedBufferPos(0) {
Electrotiger 15:6a0aeaa39291 22 btSerialObj.baud(BaudValue[baudrate]);
Electrotiger 15:6a0aeaa39291 23
Electrotiger 15:6a0aeaa39291 24 // Set the interrupt to be called when a byte is received.
Electrotiger 15:6a0aeaa39291 25 if ((lineCallbackFunc != NULL) || (charCallbackFunc != NULL)) {
Electrotiger 15:6a0aeaa39291 26 btSerialObj.attach(this, &HC06Bluetooth::receiveByteISR);
Electrotiger 15:6a0aeaa39291 27 }
Electrotiger 15:6a0aeaa39291 28 }
Electrotiger 10:b0a0a82a9ff5 29
Electrotiger 15:6a0aeaa39291 30 void HC06Bluetooth::runSetup(std::string deviceName, std::string PIN) {
Electrotiger 15:6a0aeaa39291 31 int numCharsReceived = 0;
Electrotiger 15:6a0aeaa39291 32 // Detatch the interrupt.
Electrotiger 15:6a0aeaa39291 33 btSerialObj.attach(NULL);
Electrotiger 15:6a0aeaa39291 34 /* Sweep through a list of Baud rates until we find the one that the device has previously been set to. */
Electrotiger 15:6a0aeaa39291 35 bool baudFound = false;
Electrotiger 15:6a0aeaa39291 36 Timer timeOut;
Electrotiger 15:6a0aeaa39291 37 timeOut.start();
Electrotiger 15:6a0aeaa39291 38 // For every baud rate in the list:
Electrotiger 15:6a0aeaa39291 39 for (volatile int i = 0; (i < END) && (!baudFound); i++) {
Electrotiger 15:6a0aeaa39291 40 // Set the communication baud rate to it.
Electrotiger 15:6a0aeaa39291 41 btSerialObj.baud(BaudValue[i]);
Electrotiger 15:6a0aeaa39291 42 // Send the test command "AT" to the device.
Electrotiger 15:6a0aeaa39291 43 btSerialObj.puts("AT");
Electrotiger 15:6a0aeaa39291 44 // While the time out has not been reached:
Electrotiger 15:6a0aeaa39291 45 for(timeOut.reset(); timeOut.read_ms() < 1000; ) {
Electrotiger 15:6a0aeaa39291 46 // If the serial object is readable, make sure the read character matches the reply string "OK".
Electrotiger 15:6a0aeaa39291 47 if (btSerialObj.readable() && !baudFound) {
Electrotiger 15:6a0aeaa39291 48 baudFound = true;
Electrotiger 15:6a0aeaa39291 49 break;
Electrotiger 15:6a0aeaa39291 50 }
Electrotiger 15:6a0aeaa39291 51 }
Electrotiger 15:6a0aeaa39291 52 }
Electrotiger 15:6a0aeaa39291 53 // Flush whatever's in the input buffer.
Electrotiger 15:6a0aeaa39291 54 while(btSerialObj.readable()) {
Electrotiger 15:6a0aeaa39291 55 btSerialObj.getc();
Electrotiger 15:6a0aeaa39291 56 }
Electrotiger 15:6a0aeaa39291 57 //Overwrite the Baud rate to 115200.
Electrotiger 15:6a0aeaa39291 58 btSerialObj.puts(BaudATString[baudrate]);
Electrotiger 15:6a0aeaa39291 59 btSerialObj.baud(BaudValue[baudrate]);
Electrotiger 15:6a0aeaa39291 60 // Wait for the 8 character reply "OK115200"
Electrotiger 15:6a0aeaa39291 61 for(numCharsReceived = 0 ; numCharsReceived < BaudATReplyLength[baudrate]; numCharsReceived++) {
Electrotiger 15:6a0aeaa39291 62 //while(!btSerialObj.readable());
Electrotiger 15:6a0aeaa39291 63 //btSerialObj.getc();
Electrotiger 15:6a0aeaa39291 64 }
Electrotiger 15:6a0aeaa39291 65 wait_ms(1000);
Electrotiger 15:6a0aeaa39291 66
Electrotiger 15:6a0aeaa39291 67 // Set the name of the device.
Electrotiger 15:6a0aeaa39291 68 btSerialObj.puts(("AT+NAME" + deviceName.substr(0,20)).c_str());
Electrotiger 15:6a0aeaa39291 69 // Wait for the 6 character reply "OKname"
Electrotiger 15:6a0aeaa39291 70 for(numCharsReceived = 0 ; numCharsReceived < 6; numCharsReceived++) {
Electrotiger 15:6a0aeaa39291 71 //while(!btSerialObj.readable());
Electrotiger 15:6a0aeaa39291 72 //btSerialObj.getc();
Electrotiger 15:6a0aeaa39291 73 }
Electrotiger 15:6a0aeaa39291 74 wait_ms(1000);
Electrotiger 10:b0a0a82a9ff5 75
Electrotiger 15:6a0aeaa39291 76 //Set the password of the device.
Electrotiger 15:6a0aeaa39291 77 btSerialObj.puts(("AT+PIN" + PIN.substr(0, 4)).c_str());
Electrotiger 15:6a0aeaa39291 78 // Wait for the 8 character reply "OKsetpin"
Electrotiger 15:6a0aeaa39291 79 for(numCharsReceived = 0 ; numCharsReceived < 8; numCharsReceived++) {
Electrotiger 15:6a0aeaa39291 80 //while(!btSerialObj.readable());
Electrotiger 15:6a0aeaa39291 81 //btSerialObj.getc();
Electrotiger 15:6a0aeaa39291 82 }
Electrotiger 15:6a0aeaa39291 83 wait_ms(1000);
Electrotiger 15:6a0aeaa39291 84 // Reattach the interrupt.
Electrotiger 15:6a0aeaa39291 85 btSerialObj.attach(this, &HC06Bluetooth::receiveByteISR);
Electrotiger 15:6a0aeaa39291 86 }
Electrotiger 15:6a0aeaa39291 87
Electrotiger 15:6a0aeaa39291 88 HC06Bluetooth::~HC06Bluetooth() {
Electrotiger 15:6a0aeaa39291 89 // TODO Auto-generated destructor stub
Electrotiger 15:6a0aeaa39291 90 }
Electrotiger 15:6a0aeaa39291 91
Electrotiger 15:6a0aeaa39291 92 void HC06Bluetooth::print(const char* buffer) {
Electrotiger 15:6a0aeaa39291 93 // TODO: Code hangs if buffer is too long! Not sure why.
Electrotiger 15:6a0aeaa39291 94 btSerialObj.puts(buffer);
Electrotiger 15:6a0aeaa39291 95 }
Electrotiger 15:6a0aeaa39291 96
Electrotiger 15:6a0aeaa39291 97 void HC06Bluetooth::println(const char* buffer) {
Electrotiger 15:6a0aeaa39291 98 btSerialObj.puts(buffer);
Electrotiger 15:6a0aeaa39291 99 btSerialObj.putc('\n');
Electrotiger 15:6a0aeaa39291 100 }
Electrotiger 15:6a0aeaa39291 101
Electrotiger 15:6a0aeaa39291 102 void HC06Bluetooth::print(char c) {
Electrotiger 15:6a0aeaa39291 103 btSerialObj.putc(c);
Electrotiger 15:6a0aeaa39291 104 }
Electrotiger 10:b0a0a82a9ff5 105
Electrotiger 15:6a0aeaa39291 106 void HC06Bluetooth::receiveByteISR() {
Electrotiger 15:6a0aeaa39291 107 while(btSerialObj.readable()) {
Electrotiger 15:6a0aeaa39291 108 // Get the character from the input.
Electrotiger 15:6a0aeaa39291 109 char receivedChar = btSerialObj.getc();
Electrotiger 15:6a0aeaa39291 110
Electrotiger 15:6a0aeaa39291 111 // Call the character callback function if it is not null.
Electrotiger 15:6a0aeaa39291 112 if (charCallbackFunc != NULL) {
Electrotiger 15:6a0aeaa39291 113 charCallbackFunc(receivedChar);
Electrotiger 15:6a0aeaa39291 114 }
Electrotiger 10:b0a0a82a9ff5 115
Electrotiger 15:6a0aeaa39291 116 if (lineCallbackFunc != NULL) {
Electrotiger 15:6a0aeaa39291 117 // If the character is a newline or carriage return, then call the line callback function.
Electrotiger 15:6a0aeaa39291 118 if ((receivedChar == '\n') || (receivedChar == '\r')) {
Electrotiger 15:6a0aeaa39291 119 // Terminate the buffer with a null character, since that is what strings end with.
Electrotiger 15:6a0aeaa39291 120 receivedChar = '\0';
Electrotiger 15:6a0aeaa39291 121 dataReceivedBuffer[dataReceivedBufferPos] = receivedChar;
Electrotiger 15:6a0aeaa39291 122 dataReceivedBufferPos++;
Electrotiger 15:6a0aeaa39291 123 // Copy data from the buffer to a copy.
Electrotiger 15:6a0aeaa39291 124 std::copy(dataReceivedBuffer, dataReceivedBuffer + dataReceivedBufferPos, dataReceivedBufferCopy);
Electrotiger 15:6a0aeaa39291 125 // Call the callback function.
Electrotiger 15:6a0aeaa39291 126 if (lineCallbackFunc != NULL) {
Electrotiger 15:6a0aeaa39291 127 lineCallbackFunc((const char*)dataReceivedBuffer, dataReceivedBufferPos);
Electrotiger 15:6a0aeaa39291 128 }
Electrotiger 15:6a0aeaa39291 129 // Reset the buffer position.
Electrotiger 15:6a0aeaa39291 130 dataReceivedBufferPos = 0;
Electrotiger 15:6a0aeaa39291 131 }
Electrotiger 15:6a0aeaa39291 132 // Otherwise, just place it in the buffer and move on.
Electrotiger 15:6a0aeaa39291 133 else {
Electrotiger 15:6a0aeaa39291 134 if (dataReceivedBufferPos < dataBufferSize) {
Electrotiger 15:6a0aeaa39291 135 dataReceivedBuffer[dataReceivedBufferPos] = receivedChar;
Electrotiger 15:6a0aeaa39291 136 dataReceivedBufferPos++;
Electrotiger 15:6a0aeaa39291 137 }
Electrotiger 15:6a0aeaa39291 138 }
Electrotiger 15:6a0aeaa39291 139 }
Electrotiger 15:6a0aeaa39291 140 }
Electrotiger 15:6a0aeaa39291 141 }
Electrotiger 15:6a0aeaa39291 142