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// Nokia Presenter Bluetooth
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// Copyright (c) 2009 sford
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// Released under the MIT License: http://mbed.org/license/mit
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#include "NokiaPresenter.h"
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#include "mbed.h"
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NokiaPresenter::NokiaPresenter(PinName tx, PinName rx, PinName rst) : _bt(tx, rx), _rst(rst) {
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printf("Setup bt module\n");
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_bt.baud(9600);
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_rst = 0;
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wait(0.5);
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_rst = 1;
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wait(0.5);
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printf("Ensure we are in AT command mode...\n");
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_bt.printf("+++");
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wait(1);
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while (_bt.readable()) {
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_bt.getc(); // empty buffer
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}
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printf("Looking for BT Module...\n");
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at("AT\r", "\r\nOK\r\n");
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printf("Reset factory settings...\n");
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at("AT&F\r", "\r\nOK\r\n");
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printf("Setting name...\n");
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at("AT+BTLNM=\"simon\"\r", "\r\nOK\r\n");
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printf("Allow connections...\n");
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at("AT+BTAUT=1, 0\r", "\r\nOK\r\n");
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printf("Start BT server...\n");
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at("AT+BTSRV=1\r", "\r\nOK\r\n");
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printf("Waiting for presenter connection...\n");
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char buffer[23];
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for (int i=0; i<21; i++) {
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buffer[i] = _bt.getc();
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}
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printf("Got request, starting handshake...\n");
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for (int i=0; i<21; i++) {
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_bt.putc(buffer[i]);
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}
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for (int i=0; i<3; i++) {
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buffer[i] = _bt.getc();
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}
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const char connect[27] = {0x05,0x18,0x00,0x01,0x10,0x01,0x02,0x00,0xFF,0xFF,0x00,0x44,0x00,0x65,0x00,0x73,0x00,0x6B,0x00,0x74,0x00,0x6F,0x00,0x70,0x00,0x00,0x00};
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for (int i=0; i<27; i++) {
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_bt.putc(connect[i]);
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}
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printf("Handshake complete, waiting for desktop request...\n");
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for (int i=0; i<23; i++) {
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buffer[i] = _bt.getc();
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}
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for (int i=0; i<23; i++) {
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_bt.putc(buffer[i]);
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}
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printf("Presenter connection all setup!\n");
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}
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char NokiaPresenter::key() {
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char buffer[6];
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for (int i=0; i<6; i++) {
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buffer[i] = _bt.getc();
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}
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if (buffer[3] == 0x01) {
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return 0x00; // keyup
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}
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if (buffer[5] == 0xF8) {
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switch (buffer[4]) {
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case 0x07:
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return 'L';
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case 0x08:
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return 'R';
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case 0x09:
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return 'U';
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case 0x0A:
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return 'D';
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case 0x45:
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return 'C';
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}
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}
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return buffer[4];
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}
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void NokiaPresenter::at(char *command, char *response) {
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_bt.printf(command);
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for (int i=0; i<strlen(response); i++) {
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if (_bt.getc() != response[i]) {
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error("AT Command [%s] Failed", command);
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}
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}
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}
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demo demo