TTS.h

00001 /** 
00002  * Text To Speech synthesis library 
00003  * Copyright (c) 2008 Clive Webster.  All rights reserved.
00004  *
00005  * Nov. 29th 2009 - Modified to work with Arduino by Gabriel Petrut:
00006  * The Text To Speech library uses Timer1 to generate the PWM
00007  * output on digital pin 10. The output signal needs to be fed
00008  * to an RC filter then through an amplifier to the speaker.
00009  * http://www.tehnorama.ro/minieric-modulul-de-control-si-sinteza-vocala/
00010  * 
00011  * Modified to allow use of different PWM pins by Stephen Crane.
00012  */
00013 
00014 #ifndef TTS_h
00015 #define TTS_h
00016 
00017 #include "mbed.h"
00018 #include "english.h"
00019 
00020 #define byte uint8_t
00021 
00022 // DAC pins assume 8-bit DAC
00023 #ifdef TARGET_K64F
00024 #define DACpin DAC0_OUT
00025 #endif
00026 
00027 #ifdef TARGET_NUCLEO_F446RE
00028 #define DACpin A2
00029 #endif
00030 
00031 #ifdef TARGET_DISCO_F469NI
00032 #define DACpin A5
00033 
00034 #endif
00035 
00036 #ifdef TARGET_ARCH_MAX
00037 #define DACpin PA_4
00038 #define DACmax 4096
00039 #endif
00040 
00041 #ifdef TARGET_LPC1768
00042 #define DACpin p18
00043 #endif
00044 
00045 #ifdef TARGET_DISCO_L476VG
00046 #define DACpin PA_5
00047 #endif
00048 
00049 
00050 
00051 class TTS {
00052   public:
00053     /**
00054      * constructs a new text-to-speech
00055      * pin is the PWM pin on which audio is output
00056      * (valid values: 9, 10, 3)
00057      */
00058     TTS(void);
00059 
00060     /**
00061      * speaks a string of (english) text
00062      */
00063     void sayText(const char *text);
00064 
00065     /**
00066      * speaks a string of phonemes
00067      */
00068     void sayPhonemes(const char *phonemes);
00069 
00070     /**
00071      * sets the pitch; higher values: lower pitch
00072      */
00073     void setPitch(byte pitch);
00074 
00075     /**
00076      * gets the pitch
00077      */
00078     byte getPitch(void);
00079 };
00080 
00081 #endif