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Avital
5 years ago
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// Talkie library
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// Copyright 2011 Peter Knight
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// Adafruit library modified by Jean-Luc Deladrière
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// This code is released under GPLv2 license.
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// Though the Wave Shield DAC pins are configurable, much else in this code
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// is still very Uno-specific; the timers and timer control registers, the
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// PWM output pin, etc. Compatibility with other boards is not guaranteed.
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#include "talkie.h"
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#define PIEZO // If set, connect piezo on pins 3 & 11, is louder
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//#define FS 8000 // Speech engine sample rate
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#define FS map(analogRead(1),0,1023,4000,16000)
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//#define TICKS (FS / 40) // Speech data rate
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#define TICKS 20 // Speech data rate
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//#define TICKS map(analogRead(0),0,700,20,800)
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// Some of these variables could go in the Talkie object, but the hardware
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// specificity (reliance on certain timers and/or PWM pins) kills any point
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// in multiple instances; there can be only one. So they're declared as
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// static here to keep the header simple and self-documenting.
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//#if TICKS < 255
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//static volatile uint8_t interruptCount;
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//#else
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static volatile uint16_t interruptCount;
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static volatile uint16_t slower;
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//#endif
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static volatile uint8_t *csPort, *clkPort, *datPort;
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static volatile uint16_t synthEnergy;
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static volatile int16_t synthK1, synthK2;
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static volatile int8_t synthK3, synthK4, synthK5, synthK6,
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synthK7, synthK8, synthK9, synthK10;
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static uint16_t buf, synthRand = 1;
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static int16_t x0, x1, x2, x3, x4, x5, x6, x7, x8, x9;
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static uint8_t periodCounter, nextPwm = 0x80,
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synthPeriod, bufBits,
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csBitMask, clkBitMask, datBitMask;
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static const uint8_t *ptrAddr;
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static const int16_t PROGMEM
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tmsK1[] = {0x82C0,0x8380,0x83C0,0x8440,0x84C0,0x8540,0x8600,0x8780,
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0x8880,0x8980,0x8AC0,0x8C00,0x8D40,0x8F00,0x90C0,0x92C0,
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0x9900,0xA140,0xAB80,0xB840,0xC740,0xD8C0,0xEBC0,0x0000,
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0x1440,0x2740,0x38C0,0x47C0,0x5480,0x5EC0,0x6700,0x6D40},
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tmsK2[] = {0xAE00,0xB480,0xBB80,0xC340,0xCB80,0xD440,0xDDC0,0xE780,
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0xF180,0xFBC0,0x0600,0x1040,0x1A40,0x2400,0x2D40,0x3600,
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0x3E40,0x45C0,0x4CC0,0x5300,0x5880,0x5DC0,0x6240,0x6640,
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0x69C0,0x6CC0,0x6F80,0x71C0,0x73C0,0x7580,0x7700,0x7E80};
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static const int8_t PROGMEM
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tmsK3[] = {0x92,0x9F,0xAD,0xBA,0xC8,0xD5,0xE3,0xF0,
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0xFE,0x0B,0x19,0x26,0x34,0x41,0x4F,0x5C},
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tmsK4[] = {0xAE,0xBC,0xCA,0xD8,0xE6,0xF4,0x01,0x0F,
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0x1D,0x2B,0x39,0x47,0x55,0x63,0x71,0x7E},
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tmsK5[] = {0xAE,0xBA,0xC5,0xD1,0xDD,0xE8,0xF4,0xFF,
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0x0B,0x17,0x22,0x2E,0x39,0x45,0x51,0x5C},
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tmsK6[] = {0xC0,0xCB,0xD6,0xE1,0xEC,0xF7,0x03,0x0E,
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0x19,0x24,0x2F,0x3A,0x45,0x50,0x5B,0x66},
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tmsK7[] = {0xB3,0xBF,0xCB,0xD7,0xE3,0xEF,0xFB,0x07,
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0x13,0x1F,0x2B,0x37,0x43,0x4F,0x5A,0x66},
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tmsK8[] = {0xC0,0xD8,0xF0,0x07,0x1F,0x37,0x4F,0x66},
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tmsK9[] = {0xC0,0xD4,0xE8,0xFC,0x10,0x25,0x39,0x4D},
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tmsK10[] = {0xCD,0xDF,0xF1,0x04,0x16,0x20,0x3B,0x4D},
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chirp[] = {0x00,0x2A,0xD4,0x32,0xB2,0x12,0x25,0x14,
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0x02,0xE1,0xC5,0x02,0x5F,0x5A,0x05,0x0F,
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0x26,0xFC,0xA5,0xA5,0xD6,0xDD,0xDC,0xFC,
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0x25,0x2B,0x22,0x21,0x0F,0xFF,0xF8,0xEE,
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0xED,0xEF,0xF7,0xF6,0xFA,0x00,0x03,0x02,0x01};
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static const uint8_t PROGMEM
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tmsEnergy[] = {0x00,0x02,0x03,0x04,0x05,0x07,0x0A,0x0F,
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0x14,0x20,0x29,0x39,0x51,0x72,0xA1,0xFF},
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tmsPeriod[] = {0x00,0x10,0x11,0x12,0x13,0x14,0x15,0x16,
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0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,
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0x1F,0x20,0x21,0x22,0x23,0x24,0x25,0x26,
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0x27,0x28,0x29,0x2A,0x2B,0x2D,0x2F,0x31,
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0x33,0x35,0x36,0x39,0x3B,0x3D,0x3F,0x42,
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0x45,0x47,0x49,0x4D,0x4F,0x51,0x55,0x57,
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0x5C,0x5F,0x63,0x66,0x6A,0x6E,0x73,0x77,
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0x7B,0x80,0x85,0x8A,0x8F,0x95,0x9A,0xA0};
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// Constructor for PWM mode
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Talkie::Talkie(void) {
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#if defined(__AVR_ATmega32U4__)
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pinMode(5, OUTPUT); // !OC4A
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#else
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pinMode(3, OUTPUT); // OC2B
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#endif
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#ifdef PIEZO
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pinMode(11, OUTPUT); // OC2A
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#endif
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csBitMask = 0; // DAC not in use
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}
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// Constructor for DAC mode
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Talkie::Talkie(uint8_t cs, uint8_t clk, uint8_t dat) {
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csPort = portOutputRegister(digitalPinToPort(cs));
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csBitMask = digitalPinToBitMask(cs);
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clkPort = portOutputRegister(digitalPinToPort(clk));
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clkBitMask = digitalPinToBitMask(clk);
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datPort = portOutputRegister(digitalPinToPort(dat));
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datBitMask = digitalPinToBitMask(dat);
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pinMode(cs , OUTPUT);
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pinMode(clk, OUTPUT);
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pinMode(dat, OUTPUT);
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*csPort |= csBitMask; // Deselect
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*clkPort &= ~clkBitMask; // Clock low
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}
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void Talkie::say(const uint8_t *addr, boolean block) {
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// Enable the speech system whenever say() is called.
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if(!csBitMask) {
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#if defined(__AVR_ATmega32U4__)
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// Set up Timer4 for fast PWM on !OC4A
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PLLFRQ = (PLLFRQ & 0xCF) | 0x30; // Route PLL to async clk
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TCCR4A = _BV(COM4A0) | _BV(PWM4A); // Clear on match, PWMA on
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TCCR4B = _BV(PWM4X) |_BV(CS40); // PWM invert, 1:1 prescale
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TCCR4D = 0; // Fast PWM mode
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TCCR4E = 0; // Not enhanced mode
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TC4H = 0; // Not 10-bit mode
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DT4 = 0; // No dead time
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OCR4C = 255; // TOP
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OCR4A = 127; // 50% duty to start
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#else
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// Set up Timer2 for 8-bit, 62500 Hz PWM on OC2B
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TCCR2A = _BV(COM2B1) | _BV(WGM21) | _BV(WGM20);
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TCCR2B = _BV(CS20); // No prescale
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TIMSK2 = 0; // No interrupt
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OCR2B = 0x80; // 50% duty cycle
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#ifdef PIEZO
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OCR2A = 0x80;
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TCCR2A |= _BV(COM2A1) | _BV(COM2A0); // OC2A inverting mode
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#endif
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#endif
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}
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// Reset synth state and 'ROM' reader
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x0 = x1 = x2 = x3 = x4 = x5 = x6 = x7 = x8 =
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periodCounter = buf = bufBits = 0;
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ptrAddr = addr;
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interruptCount = TICKS; // modif rate
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// Set up Timer1 to trigger periodic synth calc at 'FS' Hz
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TCCR1A = 0; // No output
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TCCR1B = _BV(WGM12) | _BV(CS10); // CTC mode, no prescale
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//OCR1A = ((F_CPU + (FS / 2)) / FS) - 1; // 'FS' Hz (w/rounding)
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OCR1A = F_CPU / FS;
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TCNT1 = 0; // Reset counter
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TIMSK1 = _BV(OCIE1A); // Compare match interrupt on
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if(block) while(TIMSK1 & _BV(OCIE1A));
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slower= map(analogRead(0),0,1023,600,0);
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}
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boolean Talkie::talking(void) {
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return TIMSK1 & _BV(OCIE1A);
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}
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static inline uint8_t rev(uint8_t a) { // Reverse bit sequence in 8-bit value
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a = ( a >> 4) | ( a << 4); // 76543210 -> 32107654
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a = ((a & 0xCC) >> 2) | ((a & 0x33) << 2); // 32107654 -> 10325476
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a = ((a & 0xAA) >> 1) | ((a & 0x55) << 1); // 10325476 -> 01234567
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return a;
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}
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static uint8_t getBits(uint8_t bits) {
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uint8_t value;
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if(bits > bufBits) {
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buf |= rev(pgm_read_byte(ptrAddr)) << (8 - bufBits);
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bufBits += 8;
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ptrAddr++; // Don't post-inc in pgm_read_byte! Is a macro.
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}
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value = buf >> (16 - bits);
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buf <<= bits;
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bufBits -= bits;
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return value;
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}
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static void dacOut(uint8_t value) {
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uint8_t bit;
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*csPort &= ~csBitMask; // Select DAC
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// Clock out 4 bits DAC config (not in loop because it's constant)
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*datPort &= ~datBitMask; // 0 = Select DAC A, unbuffered
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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*datPort |= datBitMask; // 1X gain, enable = 1
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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// Output is expanded from 8 to 12 bits for DAC. Perhaps the
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// synthesizer math could be fiddled to generate 12-bit values.
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for(bit=0x80; bit; bit>>=1) { // Clock out first 8 bits of data
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if(value & bit) *datPort |= datBitMask;
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else *datPort &= ~datBitMask;
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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}
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for(bit=0x80; bit >= 0x10; bit>>=1) { // Low 4 bits = repeat hi 4
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if(value & bit) *datPort |= datBitMask;
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else *datPort &= ~datBitMask;
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*clkPort |= clkBitMask; *clkPort &= ~clkBitMask;
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}
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*csPort |= csBitMask; // Unselect DAC
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}
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#define read8(base, bits) pgm_read_byte(&base[getBits(bits)]);
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#define read16(base, bits) pgm_read_word(&base[getBits(bits)]);
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ISR(TIMER1_COMPA_vect) {
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int16_t u0;
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if(csBitMask) dacOut(nextPwm);
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#if defined(__AVR_ATmega32U4__)
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else OCR4A = nextPwm;
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#else
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#ifdef PIEZO
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else OCR2A = OCR2B = nextPwm;
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#else
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else OCR2B = nextPwm;
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#endif
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#endif
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if(++interruptCount >= TICKS+slower){
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// Read speech data, processing the variable size frames
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uint8_t energy;
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if((energy = getBits(4)) == 0) { // Rest frame
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synthEnergy = 0;
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} else if(energy == 0xF) { // Stop frame; silence
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TIMSK1 &= ~_BV(OCIE1A); // Stop interrupt
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nextPwm = 0x80; // Neutral
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if(csBitMask) {
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dacOut(nextPwm);
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} else {
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// Stop PWM out:
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#if defined(__AVR_ATmega32U4__)
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TCCR4A = 0;
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#else
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//TCCR2A = 0; // to avoid "Plop" between speech
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#endif
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}
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return;
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} else {
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synthEnergy = pgm_read_byte(&tmsEnergy[energy]);
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uint8_t repeat = getBits(1);
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synthPeriod = pgm_read_byte(&tmsPeriod[getBits(6)]);
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if(!repeat) { // A repeat frame uses last coefficients
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synthK1 = read16(tmsK1, 5); // All frames
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synthK2 = read16(tmsK2, 5); // use the first
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synthK3 = read8( tmsK3, 4); // 4 coefficients
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synthK4 = read8( tmsK4, 4);
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if(synthPeriod) {
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synthK5 = read8(tmsK5 , 4); // Voiced
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synthK6 = read8(tmsK6 , 4); // frames
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synthK7 = read8(tmsK7 , 4); // use
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synthK8 = read8(tmsK8 , 3); // six
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synthK9 = read8(tmsK9 , 3); // extra
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synthK10 = read8(tmsK10, 3); // coeffs
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}
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}
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}
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interruptCount = 0;
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}
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if(synthPeriod) { // Voiced source
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if(++periodCounter >= synthPeriod) periodCounter = 0;
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u0 = (periodCounter >= sizeof(chirp)) ? 0 :
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(pgm_read_byte(&chirp[periodCounter]) *
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(uint32_t)synthEnergy) >> 8;
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} else { // Unvoiced source
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synthRand = (synthRand >> 1) ^ ((synthRand & 1) ? 0xB800 : 0);
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u0 = (synthRand & 1) ? synthEnergy : -synthEnergy;
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}
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u0 -= ((synthK10 * x9) +
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(synthK9 * x8)) >> 7;
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x9 = x8 + ((synthK9 * u0 ) >> 7);
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u0 -= ((synthK8 * x7 ) >> 7);
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x8 = x7 + ((synthK8 * u0 ) >> 7);
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u0 -= ((synthK7 * x6 ) >> 7);
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x7 = x6 + ((synthK7 * u0 ) >> 7);
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u0 -= ((synthK6 * x5 ) >> 7);
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x6 = x5 + ((synthK6 * u0 ) >> 7);
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u0 -= ((synthK5 * x4 ) >> 7);
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x5 = x4 + ((synthK5 * u0 ) >> 7);
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u0 -= ((synthK4 * x3 ) >> 7);
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x4 = x3 + ((synthK4 * u0 ) >> 7);
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u0 -= ((synthK3 * x2 ) >> 7);
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x3 = x2 + ((synthK3 * u0 ) >> 7);
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u0 -= ((synthK2 * (int32_t)x1 ) >> 15);
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x2 = x1 + ((synthK2 * (int32_t)u0 ) >> 15);
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u0 -= ((synthK1 * (int32_t)x0 ) >> 15);
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x1 = x0 + ((synthK1 * (int32_t)u0 ) >> 15);
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if( u0 > 511) u0 = 511; // Output clamp
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else if(u0 < -512) u0 = -512;
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x0 = u0;
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nextPwm = (u0 >> 2) + 0x80;
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}
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@ -0,0 +1,20 @@
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// Talkie library
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// Copyright 2011 Peter Knight
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// Adafruit library modified by Jean-Luc Deladrière
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// This code is released under GPLv2 license.
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#ifndef _Talkie_h_
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#define _Talkie_h_
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#include <Arduino.h>
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class Talkie {
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public:
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Talkie(void); // PWM
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Talkie(uint8_t cs, uint8_t clk, uint8_t dat); // DAC
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void say(const uint8_t *address, boolean block=true);
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boolean talking(void); // Poll this when block=false
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};
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#endif
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