202duino w/ ATtiny412 で 指定波形で音楽再生＜DAC版＞ [Arduino]
波形を指定および、DACで出力をしてみました。
ATtiny412使用です。
ダイレクトにスピーカにつなぐと音が割れました。
可変抵抗で割れないところに調整。
録音にはセラミックコンデンサーを挟んでみました。いいのか悪いのかは不明。
ATtiny412使用です。
ダイレクトにスピーカにつなぐと音が割れました。
可変抵抗で割れないところに調整。
録音にはセラミックコンデンサーを挟んでみました。いいのか悪いのかは不明。
// megaTinyCore ATtiny212/412 Score Replay Sketch (waveform, DAC)
#include "notes2.h" // Definition data of notes ( pitch (scale & octave), and note value (length))
#define MAX_TRACK (4) // Maximum number of tracks
// 256 times the Wave Form subscript to advance in one cycle @ basic 12-note scale (from C9 to B9) (@20MHz, with an interrupt every 256clocks)
static const uint16_t OCTAVE9[] = { 7023, 7441, 7883, 8352, 8848, 9375, 9932, 10523,11148,11811,12513,13258 };
// waveform data
static const uint8_t SQUARE256[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255 };
static const uint8_t SAWTOOTH256[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111, 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207, 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239, 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255 };
static const uint8_t SINE256[] = {
0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9, 10, 11, 12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35,
37, 40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76, 79, 82, 85, 88, 90, 93, 97,100,103,106,109,112,115,118,121,124,
128,131,134,137,140,143,146,149,152,155,158,162,165,167,170,173, 176,179,182,185,188,190,193,196,198,201,203,206,208,211,213,215,
218,220,222,224,226,228,230,232,234,235,237,238,240,241,243,244, 245,246,248,249,250,250,251,252,253,253,254,254,254,255,255,255,
255,255,255,255,254,254,254,253,253,252,251,250,250,249,248,246, 245,244,243,241,240,238,237,235,234,232,230,228,226,224,222,220,
218,215,213,211,208,206,203,201,198,196,193,190,188,185,182,179, 176,173,170,167,165,162,158,155,152,149,146,143,140,137,134,131,
128,124,121,118,115,112,109,106,103,100, 97, 93, 90, 88, 85, 82, 79, 76, 73, 70, 67, 65, 62, 59, 57, 54, 52, 49, 47, 44, 42, 40,
37, 35, 33, 31, 29, 27, 25, 23, 21, 20, 18, 17, 15, 14, 12, 11, 10, 9, 7, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0, 0 };
static const uint8_t PIANO256[] = {
0, 0, 0, 1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9, 10, 11, 11, 12, 13, 13, 14, 15, 17, 18, 20, 22, 25, 28, 32, 36, 40,
45, 51, 57, 63, 70, 77, 85, 93,101,110,119,128,136,145,154,162, 170,178,185,192,198,204,210,215,219,223,227,230,233,235,237,238,
240,241,242,242,243,244,244,245,246,246,247,248,249,250,250,251, 252,253,253,254,255,255,255,255,255,254,254,253,252,251,249,248,
246,244,243,241,239,237,236,234,233,231,230,229,228,227,226,226, 225,225,224,224,224,223,223,222,221,221,220,218,217,215,214,212,
209,207,205,202,200,197,194,192,189,187,185,183,181,179,178,177, 176,175,175,174,174,174,174,174,173,173,173,173,172,171,170,168,
166,164,162,159,156,152,149,145,141,136,132,128,123,119,114,110, 106,103, 99, 96, 93, 91, 89, 87, 85, 84, 83, 82, 82, 82, 82, 81,
81, 81, 81, 81, 80, 80, 79, 78, 77, 76, 74, 72, 70, 68, 66, 63, 61, 58, 55, 53, 50, 48, 46, 43, 41, 40, 38, 37, 35, 34, 34, 33,
32, 32, 31, 31, 31, 30, 30, 29, 29, 28, 27, 26, 25, 24, 22, 21, 19, 18, 16, 14, 12, 11, 9, 7, 6, 4, 3, 2, 1, 1, 0, 0 };
// music data
static const uint16_t Jesus[] = { // J.S.Bach "Jesu, Joy of Man's Desiring"
125 , 0 ,
b4e , g4e , a4e , b4e , d5e , c5e , c5e , e5e , d5e , d5e , g5e , F5e , g5e , d5e , b4e , g4e , a4e , b4e ,
e4e , d5e , c5e , b4e , a4e , g4e , d4e , g4e , F4e , g4e , b4e , d5e , g5hd, 0 ,
d4q , F4e , g4q , F4e , g4q , a4e , b4q , a4e , b4q , g4e , e4q , g4e ,
a4q , F4e , g4q , e4e , a3q , c4e , b3w , 0 ,
g3qd , e3qd , c3qd , b2qd , e3qd , d3qd ,
c3qd , C3qd , d3qd , g2w , 0 , 0 };
void setup(){ // Register Settings
TCB0.CTRLA = TCB_CLKSEL_CLKDIV1_gc | TCB_ENABLE_bm; // 20MHz / 1 / 256 -> 78,125Hz
TCB0.CTRLB = TCB_CNTMODE_PWM8_gc | TCB_CCMPEN_bm; // 8-Bit PWM mode, Output Enable (WO,PA6,megaTinyCore:P0)
TCB0.CCMPL = 0xff; // top value = 255
TCB0.CCMPH = 0; // output value
VREF.CTRLA |= VREF_DAC0REFSEL_4V34_gc; // Voltage reference at 4.34V
VREF.CTRLB |= VREF_DAC0REFEN_bm; // DAC0/AC0 reference enable: enabled
delayMicroseconds(25); // Wait VREF start-up time
PORTA.PIN6CTRL &= ~PORT_ISC_gm; // Disable digital input buffer
PORTA.PIN6CTRL |= PORT_ISC_INPUT_DISABLE_gc;
PORTA.PIN6CTRL &= ~PORT_PULLUPEN_bm; // Disable pull-up resistor
DAC0.CTRLA = DAC_ENABLE_bm | DAC_OUTEN_bm; // Enable DAC, Output Buffer
}
void loop(){
play212wf( Jesus , SQUARE256 ); // Playback
play212wf( Jesus , SAWTOOTH256 ); // Playback
play212wf( Jesus , SINE256 ); // Playback
play212wf( Jesus , PIANO256 ); // Playback
}
void play212wf( const uint16_t *d, const uint8_t *wf ){ // ATtiny212(20MHz) waveform version
uint8_t Tracks; // Number of tracks
const uint16_t *NoteP[MAX_TRACK]; // Pointer for each track of the score
uint16_t NoteCycle, n; // Number of interrupt cycles required for the length of the reference note (96th note) and its counter (n)
uint16_t note; // Note (pitch + note value) information read from PROGMEM
uint8_t len[MAX_TRACK]; // Length of note (how many 96th notes) (subtraction counter)
uint16_t cyc[MAX_TRACK], c[MAX_TRACK];// 256 times the Wave Table subscript to advance in one cycle (cyc) and its counter (c)
uint16_t env[MAX_TRACK]; // Sound amplitude (envelope)
uint8_t lap = 30; // Sound transitional cycles(laptime) (for Attenuation calculator)
// *** Preparing Scores ***
NoteCycle = F_CPU / 256 *4*60 / *d++ / MIN_NOTE; // Number of cycles required for reference note
for( Tracks = 0; Tracks < MAX_TRACK; ) { // Get the number of tracks and the start position of each track from the song data
if( *d++ != 0 ) continue; // Skip until the break comes
if( *d == 0 ) break; // If two zeros follow, end of data
len[ Tracks ] = 1; // Initialize the note length subtraction counter to the remaining 1
NoteP[ Tracks++ ] = d; // Get location in memory, Count up the number of tracks
}
n = Tracks; // Initialize the score processing so that it can be performed immediately after the start of the do loop
// *** Playback ***
do {
// * Processing Scores *
if( --n < Tracks ) { // Processing of score for each reference note length
if( !--len[n] ) {
note = *NoteP[n]++;
len[n] = (uint8_t) note; // The lower 8 bits are the length of the note (how many times the length of a 96th note)
if( note & 0xff00 ) { // If not a rest... (Leave a lingering sound even with rests)
cyc[n] = OCTAVE9[ (note>>8) & 0x0f ] >> (9 - (note>>12)); // 256 times the Wave Tabele subscript to advance in one cycle
c[n] = 0; // Initializes a counter for the number of cycles to create one waveform cycle
env[n] = 0xffff; // Initially, the maximum amplitude
}
}
if( !n ) n = NoteCycle;
}
// * Waveform Processing / Output *
switch( Tracks ) { // Change output by number of tracks
case 1: DAC0.DATA = wf[ (c[0]+=cyc[0])>>8 ] * (env[0]>> 8) >>8; // 8x8=16bit -> 8bit
break;
case 2: DAC0.DATA = ( wf[ (c[0]+=cyc[0])>>8 ] * (env[0]>> 9) // 8x7=15bit
+ wf[ (c[1]+=cyc[1])>>8 ] * (env[1]>> 9) )>>8; // 8x7=15bit 15/15(16bit)-> 8bit
break;
case 3: DAC0.DATA = ( wf[ (c[0]+=cyc[0])>>8 ] * (env[0]>> 9) // 8x7=15bit
+ wf[ (c[1]+=cyc[1])>>8 ] * (env[1]>>10) // 8x6=14bit
+ wf[ (c[2]+=cyc[2])>>8 ] * (env[2]>>10) )>>8; // 8x6=14bit 15/14/14(16bit)-> 8bit
break;
case 4: DAC0.DATA = ( wf[ (c[0]+=cyc[0])>>8 ] * (env[0]>>10) // 8x6=14bit
+ wf[ (c[1]+=cyc[1])>>8 ] * (env[1]>>10) // 8x6=14bit
+ wf[ (c[2]+=cyc[2])>>8 ] * (env[2]>>10) // 8x6=14bit
+ wf[ (c[3]+=cyc[3])>>8 ] * (env[3]>>10) )>>8; // 8x6=14bit 14/14/14/14(16bit)-> 8bit
}
switch( --lap ) { // Amplitude attenuation (Distribute processing per loop)
case 4: env[3] -= (env[3]>>9); break;
case 3: env[2] -= (env[2]>>9); break;
case 2: env[1] -= (env[1]>>9); break;
case 1: env[0] -= (env[0]>>9); break;
case 0: lap = 30; // every 384usec(12.8usec*30) @20MHz (Adjustable)
}
while( !TCB0.INTFLAGS ); // Waiting for TCB0 overflow (every 12,8usec(78,125Hz))
TCB0.INTFLAGS = TCB_CAPT_bm; // cleared by writing a '1'
} while( note ); // Exit if note data is 0
DAC0.DATA = 0; // Set output to 0
}
