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Acessando direto os PIOs ao invés de usar os defines de I/O

APS1-Embarcados/SAME70-Clear2/src/main.c

Lines 486 to 489 in fef0b56

    
           pio_set(PIOA,BUZ_PIO_IDX_MASK); 
        
           delay_us(t); 
        
           pio_clear(PIOA, BUZ_PIO_IDX_MASK); 
        
           delay_us(t);

O ideal aqui é usar os defines de I/O no começo do arquivo, para que se um dia trocar, não ter que mudar manualmente no código todo.

Nomes de músicas, autoria

Faltou indicar o nome das músicas, autor/artista/cantor por questões de autoria.

Arquivo separado para as notas músicas

APS1-Embarcados/SAME70-Clear2/src/main.c

Lines 177 to 265 in fef0b56

    
           #define NOTE_B0  31 
        
           #define NOTE_C1  33 
        
           #define NOTE_CS1 35 
        
           #define NOTE_D1  37 
        
           #define NOTE_DS1 39 
        
           #define NOTE_E1  41 
        
           #define NOTE_F1  44 
        
           #define NOTE_FS1 46 
        
           #define NOTE_G1  49 
        
           #define NOTE_GS1 52 
        
           #define NOTE_A1  55 
        
           #define NOTE_AS1 58 
        
           #define NOTE_B1  62 
        
           #define NOTE_C2  65 
        
           #define NOTE_CS2 69 
        
           #define NOTE_D2  73 
        
           #define NOTE_DS2 78 
        
           #define NOTE_E2  82 
        
           #define NOTE_F2  87 
        
           #define NOTE_FS2 93 
        
           #define NOTE_G2  98 
        
           #define NOTE_GS2 104 
        
           #define NOTE_A2  110 
        
           #define NOTE_AS2 117 
        
           #define NOTE_B2  123 
        
           #define NOTE_C3  131 
        
           #define NOTE_CS3 139 
        
           #define NOTE_D3  147 
        
           #define NOTE_DS3 156 
        
           #define NOTE_E3  165 
        
           #define NOTE_F3  175 
        
           #define NOTE_FS3 185 
        
           #define NOTE_G3  196 
        
           #define NOTE_GS3 208 
        
           #define NOTE_A3  220 
        
           #define NOTE_AS3 233 
        
           #define NOTE_B3  247 
        
           #define NOTE_C4  262 
        
           #define NOTE_CS4 277 
        
           #define NOTE_D4  294 
        
           #define NOTE_DS4 311 
        
           #define NOTE_E4  330 
        
           #define NOTE_F4  349 
        
           #define NOTE_FS4 370 
        
           #define NOTE_G4  392 
        
           #define NOTE_GS4 415 
        
           #define NOTE_A4  440 
        
           #define NOTE_AS4 466 
        
           #define NOTE_B4  494 
        
           #define NOTE_C5  523 
        
           #define NOTE_CS5 554 
        
           #define NOTE_D5  587 
        
           #define NOTE_DS5 622 
        
           #define NOTE_E5  659 
        
           #define NOTE_F5  698 
        
           #define NOTE_FS5 740 
        
           #define NOTE_G5  784 
        
           #define NOTE_GS5 831 
        
           #define NOTE_A5  880 
        
           #define NOTE_AS5 932 
        
           #define NOTE_B5  988 
        
           #define NOTE_C6  1047 
        
           #define NOTE_CS6 1109 
        
           #define NOTE_D6  1175 
        
           #define NOTE_DS6 1245 
        
           #define NOTE_E6  1319 
        
           #define NOTE_F6  1397 
        
           #define NOTE_FS6 1480 
        
           #define NOTE_G6  1568 
        
           #define NOTE_GS6 1661 
        
           #define NOTE_A6  1760 
        
           #define NOTE_AS6 1865 
        
           #define NOTE_B6  1976 
        
           #define NOTE_C7  2093 
        
           #define NOTE_CS7 2217 
        
           #define NOTE_D7  2349 
        
           #define NOTE_DS7 2489 
        
           #define NOTE_E7  2637 
        
           #define NOTE_F7  2794 
        
           #define NOTE_FS7 2960 
        
           #define NOTE_G7  3136 
        
           #define NOTE_GS7 3322 
        
           #define NOTE_A7  3520 
        
           #define NOTE_AS7 3729 
        
           #define NOTE_B7  3951 
        
           #define NOTE_C8  4186 
        
           #define NOTE_CS8 4435 
        
           #define NOTE_D8  4699 
        
           #define NOTE_DS8 4978

Para ficar mais organizado, os defines das notas musicais poderiam ter sido feitos em um arquivo .h, tipo notes.h e serem incluídas com #include no main.c. Melhora a leitura e facilidade de manutenção do código.

Vetores constantes devem ser declarados com const

APS1-Embarcados/SAME70-Clear2/src/main.c

Lines 268 to 371 in fef0b56

    
           int notes1[] = {       //Note of the song, 0 is a rest/pulse 
        
              NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_A4, NOTE_G4, NOTE_A4, 0, 
        
              NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_A4, NOTE_G4, NOTE_A4, 0, 
        
              NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_C5, NOTE_D5, NOTE_D5, 0,  
        
              NOTE_D5, NOTE_E5, NOTE_F5, NOTE_F5, 0, 
        
              NOTE_E5, NOTE_D5, NOTE_E5, NOTE_A4, 0, 
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_D5, NOTE_E5, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_C5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_C5, NOTE_A4, NOTE_B4, 0, 
        
              NOTE_A4, NOTE_A4,  
        
              //Repeat of first part 
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_A4, NOTE_G4, NOTE_A4, 0, 
        
              NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_A4, NOTE_G4, NOTE_A4, 0, 
        
              NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_C5, NOTE_D5, NOTE_D5, 0,  
        
              NOTE_D5, NOTE_E5, NOTE_F5, NOTE_F5, 0, 
        
              NOTE_E5, NOTE_D5, NOTE_E5, NOTE_A4, 0, 
        
              NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,  
        
              NOTE_D5, NOTE_E5, NOTE_A4, 0,  
        
              NOTE_A4, NOTE_C5, NOTE_B4, NOTE_B4, 0, 
        
              NOTE_C5, NOTE_A4, NOTE_B4, 0, 
        
              //End of Repeat 
        
              NOTE_E5, 0, 0, NOTE_F5, 0, 0, 
        
              NOTE_E5, NOTE_E5, 0, NOTE_G5, 0, NOTE_E5, NOTE_D5, 0, 0, 
        
              NOTE_D5, 0, 0, NOTE_C5, 0, 0, 
        
              NOTE_B4, NOTE_C5, 0, NOTE_B4, 0, NOTE_A4, 
        
              NOTE_E5, 0, 0, NOTE_F5, 0, 0, 
        
              NOTE_E5, NOTE_E5, 0, NOTE_G5, 0, NOTE_E5, NOTE_D5, 0, 0, 
        
              NOTE_D5, 0, 0, NOTE_C5, 0, 0, 
        
              NOTE_B4, NOTE_C5, 0, NOTE_B4, 0, NOTE_A4 
        
           }; 
        
           int notes2[] = {       //Note of the song, 0 is a rest/pulse 
        
           	0,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_B6,NOTE_A6, 
        
           	NOTE_A6,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_D7,NOTE_C7,NOTE_D7, 
        
           	NOTE_D7,NOTE_E7,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_B6,NOTE_A6, 
        
           	NOTE_A6,0,NOTE_A6,NOTE_E7,NOTE_D7, 
        
           	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6, 
        
           	0,NOTE_A6,NOTE_A6, 
        
           	0,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,0,NOTE_C7, 
        
           	NOTE_B6,NOTE_C7,NOTE_B6,0,NOTE_E6,NOTE_B6,NOTE_C7, 
        
           	NOTE_D7,0,NOTE_E7, 
        
           	NOTE_C7,NOTE_B6,NOTE_A6,0,NOTE_A6,NOTE_C7,NOTE_D7, 
        
           	NOTE_E7,NOTE_A6,NOTE_C6,NOTE_C6,NOTE_D7,NOTE_E7, 
        
           	NOTE_E7,NOTE_E7,NOTE_G5,NOTE_F5,NOTE_E7, 
        
           	NOTE_E7,0, 
        
           	0,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_B6,NOTE_A6, 
        
           	NOTE_A6,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_D7,NOTE_C7,NOTE_D7, 
        
           	NOTE_D7,NOTE_E7,0,NOTE_E6,NOTE_A6,NOTE_B6, 
        
           	NOTE_C7,NOTE_B6,NOTE_A6, 
        
           	NOTE_A6,NOTE_A6,NOTE_E7,NOTE_D7, 
        
           	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6, 
        
           	0,NOTE_A6,NOTE_A6, 
        
           	0,0,NOTE_A6,NOTE_E7,NOTE_D7, 
        
           	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6, 
        
           	0,NOTE_A6,NOTE_A6,0,NOTE_A6,NOTE_E7,NOTE_D7, 
        
           	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6, 
        
           	NOTE_A6,NOTE_A6,0 
        
           }; 
        
           int notes3[] = {       //Note of the song, 0 is a rest/pulse 
        
             NOTE_E5, NOTE_E5, NOTE_E5, 
        
             NOTE_E5, NOTE_E5, NOTE_E5, 
        
             NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, 
        
             NOTE_E5, 
        
             NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, 
        
             NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5, 
        
             NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5, 
        
             NOTE_D5, NOTE_G5 
        
           };

Se a música é um vetor constante, ele deve ser declarado como constant:

const int musica[] = {...};

Isso faz com que o GCC aloque espaço na memória ROM e não na RAM. Nos uC temos geralmente muito mais ROM que RAM.

No nosso caso são 2M de FLASH (ROM) e apenas 300k de SRAM (RAM).

Autoria do texto: Rafael Corsi

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	pio_set(PIOA,BUZ_PIO_IDX_MASK);
	delay_us(t);
	pio_clear(PIOA, BUZ_PIO_IDX_MASK);
	delay_us(t);

	#define NOTE_B0 31
	#define NOTE_C1 33
	#define NOTE_CS1 35
	#define NOTE_D1 37
	#define NOTE_DS1 39
	#define NOTE_E1 41
	#define NOTE_F1 44
	#define NOTE_FS1 46
	#define NOTE_G1 49
	#define NOTE_GS1 52
	#define NOTE_A1 55
	#define NOTE_AS1 58
	#define NOTE_B1 62
	#define NOTE_C2 65
	#define NOTE_CS2 69
	#define NOTE_D2 73
	#define NOTE_DS2 78
	#define NOTE_E2 82
	#define NOTE_F2 87
	#define NOTE_FS2 93
	#define NOTE_G2 98
	#define NOTE_GS2 104
	#define NOTE_A2 110
	#define NOTE_AS2 117
	#define NOTE_B2 123
	#define NOTE_C3 131
	#define NOTE_CS3 139
	#define NOTE_D3 147
	#define NOTE_DS3 156
	#define NOTE_E3 165
	#define NOTE_F3 175
	#define NOTE_FS3 185
	#define NOTE_G3 196
	#define NOTE_GS3 208
	#define NOTE_A3 220
	#define NOTE_AS3 233
	#define NOTE_B3 247
	#define NOTE_C4 262
	#define NOTE_CS4 277
	#define NOTE_D4 294
	#define NOTE_DS4 311
	#define NOTE_E4 330
	#define NOTE_F4 349
	#define NOTE_FS4 370
	#define NOTE_G4 392
	#define NOTE_GS4 415
	#define NOTE_A4 440
	#define NOTE_AS4 466
	#define NOTE_B4 494
	#define NOTE_C5 523
	#define NOTE_CS5 554
	#define NOTE_D5 587
	#define NOTE_DS5 622
	#define NOTE_E5 659
	#define NOTE_F5 698
	#define NOTE_FS5 740
	#define NOTE_G5 784
	#define NOTE_GS5 831
	#define NOTE_A5 880
	#define NOTE_AS5 932
	#define NOTE_B5 988
	#define NOTE_C6 1047
	#define NOTE_CS6 1109
	#define NOTE_D6 1175
	#define NOTE_DS6 1245
	#define NOTE_E6 1319
	#define NOTE_F6 1397
	#define NOTE_FS6 1480
	#define NOTE_G6 1568
	#define NOTE_GS6 1661
	#define NOTE_A6 1760
	#define NOTE_AS6 1865
	#define NOTE_B6 1976
	#define NOTE_C7 2093
	#define NOTE_CS7 2217
	#define NOTE_D7 2349
	#define NOTE_DS7 2489
	#define NOTE_E7 2637
	#define NOTE_F7 2794
	#define NOTE_FS7 2960
	#define NOTE_G7 3136
	#define NOTE_GS7 3322
	#define NOTE_A7 3520
	#define NOTE_AS7 3729
	#define NOTE_B7 3951
	#define NOTE_C8 4186
	#define NOTE_CS8 4435
	#define NOTE_D8 4699
	#define NOTE_DS8 4978

	int notes1[] = { //Note of the song, 0 is a rest/pulse
	NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,
	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0,
	NOTE_A4, NOTE_G4, NOTE_A4, 0,

	NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,
	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0,
	NOTE_A4, NOTE_G4, NOTE_A4, 0,

	NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,
	NOTE_A4, NOTE_C5, NOTE_D5, NOTE_D5, 0,
	NOTE_D5, NOTE_E5, NOTE_F5, NOTE_F5, 0,
	NOTE_E5, NOTE_D5, NOTE_E5, NOTE_A4, 0,

	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_D5, NOTE_E5, NOTE_A4, 0,
	NOTE_A4, NOTE_C5, NOTE_B4, NOTE_B4, 0,
	NOTE_C5, NOTE_A4, NOTE_B4, 0,

	NOTE_A4, NOTE_A4,
	//Repeat of first part
	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0,
	NOTE_A4, NOTE_G4, NOTE_A4, 0,

	NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,
	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_C5, NOTE_D5, NOTE_B4, NOTE_B4, 0,
	NOTE_A4, NOTE_G4, NOTE_A4, 0,

	NOTE_E4, NOTE_G4, NOTE_A4, NOTE_A4, 0,
	NOTE_A4, NOTE_C5, NOTE_D5, NOTE_D5, 0,
	NOTE_D5, NOTE_E5, NOTE_F5, NOTE_F5, 0,
	NOTE_E5, NOTE_D5, NOTE_E5, NOTE_A4, 0,

	NOTE_A4, NOTE_B4, NOTE_C5, NOTE_C5, 0,
	NOTE_D5, NOTE_E5, NOTE_A4, 0,
	NOTE_A4, NOTE_C5, NOTE_B4, NOTE_B4, 0,
	NOTE_C5, NOTE_A4, NOTE_B4, 0,
	//End of Repeat

	NOTE_E5, 0, 0, NOTE_F5, 0, 0,
	NOTE_E5, NOTE_E5, 0, NOTE_G5, 0, NOTE_E5, NOTE_D5, 0, 0,
	NOTE_D5, 0, 0, NOTE_C5, 0, 0,
	NOTE_B4, NOTE_C5, 0, NOTE_B4, 0, NOTE_A4,

	NOTE_E5, 0, 0, NOTE_F5, 0, 0,
	NOTE_E5, NOTE_E5, 0, NOTE_G5, 0, NOTE_E5, NOTE_D5, 0, 0,
	NOTE_D5, 0, 0, NOTE_C5, 0, 0,
	NOTE_B4, NOTE_C5, 0, NOTE_B4, 0, NOTE_A4
	};
	int notes2[] = { //Note of the song, 0 is a rest/pulse
	0,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,NOTE_B6,NOTE_A6,
	NOTE_A6,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,NOTE_D7,NOTE_C7,NOTE_D7,
	NOTE_D7,NOTE_E7,0,NOTE_E6,NOTE_A6,NOTE_B6,

	NOTE_C7,NOTE_B6,NOTE_A6,
	NOTE_A6,0,NOTE_A6,NOTE_E7,NOTE_D7,
	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6,
	0,NOTE_A6,NOTE_A6,

	0,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,0,NOTE_C7,
	NOTE_B6,NOTE_C7,NOTE_B6,0,NOTE_E6,NOTE_B6,NOTE_C7,
	NOTE_D7,0,NOTE_E7,

	NOTE_C7,NOTE_B6,NOTE_A6,0,NOTE_A6,NOTE_C7,NOTE_D7,
	NOTE_E7,NOTE_A6,NOTE_C6,NOTE_C6,NOTE_D7,NOTE_E7,
	NOTE_E7,NOTE_E7,NOTE_G5,NOTE_F5,NOTE_E7,
	NOTE_E7,0,

	0,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,NOTE_B6,NOTE_A6,
	NOTE_A6,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,NOTE_D7,NOTE_C7,NOTE_D7,

	NOTE_D7,NOTE_E7,0,NOTE_E6,NOTE_A6,NOTE_B6,
	NOTE_C7,NOTE_B6,NOTE_A6,
	NOTE_A6,NOTE_A6,NOTE_E7,NOTE_D7,

	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6,
	0,NOTE_A6,NOTE_A6,
	0,0,NOTE_A6,NOTE_E7,NOTE_D7,
	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6,

	0,NOTE_A6,NOTE_A6,0,NOTE_A6,NOTE_E7,NOTE_D7,
	0,NOTE_A6,NOTE_E7,NOTE_D7,0,NOTE_G6,NOTE_G6,
	NOTE_A6,NOTE_A6,0
	};

	int notes3[] = { //Note of the song, 0 is a rest/pulse
	NOTE_E5, NOTE_E5, NOTE_E5,
	NOTE_E5, NOTE_E5, NOTE_E5,
	NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5,
	NOTE_E5,
	NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
	NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
	NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5,
	NOTE_D5, NOTE_G5
	};