添加一些关于midi播放的项目

Midi/music-box-avr-master/main.c

@@ -0,0 +1,82 @@
+#include <avr/io.h>
+#include <stdio.h>
+#include <avr/interrupt.h>
+#include "Player.h"
+
+extern void TestProcess(void);
+extern const unsigned char Score[];
+Player mainPlayer;
+
+static int uart0_putchar(char c, FILE *stream);
+
+static FILE uart0Stdout = FDEV_SETUP_STREAM(uart0_putchar, NULL,
+											_FDEV_SETUP_WRITE);
+
+static int
+uart0_putchar(char c, FILE *stream)
+{
+	/* Wait for empty transmit buffer */
+	while (!(UCSR0A & (1 << UDRE0)))
+		;
+	UDR0 = c;
+	return 0;
+}
+
+/* Initialize UART */
+void USART0_Init(uint32_t baud)
+{
+	/* Set the baud rate */
+	uint16_t baudRegVal = (uint32_t)F_CPU / 8 / baud - 1;
+	UBRR0H = (unsigned char)(baudRegVal >> 8);
+	UBRR0L = (unsigned char)baudRegVal;
+
+	/* Enable UART receiver and transmitter */
+	UCSR0B = ((1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0));
+	UCSR0A |= 1 << U2X0;
+
+	/* Set frame format: 8 data 2stop */
+	UCSR0C = (1 << USBS0) | (1 << UCSZ01) | (1 << UCSZ00);
+}
+
+void TIMER_Init()
+{
+	PORTB = 0b001101; //Initalize Port B
+	DDRB = 0b000111;
+
+	TCCR1A = 0b10100001;
+	//ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 ; Fast PWM pclk/1
+	TCCR1B = 0b00001001;
+
+	OCR0A = 62; //Initalize TC0 in 32 kHz interval timer ( pclk=16M )
+	TCCR0A = 0b00000010;
+	TCCR0B = 0b00000010;  //pclk/8
+	TIMSK0 = 1 << OCIE0A; //Enable timer interrupt
+}
+
+ISR(USART_RX_vect)
+{
+	unsigned char data;
+	data = UDR0;
+	/* Calculate buffer index */
+}
+
+int main(void)
+{
+	CLKPR = 0b10000000;
+	USART0_Init(115200);
+	stdout = &uart0Stdout;
+	printf("UART works!\n");
+#ifndef RUN_TEST
+	PlayerInit(&mainPlayer, &synthForAsm);
+	TIMER_Init();
+	sei();
+	PlayerPlay(&mainPlayer, (uint8_t *)Score);
+	while (1)
+	{
+		PlayerProcess(&mainPlayer);
+	}
+#else
+	TestProcess();
+#endif
+	return 0;
+}