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標題: Atmel ATtiny2313-20PU 聲控地球儀自動顯示 [打印本頁]

作者: 洪嵐峰 時間: 2023-4-8 08:45
標題: Atmel ATtiny2313-20PU 聲控地球儀自動顯示
製作聲控地球儀所需的零件清單如下：

Atmel ATtiny2313-20PU 微控制器
MAX4466 麥克風放大器模塊
3D列印的地球儀模型
SG90 9克微型伺服馬達
L293D 馬達驅動器IC
HC-05 藍牙模組
5V 電源供應器
電線、焊錫、焊接工具等
連接腳位如下：

ATtiny2313 MAX4466 SG90 L293D HC-05
PB0 OUT - - TXD
PB1 - SIGNAL IN1 RXD
PB2 - VCC VCC VCC
PB3 - GND GND GND
PB4 - - IN2 -
PB5 - - ENABLE -
程式碼如下：

#include <avr/io.h>
#include <util/delay.h>
#include <string.h>

#define F_CPU 1000000UL
#define BAUD 9600
#define MYUBRR F_CPU/16/BAUD-1

void usart_init(unsigned int ubrr) {
UBRRH = (unsigned char)(ubrr >> 8);
UBRRL = (unsigned char)ubrr;
UCSRB = (1 << RXEN) | (1 << TXEN);
UCSRC = (1 << URSEL) | (1 << USBS) | (3 << UCSZ0);
}

void usart_transmit(unsigned char data) {
while (!(UCSRA & (1 << UDRE)));
UDR = data;
}

void servo_write(int angle) {
OCR1A = (unsigned int)(2000 + angle * 11.11); // calculate duty cycle for given angle
_delay_ms(500);
}

int main(void) {
DDRB |= (1 << PB4) | (1 << PB5); // configure motor driver pins as outputs
PORTB &= ~((1 << PB4) | (1 << PB5)); // set motor driver pins to low

TCCR1A |= (1 << COM1A1) | (1 << WGM11); // configure timer1 for fast PWM mode
TCCR1B |= (1 << WGM13) | (1 << WGM12) | (1 << CS11); // prescaler = 8
ICR1 = 20000; // f_PWM = 50 Hz
servo_write(0); // initial position

usart_init(MYUBRR); // initialize USART

while (1) {
      unsigned char data;
      while (!(UCSRA & (1 << RXC))); // wait for data to be received
      data = UDR;

      if (data == 'N') { // North
         servo_write(0);
      } else if (data == 'S') { // South
         servo_write(180);
      } else if (data == 'E') { // East

Copy code
      servo_write(90);
} else if (data == 'W') { // West
      servo_write(270);
}
}
}

這個程式使用了ATtiny2313的PWM功能控制SG90微型伺服馬達的角度，當接收到HC-05藍牙模組發送的聲控指令時，會根據指令調整伺服馬達的角度，以顯示正確的地球儀方向。

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