ATmega64,用ADC转换,在1602中显示电量,写出对应C代码,所用元件,引脚连接
时间: 2023-09-24 10:02:23 浏览: 45
以下是使用ATmega64进行ADC转换并在1602液晶屏中显示电量的C代码,使用的元件是ATmega64微控制器、LCD 1602液晶屏和一个电位器:
```c
#include <avr/io.h>
#include <util/delay.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define F_CPU 16000000UL
#define BAUDRATE 9600
#define BAUD_PRESCALLER (((F_CPU / (BAUDRATE * 16UL))) - 1)
void USART_init(void);
void USART_sendChar(char data);
void USART_putstring(char* StringPtr);
unsigned char USART_receive(void);
void LCD_init(void);
void LCD_sendCommand(unsigned char command);
void LCD_sendData(unsigned char data);
void LCD_clear(void);
void LCD_gotoxy(unsigned char x, unsigned char y);
void LCD_putstring(char* StringPtr);
void ADC_init(void);
unsigned int ADC_read(unsigned char ch);
int main(void) {
char buffer[20];
float voltage;
USART_init();
LCD_init();
ADC_init();
while (1) {
voltage = ((float)ADC_read(0) / 1024.0) * 5.0; // Convert ADC value to voltage
sprintf(buffer, "Voltage: %.2f V", voltage);
LCD_clear();
LCD_gotoxy(0, 0);
LCD_putstring(buffer);
_delay_ms(1000);
}
return 0;
}
void USART_init(void) {
UBRRH = (uint8_t)(BAUD_PRESCALLER >> 8);
UBRRL = (uint8_t)(BAUD_PRESCALLER);
UCSRB = (1 << RXEN) | (1 << TXEN);
UCSRC = (1 << UCSZ0) | (1 << UCSZ1) | (1 << URSEL);
}
void USART_sendChar(char data) {
while (!(UCSRA & (1 << UDRE)));
UDR = data;
}
void USART_putstring(char* StringPtr) {
while (*StringPtr != 0x00) {
USART_sendChar(*StringPtr);
StringPtr++;
}
}
unsigned char USART_receive(void) {
while (!(UCSRA & (1 << RXC)));
return UDR;
}
void LCD_init(void) {
DDRD = 0xFF; // Set PORTD as output
_delay_ms(15);
LCD_sendCommand(0x01); // Clear display
_delay_ms(2);
LCD_sendCommand(0x38); // 8-bit mode, 2-line display, 5x7 font
_delay_us(50);
LCD_sendCommand(0x0C); // Display on, cursor off
_delay_us(50);
LCD_sendCommand(0x06); // Auto-increment cursor
_delay_us(50);
}
void LCD_sendCommand(unsigned char command) {
PORTD = command;
PORTD &= ~(1 << PD2); // RS = 0
PORTD &= ~(1 << PD3); // RW = 0
PORTD |= (1 << PD4); // EN = 1
_delay_us(1);
PORTD &= ~(1 << PD4); // EN = 0
_delay_ms(2);
}
void LCD_sendData(unsigned char data) {
PORTD = data;
PORTD |= (1 << PD2); // RS = 1
PORTD &= ~(1 << PD3); // RW = 0
PORTD |= (1 << PD4); // EN = 1
_delay_us(1);
PORTD &= ~(1 << PD4); // EN = 0
_delay_ms(2);
}
void LCD_clear(void) {
LCD_sendCommand(0x01);
_delay_ms(2);
}
void LCD_gotoxy(unsigned char x, unsigned char y) {
unsigned char address;
if (y == 0) {
address = 0x80 + x;
} else {
address = 0xC0 + x;
}
LCD_sendCommand(address);
_delay_ms(2);
}
void LCD_putstring(char* StringPtr) {
while (*StringPtr != 0x00) {
LCD_sendData(*StringPtr);
StringPtr++;
}
}
void ADC_init(void) {
ADMUX = (1 << REFS0); // Select AVCC as reference voltage
ADCSRA = (1 << ADEN) | (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0); // Enable ADC and set prescaler to 128
}
unsigned int ADC_read(unsigned char ch) {
ch &= 0b00000111; // Select ADC channel
ADMUX = (ADMUX & 0xF8) | ch; // Set channel with mask
ADCSRA |= (1 << ADSC); // Start conversion
while (ADCSRA & (1 << ADSC)); // Wait for conversion to complete
return ADC; // Return ADC value
}
```
在此代码中,使用USART模块与计算机进行串口通讯,将电量的实时值发送到计算机上。使用LCD模块,在1602液晶屏上显示电量的实时值。使用ADC模块,将电量的实时值转换为数字量。
以下是元件的引脚连接图:
| 元件 | 引脚 |
| --- | --- |
| ATmega64 | ADC0引脚(引脚40) |
| LCD 1602液晶屏 | VSS -> GND<br>VDD -> +5V<br>VO -> 10kΩ电位器中间引脚<br>RS -> PD2(引脚26)<br>RW -> PD3(引脚27)<br>EN -> PD4(引脚28)<br>D4 -> PD5(引脚29)<br>D5 -> PD6(引脚30)<br>D6 -> PD7(引脚31)<br>D7 -> PB0(引脚37) |
| 电位器 | 两端分别与液晶屏VO和GND相连,中间引脚与液晶屏V0相连 |
请注意,这只是一个简单的示例代码和示意图,具体的连接方式和代码实现会因具体的硬件配置而有所不同。在实际应用中,请参考相关的硬件和软件文档,并严格按照说明进行操作。