AVR64EA48编写lcd1602的程序

下面是一个使用AVR64EA48微控制器编写LCD1602程序的示例：

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

#define LCD_DATA_PORT PORTA
#define LCD_CTRL_PORT PORTB
#define LCD_RS PB0
#define LCD_RW PB1
#define LCD_EN PB2

void lcd_command(unsigned char cmd) {
    LCD_DATA_PORT = cmd;
    LCD_CTRL_PORT &= ~(1 << LCD_RS);  // RS = 0 for command mode
    LCD_CTRL_PORT &= ~(1 << LCD_RW);  // RW = 0 for write mode
    LCD_CTRL_PORT |= (1 << LCD_EN);   // EN = 1 to enable the LCD
    _delay_ms(1);
    LCD_CTRL_PORT &= ~(1 << LCD_EN);  // EN = 0 to disable the LCD
    _delay_ms(1);
}

void lcd_data(unsigned char data) {
    LCD_DATA_PORT = data;
    LCD_CTRL_PORT |= (1 << LCD_RS);    // RS = 1 for data mode
    LCD_CTRL_PORT &= ~(1 << LCD_RW);   // RW = 0 for write mode
    LCD_CTRL_PORT |= (1 << LCD_EN);    // EN = 1 to enable the LCD
    _delay_ms(1);
    LCD_CTRL_PORT &= ~(1 << LCD_EN);   // EN = 0 to disable the LCD
    _delay_ms(1);
}

void lcd_init() {
    lcd_command(0x38);  // 2 lines, 5x7 matrix
    lcd_command(0x0C);  // display on, cursor off
    lcd_command(0x06);  // increment cursor
    lcd_command(0x01);  // clear display
}

void lcd_clear() {
    lcd_command(0x01);  // clear display
}

void lcd_set_cursor(uint8_t row, uint8_t col) {
    uint8_t row_offsets[] = {0x00, 0x40};
    lcd_command(0x80 | (row_offsets[row] + col));
}

void lcd_write_string(const char* str) {
    while (*str) {
        lcd_data(*str++);
    }
}

int main() {
    // 初始化I/O端口
    DDRA = 0xFF;  // 将PORTA设置为输出模式
    DDRB = 0x07;  // 将PB0、PB1、PB2设置为输出模式

    // 初始化LCD
    lcd_init();

    // 显示温湿度信息
    lcd_set_cursor(0, 0);
    lcd_write_string("Temperature:");
    lcd_set_cursor(1, 0);
    lcd_write_string("Humidity:");

    while (1) {
        // 获取温湿度数据，并将其转换为字符串
        int temperature = read_temperature();
        int humidity = read_humidity();
        char temperature_str[10];
        char humidity_str[10];
        sprintf(temperature_str, "%d C", temperature);
        sprintf(humidity_str, "%d %%", humidity);

        // 更新LCD显示
        lcd_set_cursor(0, 12);
        lcd_write_string(temperature_str);
        lcd_set_cursor(1, 10);
        lcd_write_string(humidity_str);

        _delay_ms(1000);
    }

    return 0;
}

请注意，上述代码仅为示例，其中的`read_temperature()`和`read_humidity()`函数需要根据具体的硬件和传感器进行实现。此外，你可能需要根据你的硬件连接情况进行相应的调整。

希望这个示例程序对你有所帮助！