lcd1602._h

1602lcd显示频率计 通过了proteus仿真

#define lcd_data_port PORTD
#define lcd_data_ddr DDRD
#define lcd_busy_pin PIND
#define lcd_busy_ddr DDRD
#define lcd_control_port PORTA
#define lcd_control_ddr DDRA

#define lcd_RS 0x01 //PORTA^0
#define lcd_RW 0x02 //PORTA^1
#define lcd_EN 0x04 //PORTA^2
#define busy 0x80 //LCD_DB7

/*----------------------------------函数声明------------------------------------------*/
void lcd_init(void);
void lcd_write_command(unsigned char command,unsigned char wait_en);
void lcd_write_data(unsigned char char_data);
void wait_enable(void);
void display_a_char(unsigned char position,unsigned char char_data);
void display_a_string(unsigned char col,unsigned char *ptr);
void delay_1ms(void);
void delay_nms(unsigned int n);

//显示的两行字符
unsigned char str1[]="   neutronlmk   ";
unsigned char str2[]=" www.miaokun.com ";