1602.h

AVR ATMEGA32可以同时四路PWM输出

#include <iom16v.h>
//#include "lcd1602.h"
//PortA(0.1.2) for control pin and PortB for data and com

#define RS_CLR PORTA &= ~(1 << PA2)
#define RS_SET PORTA |= (1 << PA2)
#define RW_CLR PORTA &= ~(1 << PA1)
#define RW_SET PORTA |= (1 << PA1)
#define EN_CLR PORTA &= ~(1 << PA0)
#define EN_SET PORTA |= (1 << PA0)
/*延时函数*/
void delay_us(unsigned int n) {
 unsigned int i;
for(i=0;i<n;i++);
}
/*延时函数*/
void delay_ms(unsigned int i) {
 unsigned int a, b;
 for (a = 1; a < i; a++) 
  for (b = 1; b<1000; b++) 
   ;  
}


/*显示屏命令写入函数*/
void LCD_write_com(unsigned char com) {
 
 RS_CLR;
 RW_CLR;
 EN_SET;
 PORTB = com;
 delay_us(5);
 EN_CLR;
}
/*显示屏命令写入函数*/
void LCD_write_data(unsigned char data) {
 RS_SET;
 RW_CLR;
 EN_SET;
 PORTB = data;
 delay_us(5);
 EN_CLR;
}
/*显示屏清空显示*/
void LCD_clear(void) {
 LCD_write_com(0x01);
 delay_ms(5);
}
/*显示屏字符串写入函数*/
void LCD_write_str(unsigned char x,unsigned char y,unsigned char *s) {
 
    if (y == 0) {
     LCD_write_com(0x80 + x);
     }
    else {
     LCD_write_com(0xC0 + x);
     }
    
    while (*s) {
     LCD_write_data( *s);
     s ++;
     }
}
/*显示屏单字符写入函数*/
void LCD_write_char(unsigned char x,unsigned char y,unsigned char data) {
 
    if (y == 0) {
     LCD_write_com(0x80 + x);
     }
    else {
     LCD_write_com(0xC0 + x);
     }
    
    LCD_write_data( data);  
}
/*显示数字函数*/
void LCD_write_num(unsigned char x,unsigned char y,unsigned char data_num) {
 
    if (y == 0) {
     LCD_write_com(0x80 + x);
     }
    else {
     LCD_write_com(0xC0 + x);
     }
    
    LCD_write_data( 48+data_num);  
}
/*显示屏初始化函数*/

void LCD_init(void) {
 
 DDRB = 0xFF;      /*I/O口方向设置*/
 DDRA |= (1 << PA0) | (1 << PA1) | (1 << PA2);
// DDRB = 0xFF;
 
 LCD_write_com(0x38);    /*显示模式设置*/
 delay_ms(5);
 LCD_write_com(0x38);
 delay_ms(5);
 LCD_write_com(0x38);
 delay_ms(5);
 LCD_write_com(0x38);
 
 LCD_write_com(0x08);    /*显示关闭*/
 LCD_write_com(0x01);    /*显示清屏*/
 LCD_write_com(0x06);    /*显示光标移动设置*/
 delay_ms(5);
 LCD_write_com(0x0C);    /*显示开及光标设置*/
}