用MC9S08AC16写的一个简单的时钟

冷火团队-小江

使用MC9S08AC16的Timer做一个时钟，并在LCD1602上显示
 
lcd1602.h
#ifndef _NICROSYSTEM_FREESCALE_S08_DEVKIT_LCD1602_H_
#define _NICROSYSTEM_FREESCALE_S08_DEVKIT_LCD1602_H_
unsigned char lcd_status(void);
void lcd_init(void);
void lcd_write_char(unsigned char x,unsigned char y, unsigned char ch);
void lcd_write_str(unsigned char x,unsigned char y,unsigned char *s);
void lcd_write_data(unsigned char data);
void lcd_write_cmd(unsigned char cmd);
#endif
lcd1602.c
#include "lcd1602.h"
#include "derivative.h"

#define LCD_DATA  PTED
#define LCD_DATA_DIR  PTEDD
#define LCD_DATA_DS   PTEDS
#define LCDRS     PTAD_PTAD0
#define LCDRW     PTAD_PTAD1
#define LCDE      PTBD_PTBD0
#define LCDRS_DIR PTADD_PTADD0
#define LCDRW_DIR PTADD_PTADD1
#define LCDE_DIR  PTBDD_PTBDD0
#define LCDE_DS   PTBDS_PTBDS0
#define LCDRS_DS  PTADS_PTADS0
#define LCDRW_DS  PTADS_PTADS1

void lcd_clear(void);
void lcd_write_cmd(unsigned char cmd);
 
void init_lcd() {
 
  LCD_DATA_DIR=0xff;
  LCDRS_DIR=1;
  LCDRW_DIR=1;
  LCDE_DIR=1;
  LCDRS_DS=1;
  LCDRW_DS=1;
  LCDE_DS=1;
  LCD_DATA_DS=0xff;
 
 LCD_DATA=0;
 LCDE=1;
 
 asm("nop");
 asm("nop");
 asm("nop");
 asm("nop");
 asm("nop");
 asm("nop");
 
 lcd_clear();
 lcd_write_cmd(0x38);//设置lcd功能：8位总线，双行显示，5X7点阵字符
 lcd_write_cmd(0x0f);//显示开关控制：显示ON,光标ON,闪烁ON
 lcd_write_cmd(0x06);//光标输入方式增量移位
 lcd_write_cmd(0x80);
}

unsigned char lcd_status() {
 
    byte lcdstatus;
    LCD_DATA_DIR=0x00;
    LCDRS=0;
    LCDRW=1;
    LCDE=0;
    asm("nop");
    asm("nop");
    asm("nop");
   asm("nop");
    LCDE=1;
   
   
    lcdstatus=LCD_DATA;
    LCD_DATA_DIR=0xff;
    return lcdstatus;
}

void lcd_write_cmd(unsigned char cmd) {
   
    byte status;
    LCD_DATA=cmd;
    LCDRS=0;
    LCDRW=0;
    LCDE=0;
    asm("nop");
    asm("nop");
    asm("nop");
   asm("nop");
    do{
      status=lcd_status();
    }
    while(status&0x80);
    LCDE=1;
}
 
void lcd_clear(void) {
 
  lcd_write_cmd(0x01);
}
 
void lcd_write_data(unsigned char data) {
 
   byte status;
   LCD_DATA=data;
   LCDRS=1;
   LCDRW=0;
   LCDE=0;
    asm("nop");
    asm("nop");
    asm("nop");
   asm("nop");
   
   do{
    status=lcd_status();
   }
   while(status&0x80);
   LCDE=1;
}  
 
void lcd_write_char(unsigned char x,unsigned char y,unsigned char ch) {
 
  if(y)
   lcd_write_cmd(0xc0+x);
  else
   lcd_write_cmd(0x80+x);
 
  lcd_write_data(ch);
}
  

void lcd_write_str(unsigned char x,unsigned char y,char*s) {
   
    if(y)
    
     lcd_write_cmd(0xc0+x);
    else
     lcd_write_cmd(0x80+x);
    
    while(*s){
      
    lcd_write_data(*s);
    s++;
  }
}
   
main.c
 

#include  /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
#include "mc9s08ac16.h"
#include "lcd1602.h"

const unsigned char table[10]={'0','1','2','3','4','5','6','7','8','9'}; 
unsigned char hour=11,minute=20,second=0;
unsigned char con_result[9];

void init_system_clk(void)
{
 
  ICGC1=0xf8;
  ICGC2=0x89;
  while(ICGS1_LOCK==0);
}
 
void convert() /*covert numeric data to char data,for instance,1 to '1' */
{
  unsigned char  tens,unit;
  tens=second/10;
  unit=second%10;
  con_result[7]=table[unit];
  con_result[6]=table[tens];
 
  tens=minute/10;
  unit=minute%10;
  con_result[4]=table[unit];
  con_result[3]=table[tens];
 
  tens=hour/10;
  unit=hour%10;
  con_result[1]=table[unit];
  con_result[0]=table[tens];
 
  con_result[8]='\0';
  con_result[2]=':';
  con_result[5]=':';
}
 
 

interrupt VectorNumber_Vtpm1ovf void TMP1_OVF_ISR(void)
{ 
  
  
   DisableInterrupts;
   TPM1SC_TOF=0;
  
  
   second++;
   if(second>59)
    {
     minute++;
     second=0;
    }
   if(minute>59)
  
   {
    hour++;
    minute=0;
   }
   if(hour>23)
  
   {
    hour=0;
   }
  
  convert();
 
  lcd_write_str(4,1,con_result);
  lcd_write_cmd(0x0c);
 
  EnableInterrupts;
}
   
   
  
  
 

void main(void)
{
  EnableInterrupts; /* enable interrupts */
  /* include your code here */
 
  SOPT_COPE=0;
  init_system_clk();
  init_lcd();
  lcd_write_str(2,0,"NicroSystem");
 
  TPM1SC=0x4e;
  TPM1MODH=0xf4;
  TPM1MODL=0x24;
 
  for(;;) {
    //__RESET_WATCHDOG(); /* feeds the dog */
  } /* loop forever */
  /* please make sure that you never leave main */
}
 

阅读全文