
引脚配置:
P7.0: RS
P7.1: RW
P7.2: E
P2 : 数据
代码:
void delay_ms(UINT n)
{
UINT i;
for (i=0;i<n;i++)
{
TAU0_Channel0_Start();
do
{
}
while (TimerFlag==0);
TAU0_Channel0_Stop();
TimerFlag=0;
}
}
void LCD_init(void)
{
LCD_write_command(0x33);
LCD_write_command(0x0c);
LCD_write_command(0x06);
LCD_write_command(0x01);
delay_ms(4);
}
void LCD_write_command(UCHAR command)
{
P2=command;
delay_ms(1);
PORT_ChangeP70Output(0);
delay_ms(1);
PORT_ChangeP71Output(0,0);
delay_ms(1);
PORT_ChangeP72Output(1);
delay_ms(1);
PORT_ChangeP72Output(0);
delay_ms(4);
}
void LCD_write_data(UCHAR dat)
{
P2=dat;
PORT_ChangeP70Output(1);
delay_ms(1);
PORT_ChangeP71Output(0,0);
delay_ms(1);
PORT_ChangeP72Output(1);
delay_ms(1);
PORT_ChangeP72Output(0);
delay_ms(4);
}
void LCD_disp_char(UCHAR x,UCHAR y,UCHAR dat)
{
UCHAR address;
if(y==1)
address=0x80+x;
else if(y==2)
address=0xc0+x;
LCD_write_command(address);
delay_ms(2);
LCD_write_data(dat);
delay_ms(2);
}
void LCD_disp_string(UCHAR x,UCHAR y,UCHAR *s)
{
UCHAR address;
if(y==1)
address=0x80+x;
else if(y==2)
address=0xc0+x;
LCD_write_command(address);
delay_ms(2);
while(*s)
{
LCD_write_data(*s);
delay_ms(2);
s ++;
}
}
void main(void)
{
/* Start user code. Do not edit comment generated here */
ADPC = _01_ADPC_DI_ON;
LCD_init();
LCD_disp_string(0,1,"Renesas @EEPW");
while (1U)
{
;
}
/* End user code. Do not edit comment generated here */
}
为了进行AD实验,对LCD驱动作了改造,用P5.2-P5.5作为LCD的数据传送端口,以便让出P2用作AD输入。
相关函数如下:
void delay_ms(UINT n)
{
  UINT i;
  for (i=0;i<n;i++)
  {
     TAU0_Channel0_Start();
     do
     {
     }
      while (TimerFlag==0);
      TAU0_Channel0_Stop();
      TimerFlag=0;
  }
}
void LCD_init(void)   //初始化LCD
{
  LCD_write_command(0x28);  //4位数据模式
  LCD_write_command(0x0c);  //显示开
 // LCD_write_command(0x06);
  LCD_write_command(0x01);  //清屏
delay_ms(4);
}
void LCD_en_write(void)   //液晶使能
{
    delay_ms(1);
    PORT_ChangeP71Output(0,0);
    delay_ms(1);
    PORT_ChangeP72Output(1);
    delay_ms(1);
    PORT_ChangeP72Output(0);
    delay_ms(4);
}
void LCD_write_command(UCHAR command) //写指令
{
  UCHAR tmp;
  PORT_ChangeP70Output(0); //RS=0
  delay_ms(1);
  tmp  =command;
  tmp &=0xf0;            //取高4位
  tmp  =tmp>>2;           //右移2位
  P5  &=0xc3;              //清
  P5   =tmp;             //写高4位
  LCD_en_write();
  tmp  =command;
  tmp &=0x0f;            //取高4位
  tmp  =tmp<<2;           //左移2位
  P5  &=0xc3;              //清
  P5   =tmp;             //写低4位
  LCD_en_write(); 
}
void LCD_write_data(UCHAR dat) //写数据
{
  UCHAR tmp;
  PORT_ChangeP70Output(1); //RS=1
  delay_ms(1);
  tmp  =dat;
  tmp &=0xf0;            //取高4位
  tmp  =tmp>>2;           //右移2位
  P5  &=0xc3 ;             //清
  P5   =tmp;             //写高4位
  LCD_en_write();
  tmp  =dat;
  tmp &=0x0f;            //取高4位
  tmp  =tmp<<2;           //左移2位
  P5  &=0xc3;              //清
  P5   =tmp;             //写低4位
  LCD_en_write(); 
}
void LCD_disp_char(UCHAR x,UCHAR y,UCHAR dat) //显示字符
{
UCHAR address;
if(y==1)
address=0x80+x;
else if(y==2)
address=0xc0+x;
LCD_write_command(address);
delay_ms(2);
LCD_write_data(dat);
delay_ms(2);
}
void LCD_disp_string(UCHAR x,UCHAR y,UCHAR *s)//显示字符串
{
   UCHAR address;
   if(y==1)
      address=0x80+x;
   else if(y==2)
      address=0xc0+x;
   LCD_write_command(address);
   delay_ms(3);
   while(*s)
   {
      LCD_write_data(*s);
      delay_ms(3);
      s ++;
   }
}
主函数:
void  main(void)
{
 /* Start user code. Do not edit comment generated here */
       //  ADPC = _01_ADPC_DI_ON;
        LCD_init();
      //  LCD_disp_char(0,1,0x49);
       // LCD_disp_char(1,1,0x20);
      //  LCD_disp_char(2,1,0x4c);
        //LCD_disp_char(3,1,0x4f);
      //  LCD_disp_char(4,1,0x56);
          LCD_disp_string(0,1,"Renesas @EEPW");
          LCD_disp_string(0,2,"Renesas @EEPW");
 while (1U)
 {
  ;
 }
 /* End user code. Do not edit comment generated here */
}
主函数:
void main(void)
{
/* Start user code. Do not edit comment generated here */
ADPC = _01_ADPC_DI_ON;
LCD_init();
AD_ComparatorOn(); /* Enable ADC voltage comparator (ADCE = on) */
AD_Start(); /* Start ADC (ADCS = 0n) */
while (1U)
{
if(ADC_done == MD_TRUE)
{
AD_Stop();
ADC_Result=ADC_Result /15;
ADC_Value=ADC_Result;
ADC_done = MD_CLEAR;
ADC_Value=ADC_Result%10 + 0x30;
LCD_disp_char(5,1,ADC_Value);
ADC_Result=ADC_Result/10;
ADC_Value=ADC_Result%10 + 0x30;
LCD_disp_char(4,1,ADC_Value);
ADC_Result=ADC_Result/10;
ADC_Value=ADC_Result%10 + 0x30;
LCD_disp_char(3,1,ADC_Value);
ADC_Result=ADC_Result/10;
ADC_Value=ADC_Result%10 + 0x30;
LCD_disp_char(2,1,'.');
LCD_disp_char(1,1,ADC_Value);
AD_Start();
}
else
{
NOP();
}
}
/* End user code. Do not edit comment generated here */
}
AD中断函数:
__interrupt void MD_INTAD(void)
{
/* Start user code. Do not edit comment generated here */
ADC_Result=ADCR;
// ADC_Result=ADC_Result>>5;
ADC_done = MD_SET;
/* End user code. Do not edit comment generated here */
}
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