原创 用 STM32 来驱动ZLG7289（多键盘数码管驱动芯片）

利用STM32来驱动ZLG7289（最多驱动8位数码管，64个独立键盘），驱动代码如下：

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

硬件连接：

PB12-> INT（浮空输入）, PB13-> CS（出）,PB14-> CLK（出）, PB15-> DAT（出+输入浮空）

STM32端口配置：

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_13 | GPIO_Pin_14| GPIO_Pin_15 ;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 ;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

ZLG7289驱动：

//**************** 7289读写相关操作 （SPI通信程序驱动程序）*******************

void short_delay(void)             //确定SPI读写函数中数据延时，不得轻易更改

{

       u8 i;

       for (i=0;i<250;i++);

}

void send_byte( u8 out_byte)

{

       u8 i;

       GPIO_ResetBits(GPIOB, GPIO_Pin_13);  //7289失能cs=0

       for (i=0;i<8;i++)

       {

              if (out_byte&0x80)

              {

                     GPIO_SetBits(GPIOB, GPIO_Pin_15);     // dat="1";

              }

              else

              {

                     GPIO_ResetBits(GPIOB, GPIO_Pin_15);      //dat=0;

              }

                  GPIO_SetBits(GPIOB, GPIO_Pin_14);        // clk="1";

              short_delay();

                  GPIO_ResetBits(GPIOB, GPIO_Pin_14);      //clk=0;

              short_delay();

              out_byte=out_byte*2;    //实现左移

       }

       GPIO_ResetBits(GPIOB, GPIO_Pin_15);      //dat=0;

}

void write7279(u8 cmd, u8 dta)

{

       send_byte (cmd);

       send_byte (dta);

    GPIO_SetBits(GPIOB, GPIO_Pin_13); 

}

u8 read7279(u8 command)

{

    u8 temp;

       send_byte(command);

    temp = receive_byte();

    GPIO_SetBits(GPIOB, GPIO_Pin_13);  //细分器失能cs=1

       return(temp);

}

u8 receive_byte(void)

{

       u8 i,j, in_byte;

       GPIO_SetBits(GPIOB, GPIO_Pin_15);     // dat="1";

       short_delay();

       for (i=0;i<8;i++)

       {

               GPIO_SetBits(GPIOB, GPIO_Pin_14);        // clk="1";

              short_delay();

              in_byte=in_byte*2;

                j= GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_15);

              if (j)

              {

                     in_byte=in_byte|0x01;

              }

              GPIO_ResetBits(GPIOB, GPIO_Pin_14);      //clk=0;

              short_delay();

       }

       GPIO_ResetBits(GPIOB, GPIO_Pin_15);      //dat=0;

       return (in_byte);

}

//********************** 7289驱动数码管程序（这些和具体项目相关）***********//

void DisplayData(u16 disData)             //最多显示5位数，取消高位零显示

{

       Bit flag = ZERO;

       u8 temp;

        //第4位显示

       temp = disData/10000;

       if(temp!=0)

       {

              flag = ONE;

       }

       if(flag != 0)

       {

              write7279(DECODE0+4,temp);   //+4使指令码后三位加4，实现数码管位选

       }

       else

       {

              write7279(DECODE0+4,0x<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />0f);      //无显示

       }

         //第3位显示

       temp = disData/1000%10;

       if(temp!=0)

       {

              flag = ONE;

       }

       if(flag != 0)

       {

              write7279(DECODE0+3,temp);

       }

       else

       {

              write7279(DECODE0+3,0x0f);

       }

         //第2位显示

       temp = disData/100%10;

       if(temp!=0)

       {

              flag = ONE;

       }

       if(flag != 0)

       {

              write7279(DECODE0+2,temp);

       }

       else

       {

              write7279(DECODE0+2,0x0f);

       }

         //第1位显示

       temp = disData/10%10;

       if(temp!=0)

       {

              flag = ONE;

       }

       if(flag != 0)

       {

              write7279(DECODE0+1,temp);

       }

       else

       {

              write7279(DECODE0+1,0x0f);

       }

         //第0位显示

       temp = disData%10;

       write7279(DECODE0,temp);

}

void DisplayDirection(DIRECTION dir)                                   //显示方向

{

       if(dir == RIGHT)                               //显示"BAC"

       {

              write7279(DECODE0+4,0x0f);               //无显示(清除该位数值)

              write7279(DECODE0+3,0x0f);               //无显示(清除该位数值)

              write7279(DECODE1+2,0x0b);              //显B

              write7279(DECODE1+1,0x0a);              //显A

              write7279(DECODE1,0x0c);                //显C

       }

       else                                            //显示"FOR"

       {

              write7279(DECODE0+4,0x0f);               //

              write7279(DECODE0+3,0x0f);

              write7279(DECODE1+2,0x0f);

              write7279(DECODE1+1,0x00);

              write7279(DECODE1,0x0a);

       }

}

void display_common(void)                //状体标示图形显示

    {

      write7279(UNDECODE+7,0x4e);              

      write7279(UNDECODE+6,0x48);

      write7279(UNDECODE+5,0xf8);

    }

void display_steps(void)

    {

      write7279(UNDECODE+7,0x77);             

      write7279(UNDECODE+6,0x77);

      write7279(UNDECODE+5,0xf7);

    }

void display_direction(void)

    {

      write7279(UNDECODE+7,0x1f);             

      write7279(UNDECODE+6,0x1f);

      write7279(UNDECODE+5,0x9f);

    }

void display_position(void)

    {

      write7279(UNDECODE+7,0x3d);             

      write7279(UNDECODE+6,0x3d);

      write7279(UNDECODE+5,0xbd);

    }

void display_subdivision(void)

    {

      write7279(UNDECODE+7,0x4e);             

      write7279(UNDECODE+6,0x4e);

      write7279(UNDECODE+5,0xce);

    }