CH455数码管的单片机驱动程序

ID:430347 · 发表于 2018-11-21 09:10

unsigned char CH450_buf2[6];                //定义6个数码管的数据映象缓存区
//const unsigned char BCD_decode_tab[0x10] = { 0X3F, 0X06, 0X5B, 0X4F, 0X66, 0X6D, 0X7D, 0X07, 0X7F, 0X6F, 0X77, 0X7C, 0X58, 0X5E, 0X79, 0X71 };

void CH455_Init(void)
{
         unsigned char i;
      GPIO_InitTypeDef GPIO_InitStructure;
      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB                                                                                                                      //管脚时钟PB
                                                                                                               ,ENABLE);//管脚时钟PB       //使能GPIOB时钟


      //stm32f103中PB3、PB4、PA15为JTAG引脚，若要作为普通IO口来使用的话，要禁用JTAG功能。
//       RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//       GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;//GPIO_Pin_6--SCL  GPIO_Pin_7--SDA
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT ; //输出
      GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;//推挽输出  开漏输出
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOB, &GPIO_InitStructure);
      GPIO_SetBits(GPIOB,GPIO_Pin_6|GPIO_Pin_7);
      DelayUs(1000);

      CH450_buf_write(CH455_SYSOFF);       // 关闭休眠
      CH450_buf_write(CH455_7SEG_ON);       // 开启数码管
      CH450_buf_write(CH455_SYSON_8);       // 开启亮度
      CH450_buf_write(CH455_SYSON1);       // 开启显示
            for( i=0; i<4; i++ ) CH450_buf_index( i, 0x00 );  // 清空

//       CH455_Write( CH455_SYSON_8 );             //八段式
}

/*
* 函数功能：IIC产生起始信号函数
* 输入参数：无
* 输出参数：无
*/
void CH455_I2c_Start(void)
{
CH455_SDA_D_OUT();
CH455_SCL_H; //SCL = high;
DelayUs(I2C_DELAY);
CH455_SDA_H ; //SDA = high;
DelayUs(I2C_DELAY);
CH455_SDA_L ; //SDA = low;
DelayUs(I2C_DELAY);
CH455_SCL_L; //SCL = low;
DelayUs(I2C_DELAY);
}

/*
* 函数功能：IIC产生停止信号
* 输入参数：无
* 输出参数：无
*/
void CH455_I2c_Stop(void)
{
CH455_SDA_D_OUT();
CH455_SCL_L;;    //SCL = low;
DelayUs(I2C_DELAY);
CH455_SDA_L;    //SDA = low;
DelayUs(I2C_DELAY);
CH455_SCL_H; //SCL = high;
DelayUs(I2C_DELAY);
CH455_SDA_H;; //SDA = high;
DelayUs(I2C_DELAY);
}

/*
* 函数功能：IIC发送一个字节
* 输入参数：一个字节
* 输出参数：无
*/
void CH455_I2c_WrByte(unsigned char IIC_Byte)
{
unsigned char i;
CH455_SDA_D_OUT();
for(i = 0; i < 8; i++)
{
      if(IIC_Byte & 0x80)
         CH455_SDA_H; //SDA=high;
      else
         CH455_SDA_L; //SDA=low;
      DelayUs(I2C_DELAY);
      CH455_SCL_H;    //SCL=high;
      DelayUs(I2C_DELAY);
      CH455_SCL_L;    //SCL=low;
      DelayUs(I2C_DELAY);
      IIC_Byte<<=1;
}
DelayUs(I2C_DELAY);
CH455_SDA_H;       //SDA=1;
DelayUs(I2C_DELAY);
CH455_SCL_H;       //SCL=1;
DelayUs(I2C_DELAY);
CH455_SCL_L;          //SCL=0;
DelayUs(I2C_DELAY);
}

unsigned char  CH455_I2c_RdByte( void )             //读一个字节数据
{
unsigned char i, bytedata;
CH455_SDA_D_IN();    //将数据设置为输入模式
DelayUs(I2C_DELAY);
   CH455_SDA_H;    //数据线拉高
DelayUs(I2C_DELAY);
   CH455_SCL_L;
DelayUs(I2C_DELAY);
for(i = 0; i < 8; i++)    //读8位数据
{
      CH455_SCL_H;
      DelayUs(I2C_DELAY);
      bytedata <<= 1;
      DelayUs(I2C_DELAY);
      bytedata |= (CH455_SDA_IN);
      DelayUs(I2C_DELAY);
      CH455_SCL_L;
      DelayUs(I2C_DELAY);
}
CH455_SDA_D_OUT();          //数据线设置回输出模式
CH455_SDA_H;       //SDA=1;
DelayUs(I2C_DELAY);
CH455_SCL_H;       //SCL=1;
DelayUs(I2C_DELAY);
CH455_SCL_L;          //SCL=0;
DelayUs(I2C_DELAY);
return(bytedata);//返回数据
}

void CH455_Write( UINT16 cmd )       //写命令
{
      CH455_I2c_Start();             //启动总线
         CH455_I2c_WrByte(((UINT8)(cmd>>7)&CH455_I2C_MASK)|CH455_I2C_ADDR);
         CH455_I2c_WrByte((UINT8)cmd);    //发送数据
      CH455_I2c_Stop();                //结束总线
}

UINT8 CH455_Read( void )             //读取按键
{
      UINT8 keycode;
         CH455_I2c_Start();             //启动总线
         CH455_I2c_WrByte((UINT8)(CH455_GET_KEY>>7)&CH455_I2C_MASK|0x01|CH455_I2C_ADDR);
         keycode=CH455_I2c_RdByte();    //读取数据
      CH455_I2c_Stop();             //结束总线
      return keycode;
}
/*********************************************/
void       CH450_buf_write( unsigned short cmd )  // 向CH450输出数据或者操作命令,自动建立数据映象
{
      if ( cmd & 0x1000 ) { // 加载数据的命令,需要备份数据到映象缓冲区
            CH450_buf2[ (unsigned char)( ( cmd >> 8 ) - 2 ) & 0x07 ] = (unsigned char)( cmd & 0xFF );       // 备份数据到相应的映象单元
      }
      CH455_Write( cmd );       // 发出
}

void       CH450_buf_index( unsigned char index, unsigned char dat )  // 向CH450指定的数码管输出数据,自动建立数据映象
// index 为数码管序号,有效值为0到5,分别对应DIG2到DIG7
{
      unsigned short cmd;
      CH450_buf2[ index ] = dat;       // 备份数据到相应的映象单元
//       cmd = ( CH455_DIG2 + ( (unsigned short)index << 8 ) ) | dat ;       // 生成操作命令
      cmd = ( CH455_DIG0 + ( (unsigned short)index << 8 ) ) | dat ;       // 生成操作命令
      CH455_Write( cmd );       // 发出
}

void CH450_set_bit(unsigned char bit_addr)    //段位点亮
{
      unsigned char byte_addr;
      byte_addr=(bit_addr&0x38)>>3;
      if ( byte_addr < 6 ) CH450_buf_index( byte_addr, CH450_buf2[byte_addr] | (1<<(bit_addr&0x07)) );
}

void CH450_clr_bit(unsigned char bit_addr)    //段位熄灭
{
      unsigned char byte_addr;
      byte_addr=(bit_addr&0x38)>>3;
      if ( byte_addr < 6 ) CH450_buf_index( byte_addr, CH450_buf2[byte_addr] & ~(1<<(bit_addr&0x07)) );
}

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