点阵显示问题

只看该作者 · 2013-9-22 11:58

本帖最后由 dingsujie 于 2013-9-22 12:05 编辑

/***************************** SPI初始化  ************************************/
void SPI_74HC595_Init(void)
{  GPIO_Init(GPIOE, SPI_CS, GPIO_MODE_OUT_PP_HIGH_FAST);
SPI_DeInit();
SPI_74HC595_CS_HIGH();//不使能从设备
SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_32,SPI_MODE_MASTER,\
               SPI_CLOCKPOLARITY_HIGH,SPI_CLOCKPHASE_2EDGE,\
               SPI_DATADIRECTION_2LINES_FULLDUPLEX, SPI_NSS_SOFT, 0x07);
SPI_Cmd(ENABLE);/* 使能SPI */

}
/***************************** SPI_74HC595_SendByte  ************************************/
void SPI_74HC595_SendByte(uchar HC595Data1)
{
  SPI_74HC595_CS_LOW();
/* Loop while DR register in not emplty */
  while (SPI_GetFlagStatus( SPI_FLAG_TXE) == RESET);
  /* Send byte through the SPI1 peripheral */
  SPI_SendData(HC595Data1);
  SPI_74HC595_CS_HIGH();

}
/*********************************  显示函数  *****************************************************/
void Display(void)
{ uchar i=0;
GPIO_Write(GPIOB, 0xFF);
   for(i=0;i<3;i++)
      {
      SPI_74HC595_SendByte(Disbuff);
      delay_d(12);

      }
}
/*********************************  数字更新显示函数  *****************************************************/
void RefreshDisbuff(void)
{
  uint i=0,j=0,temp=0;
for(i=0;i<5;i++)
{
   Disbuff[1]=NUM[1*5+i];
   // Disbuff[1]=0xff;
   //Disbuff[2]=0x00;
      Disbuff[0]=NUM[0*5+i];
      Disbuff[2]=NUM[1*5+i];
   Display();
   switch(i)
      {
      case 0:GPIO_Write(GPIOB, 0xFD);break;
      case 1:GPIO_Write(GPIOB, 0xFB);break;
      case 2:GPIO_Write(GPIOB, 0xF7);break;
      case 3:GPIO_Write(GPIOB, 0xEF);break;
      case 4:GPIO_Write(GPIOB, 0xDF);break;
      default:{;}
      }
   delay_d(500);
}
file:///C:/Documents%20and%20Settings/Administrator/Application%20Data/Tencent/Users/1072989515/QQ/WinTemp/RichOle/%25(Z73Z4O%25N%7D3]6P(9XQ56%7B7.jpg

STM8采用SPI模式驱动74HC595出现乱码，具体情况为显示错位，请大侠帮忙分析