STM32驱动MAX7221需要不停初始化MAX7221吗？？

zhouliyu

stm32驱动MAX7221 为什么要不停的初始化MAX7221寄存器才能显示呢

void int_max7221(void)
  {  
   Write(0Xf9,0X0f);//???????????·0x00??????????0x0ff??????

   Write(0XfA,0X09); //???????·

   Write(0XfB,0X03);//?¨?è??????????

   Write(0XfC,0X01);//?¤×÷????

   Write(0Xff,0X00);//????????
  }
 
 void Write(u8 Addr,u8 Dat)
  {
   u8 i;
    CS7221_0();
   for(i=0;i<8;i++)
    { 
     CLK_0();
     DIN=((Addr>>7)&0x1); 
     CLK_1();
     Addr<<=1;

    }
   for(i=0;i<8;i++)
    {  
     CLK_0();

     DIN=((Dat>>7)&0x1); 
     CLK_1();
     Dat<<=1;

    }
    CS7221_1();
    
  }

正点原子

帮顶....

zhouliyu

自己也顶一下

zhouliyu

回复【3楼】zhouliyu:
---------------------------------
主函数int main(void)
{
   u8 i;  
 Int_MAX7221();
int_max7221A();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//?è????????????????·?×é2
delay_init(); //???±??????????   
LED_Init();    //????????LED??????????????
KEY_Init(); //KEY??????
AT24CXX_Init(); //IIC?????? 
uart_init(9600); //???????????¨??????115200
TLC5615_Init(); //TLC5615??????
//fat(1023);
//temp=AT24CXX_ReadOneByte(0);
temp=AT24CXX_ReadLenByte(0,2);
  fat(temp);
printf("????EEPROM:%d\n",temp);

  int_max7221A();

while(1)
{ 
      int_max7221A(); //不停的初始化MAX7221A
Write(0X01,Disp_Buffer1);
Write(0X02,Disp_Buffer1[4]);
Write(0X03,Disp_Buffer1[9]);
Write(0X04,Disp_Buffer1[4]);