请问stm32的spi驱动595怎么不对啊。每次要复位一次数据才改变一下。

zhouyou

#include <stm32f10x.h>
#include "delay.h"
void RCC_Configuration(void);

unsigned char table[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};
//*******************SPI??????***************************//
void SPI_initial()
{
 SPI_InitTypeDef SPI_InitStructure; //?¨??SPI?á????
 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //?è?????????¤?¨??
 SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //???÷????
 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b ; //????????°???
 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //?±???????±???×
 SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //?????????±????????????
 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //?????????í??????
 SPI_InitStructure.SPI_BaudRatePrescaler =
 SPI_BaudRatePrescaler_256;
 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;//???????°·???
 SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC???????é????7??
 SPI_Init(SPI1, &SPI_InitStructure);//??????SPI???á????
 SPI_SSOutputCmd(SPI1, ENABLE);
 SPI_NSSInternalSoftwareConfig(SPI1,SPI_NSSInternalSoft_Set);
 SPI_Cmd(SPI1, ENABLE); //????SPI?¨??
 

}
void GPIO_initial()
{
     
   GPIO_InitTypeDef GPIO_InitStructure;
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5| GPIO_Pin_6| GPIO_Pin_7;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode =  GPIO_Mode_AF_PP ;
   GPIO_Init(GPIOA, &GPIO_InitStructure);
 
   GPIO_InitStructure.GPIO_Pin =GPIO_Pin_4;
   GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOA, &GPIO_InitStructure);
 
}
void write_date(u8 date)
{
      if(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE )==RESET)
       SPI_I2S_SendData(SPI1, date);
  
   

} 
int main()
{
     u8 i;
     RCC_Configuration();
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO| RCC_APB2Periph_SPI1, ENABLE);
    
    delay_init(72);
     GPIO_initial();
     SPI_initial();
     SPI_NSSInternalSoftwareConfig(SPI1, SPI_NSSInternalSoft_Set);
     
     while(1)
   {
    for(i=0;i<10;i++)
    {
     write_date(table);
    
    //delay_ms(500);
    }
   }
 
}