欧美极品高清xxxxhd,国产日产欧美最新,无码AV国产东京热AV无码,国产精品人与动性XXX,国产传媒亚洲综合一区二区,四库影院永久国产精品,毛片免费免费高清视频,福利所导航夜趣136

標題: Si4438如何拿到PART_INFO里的信息？附STM32單片機程序 [打印本頁]

作者: my854412644 時間: 2020-2-13 15:12
標題: Si4438如何拿到PART_INFO里的信息？附STM32單片機程序
我用STM32F0xx通過SPI通信連接Si4438.
SPI已經配置好了，發送PART_INFO指令到Si4438，但是返回的數據不對。請各位大神指導下，謝謝。

************Si4438函數****************************

void Si44xx_Wait_Cts(u8 cnt)
{
      u8 l_ReadCtsTimes = 0;
      SPI_CS_LOW();
      while(1)
      {
                     delay_us(2);
                     SPI_ExchangeByte( READ_CMD_BUFF );
                     if( SPI_ExchangeByte(0xFF)==0xFF )
                     {
                                    break;
                     }else if( cnt<l_ReadCtsTimes++ )
                     {
                                    break;
                     }
      }
      SPI_CS_HIGH();
}
void Si44xx_Write_Cmds( u8 *cmd, u8 len )
{
      Si44xx_Wait_Cts(2);
      SPI_CS_LOW();
      delay_us(2);
      while(len--)
      {
            SPI_ExchangeByte( *cmd );
            cmd++;
      }
      SPI_CS_HIGH();
      Si44xx_Wait_Cts(50);
}
void Si44xx_Read_Response( u8 *pRead, u8 Length )
{
      SPI_CS_LOW();
      delay_us(2);
      SPI_ExchangeByte( READ_CMD_BUFF );
      while( Length-- )
      {
                     *pRead = SPI_ExchangeByte( 0xFF );
                     pRead++;
      }
      SPI_CS_HIGH();
}

uint8_t Si44xx_Get_Device_Status( void )
{
      SI44xxCmd[0] = REQUEST_DEVICE_STATE;
      SI44xxCmd[1] = 0x00;
      SI44xxCmd[2] = 0x00;
      Si44xx_Write_Cmds( SI44xxCmd, 1 );
      Si44xx_Read_Response( SI44xxCmd, 3 );
      return (SI44xxCmd[1]&0x0F);
}

void SI446X_PART_INFO( u8 *buffer )
{
            u8 cmd = PART_INFO;
Si44xx_Write_Cmds( &cmd, 1 );
Si44xx_Read_Response( buffer, 8 );

}

**********************************************
**************SPI*****************************

uint8_t SPI_ExchangeByte( uint8_t TxByte )
{
      uint8_t l_Data = 0;
      uint16_t l_WaitTime = 0;

      while( RESET == SPI_I2S_GetFlagStatus( SPI1, SPI_I2S_FLAG_TXE ) )             //等待發送緩沖區為空
      {
            if( SPI_WAIT_TIMEOUT == ++l_WaitTime )
            {
                     break;                      //如果等待超時則退出
            }
      }
      l_WaitTime = SPI_WAIT_TIMEOUT / 2;             //重新設置接收等待時間(因為SPI的速度很快，正常情況下在發送完成之后會立即收到數據，等待時間不需要過長)
      SPI1->DR = TxByte;       //發送數據

      while( RESET == SPI_I2S_GetFlagStatus( SPI1, SPI_I2S_FLAG_RXNE ) )             //等待接收緩沖區非空
      {
            if( SPI_WAIT_TIMEOUT == ++l_WaitTime )
            {
                     break;                      //如果等待超時則退出
            }
      }

      l_Data = (uint8_t)SPI1->DR;             //讀取接收數據

      return l_Data;             //返回
}

*******************************************************************

作者: my854412644 時間: 2020-2-13 15:44
使用外部MCU控制Si4438無線收發器時，發現MCU讀取Si4438的芯片信息的值全是0xFF

歡迎光臨 (http://www.raoushi.com/bbs/)