TMS320F28069M: 接收FIFO的使用问题

  HAL_Obj *obj = (HAL_Obj *)handle;
  SCI_setCharLength(obj->sciAHandle,SCI_CharLength_8_Bits);     //SCICCR SCICHAR bit2:0=111 8bit数据传输
  SCI_setMode(obj->sciAHandle,SCI_Mode_IdleLine);               //SCICCR ADDRIDLE_MODE bit3=0 选择空闲线协议
  SCI_disableLoopBack(obj->sciAHandle);                         //SCICCR LOOPBKENA  bit4=0 自测模式关闭 官方例程是使能loop back
  SCI_disableParity(obj->sciAHandle);                           //SCICCR PARITYENA bit5=0 不允许奇偶校验
  SCI_setParity(obj->sciAHandle,SCI_Parity_Odd);                //SCICCR PARITY bit6=0 奇校验
  SCI_setNumStopBits(obj->sciAHandle,SCI_NumStopBits_One);      //SCICCR STOPBITS bit7=0 1bit停止位

  SCI_disableRxErrorInt(obj->sciAHandle);                       //SCICTL1 RXERRINTENA bit6=0 屏蔽接收错误中断
  SCI_enable(obj->sciAHandle);                                  //SCICTL1 SWRESET bit5=1 SCI软件不复位
  SCI_disableTxWake(obj->sciAHandle);                           //SCICTL1 TXWAKE bit3=0 sci发送不唤醒
  SCI_disableSleep(obj->sciAHandle);                            //SCICTL1 SLEEP bit2=0 禁用睡眠功能
  SCI_enableRx(obj->sciAHandle);                                //SCICTL1 RXENA bit0=1 SCI接收使能
  SCI_enableTx(obj->sciAHandle);                                //SCICTL1 TXENA bit1=1 SCI发送使能

  SCI_disableTxInt(obj->sciAHandle);                            //SCICTL2 bit0=0 禁止TXRDY中断

#if defined(SCI_RxFifoIntEnable)
  SCI_disableRxInt(obj->sciAHandle);                            //SCICTL2 RXBKINTENA bit1=1 禁用 接收/缓冲抑制中断
#else
  SCI_enableRxInt(obj->sciAHandle);                             //SCICTL2 RXBKINTENA bit1=0 使能 接收/缓冲抑制中断
#endif

  obj->sciAHandle->SCIFFTX &=(~(1<<15));                        //SCIFFTX SCIRST bit15=0 复位SCI发送接收通道
#if defined(SCI_RxFifoIntEnable)
  SCI_enableTxFifoEnh(obj->sciAHandle);                         //SCIFFTX SCIFFENA bit14=1 启用FIFO
  SCI_enableTxFifo(obj->sciAHandle);                            //SCIFFTX TXFIFORESET bit13=1 使能发送FIFO
#else
  SCI_disableTxFifoEnh(obj->sciAHandle);                        //SCIFFTX SCIFFENA bit14=0 禁用FIFO
  obj->sciAHandle->SCIFFTX &=(~(1<<13));                        //SCIFFTX TXFIFORESET bit13=0 持续复位发送FIFO
#endif

  SCI_clearTxFifoInt(obj->sciAHandle);                          //SCIFFTX TXFFINTCLR bit6=1  发送FIFO中断清除标志位，1=清除TXFFINT位
  SCI_disableTxFifoInt(obj->sciAHandle);                        //SCIFFTX TXFFIENA bit5=0  不使能发送fifo中断
  SCI_setTxFifoIntLevel(obj->sciAHandle,SCI_FifoLevel_Empty);   //SCIFFTX TXFFIL bit4:0=00000 发送FIFO深度设为0 最大为4

  SCI_clearRxFifoOvf(obj->sciAHandle);                          //SCIFFRX RXFFOVRCLR bit14=1 SCI接收FIFO溢出清除标志位，1，清除RXFFOVF
#if defined(SCI_RxFifoIntEnable)
  SCI_enableRxFifo(obj->sciAHandle);                            //SCIFFRX RXFIFORESET bit13=1 重新使能接收FIFO
#else
  obj->sciAHandle->SCIFFRX &=(~(1<<13));                        //SCIFFRX RXFIFORESET bit13=0 持续复位接收FIFO
#endif
  SCI_clearRxFifoInt(obj->sciAHandle);                          //SCIFFRX RXFFINTCLR bit6=1  清除接收FIFO中断标志位

#if defined(SCI_RxFifoIntEnable)
  SCI_enableRxFifoInt(obj->sciAHandle);                         //SCIFFRX RXFFIENA bit5=1  使能接收FIFO中断
  SCI_setRxFifoIntLevel(obj->sciAHandle,SCI_FifoLevel_4_Words); //SCIFFRX bit4:0=00000 接收深度最大设置为4
#else
  SCI_disableRxFifoInt(obj->sciAHandle);                        //SCIFFRX RXFFIENA bit5=0  接收FIFO中断不使能
  SCI_setRxFifoIntLevel(obj->sciAHandle,SCI_FifoLevel_Empty);   //SCIFFRX bit4:0=00000 接收深度最大设置为0
#endif


  obj->sciAHandle->SCIFFCT &=(~(1<<15));                        //SCIFFCT ABD bit15=0
  SCI_clearAutoBaudDetect(obj->sciAHandle);                     //SCIFFCT ABDCLR bit14=1 ABD标志位
  SCI_disableAutoBaudAlign(obj->sciAHandle);                    //SCIFFCT CDC bit13=0 禁用ABD对齐
  SCI_setTxDelay(obj->sciAHandle,0);                            //SCIFFCT FTXDLY bit7:0=0

  SCI_setBaudRate(obj->sciAHandle,SCI_BaudRate_115_2_kBaud);

  SCI_enable(obj->sciAHandle);                                  //SCICTL1 SWRESET bit5=1 SCI软件使能
  SCI_enableChannels(obj->sciAHandle);                          //SCIFFTX SCIRST bit15=1 SCI复位标志，SCI接收和发送FIFO功能继续工作

  return;
}

这个SCI配置兼顾了使用FIFO和不使用FIFO的实践

接收都是使用中断方式，发送都是轮询方式

SCI_RxFifoIntEnable是是否使用FIFO的一个条件宏，供大家参考