TI中文支持网各位，在调试28335 SCI发送时发现以下问题，看看有没有解决的办法，先描述下问题
使用查询方式发送，比如我要发送 0x01 0x02 0x03 三个数据，执行完ScibRegs。SCITXBUF = SendBuf[i]&0xFF;后只发送0x01 0x02,执行完第二次发送0x03 0x01 0x02,是什么原因第一次不直接发送三个数据？
代码如下“
#define SCI ScibRegs
初始化：
SCI.SCIFFTX.all=0xE040;
//ScibRegs.SCIFFCT.bit.FFTXDLY = 8;
SCI.SCIFFRX.all=0x206F;
SCI.SCIFFRX.bit.RXFFIL = 5; //in protocal. num of needing to recieved is 9
//SCI FIFO Control Register
SCI.SCIFFCT.all=0x0;
//SCI Communication Control Register
SCI.SCICCR.all =0x0007; // 1 stop bit, No loopback
//No parity,8 char bits,
// async mode, idle-line protocol
//SCI Control Register 1
SCI.SCICTL1.all = 0x0003; //enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
//SCI Control Register 2
SCI.SCICTL2.bit.TXINTENA = 0;
SCI.SCICTL2.bit.RXBKINTENA = 1; //enable rx interrupt
//Baud=LPSCLK/((BRR+1)x8) ->BRR= (LPSCLK/(Baud x 8))-1 (1<=BRR<= 65535)
//Baud=LPSCLK/16 -> BRR = 0
BaudRate = SCI_PRD;
BaudRate = (BaudRate >> 8);
SCI.SCIHBAUD = BaudRate; // 115200 baud @LSPCLK = 37.5MHz.
BaudRate = SCI_PRD;
BaudRate = (BaudRate & 0x00FF);
SCI.SCILBAUD = BaudRate;
SCI.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
SCI.SCIFFTX.bit.TXFIFOXRESET = 1; SCI.SCIFFRX.bit.RXFIFORESET = 1;
发送：
for(i=0;i<3;i++)
{
while (SCI.SCICTL2.bit.TXRDY != 1) ;
SCI.SCITXBUF = SendBuf[i]&0xFF;
}
mangui zhang：改为如下呢：SCI.SCITXBUF = SendBuf[i]&0xFF;
while (SCI.SCICTL2.bit.TXRDY != 1) ;
各位，在调试28335 SCI发送时发现以下问题，看看有没有解决的办法，先描述下问题
使用查询方式发送，比如我要发送 0x01 0x02 0x03 三个数据，执行完ScibRegs。SCITXBUF = SendBuf[i]&0xFF;后只发送0x01 0x02,执行完第二次发送0x03 0x01 0x02,是什么原因第一次不直接发送三个数据？
代码如下“
#define SCI ScibRegs
初始化：
SCI.SCIFFTX.all=0xE040;
//ScibRegs.SCIFFCT.bit.FFTXDLY = 8;
SCI.SCIFFRX.all=0x206F;
SCI.SCIFFRX.bit.RXFFIL = 5; //in protocal. num of needing to recieved is 9
//SCI FIFO Control Register
SCI.SCIFFCT.all=0x0;
//SCI Communication Control Register
SCI.SCICCR.all =0x0007; // 1 stop bit, No loopback
//No parity,8 char bits,
// async mode, idle-line protocol
//SCI Control Register 1
SCI.SCICTL1.all = 0x0003; //enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
//SCI Control Register 2
SCI.SCICTL2.bit.TXINTENA = 0;
SCI.SCICTL2.bit.RXBKINTENA = 1; //enable rx interrupt
//Baud=LPSCLK/((BRR+1)x8) ->BRR= (LPSCLK/(Baud x 8))-1 (1<=BRR<= 65535)
//Baud=LPSCLK/16 -> BRR = 0
BaudRate = SCI_PRD;
BaudRate = (BaudRate >> 8);
SCI.SCIHBAUD = BaudRate; // 115200 baud @LSPCLK = 37.5MHz.
BaudRate = SCI_PRD;
BaudRate = (BaudRate & 0x00FF);
SCI.SCILBAUD = BaudRate;
SCI.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
SCI.SCIFFTX.bit.TXFIFOXRESET = 1; SCI.SCIFFRX.bit.RXFIFORESET = 1;
发送：
for(i=0;i<3;i++)
{
while (SCI.SCICTL2.bit.TXRDY != 1) ;
SCI.SCITXBUF = SendBuf[i]&0xFF;
}
user1775662：
问题解决了吗，好像跟我的问题一样。
你用的是RS485还是RS232？
各位，在调试28335 SCI发送时发现以下问题，看看有没有解决的办法，先描述下问题
使用查询方式发送，比如我要发送 0x01 0x02 0x03 三个数据，执行完ScibRegs。SCITXBUF = SendBuf[i]&0xFF;后只发送0x01 0x02,执行完第二次发送0x03 0x01 0x02,是什么原因第一次不直接发送三个数据？
代码如下“
#define SCI ScibRegs
初始化：
SCI.SCIFFTX.all=0xE040;
//ScibRegs.SCIFFCT.bit.FFTXDLY = 8;
SCI.SCIFFRX.all=0x206F;
SCI.SCIFFRX.bit.RXFFIL = 5; //in protocal. num of needing to recieved is 9
//SCI FIFO Control Register
SCI.SCIFFCT.all=0x0;
//SCI Communication Control Register
SCI.SCICCR.all =0x0007; // 1 stop bit, No loopback
//No parity,8 char bits,
// async mode, idle-line protocol
//SCI Control Register 1
SCI.SCICTL1.all = 0x0003; //enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
//SCI Control Register 2
SCI.SCICTL2.bit.TXINTENA = 0;
SCI.SCICTL2.bit.RXBKINTENA = 1; //enable rx interrupt
//Baud=LPSCLK/((BRR+1)x8) ->BRR= (LPSCLK/(Baud x 8))-1 (1<=BRR<= 65535)
//Baud=LPSCLK/16 -> BRR = 0
BaudRate = SCI_PRD;
BaudRate = (BaudRate >> 8);
SCI.SCIHBAUD = BaudRate; // 115200 baud @LSPCLK = 37.5MHz.
BaudRate = SCI_PRD;
BaudRate = (BaudRate & 0x00FF);
SCI.SCILBAUD = BaudRate;
SCI.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
SCI.SCIFFTX.bit.TXFIFOXRESET = 1; SCI.SCIFFRX.bit.RXFIFORESET = 1;
发送：
for(i=0;i<3;i++)
{
while (SCI.SCICTL2.bit.TXRDY != 1) ;
SCI.SCITXBUF = SendBuf[i]&0xFF;
}
Seven Han：
使用fifo的话，把while (SCI.SCICTL2.bit.TXRDY != 1) ;修改为while (SCI.SCIFFTX.bit.TXFFST != 0){}。
各位，在调试28335 SCI发送时发现以下问题，看看有没有解决的办法，先描述下问题
使用查询方式发送，比如我要发送 0x01 0x02 0x03 三个数据，执行完ScibRegs。SCITXBUF = SendBuf[i]&0xFF;后只发送0x01 0x02,执行完第二次发送0x03 0x01 0x02,是什么原因第一次不直接发送三个数据？
代码如下“
#define SCI ScibRegs
初始化：
SCI.SCIFFTX.all=0xE040;
//ScibRegs.SCIFFCT.bit.FFTXDLY = 8;
SCI.SCIFFRX.all=0x206F;
SCI.SCIFFRX.bit.RXFFIL = 5; //in protocal. num of needing to recieved is 9
//SCI FIFO Control Register
SCI.SCIFFCT.all=0x0;
//SCI Communication Control Register
SCI.SCICCR.all =0x0007; // 1 stop bit, No loopback
//No parity,8 char bits,
// async mode, idle-line protocol
//SCI Control Register 1
SCI.SCICTL1.all = 0x0003; //enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
//SCI Control Register 2
SCI.SCICTL2.bit.TXINTENA = 0;
SCI.SCICTL2.bit.RXBKINTENA = 1; //enable rx interrupt
//Baud=LPSCLK/((BRR+1)x8) ->BRR= (LPSCLK/(Baud x 8))-1 (1<=BRR<= 65535)
//Baud=LPSCLK/16 -> BRR = 0
BaudRate = SCI_PRD;
BaudRate = (BaudRate >> 8);
SCI.SCIHBAUD = BaudRate; // 115200 baud @LSPCLK = 37.5MHz.
BaudRate = SCI_PRD;
BaudRate = (BaudRate & 0x00FF);
SCI.SCILBAUD = BaudRate;
SCI.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
SCI.SCIFFTX.bit.TXFIFOXRESET = 1; SCI.SCIFFRX.bit.RXFIFORESET = 1;
发送：
for(i=0;i<3;i++)
{
while (SCI.SCICTL2.bit.TXRDY != 1) ;
SCI.SCITXBUF = SendBuf[i]&0xFF;
}
tecman chen：
回复 user1775662:
232
各位，在调试28335 SCI发送时发现以下问题，看看有没有解决的办法，先描述下问题
使用查询方式发送，比如我要发送 0x01 0x02 0x03 三个数据，执行完ScibRegs。SCITXBUF = SendBuf[i]&0xFF;后只发送0x01 0x02,执行完第二次发送0x03 0x01 0x02,是什么原因第一次不直接发送三个数据？
代码如下“
#define SCI ScibRegs
初始化：
SCI.SCIFFTX.all=0xE040;
//ScibRegs.SCIFFCT.bit.FFTXDLY = 8;
SCI.SCIFFRX.all=0x206F;
SCI.SCIFFRX.bit.RXFFIL = 5; //in protocal. num of needing to recieved is 9
//SCI FIFO Control Register
SCI.SCIFFCT.all=0x0;
//SCI Communication Control Register
SCI.SCICCR.all =0x0007; // 1 stop bit, No loopback
//No parity,8 char bits,
// async mode, idle-line protocol
//SCI Control Register 1
SCI.SCICTL1.all = 0x0003; //enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
//SCI Control Register 2
SCI.SCICTL2.bit.TXINTENA = 0;
SCI.SCICTL2.bit.RXBKINTENA = 1; //enable rx interrupt
//Baud=LPSCLK/((BRR+1)x8) ->BRR= (LPSCLK/(Baud x 8))-1 (1<=BRR<= 65535)
//Baud=LPSCLK/16 -> BRR = 0
BaudRate = SCI_PRD;
BaudRate = (BaudRate >> 8);
SCI.SCIHBAUD = BaudRate; // 115200 baud @LSPCLK = 37.5MHz.
BaudRate = SCI_PRD;
BaudRate = (BaudRate & 0x00FF);
SCI.SCILBAUD = BaudRate;
SCI.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
SCI.SCIFFTX.bit.TXFIFOXRESET = 1; SCI.SCIFFRX.bit.RXFIFORESET = 1;
发送：
for(i=0;i<3;i++)
{
while (SCI.SCICTL2.bit.TXRDY != 1) ;
SCI.SCITXBUF = SendBuf[i]&0xFF;
}
tecman chen：
回复 Seven Han:
代码改为：for(i=0;i<3;i++){SCI.SCITXBUF = SendBuf[i]&0xFF;while(SCI.SCIFFTX.bit.TXFFST != 0){} //FIFO has word}
第一次发送 0x01 0x02 ,第二次后都是0x03 0x01 0x02
代码改为：for(i=0;i<3;i++){while(SCI.SCIFFTX.bit.TXFFST != 0){} //FIFO has wordSCI.SCITXBUF = SendBuf[i]&0xFF;}
第一次发送0x01, 第二次发送都是0x02 0x03 0x01
还是有问题
