如何在PIC18F2550上为SPI模块编写一个读取和其他写入功能

好的，伙计们。我想弄清楚如何在PIC18F2550上为SPI模块编写一个读取和其他写入功能，但它驱动我疯狂。BF：缓冲器满状态位（仅接收模式）。如果写和读是同时执行的操作，“接收MOD的目的是什么？”仅E）？好的，所以在发送/接收数据之后，BF设置为1，并保持设置，直到SPBUF被读取，对不对？我没有遇到任何问题的阅读功能，如下所示：相反，我遇到的问题在写功能。如果我这样写：我怎么能确信我没有覆盖SpBuf做一些类似的事情：在这个CASEWCOL被设置并且第二个传输没有启动。如果我错了，请纠正我。我怎样才能克服这个问题呢？我可以这样做：非常感谢你们！祝您有个美好的一天。。。还是夜晚？：）



      以下为原文

    Ok guys. I'm trying to figure it out how to write a function for read and other for write on an spi module for the pic 18f2550 but it drives me crazy.
BF: Buffer Full Status bit (Receive mode only) - If writing and reading are operations that are executed in the same time, what's the purpose of "(Receive mode only)"?
Ok, so after transmitting/receiving the data, the BF is set to 1 and remains set until SSPBUF is read, right?

I do not encounter any problems for the read function, exampled below:
unsigned char SPI_read(void) // Read the received dataRead the received data
{
  while ( !SSPSTATbits.BF ); // Wait for Data Receipt complete
  return (SSPBUF);
}


Instead I encounter problems at the write function. If I write it like this:
void SPI_Write(unsigned char data) //Write data to SPI bus
{
  SSPBUF = data;
}
How can I be sure I do not overwrite the SSPBUF doing something like:
SPI_Write(0xaa);
SPI_Write(0xbb);
In this case WCOL is set and the second transmission does not start. Correct me if I'm wrong. How can I overcome this problem? can I do something like:


void SPI_Write(unsigned char data) //Write data to SPI bus
{
while ( SSPSTATbits.BF );
SSPBUF = data;
}

main functions call:

SPI_Write(0xaa);
SPI_Read(); // dummy read to set BF to 0.
SPI_Write(0xbb);



Thank you guys so much! Have a nice day... or night? :)