Hello everyone ,I am working with a board based on S3C2440A .
I am trying to transmit datas & commands from S3C2440A to a FRAM_CHIP hang on the S3C2440A' SPI_bus. I find that S3C2440 only have 8 bit spi_bus_width. But in fact I need the flow of bits to be continuously at least in a 32 bits. I know that some chips such as S5PC100 have 8-32 spi_bus_width,how can I make it with S3C2440?
The follow is the code I did,and there was a interval between each flow of 8bit when I observe the SPIMOSI0 & SPICLK signal with oscilloscope.
extern void inline TxSPI0_Byte(U8 data) { rSPTDAT0=data; while(!(rSPSTA0&0x01));//wait until Tx/Rx ready } extern void WrMemStatReg(unsigned char data) //CMD to operate FRAM { SPICS_LOW; //FRAM CS ON TxSPI0_Byte(WRSR_CMD);//wave A --8bit TxSPI0_Byte(data); //wave B --8bit SPICS_HIGH; } wave A and wave B are not continuously
But in fact I need the flow of bits to be continuously at least in a 32 bits.
I'm close to 100% certain you don't. If you do, that's not SPI.