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S3C2440 spi :how to transfer&recieve continuously

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

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0 ou caijun over 12 years ago

I should have give you more information,here is the code how i set the SPICON:


void fram_con_init(void){
        rGPCCON=0x45;
        rGPECON=((2<<26)|(2<<24)|(2<<22));
        rGPCUP&=0xffff;//pullup_enable---out
        rGPEUP&=0xf7ff;
        //gpe11,12,13---so,si,clk
}

extern void FRAM_SPI_Init(void)
{
        fram_con_init();
        FRAM_HOLD_HIGH;
        SPICS_HIGH;     //FRAM_SPI CS disable
        rSPPRE0=PCLK/2/SpiBaudRate-1;//SET SpiBaudRate
        rSPCON0=(0<<6)|(1<<5)|(1<<4)|(1<<3)|(0<<2)|(0<<1)|(0<<0);
//Polling mode,dis-SCK,master,low,B,normal
        rSPPIN0=(0<<2)|(0<<0);//dis-ENMUL,SBO,release
}

Any suggestion will be great!

Thanks for the help.

Reply

0 ou caijun over 12 years ago

I should have give you more information,here is the code how i set the SPICON:


void fram_con_init(void){
        rGPCCON=0x45;
        rGPECON=((2<<26)|(2<<24)|(2<<22));
        rGPCUP&=0xffff;//pullup_enable---out
        rGPEUP&=0xf7ff;
        //gpe11,12,13---so,si,clk
}

extern void FRAM_SPI_Init(void)
{
        fram_con_init();
        FRAM_HOLD_HIGH;
        SPICS_HIGH;     //FRAM_SPI CS disable
        rSPPRE0=PCLK/2/SpiBaudRate-1;//SET SpiBaudRate
        rSPCON0=(0<<6)|(1<<5)|(1<<4)|(1<<3)|(0<<2)|(0<<1)|(0<<0);
//Polling mode,dis-SCK,master,low,B,normal
        rSPPIN0=(0<<2)|(0<<0);//dis-ENMUL,SBO,release
}

Any suggestion will be great!

Thanks for the help.

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