spi.c

SAMSUNG官方发布的S3C2410开发板的最完整测试程序。本人用ADS1.2对其进行了优化和改进

#include <string.h>
#include "2410addr.h"
#include "2410lib.h"
#include "spi.h"
#include "def.h"

#define spi_count 0x80
#define SPI_BUFFER _NONCACHE_STARTADDRESS

void __irq Spi_Int(void);
//void __irq Spi_M_Rx_Int(void);
//void __irq Spi_S_Tx_Int(void);
void __irq Dma1Tx_Int(void);
void __irq Dma1Rx_Int(void);

volatile char *spiTxStr,*spiRxStr;
volatile int endSpiTx;
volatile int tx_dma1Done;
volatile int rx_dma1Done;
unsigned int spi_rGPECON,spi_rGPEDAT,spi_rGPEUP;
unsigned int spi_rGPGCON,spi_rGPGDAT,spi_rGPGUP;
/****************************************************************
 *	             SMDK2400 SPI configuration                 *
 *  GPG2=nSS0, GPE11=SPIMISO0, GPE12=SPIMOSI0, GPE13=SPICLK0     *
 *  GPG3=nSS1, GPG5 =SPIMISO1, GPG6 =SPIMOSI1, GPG7 =SPICLK1      *
 *  SPI1 is tested by OS(WINCE). So, Only SPI0 is tested by this code          *               
 ****************************************************************/

void SPI_Port_Init(int MASorSLV)
{
    spi_rGPECON=rGPECON;
    spi_rGPEDAT=rGPEDAT;
    spi_rGPEUP=rGPEUP;
    rGPEUP&=~(0x3800);
    rGPEUP|=0x2000;
//    rGPEUP|=(0x3800);
    rGPECON=((rGPECON&0xf03fffff)|0xa800000);

    spi_rGPGCON=rGPGCON;
    spi_rGPGDAT=rGPGDAT;
    spi_rGPGUP=rGPGUP;
    rGPGUP|=0x4;
    if(MASorSLV==1)
    {
        rGPGCON=((rGPGCON&0xffffffcf)|0x10); // Master(GPIO_Output)
        rGPGDAT|=0x4; // Activate nSS 
    }
    else
    	rGPGCON=((rGPGCON&0xffffffcf)|0x30); // Slave(nSS)
}

void SPI_Port_Return(void)
{
    rGPECON=spi_rGPECON;
    rGPEDAT=spi_rGPEDAT;
    rGPEUP=spi_rGPEUP;

    rGPGCON=spi_rGPGCON;
    rGPGDAT=spi_rGPGDAT;
    rGPGUP=spi_rGPGUP;
}


void Test_Spi_MS_int(void)
{
    char *txStr,*rxStr;
    SPI_Port_Init(0); 
    Uart_Printf("[SPI0 Interrupt Tx/Rx Test]\n");
    Uart_Printf("Connect SPIMOSI0 into SPIMISO0.\n");

    pISR_SPI0=(unsigned)Spi_Int;
    endSpiTx=0;
    spiTxStr="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    spiRxStr=(char *) SPI_BUFFER;
    txStr=(char *)spiTxStr;
    rxStr=(char *)spiRxStr;
    rSPPRE0=0x0;	//if PCLK=50Mhz,SPICLK=25Mhz
    rSPCON0=(1<<5)|(1<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//int,en-SCK,master,low,A,normal
    rSPPIN0=(0<<2)|(1<<1)|(0<<0);//dis-ENMUL,SBO,release
    rINTMSK=~(BIT_SPI0);

    while(endSpiTx==0);

    rSPCON0=(0<<5)|(0<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//Poll,dis-SCK,master,low,A,normal
    *spiRxStr='\0';//attach End of String(Null)
    Uart_Printf("Tx Strings:%s\n",txStr);
    Uart_Printf("Rx Strings:%s :",rxStr+1);//remove first dummy data
    if(strcmp(rxStr+1,txStr)==0)
        Uart_Printf("O.K.\n");
    else 
        Uart_Printf("ERROR!!!\n");
    SPI_Port_Return();
}

void __irq Spi_Int(void)
{
    unsigned int status;
    ClearPending(BIT_SPI0); 
    status=rSPSTA0;
    if(rSPSTA0&0x6) 
    	Uart_Printf("Data Collision or Multi Master Error(0x%x)!!!\n", status);
    while(!(status&0x1));   //Check ready state
    *spiRxStr++=rSPRDAT0;    //First Rx data is garbage data
    if(*spiTxStr!='\0') 
    	rSPTDAT0=*spiTxStr++;
    else
    {
		rINTMSK|=BIT_SPI0;
	    endSpiTx=1;
    }
}

void Test_Spi_MS_poll(void)
{
//    int i;
    char *txStr,*rxStr;
    SPI_Port_Init(0); 
    Uart_Printf("[SPI Polling Tx/Rx Test]\n");
    Uart_Printf("Connect SPIMOSI0 into SPIMISO0.\n");
    endSpiTx=0;
    spiTxStr="ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    spiRxStr=(char *) SPI_BUFFER;
    txStr=(char *)spiTxStr;
    rxStr=(char *)spiRxStr;

    rSPPRE0=0x0;	//if PCLK=50Mhz,SPICLK=25Mhz
    rSPCON0=(0<<5)|(1<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//Polling,en-SCK,master,low,A,normal
    rSPPIN0=(0<<2)|(1<<1)|(0<<0);//dis-ENMUL,SBO,release
    
    while(endSpiTx==0)
    {
		if(rSPSTA0&0x1)   //Check Tx ready state    
		{
	    	if(*spiTxStr!='\0')
				rSPTDAT0=*spiTxStr++;
	    	else
				endSpiTx=1;
	    	while(!(rSPSTA0&0x1));   //Check Rx ready state 
			*spiRxStr++=rSPRDAT0;
		}
    }

    rSPCON0=(0<<5)|(0<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//Polling,dis-SCK,master,low,A,normal
    *(spiRxStr-1)='\0';//remove last dummy data & attach End of String(Null)
    
    Uart_Printf("Tx Strings:%s\n",txStr);
    Uart_Printf("Rx Strings:%s :",rxStr);
    
    if(strcmp(rxStr,txStr)==0)
        Uart_Printf("O.K.\n");
    else 
        Uart_Printf("ERROR!!!\n");
    SPI_Port_Return();
}


void Test_Spi_M_Tx_DMA1(void)
{

    int i/*,first,second*/;
    unsigned char *tx_ptr;
    SPI_Port_Init(1); // Master(GPIO) 
    Uart_Printf("[SPI DMA1 Master Tx test]\n");
    Uart_Printf("This test should be configured two boards\nStart Rx first.\n");

    tx_ptr=(unsigned char *) SPI_BUFFER;
    for(i=0; i<spi_count; i++)
		*(tx_ptr+i)=i; 

    tx_dma1Done=0;

    pISR_DMA1 = (unsigned)Dma1Tx_Int;
    rINTMSK=~(BIT_DMA1);

    //Step1. SPI init
    rSPPRE0=0x0;	//if PCLK=50Mhz,SPICLK=25Mhz
//    rSPCON0=(2<<5)|(1<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//DMA1,en-SCK,master,low,A,normal
    rSPCON0=(2<<5)|(1<<4)|(1<<3)|(1<<2)|(1<<1)|(0<<0);//DMA1,en-SCK,master,low,B,normal    
    rSPPIN0=(0<<2)|(1<<1)|(0<<0);//dis-ENMUL,SBO,release

    //Step2. DMA1 init 
    rDISRC1=(unsigned)tx_ptr;	//Address of Memory
    rDISRCC1=(0<<1)|(0);		//AHB(Memory), inc
    rDIDST1=(unsigned)0x59000010;//Address of SPTDAT Register
    rDIDSTC1=(1<<1)|(1);		//APB(SPI), fix
    rDCON1=((unsigned)1<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(3<<24)|(1<<23)|(1<<22)|(0<<20)|(spi_count);
    //handshake, sync PCLK, TC int, single tx, single service, SPI, H/W request, 
    //off-reload, byte, 128Bytes

    rGPGDAT&=0xfffffffb; // Activate nSS 
    rDMASKTRIG1=(0<<2)|(1<<1)|(0);    //run, DMA1 channel on, no-sw trigger 

    while(tx_dma1Done==0);

    while(!(rSPSTA0&0x1)); // Tx is done

    rGPGDAT|=0x4; // Deactivate nSS 
//    rSPCON0=(0<<5)|(0<<4)|(1<<3)|(1<<2)|(0<<1)|(0<<0);//poll,dis-SCK,master,low,A,normal
    rSPCON0=(0<<5)|(0<<4)|(1<<3)|(1<<2)|(1<<1)|(0<<0);//poll,dis-SCK,master,low,B,normal
    Uart_Printf("\nDMA1 transfer end\n");
    for(i=0; i<spi_count; i++)
		Uart_Printf("0x%02x,",*tx_ptr++);
    SPI_Port_Return();
}

void __irq Dma1Tx_Int(void)
{
    tx_dma1Done=1;
    rINTMSK|=BIT_DMA1;
    ClearPending(BIT_DMA1);
}


void Test_Spi_S_Rx_DMA1(void)
{
    int i;
    unsigned char *rx_ptr;
    SPI_Port_Init(0); // Slave(nSS) 
    Uart_Printf("[SPI DMA1 Slave Rx Test]\n");
    Uart_Printf("This test should be configured two boards\nStart Rx first.\n");
    rx_ptr=(unsigned char *) SPI_BUFFER;
    for(i=0;i<0x500;i++)
		*(rx_ptr+i)=0x0; // Zero Initialize
    rx_dma1Done=0;

    pISR_DMA1 = (unsigned)Dma1Rx_Int;
    rINTMSK=~(BIT_DMA1);

    //Step1. SPI init
    rSPPRE0=0x0;	//if PCLK=50Mhz,SPICLK=25Mhz
//    rSPCON0=(2<<5)|(0<<4)|(0<<3)|(1<<2)|(0<<1)|(1<<0);//DMA1,dis-SCK,slave,low,A,TAGD
    rSPCON0=(2<<5)|(0<<4)|(0<<3)|(1<<2)|(1<<1)|(1<<0);//DMA1,dis-SCK,slave,low,B,TAGD
    //When you use [Slave Rx with DMA] function you should have to set TAGD bit
    rSPPIN0=(0<<2)|(1<<1)|(0<<0);//dis-ENMUL,SBO,release

    //Step2. DMA1 init 
    rDISRC1=(unsigned)0x59000014;//Address of SPRDAT Register
    rDISRCC1=(1<<1)|(1);		//APB(SPI), fix
    rDIDST1=(unsigned)rx_ptr;	//Address of Memory
    rDIDSTC1=(0<<1)|(0);		//AHB(Memory), inc
    rDCON1=((unsigned)1<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(3<<24)|(1<<23)|(1<<22)|(0<<20)|(spi_count);
    //handshake, sync PCLK, TC int, single tx, single service, SPI, H/W request, 
    //off-reload, byte, 128Bytes

    rDMASKTRIG1=(0<<2)|(1<<1)|(0);    //run, DMA1 channel on, no-sw trigger 

    while(rx_dma1Done==0);

    rSPCON0=(0<<5)|(0<<4)|(0<<3)|(1<<2)|(0<<1)|(0<<0);//poll,dis-SCK,slave,low,A,normal
    while(!rSPSTA0&0x1);
    *(rx_ptr+spi_count)=rSPRDAT0;
    rx_ptr=(unsigned char *) SPI_BUFFER;
    for(i=1;i<(spi_count+1);i++)
		Uart_Printf("0x%02x,",*(rx_ptr+i));
    Uart_Printf("\nDMA1 receive end");
    SPI_Port_Return();
}

void __irq Dma1Rx_Int(void)
{
    rx_dma1Done=1;
    rINTMSK|=BIT_DMA1;
    ClearPending(BIT_DMA1);
}


void Test_Spi_M_Rx_DMA1(void)
{
    int i;
    unsigned char *rx_ptr;
    SPI_Port_Init(1); // Master(GPIO)