spi0.c

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/******************************************************
* Function: s3c2440 spi0 driver
*
* File:   spi0.c
* Author: Book Chen
* Date:   2008.07.18
*******************************************************
*/
#include "includes.h"

#define Spi0IdleState 0

SPI0_CONTROL Spi0Ctrl;

void F_Spi0Init(void);
void F_Spi0Svc(void);
INT8U F_Spi0InUseCheck(void);
INT8U F_Spi0Allocate(INT16U UserId);
INT8U F_Spi0Release(INT16U UserId);
INT8U F_Spi0SpconSet(INT16U UserId,INT8U SpconValue);
INT8U F_Spi0SpstaGet(INT16U UserId,INT8U *pSpstaValue);
INT8U F_Spi0SppinSet(INT16U UserId,INT8U SppinValue);
INT8U F_Spi0SppreSet(INT16U UserId,INT8U SppreValue);
INT8U F_Spi0SptdatSet(INT16U UserId,INT8U SptdatValue);
INT8U F_Spi0SprdatGet(INT16U UserId,INT8U *pSprdatValue);
INT8U F_Spi0IsrHookFunctionSet(INT16U UserId,INT32U Function);

void F_Spi0Init(void){
    // hardware initial
    rGPEUP&=~0x3800;      // enable  GPE[13.12.11] pull up resistor     
    rGPEUP|= 0x2000;      // disable GPE[13.12.11] pull up resistor
        rGPECON&=~0x0fc00000; // 
        rGPECON|= 0x0a800000; // set GPE[13.12.11] to SPICLK0,SPISI0,SPISO0  
        rGPGUP&=~0x0004;      // disable GPG[3] pull up resistor
        rGPGCON&=~0x00000030; // 
        rGPGCON|= 0x00000030; // set GPG[3] to nSS0...spi chip select for slave mode   
    
    // data struct initial
    Spi0Ctrl.pSpi0Register=(SPI0_REGISTER *)0x59000000;
    Spi0Ctrl.pSpi0Register->SPCON=0x00000000;
    Spi0Ctrl.pSpi0Register->SPSTA=0x00000001;
    Spi0Ctrl.pSpi0Register->SPPIN=0x00000002;    
    Spi0Ctrl.pSpi0Register->SPPRE=0x00000000;        
    Spi0Ctrl.Id=ID_SPI0;
    Spi0Ctrl.InUse=FALSE;
    Spi0Ctrl.State=Spi0IdleState;
}
void F_Spi0Svc(void){}
INT8U F_Spi0InUseCheck(void){
    if(Spi0Ctrl.InUse==TRUE) return TRUE;
    else  return FALSE;
}
INT8U F_Spi0Allocate(INT16U UserId){
    if(Spi0Ctrl.InUse==FALSE){
        Spi0Ctrl.InUse=TRUE;
        Spi0Ctrl.UserId=UserId;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi0Release(INT16U UserId){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        Spi0Ctrl.InUse=FALSE;        
        Spi0Ctrl.State=Spi0IdleState;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi0SpconSet(INT16U UserId,INT8U SpconValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        Spi0Ctrl.pSpi0Register->SPCON=(INT32U)SpconValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi0SpstaGet(INT16U UserId,INT8U *pSpstaValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        *pSpstaValue=(INT32U)Spi0Ctrl.pSpi0Register->SPSTA;
        return TRUE;
    }    
    else return FALSE;
}    
INT8U F_Spi0SppinSet(INT16U UserId,INT8U SppinValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        Spi0Ctrl.pSpi0Register->SPPIN=(INT32U)SppinValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi0SppreSet(INT16U UserId,INT8U SppreValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        Spi0Ctrl.pSpi0Register->SPPRE=(INT32U)SppreValue;
        return TRUE;
    }    
    else return FALSE;
}    
INT8U F_Spi0SptdatSet(INT16U UserId,INT8U SptdatValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        Spi0Ctrl.pSpi0Register->SPTDAT=(INT32U)SptdatValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi0SprdatGet(INT16U UserId,INT8U *pSprdatValue){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){
        *pSprdatValue=(INT32U)Spi0Ctrl.pSpi0Register->SPRDAT;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi0IsrHookFunctionSet(INT16U UserId,INT32U Function){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){          
            pISR_SPI0=Function;
            return TRUE; 
    }
        else return FALSE;      
}