spi1.c

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/******************************************************
* Function: s3c2440 spi1 driver
*
* File:   spi1.c
* Author: Book Chen
* Date:   2008.07.18
*******************************************************
*/
#include "includes.h"

#define Spi1IdleState 0

SPI1_CONTROL Spi1Ctrl;

void F_Spi1Init(void);
void F_Spi1Svc(void);
INT8U F_Spi1InUseCheck(void);
INT8U F_Spi1Allocate(INT16U UserId);
INT8U F_Spi1Release(INT16U UserId);
INT8U F_Spi1SpconSet(INT16U UserId,INT8U SpconValue);
INT8U F_Spi1SpstaGet(INT16U UserId,INT8U *pSpstaValue);
INT8U F_Spi1SppinSet(INT16U UserId,INT8U SppinValue);
INT8U F_Spi1SppreSet(INT16U UserId,INT8U SppreValue);
INT8U F_Spi1SptdatSet(INT16U UserId,INT8U SptdatValue);
INT8U F_Spi1SprdatGet(INT16U UserId,INT8U *pSprdatValue);
INT8U F_Spi0IsrHookFunctionSet(INT16U UserId,INT32U Function);

void F_Spi1Init(void){
    //hardware initial
    rGPGUP&=~0x00e0;      // enable GPG[7.6.5] pull up resistor 
    rGPGUP|= 0x0080;       // disable GPG[7.6.5] pull up resistor
        rGPGCON&=~0x0000fc00; // 
        rGPGCON|= 0x0000fc00;  // set GPE[13.12.11] to SPICLK0,SPISI0,SPISO0      
        rGPGUP&=~0x0008;      // disable GPG[3] pull up resistor
        rGPGCON&=~0x000000c0; // 
        rGPGCON|= 0x000000c0; // set GPG[3] to nSS1...spi chip select for slave mode       
    //data struct initial
    Spi1Ctrl.pSpi1Register=(SPI1_REGISTER *)0x59000020;
    Spi1Ctrl.pSpi1Register->SPCON=0x00000000;
    Spi1Ctrl.pSpi1Register->SPSTA=0x00000001;
    Spi1Ctrl.pSpi1Register->SPPIN=0x00000002;    
    Spi1Ctrl.pSpi1Register->SPPRE=0x00000000;        
    Spi1Ctrl.Id=ID_SPI1;
    Spi1Ctrl.InUse=FALSE;
    Spi1Ctrl.State=Spi1IdleState;
}
void F_Spi1Svc(void){}
INT8U F_Spi1InUseCheck(void){
    if(Spi1Ctrl.InUse==TRUE) return TRUE;
    else  return FALSE;
}
INT8U F_Spi1Allocate(INT16U UserId){
    if(Spi1Ctrl.InUse==FALSE){
        Spi1Ctrl.InUse=TRUE;
        Spi1Ctrl.UserId=UserId;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi1Release(INT16U UserId){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        Spi1Ctrl.InUse=FALSE;        
        Spi1Ctrl.State=Spi1IdleState;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi1SpconSet(INT16U UserId,INT8U SpconValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        Spi1Ctrl.pSpi1Register->SPCON=(INT32U)SpconValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi1SpstaGet(INT16U UserId,INT8U *pSpstaValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        *pSpstaValue=(INT32U)Spi1Ctrl.pSpi1Register->SPSTA;
        return TRUE;
    }    
    else return FALSE;
}    
INT8U F_Spi1SppinSet(INT16U UserId,INT8U SppinValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        Spi1Ctrl.pSpi1Register->SPPIN=(INT32U)SppinValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi1SppreSet(INT16U UserId,INT8U SppreValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        Spi1Ctrl.pSpi1Register->SPPRE=(INT32U)SppreValue;
        return TRUE;
    }    
    else return FALSE;
}    
INT8U F_Spi1SptdatSet(INT16U UserId,INT8U SptdatValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        Spi1Ctrl.pSpi1Register->SPTDAT=(INT32U)SptdatValue;
        return TRUE;
    }    
    else return FALSE;
}     
INT8U F_Spi1SprdatGet(INT16U UserId,INT8U *pSprdatValue){
    if((Spi1Ctrl.InUse==TRUE)&&(Spi1Ctrl.UserId==UserId)){
        *pSprdatValue=(INT32U)Spi1Ctrl.pSpi1Register->SPRDAT;
        return TRUE;
    }    
    else return FALSE;
}
INT8U F_Spi1IsrHookFunctionSet(INT16U UserId,INT32U Function){
    if((Spi0Ctrl.InUse==TRUE)&&(Spi0Ctrl.UserId==UserId)){          
            pISR_SPI1=Function;
            return TRUE; 
    }
        else return FALSE;      
}