pcommisc.c

这是单板上DPRAM的驱动程序

#include <psos.h>
#include "board.h"
#include "sdev.h"
#include "bspspec.h"
#include "pcommisc.h"

static void PcomMiscInit(void *pDataBuf, PcomMiscCfgStruct *cfg )
{
    PcomMiscCfgStruct*   pCfg =(PcomMiscCfgStruct *)(pDataBuf);
    memmove(pCfg,cfg,sizeof(*cfg));
}

static int PcomMiscCntrl(void *pDataBuf, int cmd, void *pParam, int maxlen)
{
    int i,len;
    PDA *pda= (PDA *)(GetIMMR() & IO_MAP_MASK);  
    PcomMiscCfgStruct*  pCfg =(PcomMiscCfgStruct *)(pDataBuf);
    switch(cmd)
    {
        case SDC_REINIT:
            PcomMiscInit(pDataBuf,pCfg);
            break;

        case SDC_GET_ALARMS:
            i=0; len=maxlen/4;
            if( GET_PB_BIT(28)==1){
                if(i>=len)return SDE_SHORTER_BUF;
                ((ULONG*)pParam)[i++]=SDA_LOST_CLK;
                 SET_PD_BIT(14,0);
                 SET_PD_BIT(14,1);
                }
             return i;
        default: 
            return SDE_UNKNOW_CMD;

    }/* end of switch(cmd) */
    return SDE_OK;
}

char *PcomMiscBspInit(int DEV, char *FreeMemPtr, PcomMiscCfgStruct *cfg)
{
    InstallSD(DEV,NULL,NULL,PcomMiscCntrl,FreeMemPtr);
    PcomMiscInit(FreeMemPtr, cfg); 
    FreeMemPtr += sizeof(PcomMiscCfgStruct);
    memcpy(FreeMemPtr,"*PcomMisc",8);
    FreeMemPtr += 8;
    return FreeMemPtr;
}