omumisc.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 "omumisc.h"

static void OmuMiscInit(void *pDataBuf, OmuMiscCfgStruct *cfg )
{
    OmuMiscCfgStruct*   pCfg =(OmuMiscCfgStruct *)(pDataBuf);
    memmove(pCfg,cfg,sizeof(*cfg));
}

static int OmuMiscCntrl(void *pDataBuf, int cmd, void *pParam, int maxlen)
{
    int i,ret,index,len;
    OmuMiscCfgStruct*  pCfg =(OmuMiscCfgStruct *)(pDataBuf);
    switch(cmd)
    {
        case SDC_REINIT:
            OmuMiscInit(pDataBuf,pCfg);
            break;

        case SDC_GET_ALARMS:
            i=0; len=maxlen/4;
            if( (GET_PB_BIT(17) )==0 ){
                if(i>=len)return SDE_SHORTER_BUF;
                ((ULONG*)pParam)[i++]=SDA_LOST_4M;
                }
            if( (GET_PB_BIT(18) )==0 ){
                if(i>=len)return SDE_SHORTER_BUF;
                ((ULONG*)pParam)[i++]=SDA_LOST_8K;
                }
            return i;
        default: 
            return SDE_UNKNOW_CMD;

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

char *OmuMiscBspInit(int DEV, char *FreeMemPtr, OmuMiscCfgStruct *cfg)
{
    InstallSD(DEV,NULL,NULL,OmuMiscCntrl,FreeMemPtr);
    OmuMiscInit(FreeMemPtr, cfg); 
    FreeMemPtr += sizeof(OmuMiscCfgStruct);
    memcpy(FreeMemPtr,"*OmuMisc",8);
    FreeMemPtr += 8;
    return FreeMemPtr;
}