aucmisc.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 "aucmisc.h"

static void AucMiscInit(void *pDataBuf, AucMiscCfgStruct *cfg )
{
    AucMiscCfgStruct*   pCfg =(AucMiscCfgStruct *)(pDataBuf);
    memmove(pCfg,cfg,sizeof(*cfg));
}

static int AucMiscCntrl(void *pDataBuf, int cmd, void *pParam, int maxlen)
{
    int ret,i;
    ULONG *buf;
    AucMiscCfgStruct*  pCfg =(AucMiscCfgStruct *)(pDataBuf);
    switch(cmd)
    {
        case SDC_REINIT:
            AucMiscInit(pDataBuf,pCfg);
            break;
        case SDC_GET_ALARMS:
            buf=(ULONG *)pParam;i=0; maxlen/=4;
            if(IsClkLost()==1){
               if(i>=maxlen)return SDE_SHORTER_BUF;
               buf[i++]=SDA_CLK8K_LOST; 
            }             
            return i;
        default: 
            return SDE_UNKNOW_CMD;

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

char *AucMiscBspInit(int DEV, char *FreeMemPtr, AucMiscCfgStruct *cfg)
{
    InstallSD(DEV,NULL,NULL,AucMiscCntrl,FreeMemPtr);
    AucMiscInit(FreeMemPtr, cfg); 
    FreeMemPtr += sizeof(AucMiscCfgStruct);
    memcpy(FreeMemPtr,"*AucMisc",8);
    FreeMemPtr += 8;
    return FreeMemPtr;
}