ecommisc.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 "ecommisc.h"

static void EcomMiscInit(void *pDataBuf, EcomMiscCfgStruct *cfg )
{
    EcomMiscCfgStruct*   pCfg =(EcomMiscCfgStruct *)(pDataBuf);
    memmove(pCfg,cfg,sizeof(*cfg));
}

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

        case SDC_GET_ALARMS:
            i=0; len=maxlen/4;
            if( (pda->pip_pbdat & (1L<<(31-28)) )==0 ){
                if(i>=len)return SDE_SHORTER_BUF;
                ((ULONG*)pParam)[i++]=SDA_LOST_CLK;
                }
            return i;
        default: 
            return SDE_UNKNOW_CMD;

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

char *EcomMiscBspInit(int DEV, char *FreeMemPtr, EcomMiscCfgStruct *cfg)
{
    InstallSD(DEV,NULL,NULL,EcomMiscCntrl,FreeMemPtr);
    EcomMiscInit(FreeMemPtr, cfg); 
    FreeMemPtr += sizeof(EcomMiscCfgStruct);
    memcpy(FreeMemPtr,"*EcomMisc",8);
    FreeMemPtr += 8;
    return FreeMemPtr;
}