aplfw/driver/serial/pc16550/pc16550drv_open.c

   1 /**
   2  *  Hyper Operating System  Application Framework
   3  *
   4  * @file  scidrv.c
   5  * @brief %jp{PC16550用デバイスドライバ}
   6  *
   7  * Copyright (C) 2006 by Project HOS
   8  * http://sourceforge.jp/projects/hos/
   9  */
  10
  11
  12 #include "pc16550drv_local.h"
  13
  14
  15 /** オープン */
  16 HANDLE Pc16550Drv_Open(C_DRVOBJ *pDrvObj, const char *pszPath, int iMode)
  17 {
  18         C_PC16550DRV    *self;
  19         C_CHRFILE               *pFile;
  20
  21         /* upper cast */
  22         self = (C_PC16550DRV *)pDrvObj;
  23
  24         /* create file descriptor */
  25         if ( (pFile = SysMem_Alloc(sizeof(*pFile))) == NULL )
  26         {
  27                 return HANDLE_NULL;
  28         }
  29         ChrFile_Create(pFile, pDrvObj, NULL);
  30
  31
  32         /* オープン処理 */
  33         if ( self->iOpenCount++ == 0 )
  34         {
  35                 Pc16550Hal_Setup(&self->Pc16550Hal);
  36                 Pc16550Hal_SetSpeed(&self->Pc16550Hal, 38400);
  37                 Pc16550Hal_EnableInterrupt(&self->Pc16550Hal, PC16550HAL_IER_ERBFI);
  38                 SysInt_Enable(self->iIntNum);
  39         }
  40
  41         return (HANDLE)pFile;
  42 }
  43
  44
  45 /* end of file */