sci_hw.c

T－Kernel Driver Sample

/*""FILE COMMENT""*************************************************************
*       System Name : RENESAS T-Engine/micro T-Engine
*       File Name   : sci_hw.c
*       Version     : 1.00.00
*       Contents    : Initialize/Finish SCI hardware
*       Model       : SH7145 micro T-Engine
*       CPU         : SH7145F
*       Compiler    : GNU/Renesas SH-C
*       OS          : T-Kernel
*       note        : The Software is being delivered to you "AS IS" 
*                   : and Renesas,whether explicitly or implicitly makes  
*                   : no warranty as to its Use or performance. 
*                   : RENESAS AND ITS SUPPLIER DO NOT AND CANNOT WARRANT 
*                   : THE PERFORMANCE OR RESULTS YOU MAY OBTAIN  BY USING 
*                   : THE SOFTWARE. AS TO ANY MATTER INCLUDING WITHOUT 
*                   : LIMITATION NONINFRINGEMENT OF THIRD PARTY RIGHTS,
*                   : MERCHANTABILITY, INTEGRATION, SATISFACTORY QUALITY, 
*                   : OR FITNESS FOR ANY PARTICULAR PURPOSE.
*
*       Copyright (c) 2005 RENESAS TECHNOLOGY CORP. All Rights Reserved.
*       AND RENESAS SOLUTIONS CORP. All Rights Reserved.
*       history   : 2005.01.11 ver1.00.00
*""FILE COMMENT END""*********************************************************/

#define USE_TASKMONITOR // SCI1 use task monitor

#include "sci_common.h"
#include "sci_cpudef.h"

/*""FUNC COMMENT""*******************************************************
 * ID          : 
 * Outline     : initialize SCI hardware
 *-----------------------------------------------------------------------
 * Include     : sci_common.h
 *-----------------------------------------------------------------------
 * Definition  : ER init_hw(INT,INT) 
 *-----------------------------------------------------------------------
 * Function    : initialize SCI hardware
 *-----------------------------------------------------------------------
 * Argument    : INT port
 *             : INT bps 
 *----------------------------------------------------------------------- 
 * Return      : error code
 *-----------------------------------------------------------------------
 * Input       : None 
 * Output      : None 
 *-----------------------------------------------------------------------
 * Used Func   : WaitUsec()
 *             :  
 *-----------------------------------------------------------------------
 * Notice      : None
 *""FUNC COMMENT END""***************************************************/
EXPORT ER init_hw(INT port, INT bps)
{
  REG_SCR(port) = SCR_INIT;
  /* SCR_CKE0, CKE1 */
  REG_SMR(port) = SMR_INIT;

  switch (bps) {
  case 600:
    SET_BRCNT(port, BRCNT_600);
    break;
  case 1200:
    SET_BRCNT(port, BRCNT_1200);
    break;
  case 2400:
    SET_BRCNT(port, BRCNT_2400);
    break;
  case 4800:
    SET_BRCNT(port, BRCNT_4800);
    break;
  case 9600: default:
    SET_BRCNT(port, BRCNT_9600);
    break;
  case 19200:
    SET_BRCNT(port, BRCNT_19200);
    break;
  case 38400:
    SET_BRCNT(port, BRCNT_38400);
    break;
  case 115200:
    SET_BRCNT(port, BRCNT_115200);
    break;
  }

  WaitUsec(110);  /* wait 110 micro sec (9600bps 1bit + @) */
  
  REG_SCR(port) |= (SCR_RE | SCR_TE);

  return E_OK;
}

/*""FUNC COMMENT""*******************************************************
 * ID          : 
 * Outline     : Finish SCI hardware
 *-----------------------------------------------------------------------
 * Include     : sci_common.h
 *-----------------------------------------------------------------------
 * Definition  : ER fini_hw(INT) 
 *-----------------------------------------------------------------------
 * Function    : finish "PORT"
 *-----------------------------------------------------------------------
 * Argument    : INT port
 *----------------------------------------------------------------------- 
 * Return      : E_OK
 *-----------------------------------------------------------------------
 * Input       : None 
 * Output      : None 
 *-----------------------------------------------------------------------
 * Used Func   : None 
 *-----------------------------------------------------------------------
 * Notice      : None
 *""FUNC COMMENT END""***************************************************/
EXPORT ER fini_hw(INT port)
{
#ifndef USE_TASKMONITOR
	if(port != 1){
  		REG_SCR(port) = SCR_INIT;
	}
#endif
	return E_OK;
}