复位操作
/*
---------------------------------------------------------------
作 者:温子祺
联系方式:[email protected]
说 明:WINCE复位操作
---------------------------------------------------------------
*/
C:\WINCE600\PLATFORM\Mini2440\src\common\ioctl\reboot
源码：
代码
#include
<
oal.h
>
//
------------------------------------------------------------------------------
//
//
Function: OALIoCtlHalReboot
//
//
BOOL OALIoCtlHalReboot(UINT32 code, VOID
*
pInpBuffer,
UINT32 inpSize, VOID
*
pOutBuffer,
UINT32 outSize, UINT32
*
pOutSize)
{
//
//
If the board design supports software-controllable hardware reset logic, it should be
//
used. Because this routine is specific to the S3C2440A CPU, it only uses the watchdog
//
timer to assert reset. One downside to this approach is that nRSTOUT isn't asserted
//
so any board-level logic isn't reset via this method. This routine can be overidden in
//
the specific platform code to control board-level reset logic, should it exist.
//
volatile
S3C2440A_WATCHDOG_REG
*
pWDRegs
=
(
volatile
S3C2440A_WATCHDOG_REG
*
)
OALPAtoVA(S3C2440A_BASE_REG_PA_WATCHDOG, FALSE);
OALMSG(OAL_IOCTL
&&
OAL_FUNC, (L
"
+OALIoCtlHalReboot\r\n
"
));
//
Setup the watchdog.
//
pWDRegs
->
WTDAT
=
0
;
pWDRegs
->
WTCNT
=
5
;
//
Load count with low value.
pWDRegs
->
WTCON
=
0x8021
;
//
Enable watchdog timer...
//
Wait for watchdog reset...
//
while
(TRUE);
//
Should never get to this point...
//
OALMSG(OAL_IOCTL
&&
OAL_FUNC, (L
"
-OALIoCtlHalReboot\r\n
"
));
return
(TRUE);
}
在OALIoCtlHalReboot函数中，复位操作很简单，只需要对看门狗相关的寄存器进行配置，然后等待看门狗计数器溢出，看门狗就会复位ARM。
OALIoCtlHalReboot输入参数如下：
- code
-
[in] Set to IOCTL_HAL_REBOOT to support a warm boot of the target device.
- pInpBuffer
-
[in] Not used; set to NULL.
- inpSize
-
[in] Not used; set to zero.
- pOutBuffer
-
[in] Ignored; set to NULL.
- outSize
-
[in] Not used; set to zero.
- pOutSize
-
[in] Not used; may be set to NULL.
即OALIoCtlHalReboot(IOCTL_HAL_REBOOT,NULL,0,NULL,0,NULL);
转载请注明出处，谢谢！