static void prvSetupTimerInterrupt( void )
{
WDG_InitTypeDef xWdg;
unsigned short a;
unsigned long n = configCPU_PERIPH_HZ / configTICK_RATE_HZ, b;
/* Configure the watchdog as a free running timer that generates a
periodic interrupt. */
SCU_APBPeriphClockConfig( __WDG, ENABLE );
WDG_DeInit();
WDG_StructInit(&xWdg);
prvFindFactors( n, &a, &b );
xWdg.WDG_Prescaler = a - 1;
xWdg.WDG_Preload = b - 1;
WDG_Init( &xWdg );
WDG_ITConfig(ENABLE);
/* Configure the VIC for the WDG interrupt. */
VIC_Config( WDG_ITLine, VIC_IRQ, 10 );
VIC_ITCmd( WDG_ITLine, ENABLE );
/* Install the default handlers for both VIC's. */
VIC0->DVAR = ( unsigned long ) prvDefaultHandler;
VIC1->DVAR = ( unsigned long ) prvDefaultHandler;
WDG_Cmd(ENABLE);
}
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main()
{
#ifdef DEBUG
debug();
#endif
SCU_MCLKSourceConfig(SCU_MCLK_OSC); /*Use OSC as the default clock source*/
SCU_PCLKDivisorConfig(SCU_PCLK_Div1); /* ARM Peripheral bus clokdivisor = 1*/
WDG_InitTypeDef WDG_InitStructure;
GPIO_InitTypeDef GPIO3_InitStruct;
SCU_APBPeriphClockConfig(__GPIO3, ENABLE);/* Enable the clock for GPIO3*/
GPIO_DeInit(GPIO3);/* GPIO3 default configuration : Reset configuration*/
/* Configure the GPIO3 */
GPIO3_InitStruct.GPIO_Pin= GPIO_Pin_2; /* Choose the pin "P3.2 port"*/
GPIO3_InitStruct.GPIO_Direction=GPIO_PinOutput; /* Choose the P3.2 port Direction "output".*/
GPIO3_InitStruct.GPIO_Type = GPIO_Type_PushPull ;
GPIO3_InitStruct.GPIO_Alternate=GPIO_OutputAlt1;
GPIO_Init(GPIO3,&GPIO3_InitStruct); /*GPIO3 initialization with the previous chosen parameters.*/
GPIO_WriteBit(GPIO3, GPIO_Pin_2, Bit_RESET); /* Reset the P3.2 port " on STR912-SK-IAR Board, LED3 is on "*/
SCU_APBPeriphClockConfig(__WDG, ENABLE); /* Enable the clock for the WDG peripheral*/
WDG_DeInit();/* WDG default configuration : Reset configuration*/
/* Configure the WDG to generate a system reset signal each 1s */
WDG_InitStructure.WDG_Mode = WDG_Mode_Wdg;
WDG_InitStructure.WDG_Preload = 0x7d;
WDG_InitStructure.WDG_Prescaler = 0xFF;
WDG_InitStructure.WDG_ClockSource=WDG_ClockSource_Rtc; /* using the 32khz RTC clock as clock source*/
WDG_Init(&WDG_InitStructure); /* WDG initialization with the previous chosen parameters.*/
while(1)
{
GPIO_WriteBit(GPIO3, GPIO_Pin_2, Bit_SET);
}
}
