// Helper: set timer clock
static u32 platform_timer_set_clock( unsigned id, u32 clock )
{
u32 baseclk = SCU_GetPCLKFreqValue() * 1000;
TIM_TypeDef* base = ( TIM_TypeDef* )timer_data[ id ];
u64 bestdiv;
bestdiv = ( ( u64 )baseclk << 16 ) / clock;
if( bestdiv & 0x8000 )
bestdiv += 0x10000;
bestdiv >>= 16;
if( bestdiv > 256 )
bestdiv = 256;
TIM_PrescalerConfig( base, bestdiv - 1 );
return baseclk / bestdiv;
}
/*******************************************************************************
* Function Name : UART_IrDASetCounter
* Description : Sets the IrDA counter divisor value.
* Input : - UARTx: where x can be 0,1 or 2 to select the UART/IrDA peripheral.
* - IrDA_Counter: IrDA counter divisor new value n low power mode(Hz).
* Output : None
* Return : None
*******************************************************************************/
void UART_IrDASetCounter(u8 IrDAx, u32 IrDA_Counter)
{
UART_TypeDef* UARTx;
u32 APBClock;
switch(IrDAx)
{
case IrDA0: UARTx = UART0;
break;
case IrDA1: UARTx = UART1;
break;
case IrDA2: UARTx = UART2;
break;
}
/* Get the APB frequency */
APBClock = (SCU_GetPCLKFreqValue())*1000;
/* Determine the Counter Divisor part */
UARTx->ILPR = (((APBClock*10) / ( IrDA_Counter)) + 5 )/10;
}
//----------------------------------------------------------------------------------------------------
// 1ms Timer
//----------------------------------------------------------------------------------------------------
void TIMER1_Init(void)
{
TIM_InitTypeDef TIM_InitStructure;
UART1_PutString("\r\n Timer1 init...");
#define TIM1_FREQ 200000 // 200kHz
// TimerOCR set in IntHandler
SCU_APBPeriphClockConfig(__TIM01, ENABLE);
TIM_DeInit(TIM1);
TIM_StructInit(&TIM_InitStructure);
TIM_InitStructure.TIM_Mode = TIM_OCM_CHANNEL_1;
TIM_InitStructure.TIM_OC1_Modes = TIM_TIMING;
TIM_InitStructure.TIM_Clock_Source = TIM_CLK_APB;
TIM_InitStructure.TIM_Prescaler = (SCU_GetPCLKFreqValue() * 1000) / TIM1_FREQ; // is only valid up to 48 MHz !
TIM_Init (TIM1, &TIM_InitStructure);
TIM_ITConfig(TIM1, TIM_IT_OC1, ENABLE);
TIM_CounterCmd(TIM1, TIM_START);
VIC_Config(TIM1_ITLine, VIC_IRQ, PRIORITY_TIMER1);
VIC_ITCmd(TIM1_ITLine, ENABLE);
SystemTime.Year = 0;
SystemTime.Month = 0;
SystemTime.Day = 0;
SystemTime.Hour = 0;
SystemTime.Min = 0;
SystemTime.Sec = 0;
SystemTime.mSec = 0;
SystemTime.Valid = 0;
CountMilliseconds = 0;
UART1_PutString("ok");
}
// Helper: get timer clock
static u32 platform_timer_get_clock( unsigned id )
{
return ( SCU_GetPCLKFreqValue() * 1000 ) / ( TIM_GetPrescalerValue( ( TIM_TypeDef* )timer_data[ id ] ) + 1 );
}
