Posted on October 12, 2006 at 21:40On the STR711FR2, how do I determine a timer prescaler value? I would like
The Reference manual shows a function of
delta_OCiR = (delta_t * f_PCLK2) / (CC7 / CC0 + 1)
Since CC7 and CC0 are bits, do I use the entire CC register as the prescale value?
I currently have the timer running and the interrupts working, but the period of the timer is not what I expect.
Thanks.
//
// Configure the EIC channel interrupt
//
EIC_IRQChannelPriorityConfig( T0TIMI_IRQChannel, 1 );
EIC_IRQChannelConfig( T0TIMI_IRQChannel, ENABLE );
EIC_IRQConfig( ENABLE );
//
// Initialize the Timer
//
TIM_Init ( TIM0 );
//
// Configure the TIM Prescaler - Div by 2
//
TIM_PrescalerConfig ( TIM0, 0x02 ); // ???
//
// Enable the Output Compare for the TIM0 peripheral
//
TIM_ITConfig ( TIM0, TIM_OCA_IT, ENABLE );
//
// Output compare mode peripheral Mode Config
// (TIMx, TIM_CHANNEL_x, Output Compare Value, Output Compare Mode, Level after Match)
//
TIM_OCMPModeConfig ( TIM0, TIM_CHANNEL_A, 0x8000, TIM_TIMING, TIM_HIGH );
[ This message was edited by: justinm on 13-10-2006 01:14 ]
