STM8S datasheet(187/467 Pages) STMICROELECTRONICS

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RM0016

16-bit advanced control timer (TIM1)

261

When the timer is configured in encoder interface mode, it provides information on the

current position of the sensors. Dynamic information, such as speed, acceleration, and

slowdown, can be obtained by measuring the period between two encoder events using a

second timer configured in capture mode. The output of the encoder, which indicates the

mechanical zero, can be used for this purpose. Depending on the time between two events,

the counter can also be read at regular intervals. This can be done by latching the counter

value into a third input capture register, if one is available. In this case, the capture signal

must be periodic and can be generated by another timer.

17.6

TIM1 interrupts

TIM1 has eight interrupt request sources, mapped on 2 interrupt vectors:

•

Break interrupt

•

Trigger interrupt

•

Commutation interrupt

•

Capture/compare 4 interrupt

•

Capture/compare 3 interrupt

•

Capture/compare 2 interrupt

•

Capture/compare 1 interrupt

•

Update interrupt (example: overflow, underflow, and counter initialization)

To use the interrupt features for each interrupt channel used, set the desired interrupt

enable bits (BIE, TIE, COMIE, CCiIE, and UIE) in the TIM1_IER register to enable interrupt

requests.

The different interrupt sources can also be generated by software using the corresponding

bits in the TIM1_EGR register.

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