RM0033 Rev 9 341/1381
RM0033 Advanced-control timers (TIM1 and TIM8)
375
Figure 106. Example of counter operation in encoder interface mode.
Figure 107 gives an example of counter behavior when TI1FP1 polarity is inverted (same
configuration as above except CC1P=’1’).
Figure 107. Example of encoder interface mode with TI1FP1 polarity inverted.
The timer, when configured in Encoder Interface mode provides information on the sensor’s
current position.The user can obtain dynamic information (speed, acceleration,
deceleration) 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 times. This can be done by latching the counter value into a third
input capture register if available (then the capture signal must be periodic and can be
generated by another timer). when available, it is also possible to read its value through a
DMA request generated by a real-time clock.
TI1
backwardjitter jitter
up down up
TI2
Counter
forward forward
MS33107V1
TI1
backwardjitter jitter
updown
TI2
Counter
forward forward
MS33108V1
down
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