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xinjin
xinjin
Associate III
April 15, 2013
Question

How to connect TI1FP1 or TI2FP2?

Posted on April 15, 2013 at 09:53

RM0038: TS: Trigger selection can only selected to TI1FP1 or TI2FP2. However, how to connect this two input to TIM3 CHANNEL 4?

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    4 replies

    waclawek.jan
    waclawek.jan
    Super User
    April 15, 2013
    Posted on April 15, 2013 at 12:44

    Please provide more details on what do you want to achieve.

    JW
    xinjin
    xinjinAuthor
    Associate III
    April 15, 2013
    Posted on April 15, 2013 at 16:26

    I want to use TIM3 CHANNEL4 to measure a PWM signal.

    Tesla DeLorean
    Tesla DeLorean
    Guru
    April 15, 2013
    Posted on April 15, 2013 at 16:59

    What aspects of the signal, how fast?

    You're not going to be able to trigger from that pin, you could however use input compare to measure period and duty.

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    waclawek.jan
    waclawek.jan
    Super User
    April 16, 2013
    Posted on April 16, 2013 at 06:27

    > you could however use input compare

    Clive meant ''input capture''.

    If speed is important (i.e. you need to measure duration of relatively short pulses), you'll read out the captured value as fast as possible. DMA would help in this case. Do you intend to use the remaining channels of this timer for some other purposes, too?

    JW
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