topic Re: FTM only complementary reset on request in S32K

FTM only complementary reset on request

pietroserao — Thu, 17 Nov 2016 14:52:06 GMT

Good evening, i have a question.

While i'm using the FTM in complementary mode, only for the complementary pin, during the high period is possible to set in low state until the next duty period only when is needed?

In other words i need to force it in low state the complementary signal only if is needed.

Thank you.

Re: FTM only complementary reset on request

PetrS — Tue, 22 Nov 2016 12:07:35 GMT

Hi,

You can use the Output mask register (OUTMASK) to force channel output to its inactive state through software. As this register is buffered you will need to use register synchronization to update the register with its buffer value. See more in chapter 39.5.13.7 OUTMASK register synchronization.

BR, Petr

Re: FTM only complementary reset on request

pietroserao — Wed, 23 Nov 2016 08:46:43 GMT

Thank you for the answer.

I've solved using a software control. Using the FTM_SWOCTRL register

FTM0->SWOCTRL|=FTM_SWOCTRL_CH7OC(1); // activate the software pin control

FTM0->SWOCTRL|=FTM_SWOCTRL_CH7OCV(0); // set the pin value

FTM0->SWOCTRL|=FTM_SWOCTRL_CH7OC(0); // deactivate the software pin control