Pulse Width Modulator (TCPWM_PWM_PDL) PSoC 6, PSoC Creator 4.2

I see a few options:

1. You can disable multiple instances of the TCPWM using the Disable_Multiple() API, then update the compare/period values of all instances, then enable them using the Enable_Multiple() API

2. You can use DMA to update them. There are two DMA Controllers, so you can update two instances of the TCPWM simultaneously.

To add to RodolfoG_11's points, you can also use "Cy_TCPWM_TriggerReloadOrIndex" API to synchronously reload all the counters of a TCPWM block after you have configured all the PWM's period/duty. Optionally you can use TriggerStop and TriggerStart APIs in conjunction to avoid running a PWM while you are updating others.

muyac_1490236,

Just to clarify one thing, there are only 2 TCPWM blocks in PSoC 6.

>> TCPWM block 0 supports 8 32-bit counters/PWMs.

>> TCPWM block 1 supports 2416-bit counters/PWMs.

Thus PSoC 6 supports up to 32 TCPWM counters (not blocks).

So if you chose only 16-bit PWMs, then all the counters will be placed in TCPWM block 1. If you select 32-bit PWMs, then all gets placed in TCPWM block 0.

I believe by multiple TCPWM blocks, you are referring to multiple TCPWM counters. If that is the case, then all you need to do is make sure all the PWMs are of same resolution (16 or 32-bit) and then use the "Cy_TCPWM_Enable_Multiple(PWM_1_HW, MASK_OF_ALL_PWMS)" where MASK_OF_ALL_PWMS is a logical OR of all the CNT_MASK macros of your PWMs.

Same applies to Trigger APIs.

Let me if this helps.

Regards,

Meenakshi Sundaram R

Yes, this should disable both the counters with a single write (as it is a single register which has the enable bit for all 16-bit counters).

Shouldn't it be a bitwise OR? e.g. Cy_TCPWM_Disable_Multiple(PWM_1_HW, PWM_1_CNT_MASK | PWM_2_CNT_MASK );

A logical OR will return true (1).

Ohh yeah missed to see the ORing in the line. It should '|' and not '||'.

I think I missed one another thing.

Disabling and re-enabling the PWM does not start it. You need to trigger a start signal as well from either software or hardware.

Cy_TCPWM_TriggerStart(PWM_1_HW, PWM_1_CNT_MASK|PWM_2_CNT_MASK);

As I mentioned earlier, you can use this API Cy_TCPWM_TriggerReloadOrIndex(PWM_1_HW, PWM_1_CNT_MASK|PWM_2_CNT_MASK); This API will reload the counters at the same. Equivalent to starting them all at the same time.