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Is a example available for PWM NPWM usage?

MKunz.1
Associate II

Dear

I have configured TIM1 Channel1 as PWM and I would like to use the NPWM feature too.

Therefore I have configuted the channel as PWM NPWM channel and set the according GPIOs.

I must have made a mistake in the MXCube configuration.

The PWM output performs as expected while the NPWM output is always low.

Has anyone a idea what ist wrong?

Best regards

Martin

7 REPLIES 7

What is NPWM?

Read out and check/post the relevant TIM and GPIO registers content.

JW

MKunz.1
Associate II

Dear.

in MXCube you can set the Timer output to PWM and NPWM. NPWM is the inverted PWM. SO the timer generates a PWM signal and the inverted signal. Both signals shall be available at the pins of the CPU.

Best regards

Martin

MKunz.1
Associate II

Configuration TIM1:

TIM1   Internal Clock   TIM1_VS_ClockSourceINT   VP_TIM1_VS_ClockSourceINT

TIM1   PWM Generation CH1 CH1N   TIM1_CH1   PA8

TIM1   PWM Generation CH1 CH1N   TIM1_CH1N   PA11

TIM1   PWM Generation CH2 CH2N   TIM1_CH2   PE11

TIM1   PWM Generation CH2 CH2N   TIM1_CH2N   PA12

TIM1   PWM Generation CH3 CH3N   TIM1_CH3   PA10

TIM1   PWM Generation CH3 CH3N   TIM1_CH3N   PE12

MKunz.1
Associate II

A little more detailed

Configuration of TIM1:

Clock Source : Internal Clock

Channel1: PWM Generation CH1 CH1N

Channel2: PWM Generation CH2 CH2N

Channel3: PWM Generation CH3 CH3N

Counter Settings:

Prescaler (PSC - 16 bits value) 82 *

Counter Mode Up

Dithering Disable

Counter Period (AutoReload Register - 16 bits value ) 100 *

Internal Clock Division (CKD) No Division

Repetition Counter (RCR - 16 bits value) 0

auto-reload preload Enable *

Trigger Output (TRGO) Parameters:

Master/Slave Mode (MSM bit) Disable (Trigger input effect not delayed)

Trigger Event Selection TRGO Reset (UG bit from TIMx_EGR)

Trigger Event Selection TRGO2 Reset (UG bit from TIMx_EGR)

Break And Dead Time management - BRK Configuration:

BRK State Disable

BRK Polarity High

BRK Filter (4 bits value) 0

BRK Sources Configuration

- Digital Input Disable

- COMP1 Disable

- COMP2 Disable

- COMP3 Disable

- COMP4 Disable

- COMP5 Disable

- COMP6 Disable

- COMP7 Disable

Break And Dead Time management - BRK2 Configuration:

BRK2 State Disable

BRK2 Polarity High

BRK2 Filter (4 bits value) 0

BRK2 Sources Configuration

- Digital Input Disable

- COMP1 Disable

- COMP2 Disable

- COMP3 Disable

- COMP4 Disable

- COMP5 Disable

- COMP6 Disable

- COMP7 Disable

Break And Dead Time management - Output Configuration:

Automatic Output State Disable

Off State Selection for Run Mode (OSSR) Disable

Off State Selection for Idle Mode (OSSI) Disable

Lock Configuration Off

DeadTime Preload Disable

Dead Time 0

Asymmetrical DeadTime Disable

Falling Dead Time 0

Clear Input:

Clear Input Source Disable

Pulse On Compare ( Common for Channel 3 and 4 :(

Pulse Width Prescaler 0

Pulse Width 0

PWM Generation Channel 1 and 1N:

Mode PWM mode 1

Pulse (16 bits value) 10 *

Output compare preload Enable

Fast Mode Disable

CH Polarity High

CHN Polarity High

CH Idle State Reset

CHN Idle State Reset

PWM Generation Channel 2 and 2N:

Mode PWM mode 1

Pulse (16 bits value) 0

Output compare preload Enable

Fast Mode Disable

CH Polarity High

CHN Polarity High

CH Idle State Reset

CHN Idle State Reset

PWM Generation Channel 3 and 3N:

Mode PWM mode 1

Pulse (16 bits value) 0

Output compare preload Enable

Fast Mode Disable

CH Polarity High

CHN Polarity High

CH Idle State Reset

CHN Idle State Reset

MKunz.1
Associate II

Two Scope screen shots.

MKunz.1
Associate II
 

Dear JW

I have solved the issue.

Thank you.

Best regards

Martin