MKW31Z TPM1 PWM not working

microfirm — Thu, 27 Apr 2017 02:14:50 GMT

Here's the code snippet to show that I can get TPM0 channel to output a PWM signal but I can not get the TPM1 to do the same. Inspecting the TPM registers in the debugger shows that TPM1 does not get initialized correctly. What am I doing wrong??

#define PWM5_TIMER_INSTANCE 1
#define PWM5_TIMER_CHANNEL 0

#define PWM4_TIMER_INSTANCE 0
#define PWM4_TIMER_CHANNEL 3

#define PWM_INIT_VAL 0x00
#define PWM_FREQ 25000u

#define M5_PWM_DUTY( x ) PWM_SetChnCountVal( PWM5_TIMER_INSTANCE, PWM5_TIMER_CHANNEL, :smileyx: )
#define M4_PWM_DUTY( x ) PWM_SetChnCountVal( PWM4_TIMER_INSTANCE, PWM4_TIMER_CHANNEL, :smileyx: )

tmr_adapter_pwm_param_t pwm_config;

PWM_Init( PWM5_TIMER_INSTANCE );
PWM_Init( PWM4_TIMER_INSTANCE );

GpioSetPinMux( gpioPort_B_c, 2u, pinMux_Alt5_c ); // PWM5_TPM1_CH0
GpioSetPinMux( gpioPort_C_c, 16u, pinMux_Alt5_c ); // PWM4_TPM0_CH3

/*Configure PWM Module */
pwm_config.initValue = PWM_INIT_VAL;
pwm_config.frequency = PWM_FREQ;

PWM_StartEdgeAlignedLowTrue( PWM5_TIMER_INSTANCE, &pwm_config, PWM5_TIMER_CHANNEL );
PWM_StartEdgeAlignedLowTrue( PWM4_TIMER_INSTANCE, &pwm_config, PWM4_TIMER_CHANNEL );

M5_PWM_DUTY( 0x80 );
M4_PWM_DUTY( 0x80 );

Re: MKW31Z TPM1 PWM not working

microfirm — Thu, 27 Apr 2017 02:35:14 GMT

I found the problem to be the demo code that I based the project on was using TPM1 for the BlueTooth stack timers

Re: MKW31Z TPM1 PWM not working

bigtwisty — Thu, 28 Sep 2017 20:56:34 GMT

How did you solve this? I believe I may be having the same problem with a project based on the demo BLE software. I need all 3 TPMs for this project.

topic MKW31Z TPM1 PWM not working in Kinetis Microcontrollers

MKW31Z TPM1 PWM not working

Re: MKW31Z TPM1 PWM not working

Re: MKW31Z TPM1 PWM not working