Configuating the double sample and double update in every FOC period by using etpu module on MPC5777

[Harry0001]

Hello!I am configuating the double sample and double update in every FOC period by using etpu module,and i set the pwmm_config structure as FS_ETPU_PWMM_FM1_FRAME_AND_CENTER_UPDATE to realize the two updating position. Beyone that,i also set the as_config_t structure of etpu module to  FS_ETPU_AS_FM1_CENTER_PULSE_ON to realize the two triggle time, After that i captured the picture of the oscilloscope about the AS signal and the PWMH signal of V phase of the motor control,and compared them before and after the above setting,however i did not found the correct result,i also attached the two pictures to show that. Please help me to find how to configure the etpu correctly.thanks!

[Yongbing_Nan]

Hi,

If you want to implement double sample, please trying the following AS configuration. Focus on the black bold section below

struct as_config_t as_config =
{
0, /* start_offset */
0, /* period */
USEC2TCR1(5), /* pulse_width */
FS_ETPU_AS_FM0_FRAME_PULSE_ON | FS_ETPU_AS_FM1_CENTER_PULSE_ON, /* pulse_selection */
0, /* pulse_adjustment_frame */
USEC2TCR1(5), /* pulse_adjustment_center */
FS_ETPU_AS_IRQ_FRAME_PULSE_START, /* irq_dma_options */
FS_ETPU_AS_LINK_FRAME_PULSE_END, /* link_options */
0, /* link_chans_frame_start */
...

...
};