AM263Px MCU+ SDK  11.00.00
EPWM XCMP Multiple Edges

Table of Contents

Introduction

EPWM XCMP Multiple Edges

This example uses the ePWM module to generate multiple edges in a pwm cycle.

  • Three instances of epwm have been used to demonstrate the use of XCMP feature.
  • For EPWMx, XCMP feature is disabled and it generates waves with duty cycle of 37.5%
  • For EPWMy, XCMP feature is enabled and the only the ACTIVE set registers are used, duty cycle is 1%.
  • For EPWMz, XCMP feature is enabled and the ACTIVE as well as the three SHADOW set registers are used.
    • Using shadow set 3, waves with duty cycle 50% is generated for 5 cycles for both output channels.
    • Using shadow set 2, waves with duty cycle 0% is generated for 8 cycles for both output channels.
    • Using shadow set 1, waves with duty cycle 20% for channel A and 40% for channel B is generated and this continues.

External Connections

  • For AM263PX-CC or AM261X-SOM
    • EPWM0_A and EPWM0_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM1_A and EPWM1_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM2_A and EPWM2_B pin can be connected to an oscilloscope to view the waveform.
  • For AM263PX-LP
    • EPWM1_A and EPWM1_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM2_A and EPWM2_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM3_A and EPWM3_B pin can be connected to an oscilloscope to view the waveform.
  • For AM261X-LP
    • EPWM2_A and EPWM2_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM3_A and EPWM3_B pin can be connected to an oscilloscope to view the waveform.
    • EPWM4_A and EPWM4_B pin can be connected to an oscilloscope to view the waveform.

AM263PX-CC or AM261X-SOM

When using AM263PX-CC or AM263PX-CC with TMDSHSECDOCK (HSEC180 controlCARD Baseboard Docking Station)

  • Capture waveform on HSEC Pin 49 for epwm0_A
  • Capture waveform on HSEC Pin 51 for epwm0_B
  • Capture waveform on HSEC Pin 53 for epwm1_A
  • Capture waveform on HSEC Pin 55 for epwm1_B
  • Capture waveform on HSEC Pin 50 for epwm2_A
  • Capture waveform on HSEC Pin 52 for epwm2_B

AM263PX-LP

  • Capture waveform on boosterpack header J2/J4 Pin 37 for epwm1_A
  • Capture waveform on boosterpack header J2/J4 Pin 38 for epwm1_B
  • Capture waveform on boosterpack header J2/J4 Pin 39 for epwm2_A
  • Capture waveform on boosterpack header J2/J4 Pin 40 for epwm2_B
  • Capture waveform on boosterpack header J6/J8 Pin 77 for epwm3_A
  • Capture waveform on boosterpack header J6/J8 Pin 78 for epwm3_B

AM261X-LP

  • Capture waveform on boosterpack header J2/J4 Pin 40 for epwm2_A
  • Capture waveform on boosterpack header J2/J4 Pin 39 for epwm2_B
  • Capture waveform on boosterpack header J2/J4 Pin 38 for epwm3_A
  • Capture waveform on boosterpack header J2/J4 Pin 37 for epwm3_B
  • Capture waveform on boosterpack header J2/J4 Pin 36 for epwm4_A
  • Capture waveform on boosterpack header J2/J4 Pin 35 for epwm4_B

Supported Combinations

Parameter Value
CPU + OS r5fss0-0 nortos
Toolchain ti-arm-clang
Board am263px-cc, am263px-lp
Example folder examples/drivers/epwm/epwm_xcmp_multiple_edges

Steps to Run the Example

  • When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
  • When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
  • Establish connections as mentioned in External Connections section
  • Launch a CCS debug session and run the executable, see CCS Launch, Load and Run

See Also

EPWM

Sample Output

Shown below is a sample output when the application is run,

EPWM XCMP multiple edges Test Started ...
EPWM XCMP multiple edges Test Passed!!
All tests have passed!!

EPWM XCMP multiple edges waveform