EPWM trip zone

Table of Contents

• Introduction
• External Connections
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

The difference could be seen in the waveform generated as shown below. We can see that the for OSHT, as long as we kept clearing the flag (i.e. for 10 times) it recovered. Once loop exits, it goes into permanent trip state.

For CBC as observed at the end, after exiting the loop, it recovers from trip state and goes to active state.

External Connections

Supported Combinations

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
• When the trip input TZ is high, 2 EPWMs generate PWM waveforms.
• When trip input is pulled low , 2 EPWMs gets tripped.

See Also

EPWM

Sample Output

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

EPWM Trip Zone Test Started ...
TZ OST interrupt hit 1 times!!
TZ OST interrupt hit 2 times!!
TZ OST interrupt hit 3 times!!
TZ OST interrupt hit 4 times!!
TZ OST interrupt hit 5 times!!
TZ OST interrupt hit 6 times!!
TZ OST interrupt hit 7 times!!
TZ OST interrupt hit 8 times!!
TZ OST interrupt hit 9 times!!
TZ OST interrupt hit 10 times!!
TZ CBC interrupt hit 1 times!!
TZ CBC interrupt hit 2 times!!
TZ CBC interrupt hit 3 times!!
TZ CBC interrupt hit 4 times!!
TZ CBC interrupt hit 5 times!!
TZ CBC interrupt hit 6 times!!
TZ CBC interrupt hit 7 times!!
TZ CBC interrupt hit 8 times!!
TZ CBC interrupt hit 9 times!!
TZ CBC interrupt hit 10 times!!
EPWM Trip Zone Test Passed!!
All tests have passed!!