SDL MCU VTM RESET

Table of Contents

• Introduction
  • Use Cases
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example demonstrates the usage of the VTM to detect Max temperature out of range event and trigger SoC reset. The example shows how to configure the VTM for the thresehold temperature and enabling the max temperature out of range event.

The example demonstrates the following, in sequence:

• Configuring the VTM max temperature threshold and enabling the event
• Waiting for rise in temperature, caused by idle running or external influence
• Max temperature out of range detection
• Triggering of SoC reset by VTM module alert
• Detection that thermal reset of SoC had occurred, after cooling down
• Follow-up disabling of max temp out of range event

Use Cases

Use Case	Description
UC-0	Configuration of VTM threshold to trigger SoC reset, then after cooldown, disable max temp out of range event.

Supported Combinations

Parameter	Value
CPU + OS	mcu-r5fss0-0 nortos
Toolchain	ti-arm-clang
Board	am62dx-evm
Example folder	examples/sdl/vtm/

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)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
• After SoC reset, run the program again

See Also

VTM

Sample Output

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

VTM Example Application
 
Starting Use Case 0
 
VTM_config: starting test with threshold change
sensor id                       : 0
temp in milli degree celcius    : 44754
sensor id                       : 0
temp in milli degree celcius    : 46796
sensor id                       : 0
temp in milli degree celcius    : 47247
sensor id                       : 0
temp in milli degree celcius    : 46796
sensor id                       : 0
temp in milli degree celcius    : 46796
 
VTM_triggerTh: Setting high temp to 48247 millidegrees Celsius
VTM_triggerTh: Setting low temp to 47297 millidegrees Celsius
 
Finished VTM threshold setting
 
Now waiting for thermal reset...
temp in milli degree celcius    : 47247
temp in milli degree celcius    : 46796
temp in milli degree celcius    : 47247
temp in milli degree celcius    : 46570
temp in milli degree celcius    : 47021
temp in milli degree celcius    : 47472
temp in milli degree celcius    : 47247
temp in milli degree celcius    : 47247

Note that at this point in the execution, the high temperature threshold was achieved. This triggered an SoC reset (and in turn, a target disconnection if connected via CCS). After a small wait to cool down the SoC, if the example is run again, the following logs will be obtained.

VTM Example Application
 
Reset source was thermal.
VTM Maximum Temperature Outrange Alert disabled.
VTM Reset Example Application completed successfully.
 
VTM Reset Example Application summary
-------------------------------
Completed 1 Test Case(s)
 
VTM Reset Example Application: Complete
All tests have passed.