Reset Isolation - MCU Domain

Table of Contents

• Introduction
• Supported Combinations
• Steps
• Sample Output

Introduction

Attention

Data isolation between MCU to Main/DM is not supported yet. Only the reset isolation is supported.

The example demonstrates the MCU reset isolation in the use case when the MCU domain is running a safety application.

The example can be run in OSPI boot mode. On running the application, MCU M4 and WKUP R5 logs a heartbeat message to the MCU UART and WKUP UART respectively.

On pressing the SOC Warm reset button (SW3), the MCU M4 which is reset isolated will keep on running, and the Main domain will undergo a warm reset. On reset the SBL would not reload the M4 core again.

Supported Combinations

Parameter	Value
CPU + OS	m4fss0-0 nortos
	r5fss0-0 freertos
Toolchain	ti-arm-clang
Board	am62x-sk, am62x-sip-sk
Example folder	examples/drivers/safety/reset_isolation

Steps

• 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

Sample Output

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

################################ Wakeup R5 Log #######################################
Sciserver Testapp Built On: Jan 17 2023 16:45:20
Sciserver Version: v2023.01.0.0-REL.MCUSDK.08.06.00.01+
RM_PM_HAL Version: REL.MCUSDK.08.06.00.01
Starting Sciserver..... PASSED
GTC freq: 200000000
I am running (WKUP R5) !!:- 0
I am running (WKUP R5) !!:- 1
I am running (WKUP R5) !!:- 2
I am running (WKUP R5) !!:- 3
I am running (WKUP R5) !!:- 4
I am running (WKUP R5) !!:- 5
I am running (WKUP R5) !!:- 6
I am running (WKUP R5) !!:- 7
I am running (WKUP R5) !!:- 8
I am running (WKUP R5) !!:- 9
Sciserver Testapp Built On: Jan 17 2023 16:45:20
Sciserver Version: v2023.01.0.0-REL.MCUSDK.08.06.00.01+
RM_PM_HAL Version: REL.MCUSDK.08.06.00.01
Starting Sciserver..... PASSED
GTC freq: 200000000
I am running (WKUP R5) !!:- 0
I am running (WKUP R5) !!:- 1
I am running (WKUP R5) !!:- 2
I am running (WKUP R5) !!:- 3
I am running (WKUP R5) !!:- 4
I am running (WKUP R5) !!:- 5
I am running (WKUP R5) !!:- 6
I am running (WKUP R5) !!:- 7
I am running (WKUP R5) !!:- 8
I am running (WKUP R5) !!:- 9
I am running (WKUP R5) !!:- 10
 
 
################################ M4 Log #######################################
I am running (MCU M4) !!:- 0
I am running (MCU M4) !!:- 1
I am running (MCU M4) !!:- 2
I am running (MCU M4) !!:- 3
I am running (MCU M4) !!:- 4
I am running (MCU M4) !!:- 5
I am running (MCU M4) !!:- 6
I am running (MCU M4) !!:- 7
I am running (MCU M4) !!:- 8
I am running (MCU M4) !!:- 9
I am running (MCU M4) !!:- 10
I am running (MCU M4) !!:- 11
I am running (MCU M4) !!:- 12
I am running (MCU M4) !!:- 13
I am running (MCU M4) !!:- 14
I am running (MCU M4) !!:- 15
I am running (MCU M4) !!:- 16
I am running (MCU M4) !!:- 17
I am running (MCU M4) !!:- 18
I am running (MCU M4) !!:- 19
I am running (MCU M4) !!:- 20
I am running (MCU M4) !!:- 21