Reset Isolation - MCU Domain

Table of Contents

• Introduction
• Supported Combinations
• Steps
• Sample Output

Introduction

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 the MCU M4 and the Main domain R5 logs a heartbeat message to the Main UART and MCU UART respectively.

On pressing the SOC Warm reset button (SW4) or GPIO SW5, the MCU M4 which is reset isolated will keep on running, and the Main domain R5 will undergo a warm reset. On reset the SBL would not reload the M4 core again.

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
	m4fss0-0 nortos
Toolchain	ti-arm-clang
Board	am64x-evm
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,

################################ R5 Log #######################################
 
DMSC Firmware Version 8.5.1--v08.05.01 (Chill Capybar
DMSC Firmware revision 0x8
DMSC ABI revision 3.1
 
[BOOTLOADER_PROFILE] Boot Media       : NOR SPI FLASH
[BOOTLOADER_PROFILE] Boot Media Clock : 166.667 MHz
[BOOTLOADER_PROFILE] Boot Image Size  : 54 KB
[BOOTLOADER_PROFILE] Cores present    :
m4f0-0
r5f0-0
[BOOTLOADER PROFILE] SYSFW init                       :      12234us
[BOOTLOADER PROFILE] System_init                      :      39699us
[BOOTLOADER PROFILE] Drivers_open                     :        268us
[BOOTLOADER PROFILE] Board_driversOpen                :      21928us
[BOOTLOADER PROFILE] Sciclient Get Version            :      10023us
[BOOTLOADER PROFILE] CPU Load                         :     108445us
[BOOTLOADER_PROFILE] SBL Total Time Taken             :     192602us
 
Image loading done, switching to application ...
Starting R5
Press and release SW5 button on EVM to trigger warm reset from SW...
Press and release SW4 button on EVM to trigger a warm reset from HW..
 
I am running (R5) !!:- 0
I am running (R5) !!:- 1
I am running (R5) !!:- 2
I am running (R5) !!:- 3
I am running (R5) !!:- 4
I am running (R5) !!:- 5
I am running (R5) !!:- 6
I am running (R5) !!:- 7
I am running (R5) !!:- 8
I am running (R5) !!:- 9
 
DMSC Firmware Version 8.5.1--v08.05.01 (Chill Capybar
DMSC Firmware revision 0x8
DMSC ABI revision 3.1
 
[BOOTLOADER_PROFILE] Boot Media       : NOR SPI FLASH
[BOOTLOADER_PROFILE] Boot Media Clock : 166.667 MHz
[BOOTLOADER_PROFILE] Boot Image Size  : 30 KB
[BOOTLOADER_PROFILE] Cores present    :
r5f0-0
[BOOTLOADER PROFILE] SYSFW init                       :      33157us
[BOOTLOADER PROFILE] System_init                      :      40541us
[BOOTLOADER PROFILE] Drivers_open                     :        268us
[BOOTLOADER PROFILE] Board_driversOpen                :      21928us
[BOOTLOADER PROFILE] Sciclient Get Version            :      10028us
[BOOTLOADER PROFILE] CPU Load                         :      90278us
[BOOTLOADER_PROFILE] SBL Total Time Taken             :     196205us
 
Image loading done, switching to application ...
Starting R5
Press and release SW5 button on EVM to trigger warm reset from SW...
Press and release SW4 button on EVM to trigger a warm reset from HW..
 
I am running (R5) !!:- 0
I am running (R5) !!:- 1
I am running (R5) !!:- 2
I am running (R5) !!:- 3
I am running (R5) !!:- 4
I am running (R5) !!:- 5
 
##############################################################################
 
 
################################ M4 Log #######################################
 
I am running (M4) !!:- 0
I am running (M4) !!:- 1
I am running (M4) !!:- 2
I am running (M4) !!:- 3
I am running (M4) !!:- 4
I am running (M4) !!:- 5
I am running (M4) !!:- 6
I am running (M4) !!:- 7
I am running (M4) !!:- 8
I am running (M4) !!:- 9
I am running (M4) !!:- 10
I am running (M4) !!:- 11
I am running (M4) !!:- 12
I am running (M4) !!:- 13
I am running (M4) !!:- 14
I am running (M4) !!:- 15
I am running (M4) !!:- 16
I am running (M4) !!:- 17
I am running (M4) !!:- 18
I am running (M4) !!:- 19
I am running (M4) !!:- 20
 
##############################################################################