5.9. CPU Safety Example¶
5.9.1. Introduction¶
This example demonstrates the usage of the R5F_CPU for R5F Lockstep as a safety mechanism to detect errors in R5F execution. Examples show how to configure and use all 4 modes and also show how to configure PMU,MPU and illegal instruction trapping.
The example demonstrates:
Setting R5F Lockstep mode
Usage of Compute Compare Module (CCM) and use all 4 modes Compare active block, Self test, Error forcing, Self test error forcing using CPU output compare function mode.
Usage of MPU in different regions & Usage of three PMU Registers for event Monitring .
5.9.2. Use Cases¶
Use Case
Description
ESM
UC-1
The R5F_CPU is programmed with R5F Lockstep mode and Usage of Compute Compare Module(CCM) and use all 4 modes. Usage of MPU to configure the different regions and Usage of three PMU Registers for event Monitring.
MCU_ESM0
5.9.3. Example Details¶
The example should be loaded to the hardware using the Secondary Boot Loader (SBL) from the SDK.
Example Name |
Location |
Build Command |
|---|---|---|
cpu_app |
[sdl_install_dir]/examples/cpu/ |
make cpu_app PROFILE=release |
5.9.4. Expected Output¶
R5 CPU Application
ESM Call back function called : instType 0x2, intType 0x1, grpChannel 0x3, index 0x0, intSrc 0x60
Take action
R5F-CPU example application CCM_Test_init: Init MCU ESM complete
R5F-CPU example application CCM_Test_init: Init MAIN ESM complete
R5F-CPU example application CCM_Test_init: Init WKUP ESM complete
CCM_Test_init: CCM Init complete
R5F-CPU example application CCM_Test_init: CCM Init complete
CCM Functional Test
R5F-CPU example application CCM_Test_init: Init MCU ESM complete
R5F-CPU example application CCM_Test_init: Init MAIN ESM complete
R5F-CPU example application CCM_Test_init: Init WKUP ESM complete
CCM_Test_init: CCM Init complete
R5F-CPU example application CCM_Test_init: CCM Init complete
R5F-CPU example application CCM self test: starting
R5F-CPU example application CCM Self Test complete
R5F-CPU example application CCM self test with error forcing: starting
ESM Call back function called : instType 0x2, intType 0x1, grpChannel 0x3, index 0x0, intSrc 0x60
Take action
R5F-CPU example application CCM Self Test with error forcing complete
R5F-CPU example application CCM inject error: test starting
ESM Call back function called : instType 0x2, intType 0x1, grpChannel 0x3, index 0x0, intSrc 0x60
Take action
ESM Call back function called : instType 0x2, intType 0x1, grpChannel 0x3, index 0x1, intSrc 0x61
Take action
R5F-CPU example application CCM inject Test complete
R5F-CPU example application MPU self test for Mem Write Access Fault: starting
R5F-CPU example application MPU self test for Mem Write Access Fault complete
Cycles taken 11571
R5F-CPU example application MPU self test for Mem Read Access Fault: starting
R5F-CPU example application MPU self test for Mem Read Access Fault complete
Cycles taken 5844
R5F-CPU example application MPU self test for Mem Write Access Fault (Wait Forever): starting
R5F-CPU example application MPU self test for Mem Write Access Fault (Wait Forever) complete
Cycles taken 4718
R5F-CPU example application MPU self test for Mem Read Access Fault (Wait Forever): starting
R5F-CPU example application MPU self test for Mem Read Access Fault (Wait Forever) complete
Cycles taken 4642
CPU Functionality Passed.
All tests have passed.
main.c:239:test_sdl_cpu_test_app:PASS
-----------------------
1 Tests 0 Failures 0 Ignored
OK