i.MX8M Safety Example
NXP Semiconductors
Document identifier: IEC60730BIMX8MXEUG
User's Guide
Rev. 3, 07/2021
Page 1: ...i MX8M Safety Example NXP Semiconductors Document identifier IEC60730BIMX8MXEUG User s Guide Rev 3 07 2021...
Page 2: ...guide 3 Chapter 2 Hardware settings 4 Chapter 3 File structure 7 Chapter 4 Example application 9 Chapter 5 Running example 14 Chapter 6 IEC60730B tests 22 Chapter 7 Revision history 25 NXP Semiconduc...
Page 3: ...gh the MCUXpresso SDK website This example user s guide describes how to set the hardware correctly and how to use the example code with the IEC60730B Safety library The library user s guide is the ma...
Page 4: ...bugger The default debugger in the example project is set to J Link FreeMASTER FreeMASTER communication is used via an external J Link plugin The hardware settings are as follows 1 Connect the 12 V po...
Page 5: ...he 12 V power supply J302 USB port and the J Link debug probe to the board and switch the SW101 switch to power on the board 2 Connect a USB C cable between the host PC and the J301 USB port this port...
Page 6: ...Figure 2 Hardware connection of EVK MIMX8MN EVK MIMX8MN Nano i MX8M Safety Example Rev 3 07 2021 NXP Semiconductors 6...
Page 7: ...tains the source files for the peripheral test this is a common cross core These tests are compiled to library libIEC60730B_ core _COM_ compiler _ version a The compiler folder contains compiler suppo...
Page 8: ...gure 4 Figure 4 Example of project structure in example folder This folder contains the example source file and three folders for the IDE project file iar mcux mdk The following files are generated by...
Page 9: ...K library and safety example related folders The safety related folders are the following Board this folder contains the files related to the board used clock_config h pin_config h board h and so on C...
Page 10: ...t The project_setup_ your_board c file contains the setup functions clock port UART and so on The file contains the handling function for safety routines from the IEC60730B library and also the test i...
Page 11: ...the Device Manager Two new COM ports should appear Open both COM ports in the serial terminal with settings mentioned above The COM port with the higher number shows the output of the bootloader The o...
Page 12: ...size 256 Bytes erase size 4 KiB total 32 MiB SF 20480 bytes 0x0 Erased OK device 0 offset 0x0 size 0x4864 SF 18532 bytes 0x0 Written OK The image is now downloaded into the QSPI flash Turn the board o...
Page 13: ...test The file contains the fs_dio_test_ platform _t list of structures The pointers to these structures are collected in the dio_safety_test_items array which is used in the example application 4 5 So...
Page 14: ...e post build command calls the crc hex bat file which supports the CRC16 and CRC32 calculations The crc hex bat file is in your SDK package in the sdk_package middleware safety_iec60730b tools crc fol...
Page 15: ...ipt The linker script depends on the IDE used The exact description for the supported IDE is in the following chapter 5 1 2 Arm uVison Keil IDE postbuild CRC The safety example in the uVision Keil use...
Page 16: ...This command loads the YOUR_PROJECT _crc hex file from the debug relative path and this address is relative to the project file YOUR_PROJECT uvprojx in the presented case It means that the file is in...
Page 17: ...d steps Post build steps menu Copy and paste the following post build string into it arm none eabi objcopy v O ihex BuildArtifactFileName BuildArtifactFileBaseName hex ProjDirPath crc_hex bat ConfigNa...
Page 18: ...table can be defined as the following structure The safety related FLASH CRC value fs_crc_t c_sfsCRC __attribute__ used section flshcrc ui16Start 0xA55AU ui32FlashStart uint32_t __ROM_start__ ui32Fla...
Page 19: ...ile 5 1 3 3 Flash loader configuration It is necessary to set a correct output file for the download to the target There are the following two ways to do this in the MCUXpresso IDE 1 Using the Debug c...
Page 20: ...g GUI Flash Tool Only the SEGGER J Link probes in the GUI Flash Tool support hex files In the GUI Flash Tool settings select Workspace Configuration PROJECT_NAME _crc hex file for download Post build...
Page 21: ...Figure 6 GUI Flash Tool SEGGER J Link Post build CRC calculation i MX8M Safety Example Rev 3 07 2021 NXP Semiconductors 21...
Page 22: ...re tests all CPU registers for the stuck at condition except for the program counter register The program counter test is implemented as a stand alone safety routine Some tests stay in an endless loop...
Page 23: ...by the MarchC or MarchX tests The test copies a block of memory to the backup area defined by the linker Be sure that the BLOCK_SIZE parameter is smaller than the backup area defined by the linker Th...
Page 24: ...Some debuggers do not allow the WDOG reset Due to this it is necessary to turn off the WDOG when debugging the application NOTE Watchdog test i MX8M Safety Example Rev 3 07 2021 NXP Semiconductors 24...
Page 25: ...er SDK Description 0 2 9 0 Intial release 1 2 10 0 Change devices supported in SDK rel 2 10 2 2 10 0 Post build description added 3 Version cover SDK 2 9 and SDK 2 10 release document for web NXP Semi...
Page 26: ...ould implement appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP the NXP logo NXP SECURE CONNECTIONS FOR A SMARTER WORLD COOLFLUX EM...
