Oleg Kokorin

Revise toolchain build scripts, update package versions, and resolve dependencies for the buildroot tree. Debug and enhance MTD uboot/kernel subsystem recovery support. Port rockchip support for libdrm, implementing meson cross-compilation configuration and migrating from Python 2 to Python 3. Address kernel boot freeze, patch DTS with unlocking clause, and backport dwc/rockchip PCIE-bus driver from 5.x to 4.x kernel. Investigate CSI camera viewfinder software stack requirements and troubleshoot Linux kernel eSata subsystem sleep/wakeup issues. Additionally, migrate a Gentoo-based build system to Yocto, transition sysvinit applications/daemons to systemd, and implement remote control unit firmware detection/upgrade. Conduct Broadcom chipset BSP GPIO configuration debugging. Proficient in Ubuntu/Gentoo/Yocto Linux, Broadcom ARM SoC, eSata, Docker, systemd, Git, GitLab, Jira, CLion, Sublime, Confluence, GCC, GDB, Python 3, Devtool, Bitbake, Repo, Vim, Emacs, Meld, GitHub, pipelines, CI/CD.

Schneider Electric, Honeywell, NXP, Intel, ST Micro, Silicon Labs, Philips Semi, Texas Instruments, Samsung Electronics projects participation experience. Linux based devenv Gentoo, Debian, Ubuntu, Yocto, Buildroot, Docker, VmWare, VirtualBox based. Eclipse, CLion, VIM, EMacs development editors. Intel, Xilinx, STMicro, Renesas, Silicon Labs, TI, Rockchip chipset experience. VHDL,Python,C,C++,bash,make,cmake languages. USB, UART, BLE, spi, 1-wire, i2s, i2c, MDIO, SDIO, GPIO, PWM, RTC, DSI, CSI, LVDS, SATA, SCSI, 1394/FireWire, PCMCIA, ExpressCard, JTAG, CAN, NIC interfaces

Worked on an industrial IoT autonomous system where I ported and fine-tuned the DTS for a custom board and re-architected legacy super-loop firmware into a clean, multi-threaded, event-driven structure. I designed a DMA-driven dual-thread AT command parser with event-based post-processing, and integrated BLE functionality using SIMCOM A7672 — supporting both Microchip and Nordic proprietary services. I also handled NMEA GNSS data parsing and exposed location data over BLE using custom GATT navigation characteristics. For user interaction, I built a terminal-style command-line interface accessible via BLE.

freertos multi thread software architecture. dac/adc DMA based data processing. bootloader, power management, hysteresis based pwm with active feedback closed loop. USB acm command line. internal flash data logger and firmware upgrade. stm32L4 series.

Adapting Yocto-based firmware recipes from Rocko to Dunfell, migrating Linux 4.9 patches/drivers to 5.4, and troubleshooting TPM system drivers/libraries/applications. Transitioning SysVInit applications/daemons to systemd, addressing an out-of-memory issue with 25% RAM availability, and analyzing core dumps. Implementing cybersecurity iptables rules patches, debugging Linux 5.4 MTD drivers, and backporting QEMU usability for specific kernel versions. Proficient in Ubuntu/Debian/Yocto Linux, Renesas ARM RZN1, MTD, TPM, Docker, systemd, Git, GitLab, Jira, CLion, Sublime, Confluence, GCC, GDB, Python3, Devtool, BitBake, Repo, Vim, Emacs, Meld, GitHub, CI/CD pipelines

Create and optimize software functionality for NXP iMX6 Yocto Linux systems, incorporating BLE GATT profile command handling using bluez5 for iOS and Android clients. Develop firmware for NXP JN516x for BLE, ZigBee, and 6LoWPAN communication. Port lower power applications to STM32L4 with FreeRTOS. Backport/embed Yocto recipes for Linux compatibility. Construct a multithreaded C++ application with MQTT and ZMQ brokers for inter-thread and inter-process communication. Debug serial-based microcontroller interconnectivity, firmware upgrades (OTG), and BLE emission region specifics.

Provide support for the integration of hardware in an acoustic laboratory. Develop USB device descriptors to enable multichannel constant audio streaming for playback and recording. Implement hardware support for the iMXRT10xx series using DMA for storage, audio, and memory management. Optimize threading and performance in Amazon FreeRTOS.

Fix and implement Yocto Linux recipes, focusing on encrypted boot/rootfs filesystem images, Python, and 3rd party library packages for various product targets. Integrate FPGA bitstreams and DSP firmware, and debug board interfaces. Develop Linux kernel IIO drivers, BSP, device-tree pinmux, and interface mapping. Implement Python-based event-driven UI with AVR, audio resampler, and Hayes commands parser for voice events/messages playback. Engage in OpenWRT/LEDE-based SOHO router software development and BSP integration. Validate software for Silabs EFM8 MCU and conduct Broadcom SoC hardware design and software integration. Configure Docker for the Linux toolchain and assist in Broadcom BSP compilation. Conduct reverse engineering of XML Schema for existing configurations and future data management with TR-069.

nuttx and Linux flight stack. lidar and multi camera CV for objects/obstacles proximity. Xilinx FPGA, VHDL, drivers, IMU modules electronic design supervision/management. Accel, gyro, compas, gnss components evaluation/drivers implementation.

Support the design, development, and porting of Arduino, Yocto, and Android build systems BSP. Implement a Cordova UI-based IoT peripherals management interface. Validate and support IoT SoC (D2000/Atlas) BSP using Python-based validation scripts and C code test cases. Conduct validation of X86 and MIPS dual-core shared peripherals SoC, including driver development and BSP debugging/enhancement. Port and debug Linux kernel GPIB modules, perform oscilloscope signal level validation, and validate logic analyzer interfaces. Address power management, RTC, Always-On GPIO, interrupt controller, slow down clocking timing adjustment, and various communication interfaces (SPI, I2C, UART, PWM, I2S, Maxim 1wire). Integrate RTOS services, validate CPLD XC95xxXL based IO RTL, and write Python verification scripts. Utilize tools such as Linux Fedora, Eclipse, Python (pyserial, nanpy, pyvisa, nose, matplot, scipy), ThreadX, Xilinx ISE, VHDL, GIT, Gerrit, avrdude, bitbake, repo, xc3sprog, iMpact, oscilloscope, and logic analyzer.

Research/Science: Analyze Engine Control Unit (ECU) algorithms to minimize fuel consumption. Fed Matlab with vehicle routing telemetry data to improve algorithms based on real roads experience. Record real-time data on camshaft ahead angle, air pressure, position, temperature, and humidity for algorithm optimization. Measure exhaust gasses nitrogen mixture for optimal CO reduction. Hybrid cars fuel cycle and battery charge balancing. Design/Development/Porting: Integrate software and pcores for Xilinx Virtex/Spartan/Zynq running Microblaze, ThreadX, TrustZone, ARM, and PowerPC. Research platform portability to migrate the existing automotive stack to PowerPC for performance comparison. Optimize interrupt handling latency for smooth system response, especially for automotive CAN Flexray data rate and large data support. Design, implement, and port VHDL/Verilog-based drivers for Xilinx FPGA Autosar, covering various peripheral interfaces. Assist in high-level PCB layout design, including elements embedding and ensuring radio interference respect.

Developed UIQ/S60 viewfinder, incorporating DSP functionality. Architected boot-time device-tree like hardware autodetection and profiling based on common sensors information database, configuring board-dependent settings, and camera and flash-light configuration pickup.Addressed i2c/CSI protocol issues related to speed and platform initialization system. Ported FAT32 filesystem support for SD/MMC card readers. Mitigated DSP/IRP interference through firmware multiversion configuration, traces/logs automated decoding script, dynamic bootloader memory allocation, and config-dependent IRP multiboot.

Designed a common driver architecture for the cameras and ported for Toshiba TCM8230 and Omnivision OV7660. Formulated universal requirements for optimizing performance in mobile cameras. Designed a versatile API supporting linear, circular, and double-buffer functionalities for 4905/4701 DSPs. Engineered a camera protocol URI parser for the mobile multimedia interface. Created an audio mono/stereo resampler for the 4905 DSP operating in the 8-48KHz range.

Developed and debugged a DSP integration environment, creating a bit-compatible simulation for data processing. Designed and implemented a configuration management utility for Atmosphere batch and debug modes, along with an execution helper. Established an export configuration system with a DSP execution parser. Implemented an ARM to DSP DMA-based playback/recording loop-buffer with an interrupt-handling triggered refill mechanism. This mechanism supports dynamic TDMA-based input data with an adjustable frame counter for input/output operations.

Designed, developed, and debugged audio path validation environment, enhancing BSP with audio multi-channels commutation and redirection. Participated in OMAP Linux/Nucleus port integration, CCS setup. Successfully created and delivered a fully firmware Obigo framework based, including (SMS, MMS, EMS) ARM7 running Nucleus OS. Contributed to the porting u-boot OMAP family boards. Assisted in integrating and debugging the Obigo framework into the Nucleus RTOS platform. Conducted extensive debugging, performance research, and power consumption optimization activities.

Developed codecs with dynamic image rescaling for Nucleus mobile RTOS. Addressed critical issues, including debugging a JPEG decoding crash. Researched and outlined a mobile cross-platform migration procedure and Qtopia-based GUI integration plan for Linux mobile platforms. Contributed to porting and debugging the MP4 codec on TI OMAP and Ericsson (EMP) framework/OS. Created integration documents for EMP OS and mobile platform, covering SMS, MMS, EMS, SyncML, WAP integration, and various functionalities. Guided kernel porting for MIPS and ARM-based mobile platforms, integrating SMS, MMS, and EMS libraries.

Created and deployed voice-based management interfaces for web browsing and email reading on cellular WAP-enabled phones. Engineered voice directory services with a protocol recognizing search and navigation commands using DTMF-based commands. Integrated an MMS-synthesis library for the information delivery subsystem. Utilized UML modeling tool AccessMax to merge, enhance, and modify business logic for both KDI and IDO service providers. The C source code was generated as part of the process.