Developed various tests and tools for developing and validating display systems on Xbox One, Microsoft Band and Hololens. Worked on HDMI input/output, display pipeline, manufacturing test and vision-based display test.

Write/implement DiiVA(Digital Interactive Interface for Video and Audio) specification.Develop software for diagnosis and verification of DiiVA SoCDevelop firmware for DiiVA SoC, which has custom MIPS CPU, DiiVA interface, HDMI TX/RX, Ethernet, Audio interface, SPI, USB, etc.Implement HDCP2.0 for DiiVA SoCPort/improve boot-loader/RTOS(uboot, uCOS, picoOS) for in-house MIPS CPU.Develop Python GUI application for SoC debugging and monitoring.Verify cache system for quad-core CPU and analyze performance.

Develop and maintain NDAS(storage network for home usage) drivers for various operating systems: Linux, uCOS/II, vxWorks and Windows CE. - The driver consists of hardware abstraction layer, network protocol driver, storage driver. - Ported NDAS drivers and application to 20+ embedded systems (PDA, IP camera, Media player, NAS server, router and etc.) and desktop Linux.Developed NDAS specifications and validation/testing software for NDAS SoC.Developed tools for supporting customers and manufacturers of NDAS IC.Developed software RAID drivers for NDAS system on MS Windows system.

Developed software for L2/L3 gigabit switch - Developed boot-loader and device drivers for custom CPU board - Developed drivers for network routing engine - Developed/ported various network protocols such as 802.1Q VLAN, SNMP and STP/RSTP. - Command line management software