David Downey Email & Phone Number

San Jose, Ca, Us

Santa Barbara, Ca, Us

Scottsdale, Arizona, Us

AP0300 Image Signal Processor firmware• Tri-core Arm Cortex-M3 with a CEVA DSP SoC on FreeRTOS using C & C++- Drivers: Sensor embedded data, sensor trigger, JPEG, spatial transform engine, image pipe extract points, power domains, PLL driver, MIPI Tx and Rx (including D-PHY and embedded data type), and AUTOSAR MCAL ADC.- Brought up rev2 SoC.- Added Arm Software Test Libraries (STL) to three cores.- Code testing, standards, and tools: Fixed MISRA C & C++ violations detected by Klocwork. Implemented CppUTest framework and tests. Wrote C & C++ coding standard. Implemented Uncrustify, Doxygen, and Lauterbach frameworks.

Xizhi District, New Taipei City, Tw

Cloud IoT devices and Android companion apps• Production IoT (ARM Cortex-M3) device and Android AAR- IoT (IAR/FreeRTOS using C): Implemented user and device management, persistent memory, state machine, button detection, LED control.- Android AAR (Java): Implemented user and device management, key-value cloud storage.• “IoT” (Raspberry Pi) and Android companion app plant watering demonstration- Single-handedly created entire client-side HTTP/MQTT demo.- RPi (Python): Provisioned to cloud. Measured water flow, light, moisture, temperature, and humidity. Controlled water pump.- Android (Java): Provisioned IoT device. Listed plants. Graphed water flow, light, moisture, etc. over time.• libcoap (MW302 WiFi uController (ARM Cortex-M4) SoC on FreeRTOS using C)- Ported libcoap to platform.- Tested libcoap against ETSI CoAP plugtest, using a ported CoAP client and remote CoAP server.• IP camera (Raspberry Pi using Linux/C)- Upgraded SW from Debian Wheezy (SysVinit) to Jessie (systemd).- Fixed various bugs

San Jose, Ca, Us

Impression Pi Virtual Reality Headset• Qualcomm Snapdragon 805 (Android KK) platform using C- Integrated dual MT9M021camera and Hillcrest SH-1 sensor hub drivers.

Santa Clara, California, Us

Atom (Bay Trail & Cherry Trail) CPU platforms• Experimental Touch Panel- MATLAB, Linux desktop, and Zynq platform: Prototyped and benchmarked touch panel algorithms.- Windows 8* C DLL: Ported touch panel algorithm.* Visual Basic: Created an app that fetched raw data from an NI ADC card, input the data into the DLL, and displayed the resultant touch data onto a GUI.• Maxim Touch Panel (Android KK & L on Atom (Cherry Trail) platform using C)- Modified SPI-based Maxim touch driver to work on platform.- Adapted two platform GPIOs to serve as driver’s INT and RST lines.• Camera/Sensor Sync (Android KK on Atom (Bay Trail) platform using Java and C)- Linux: Modified kernel to toggle GPIO for each camera frame.- I2C Sensor Hub FW: Modified FW to tag sensor data with a sequence number for each GPIO assertion.- NDK: Modified sensor HAL to accommodate the sequence number field.- SDK: Modified app to match camera frames with sensor data.• Benchmark (Android KK NDK/Linux on Atom (Bay Trail) platform using C)- User space CRC32 on kernel memory vs. kernel CRC32 on kernel memory

San Jose, Ca, Us

Catalyst Switches• Linux (Cisco’s “Nova” distribution on a Cavium 6230 (MIPS64, 4 core) platform using C):- Fixed memory leak, SNMP, and temperature sensor bugs.

San Jose, California, Us

MIPS32 and microMIPS RISC architectures• Xilinx Vertex-6/XCVLX110 FPGA platforms using C:- Linux 2.6.35 kernel: Added new microAptiv, interAptiv, and proAptiv processor support. Fixed kernel vs. userspace (Debian and TimeSys) incompatibilities. Added kernel command line options. Added /sys/…/cpufreq/ entry.- Bootloaders* U-Boot: Added platforms. Ported YAMON functionality.* YAMON (MIPS open-source bootloader): Added new processor support. Added debug features (report true memory size via SPD, option to boot uncached, L1 cache diags).* Drivers: Ethernet (PCnet), I2C (PIC32-based), RTCs (MC146818 (PIXX4) and M41T81S)- EZ-USB (Cypress FX2LP USB 8051 (MCS51) Microcontroller/High-Speed USB Peripheral Controller):* Ported Keil C51 code to SDCC.* Added platforms and features (status LED).- Debug: Created scripts that decoded new processors’ out-of-order execution (signaled to a logic analyzer).

Seattle, Wa, Us

Kindle• Linux (2.6 on a Freescale ARM Cortex A8 (i.MX508) platform using C++):- Diagnostics and bug fixes: Atheros Wi-Fi (AR6003), Freescale power management IC (PMIC) (MC13892), TI E Ink PMIC (SN92009A4), eMMC, mDDR, Freescale accelerometer (MMA8453Q), Wolfson audio codec (WM8962)

Davidson, North Carolina, Us

RQ-4N Global Hawk Unmanned Aerial Vehicle• Linux (embedded WindRiver 3.0 on a MPC8641D platform using C): - Drivers: Discrete IO (Low-Voltage TTL, Differential RS422), EEPROM (CAT24C16), NMEA-0183, Power Supply - Built-In Tests (BIT): EEPROM, Power Supply• VxWorks 6.7 (on a MPC8641D platform using C): - Drivers: Power Supply, NMEA-0183 - BIT: Discrete IO, EEPROM, Elapsed-Time Indicator (ETI), One Pulse Per Second (1PPS), Temperature Sensors (CAT6095 and RTDs connected to LTC2309 ADCs)• Documents (using DOORS): Software Design Description (SDD), Interface Design Description (IDD), Version Description Document (VDD)• Gave several presentations to the customer detailing the system's software design.

Sunnyvale, Ca, Us

Data Distribution System Middleware• Linux (embedded LynxOS on a MPC7448 platform using C/C++ and Java): Ported middleware.• VxWorks MILS 2.0 (on a MPC8641D platform using C/C++ and Java): Ported middleware.

Palo Alto, Ca, Us

Sun Ray Thin Clients• BSD-like embedded RTOS (on a MIPS Au1550 platform using C):- Drivers: Smart card (Philips TDA8007B), Wi-Fi (Ralink RT2561)- Diagnostics: USB- Protocols: PPPoE, Local PIN Entry• UNIX (Solaris on SPARC and x86 using C):- Protocols: PPPoE, Local PIN Entry• Linux (SUSE on x86 using C): Local PIN Entry

Various Windows apps• Windows XP- App (using C++): Added Win32 graphics to a science app.- Office (using VBA): Added functionality to a utility company's Word form.

Falls Church, Va, Us

BQM-74F Unmanned Aerial Vehicle• Proprietary embedded RTOS (on a BAE Systems processor using C): Added software enhancements.

Arlington, Va, Us

Wideband Gapfiller (Military) Satellite• Led a team of five engineers.• VxWorks (on a PowerPC 750 platform using C):- Drivers: High-Throughput PCI DMA, Interrupt Controller (handled 400 sources)• Windows XP- DLL (using C): Test Station/VxWorks UUT Interface

Charlotte, North Carolina, Us

Airbus A380 Airliner• Proprietary embedded RTOS (on a AMD 29050 platform using C++):- Protocol: Data Transfer over AFDX• Documents (DO-178B): Flight Management System's ICDs, SRDs, SDDs- Protocols: ICMP, SNMP, Printer- Interface: Input/Output Controller

Arlington, Va, Us

WAH-64D Apache Attack Helicopter• Proprietary embedded RTOS (on proprietary system and weapons processors using Ada and C): Added software enhancements.

San Jose, Ca, Us

- Ported Linux PPPoE access-concentrator and host source code to VxWorks.

Us

GE60 60GHz Gigabit Point-To-Point Wireless Link• VxWorks (on a MPC850 platform using C):- Kernel: Fixed DHCP bugs, added multiple boot paths- Drivers: Cable amplifier (MAX3510), FPGAs (Xilinx), NVRAM (DS1250W), Temperature Sensors (AD7814 and MAX1617)- Protocol: Envoy SNMP Agent

Ca

Shasta Subscriber Service System• VxWorks (on a PowerPC 750 platform using C):- Diagnostics: Ethernet (Intel 21143 ) (internal loopback test), PCI-to-ISA/IDE Xcelerator (PIIX4E), RAM Datapath• Windows NT 4.0 (using LabWindows CVI and Visual BASIC):- App: Automated Functional Tests (Read test scripts, wrote and read commands through a GUI, transmitted and received data through a pair of RS-232 ports, and recorded test results in log files.)

Bandwidth Optimization Engine• Linux ("embedded" Red Hat using C):- Protocol: SNMP agent (CMU's snmpd)- Scripts: Automated Tests (Set up several micro web browsers and micro web servers on several Linux PCs, carved out IP routes between the PCs and the compressor across Ethernet, launched the web servers and browsers, processed and graphed the raw output, and stored the results on a file server.)

LMDS base station and CPE prototypes• Windows NT 4.0- Drivers (DLLs): ADCs, Digital I/O Boards, FIFOs, Parallel Ports, Serial Ports, VXI boards (register and message-based)- Protocol: SNMP (Manager: Using C++ with MFC and HP OpenView’s SDK. Agent: Using C with Windows NT’s extensible agent.)- App: Spectrum Analyzer (C DLLs directly interfaced with ADCs and hardware FIFOs as well as performed an FFT on the collected time domain points. A Visual BASIC GUI displayed the resultant frequency response.)- System: Manager/Base Station Software (Manager: Controlled/monitored as well as downloaded code to base stations via modem using Visual BASIC. Base Station: DOS "embedded" SW using C.)

Fortezza and iPower Security PC Card• UNIX (Solaris on SPARC using C): Test Apps (Tested RSA public/private key and triple-DES security.)

Algebra I & II Multimedia Courseware• Supervised 15 software testers during swing shift.• Drafted test scripts.• Implemented automated tests and bug tracking systems.

Us

Networking Computer Equipment• Designed Ethernet, Token Ring, FDDI, and ATM LANs and WANs for prospective customers.• Wrote detailed proposals and gave customer presentations outlining my designs.• Coordinated entire network installations, including hubs, switches, cabling, and NICs.• Helped make the company half a million dollars.

Ms, Computer Engineering

Bs, Electrical Engineering