| タイトル | S-Band POSIX Device Drivers for RTEMS |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120000433 |
| 著者（英） | Lux, James P.; Lang, Minh; Taylor, Gregory H.; Peters, Kenneth J. |
| 著者所属（英） | California Inst. of Tech. |
| 発行日 | 2011-09-01 |
| 言語 | eng |
| 内容記述 | This is a set of POSIX device driver level abstractions in the RTEMS RTOS (Real-Time Executive for Multiprocessor Systems real-time operating system) to SBand radio hardware devices that have been instantiated in an FPGA (field-programmable gate array). These include A/D (analog-to-digital) sample capture, D/A (digital-to-analog) sample playback, PLL (phase-locked-loop) tuning, and PWM (pulse-width-modulation)-controlled gain. This software interfaces to Sband radio hardware in an attached Xilinx Virtex-2 FPGA. It uses plug-and-play device discovery to map memory to device IDs. Instead of interacting with hardware devices directly, using direct-memory mapped access at the application level, this driver provides an application programming interface (API) offering that easily uses standard POSIX function calls. This simplifies application programming, enables portability, and offers an additional level of protection to the hardware. There are three separate device drivers included in this package: sband_device (ADC capture and DAC playback), pll_device (RF front end PLL tuning), and pwm_device (RF front end AGC control). |
| NASA分類 | Man/System Technology and Life Support |
| レポートNO | NPO-47496 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/267738 |
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