Digital Voice Systems VC-20-ATC-10B Especificaciones descargar pdf (Pagina 37)

FAA20 Embedded NEXCOM Vocoder

Board Manual

This manual has been prepared for the Federal Aviation Administration.

FA100-00107 (March 2004) – Rev 1.0.0 Page 31

5.4.3 Programmable LEDs

The FAA20 supports the programmable assignment of virtual indicators to

physical LED indicators. There are 40 virtual indicators and 6 physical

indicators (LED1..LED6).

The virtual indicators fall into four major categories:

• Audio Indicators. The audio indicators are used to display audio

energy and peak level events. Two of the most commonly used

indicators, LANYP and LANYA, are assigned by default to LED1 and

LED2, respectively. The other audio indicators (which are specific to

certain mixer ports) are useful in troubleshooting mixer and level

setup problems.

• Program Task Indicators. The program task indicators are used to

measure software task execution times and interrupt latencies.

These LEDs are typically used only during program development.

• Test Indicators. The test indicators are used to troubleshoot unit

integration.

• General Indicators. The general indicators display unit operating

conditions, e.g. truncated timing mode and runtime health.

Table 7 provides a brief description of the available virtual indicators. The

audio TX and RX references in the LEDNAME refer to signal directions with

respect to the mixer, i.e. the TX refers a mixer output port and the RX refers

to a mixer input port.

Table 7: Virtual Indicator List

BITNAME TYPE* DESCRIPTION

OFF General OFF. Turns LED off.

ON General ON. Turns LED on.

AUD_HWI Task Audio Hardware Interrupt.

PCM_HWI Task PCM Hardware Interrupt.

NTX_HWI Task Nibble Transmit Interrupt.

NRX_HWI Task Nibble Receive Interrupt.

RAT_SWI Task Rate Adapter Software Interrupt.

LVP_SWI Task Linear Voice Processor Software Interrupt.

ENC_SWI Task Encoder Software Interrupt.

DEC_SWI Task Decoder Software Interrupt.

CVR_SWI Task Packet Router Software Interrupt.

COM_SWI Task UART Polling Software Interrupt.

TRUN General Truncated Timing Mode. When lit, indicates that the

FAA20 is in truncated timing mode.

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 108 109

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Digital Voice Systems VC-20-ATC-10B Especificaciones Pagina 37