Digital Voice Systems VC-20-ATC-10B Spezifikationen Seite 46

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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 40
Figure 20: Software Architecture Diagram
6.2.2 Tasks and Interrupts
Each thread or is briefly described in Table 8. The relative priority of the
task, when active, is also presented. Threads are triggered by hardware
events or by other threads.
LINEAR
VOICE
PROCESS
(LVP_SWI)
PCM
PORT
QUE-LDIG
CODEC
PORT
CODEC ISR
(AUD_HWI)
PCM ISR
(DIG_SWI)
RATE
ADAPTOR
PROCESS
(RAT_SWI)
QUE-LPCM
QUE-LAUD
VOICE
ENCODER
(ENC_SWI)
QUE-LVOCTX
VOICE
DECODER
(DEC_SWI)
QUE-LVOCRX
COMPRESSED
VOICE
ROUTER
(CVR_SWI)
QUE-CVOCRX
QUE-CVOCTX
NIB-TX
PORT
QUE-LCOM QUE-CCOM
NIB-RX
PORT
NIB-TX ISR
(NTX_HWI)
NIB-RX ISR
(NRX_HWI)
QUE-COM3
UARTA
PORT
UARTB
PORT
UART
POLLING
(UART_SWI)
COMMAND
PROCESSOR
(CMD_TSK)
QUE-COM1
QUE-COM2
QUE-CNIBTX
QUE-CNIBRX
COMPRESSED VOICE
LINEAR VOIC
E
COMMAND & CONTROL
SYSTEM PERIODIC
TASK
(SYS_PRD)
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