Analog Devices ADSP-21479 EZ-Board, Руководство пользователя

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JTAG Interface
1-24 ADSP-21479 EZ-Board Evaluation System Manual
The DIP switches can disconnect the processor pins, which in turn are
connected to the push buttons and LEDs. See the respective switch section
in
“ADSP-21479 EZ-Board Hardware Reference” on page 2-1 .
The state of the push buttons connected to the flag pins can be deter-
mined by reading the
FLAG
register. The push buttons connected to the
DAI pins must be configured as interrupts. It is necessary to set up an
interrupt routine to determine each pin’s state.
Table 1-3 shows the push
button and processor connections.
An example program is included in the ADSP-21479 installation directory
to demonstrate functionality of the LEDs and push buttons.
JTAG Interface
The JTAG connector (
P1
) allows the standalone debug agent module to
connect a debug session to the ADSP-21479 processor. The debug agent
operates only when the external 5V wall adaptor (
P5
) is used.
The standalone debug agent can be replaced by an external emulator, such
as the Analog Devices high-performance USB-based emulator. Be careful
not to damage the connectors when removing the debug agent. The emu-
lator is connected to
P1
on the back side of the board. See “CCES Install
and Session Startup” on page 1-5 or “Vi+ Install and Session
Startup” on page 1-9 for more information.
Table 1-4. Push Button Connections
PB Reference Designator Processor Pin Connected via Switch
SW8
(
PB1
)
FLAG1
/
IRQ1 SW13.4
SW9
(
PB2
)
FLAG2
/
IRQ2
/
MS2 SW13.5
SW10
(
PB3
)
DAI_P19 SW7.3
SW11
(
PB4
)
DAI_P20 SW7.4