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PICDEM2 데이터시트(PDF) 19 Page - Microchip Technology

부품명 PICDEM2
상세설명  simple board
PDF  60 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PICDEM2 데이터시트(HTML) 19 Page - Microchip Technology

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PICDEM 2 User’s Guide
DS30374D-page 14
 2001 Microchip Technology Inc.
4.4 Service_Int Routine
This subroutine handles the A/D converter interrupt and updating of the LEDs
on PORTB. The first thing the routine does is to check if the A/D interrupt flag
is set. If it is not, the interrupt was caused by some other peripheral, and the
program returns to the main routine with interrupts re-enabled. If the interrupt
was caused by the A/D converter, the A/D result register is read, and the
value put on the LEDs. The A/D interrupt flag is then reset, and the peripheral
interrupts are enabled. The routine then waits for the sample time (2*TAD),
starts the next conversion, and returns with global interrupts enabled.
Figure 4.5: Service Interrupt
Service_int
Interrupt Service Routine
(SetupDelay)
A/D caused interrupt?
Get A/D Value
Display on LEDs
No
Yes
Reset A/D Flag
Re-enable Periph Ints
Delay for 2*Tad
Start A/D Conversion
Return
(SetupDelay)



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