70009 Parallax Inc, 70009 Datasheet - Page 100

• Manufacturer Part Number: 70009
• Description: BOOK UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc
• Type: Signal Analysisr

Specifications of 70009

• Style: Book
• Title: Understanding Signals
• Contents: Guide to Generate, View and Measure Wave Forms
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 70009PAR

Reading a Remote Control with DecodeSonyIRRemote.bs2
This application program is longer and more complex than the example programs used in
the other Activities. The author has inserted some informational comments; for an in-
depth look check out the Weekend Application Kit in the Further Investigation section at
the end of this chapter.
' -----[ Program Title and Description ]-----------------------------------
' Understanding Signals - DecodeSonyIRRemote.bs2
' Decode 38 kHz Sony IR TV remote control signal.
' Author: Andy Lindsay, Parallax, Inc.
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ I/O Definitions ]-------------------------------------------------
IR_detect
' -----[ Constants ]-------------------------------------------------------
active_high
active_low
' -----[ Variables ]-------------------------------------------------------
' This program reads all the pulses delivered by the remote, but in
' practice, only the first two to five pulses are required.
' used To save seven To 9 Words in RAM (in this section) and the same
' number OF PULSIN commands in the Process IR Pulses subroutine.
√
Run the program DecodeSonyIRRemote.bs2
CH1
CH2
Horizontal Dial
Trigger Source
Trigger Edge
Trigger Mode
Run / Stop Mode
Trigger Voltage
Autoscale
PIN
CON
CON
8
1
0
Off
2 V / division
2 ms / division
Channel 2 at 50%
Falling
Normal
Continuous
2 V
Off
' IR detector output -> P8.
' Used to set PULSIN commands
' to detect +/- pulses.
This can be
Figure 7-10:
OPTAscope
configuration for
handheld infrared
remote control
decoding