70016 Parallax Inc, 70016 Datasheet - Page 207

• Manufacturer Part Number: 70016
• Description: TEXT INFRARED REMOTE FOR BOE-BOT
• Manufacturer: Parallax Inc

Specifications of 70016

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Boe-Bot®
• For Use With: 29122 - KIT PARTS IR REMOTE FOR BOE-BOT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Each
multiplies one of the bits in the remoteCode variable by 300 before adding 300. Without
parenthesis, the order of operation is left to right. If
result of
remoteCode.BIT3
300 = 600. More generally, the result of these expressions in each
duration argument is 600 if the given bit is 1, or 300 if it's 0, which causes the
command to turn the 555 timer's 38 kHz signal on, either for a duration of 1.2 ms or 0.6
ms.
Even though the same results can be obtained by the
work in the program because of signal timing considerations.
remoteCode.BITX * 300 + 300
block below takes well over a millisecond. While a SONY TV set might or might not be
forgiving enough to decode the signal, the example programs from this text that receive
and decode IR messages are not that forgiving.
PULSOUT
Send_Ir_Remote_Code:
FOR index = 0 TO 11
NEXT
' Change button values to remote codes.
IF (remoteCode = 0) THEN remoteCode = 10
IF (remoteCode <= 10) THEN remoteCode = remoteCode - 1
remoteCode.BIT7 = 1
LOW tPin
PAUSE 26
PULSOUT tPin, 1200
PULSOUT tPin, remoteCode.BIT0 * 300 + 300
PULSOUT tPin, remoteCode.BIT1 * 300 + 300
PULSOUT tPin, remoteCode.BIT2 * 300 + 300
PULSOUT tPin, remoteCode.BIT3 * 300 + 300
RETURN
IF remoteCode.L0WBIT(index) = 1 THEN
ELSE
ENDIF
PULSOUT tPin, duration
remoteCode.BIT2
.
.
.
duration = 600
duration = 300
command in the
is 1, then the result of
Send_Ir_Remote_Code
*
300
calculation, which takes around 500 µs, the code
remoteCode.BIT3
+
300
is 0 * 300 + 300 = 300.
FOR...NEXT
remoteCode.BIT2
subroutine has an argument that
' Set bit-7 = 1 for TV
' 555 signal off
' Rest between messages
' Start pulse
' Bit-0 pulse
' Bit-1 pulse
' Bit-2 pulse
' Etc...
is 1 * 300 + 300 = 300 +
PULSOUT
loop below, it won't
= 0 then the
Unlike the
command's
PULSOUT
If