28123 Parallax Inc, 28123 Datasheet - Page 68

• Manufacturer Part Number: 28123
• Description: TEXT WHAT'S A MICROCONTROLLER
• Manufacturer: Parallax Inc
• Type: Programmingr

Specifications of 28123

• Style: Book
• Title: What's a Microcontroller?
• Contents: Whats a Microcontroller? Text
• Product: Microcontroller Accessories
• Core Processor: PIC16C57c
• Flash: 128 Bytes
• Operating Supply Voltage: 9 V
• Board Size: 31 mm x 16 mm
• Lead Free Status / RoHS Status: Not applicable / Not applicable

DO
LOOP
Controlling Both LEDs
Yes, you can flash both LEDs at once. One way you can do this is to use two
commands before the first
next
LEDs off. It’s true that both LEDs will not turn on and off at exactly the same time
because one is turned on or off after the other. However, there is no more than a
millisecond’s difference between the two changes, and the human eye will not detect it.
Example Program: FlashBothLeds.bs2
' What's a Microcontroller - FlashBothLeds.bs2
' Turn LEDs connected to P14 and P15 on and off.
' {$STAMP BS2}
' {$PBASIC 2.5}
DEBUG "Program Running!"
DO
LOOP
HIGH 15
PAUSE 500
LOW 15
PAUSE 500
HIGH 14
HIGH 15
PAUSE 500
LOW 14
LOW 15
PAUSE 500
HIGH
√
√
√
Enter the FlashBothLeds.bs2 code into the BASIC Stamp Editor.
Run the program.
Verify that both LEDs appear to flash on and off at the same time.
command sets P15 high. You will also need two
PAUSE
command. One
HIGH
command sets P14 high, and the
LOW
commands to turn both
HIGH