27220 Parallax Inc, 27220 Datasheet - Page 154

• Manufacturer Part Number: 27220
• Description: BOOK STAMPWORKS
• Manufacturer: Parallax Inc

Specifications of 27220

• Accessory Type: Booklet
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: StampWorks
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

Program: SW21-EX25-Mixed_IO.BS2
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ Program Description ]---------------------------------------------
'
' This program demonstrates the ability to use the 74HC595 and 74HC165
' together with the fewest number of BASIC Stamp IO pins.
' accomplished by placing a 4.7K resistor between the data out (pin 7) of
' the 74HC165 and the data in (pin 14) of the 74HC595.
' pin from the BASIC Stamp connects to the 74HC595.
' -----[ I/O Definitions ]-------------------------------------------------
Clock
SerData
Latch
Load
' -----[ Constants ]-------------------------------------------------------
DelayTime
' -----[ Variables ]-------------------------------------------------------
xInputs
' -----[ Initialization ]--------------------------------------------------
Reset:
' -----[ Program Code ]----------------------------------------------------
Main:
LOW Latch
HIGH Load
DEBUG CLS,
DO
LOOP
GOSUB Get_165
GOSUB Put_595
DEBUG CRSRXY, 10, 2, BIN8 xInputs
PAUSE DelayTime
"XInputs
"-------
"Status
PIN
PIN
PIN
PIN
CON
VAR
76543210", CR,
--------", CR,
........"
0
1
2
3
100
Byte
' shift clock
' serial data (74HC595.14)
' output latch (74HC595.12)
' input load (74HC165.1)
' external inputs
' get inputs
' move to extended outputs
' display current status
' pad the loop a bit
The serial data
This is