27297 Parallax Inc, 27297 Datasheet - Page 141
27297
Manufacturer Part Number
27297
Description
KIT STAMPWORKS WITH BS2-IC
Manufacturer
Parallax Inc
Datasheet
1.27297.pdf
(230 pages)
Specifications of 27297
Lead Free Status
Contains lead
Product
Microcontroller Accessories
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Program: SW21-EX23-74HC595-1.BS2
' {$STAMP BS2}
' {$PBASIC 2.5}
' -----[ Program Description ]---------------------------------------------
'
' This program demonstrates a simple method of turning three BASIC Stamp
' I/O pins into eight digital outputs with a 74HC595 shift register.
' -----[ I/O Definitions ]-------------------------------------------------
Clock
SerData
Latch
' -----[ Constants ]-------------------------------------------------------
DelayTime
' -----[ Variables ]-------------------------------------------------------
pattern
' -----[ Initialization ]--------------------------------------------------
Reset:
' -----[ Program Code ]----------------------------------------------------
Main:
LOW Latch
pattern = %00000001
DO
LOOP UNTIL (pattern = %10000000)
DO
LOOP UNTIL (pattern = %00000001)
GOTO Main
GOSUB Out_595
PAUSE DelayTime
pattern = pattern << 1
GOSUB Out_595
PAUSE DelayTime
pattern = pattern >> 1
PIN
PIN
PIN
CON
VAR
0
1
2
100
Byte
' shift clock (74HC595.11)
' serial data (74HC595.14)
' output latch (74HC595.12)
' zig-zag pattern
' make output and low
' put pattern on 74x595
' hold
' shift pattern left
' shift pattern right
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