74hc595

Archiver

I deleted the email I needed
the one about connecting more
than one 74hc595 together and
using the 3 stamp pins

can you please email me it-

thanks kevin

Archiver

Hi Jon:

I've been trying to adapt that '595 circuit on p395 of Basic Stamp manual
1.9 to run a LCD (Omron DMC-16117A), can't get it to work.

I just subscribed to Nuts & Volts, sure wish they had their back issues on
the 'net or even the whole thing on the net as well as the paper monthly
issue.

Anyway, is there any quick tips you don't mind repeating for getting the
'595 to work with an LCD.

Best Regards,

Mark

' 9/3/00
'Pin out for DMC-16117A
'1 Vss Vss
'2 Vcc Vdd
'3 Vee 10K pot
'4 RS P04 |register select, H=data input, L=instruction input
'5 R/W Vss |R/W read/write, H=data read, L=data write,always low we ain't
gonna do any reading.
'6 Enable P06 |E enable, H=enable, no pull-up resistor
' DMC-16117A <- 74HC595
'7 DB0 H/L - P15 |
'8 DB1 H/L - P01 |
'9 DB2 H/L - P02 |
'10 DB3 H/L - P03 |<- DMC-16117A <-74HC595
'11 DB4 H/L - P04 |
'12 DB5 H/L - P05 |
'13 DB6 H/L - P06 |
'14 DB7 H/L - P07 |
' P08 -> GRND
' P16 -> Vcc
' P14 -> BSC P00 "data in"
' P13 -> GRND
' P12 -> BSC P02 "latch"
' P11 -> BSC P01 "clock"
' P10 -> +5
' P09 -> NC
' LCD control pins
DataP con 0 ' data pin to '595
Clock con 1 ' shift clock to '595
Latch con 2 ' moves data from shift register to output latch
RS con 4 ' Register Select (1 = write instruction, 0 = write data)
E con 6 ' LCD enable pin (1 = enabled)
'

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[noparse][[/noparse] Variables ]

---

counter VAR byte ' counter
'

---

[noparse][[/noparse] Initialization ]

---

'
Init: Dirs = %1111111111111111 ' set unused and everything else to
save
' power and protect TTL, only output for this example.
Pause 200

'INSTRUCTION INPUT
low RS
Pause 200

' Initialize the LCD (Hitachi HD44780 controller)
I_LCD:

OutH = %00001111 ' display control
PULSOUT E, 1 'on off
PULSOUT E, 1 'cursor on off
PULSOUT E, 1 'blink of cursor position char

OutH = %00111000 ' function set, 8-bit mode
PULSOUT E, 1 'dl 1 = 8
PAUSE 10 'number of lines, use 2, so enter 1
PULSOUT E, 1 'character font, 1 5X10, 0 5X7
PULSOUT E, 1 'last 2 don't care.

OutH = %00000001 ' clear
PULSOUT E, 1
PULSOUT E, 1
PULSOUT E, 1

OutH = %00000010 ' cursor home
PULSOUT E, 1
PULSOUT E, 1
PULSOUT E, 1

high RS
pause 100

'write to initialized LCD

top:

Shiftout DataP, Clock, lsbfirst,[noparse][[/noparse]counter] 'send the bits
Pulsout Latch, 1 'transfer the bits
pause 150 'wait briefly
counter = counter + 1 'increment counter

debug dec ? counter

goto top

low RS

stop

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Original Message

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From: jonwms@a... <jonwms@a...>
To: basicstamps@egroups.com <basicstamps@egroups.com>
Date: Sunday, September 03, 2000 9:29 AM
Subject: Re: [noparse][[/noparse]basicstamps] 74hc165?


>In a message dated 9/3/00 11:21:36 AM Central Daylight Time,
>mcmgamer@n... writes:
>
>> I know you can use the 74hc165 to receive an 8-bit number from up
>> to 8 different high/low inputs. I wanted to know if you could also
>> output with a 74hc165. Could I send and 8-bit number from my stamp
>> to then set the high/low status of those 8 pins on the IC?
>> If anyone has any code they could provide my with regarding
>> sending or receiving data from the 74hc165 it would be a big help. I
>> would also love a short description on how to wire the IC.
>
>The x165 is a parallel-in, serial-out (to Stamp) shift register. This
means
>you can use it for inputs, but not outputs. You can use the 74hc595 for
>outputs. It's also very easy to use.
>
>In the June issue of Nuts & Volts magazine, my Stamp Applications column
>shows how to use both. The x165 to read a keypad and the x595 to output
data
>to a character LCD. The article includes schematics and BS2 code.
>
>-- Jon Williams
>-- Dallas, TX
>
>
>
>