Transcript box - Element14

Arduino Real Time Data
The Mission is to monitor an electronic test bench to include:
• Read/Display 16 analog values.
• Read/Decode 14 Digital pin bus for clock control.
• Read/Write a 32 bit bus by nibbles.
• Generate a data log
• View/Interact via a PC.
• Display bench (BOX) values on a LCD display and PC.
• Add WiFi via BT_BOARD V1.04.
PLX-DAQ: (Works but it’s Limited).
p.02 Getting Setup files and brief over view of PLX-DAQ.
p.03 Arduino source code and notes concerning same.
p.04 Excel data sheet containing VB code allowing Arduino data acquisition.
PROCESSING:
p.05
Arduino and processing: set-up files, Arduino & P2 source code.
p.06
Changing the 32bit data bus.
p.07
Generating real time log file.
p.08
Excel data sheet generated (log file).
p.09
Collection of Arduino Ports used and plan to include LCD display.
p.10
Details on the SPLC780D LCD display, Arduino LCD code to drive it.
P.11-13 Tying 74LS164 shift register to Arduino.
p.14
Recap of ports used and program references.
p.15-16 Use of BT_BOARD v1.04.
p.17 -18 74LS157 DataSheet & 74LS164 DataSheet
p.19+
More Stuff: Collection of notes.
1
PLX-DAQ Set-Up: Getting Necessary Files
•
•
•
•
Download Arduino Mega2560:
http://arduino.cc/en/Main/ArduinoBoardMega2560
Download Arduino Processing:
http://playground.arduino.cc/Interfacing/Processing
Note: This was done but not employed. Firmata DB was for UNO.
Download PLX-DAQ:
http://www.parallax.com/tabid/393/Default.aspx
Blog on PLX-DAQ-n-Arduino:
http://robottini.altervista.org/arduino-and-real-time-charts-in-excel
Brief PLX-DAQ Code Used in Arduino Sketches. I think this all of it:
LABLE
- Used to define the column headings.
Syntax: Serial.println (“LABEL, INT_COLUMN”);
DATE, TIME - Allows the serial port to send data to Excel.
Syntax: Serial.print (“DATE, TIME,”); Serial.println (val);
Note: Serial.print (“DATE, TIME,”) must be used before
each Serial.println();
ROW, SET, k, - This allows control over the row that excel accepts data.
Syntax: Serial.println(ROW, SET, #);
The column control: Serial.print(“,”) ; Like CSV
2
Short Ardunio Script Placing Arduino Reads into Excel Meter
Open Document Text
Double click to open, 233 line sketch, reading analog pins A(15:0] and sending it to ECEL. Need win2k or better.
14 bit decode of up/dwn counters to display CLK, and write A5A5 to nibs 7:4 and read that into nibs 3:0.
Use bench_mon.xlsm found in PLX-DAQ.
Box7_ino. txt
NOTES:
The Arduino code writes to columns 1-3 (A-C) and ECEL maps columns B to G and to C
to I .Column A is the “DATA, TIME, “ This is needed to have EXCEL read the incoming
data.
ECEL Snapshot
Supplies
5V
5.00
V
0.00
mA
12V
3.44
V
0.00
mA
V-V
2.26
V
0.00
mA
N12V
4.99
V
0.00
mA
8 Nibs can be read or written: pic shows a write of A5A5 and reading same. The value to
R/W is CSV file read by script.
The frequency will be the decode of up/down counters used to generate CLOCK with base
frequency of either 10 or 20 MHZ crystal module and I really need the “BOX” to finish
this.
Measured
A1-2
0.00
V
5.00
V
A3-4
0.00
V
5.00
V
A5-6
0.00
V
5.00
V
A7-8
5.00
V
5.00
V
Main Clock
10.00
813.74
BASE
CLK
MHZ
HZ
NIBS [15:0]
Data R
-
-
-
- H
Data W
A 5 A 5 H
A 5 A 5 H
-
-
-
- H
Reads of 12 analog ports with wait of 5mS B/W reads plus
40mS at end of reads allows about 10 reads/s.
The box colors are based on the data received , set in EXCEL.
Supply : 0<=5V consider a 5% de-rating.
Supply >5v are a 10% de-rating.
All values read outside their de-rating show RED.
The voltages monitored were 5V, 3.3V and 0V and the one pot V- OUT seen in the V-V
supply where the color green/red was base on value V>= 0 = green and anything else is
red.
All current values were tied to 0V where 0-0.9 = green and
any measurement above or below this range is red.
The Measured value has no constraints and will always be green.
Must! open xcel to blank sheet. Connect to data port then
move meter sheet to first page (blank out Meter).
3
EXCEL Data Sheet Used
THE BOX
10:15:41
10:15:41
10:15:41
10:15:41
10:15:41
10:15:41
10:15:40
10:15:40
10:15:40
10:15:40
10:15:41
AM
AM
AM
AM
AM
AM
AM
AM
AM
AM AM A
5.00
0.00
3.44
0.00
2.26
0.00
5.00
0.00
0.00
5.00
0.00
4.99
0.00
4.99
5.00
5.00
1.22 kHZ
-
Supplies
10 MHZ
A 5A 5
5A
5- - - -
5V
5.00
V
0.00
mA
12V
3.44
V
0.00
mA
V-V
2.26
V
0.00
mA
N12V
5.00
V
0.00
mA
Measured
A1-2
0.00
V
5.00
V
A3-4
0.00
V
4.99
V
A5-6
0.00
V
4.99
V
A7-8
5.00
V
5.00
V
Main Clock
10.00
1.22
BASE
CLK
MHZ
kHZ
NIBS [15:0]
Data R
-
-
-
- H
Data W
A 5 A 5 H
A 5 A 5 H
-
-
-
- H
This is the excel DB used. The DATE,TIME, field A1 , measured value 1-2=B2-3.
You must use the downloaded excel worksheet it contains VB code that allows Arduino
access, or this one. Sheet : bench_mon2.xlsm.
4
ARDUINO & PROCESSING
Download Processing:
http://processing.org
Download Arduino Processing:
http://playground.arduino.cc/Interfacing/Processing
Copy folder Arduino to processing folder
C:\downloads\processing-2.0.1-windows32\processing-2.0.1\modes\java\libraries
Enter processing and add font: “Arial-BoldMT-14”, <Tools><Create Font>
Add sketch box_proc_pde.txt making the box.
box_proc_ino.t xt
Add patch to Arduino IDE.
See More Stuff: ending pgs..
box_proc_pde. txt
Click R-W to change the 32 bit bus status.
Click Log to allow data log.
5
Change The 32 Bit Bus
The meter will default to all
read: r,r,r,r,r,r,r,r . Click R-W
and the box below will popup, make your entry and
click OK. The board is
currently wired upper 2
bytes to the lower 2 bytes,
so it will read what it
writes.
6
Data Log
Click the Log button and the box
below will pop-up suggesting a file
name of the current date and time.
Accept it or change to your
preference. This will write out a CSV
file containing the measurements and
settings of the box.
7
CSV File
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.26
8.26
8.26
8.26
8.26
8.26
8.26
8.26
8.26
8.26
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
8.25
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.21
9.22
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.43
2.43
2.43
2.43
2.43
2.43
2.43
2.43
2.43
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
2.44
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.01
1.01
1.01
1.01
1.01
1.01
1.01
1.01
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.02
1.01
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
2.05
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
4.99
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
610.39
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
HZ
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
MHZ
8
The Box Settings and Ports used, also the plan to include SPLC870D LCD Display
Idenity ~Value
5V
5.00
5V_I
1.65
12V
8.25
12V_I
1.65
V-V
14.96
V-V_I
1.65
N12V
3.96
N12V_I 1.65
A0
1.65
A1
1.65
A2
5.00
A3
5.00
A4
3.33
A5
3.33
A6
5.00
A7
4.99
CLK
610.39
FREQ
HZ
BASE
10
FREQ
MHZ
NR7
F
NR6
F
NR5
F
NR4
F
NR3
F
NR2
F
NR1
F
NR0
F
NW7
NW6
NW5
NW4
NW3
NW2
NW1
NW0
R-W7
r
R-W6
r
R-W5
r
R-W4
r
R-W3
r
R-W2
r
R-W1
r
R-R0
r
CSV CNT
chars
Duib Port
4
4
5
4
5
4
5
4
4
4
4
4
4
4
4
4
6
3
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
D[13:2,14,15]
D[52,50,48,46]
D[44,42,40,38]
D[36,34,32,30]
D[28,26,24,22]
D[53,51,49,47]
D[45,43,41,39]
D[37,35,33,31]
D[29,27,25,23]
D[52,50,48,46]
D[44,42,40,38]
D[36,34,32,30]
D[28,26,24,22]
D[53,51,49,47]
D[45,43,41,39]
D[37,35,33,31]
D[29,27,25,23]
-
I/O
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
S1
Port Chars
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
4
4
5
4
5
4
5
4
4
4
4
4
4
4
4
4
6
0
2
0
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
165
165
165
165
Add
Units
Chars
Space( )
0
1
5
2
.
3
0
4
0
5
V
6 7 8
1
9
6
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8
5 m A
1 2 . 3 5 V
1 6 5 m A
6 0
H
V
mA
V
mA
V
mA
V
mA
V
V
V
V
V
V
V
V
2
3
2
3
2
3
2
3
2
2
2
2
2
2
2
2
0
4
3
4
2
0
0
0
0
0
0
2
2
0
0
0
0
0
0
2
1
5
0
0
.
.
.
0
0
0
0
1
5
V
V
V
1
0
0
6
.
.
5 m A
0 2 V
0 6 V
kHZ
MHZ
R
H
W
H
0
10
BOX0UC(V,mA,V,mA,BS,V,mA,V,mA,C)
BOX0UP( 5,12,20,27,30,45,52,60,67,69)
Serial Port
CHARS PORTS
105
62
~ 1 2
0
0
.
.
.
1 5 V
0 3 V
0 7 V
20
1 6 5 m A
0 . 0 4 V
0 . 0 8 V
9
Z
0 . 0 1 4 6
H Z
R > ~ ~ ~ ~ A B C D H
W > A B C D ~ ~ ~ ~ H
30
40
15 Chars
BOX0DM(5,4,5,4,2,3,5,4,6,4,7,3)
BOX0DP( 4,10,19,25,33,39,44,50,59,65,76,79)
BOX1UC(V,V,V,V,R>,H,V,V,V,V,W>,H)
14 Chars
BOX1UP( 5,12,20,27,30,39,45,52,60,67,70,79)
BOX1DM(5,5,5,5,8,5,5,5,5,8)
BOX1DP( 4,11,19,26,38,44,51,59,66,78)
SPLC Charactor Chart
Serial2 Port
Chars
158
194
62
9
SPLC780D/74LS164
1
17
18
16
Arduino source code driving LCD. Lcd2 uses on change write
Lcd_ino.txt
SPLAC780D DATA SHEETS
http://www.datasheet4u.com/datas
heet/S/P/L/SPLC780D_SunplusTechn
ology.pdf.html
Pin/Signal Wire
1 DB7
Blue Solid
2 DB6
Blue Striped
3 DB5
Brown Solid
4 DB4
Brown Striped
5 DB3
Blue Solid
6 DB2
Blue Striped
7 DB1
Brown Solid
8 DB0
Brown Striped
9 E1
Blue Solid
10 R/W Blue Striped
11 RS
Green Solid
12 V0
Green Striped
13 VSS
Green Striped& Solid
14 VDD Orange Solid
15 E2
Orange Striped
16 NC
17 LEDA Orange Solid
18 LEDK Green Solid
Lcd2_ino.txt
Connector
DB6 -2 1-DB7
DB4 -4 3-DB5
DB2 -6 5-DB3
DB0 -8 7-DB1
R/W-10 9-E1
V0-12 11-RS
VDD-14 13-VSS
NC-16 15-E2
17 LEDA 5V
18 LEDK GND
10
SPLC780D HOOK-UP
5V
RAILS
GND
1
16-R_S
21-E1
20-E2
19-R_W
18-D_I
17-CK
17 LEDA 5V
18 LEDK GND
16
Arduino pins used
as digital outputs:
D[21:16] .
7 4 L S 1 6 4
DB7 -1
DB5 -3
DB3 -5
DB1 -7
E1 -9
RS -11
VSS -13
E2 -15
2 -DB6
4 -DB4
6 -DB2
8 -DB0
10 -R/W
12 -VO
14 -VDD
16 -NC
VO, Was Designed to tie
through a 10k pot to GND.
R/W=0=Write; RS=0=INS
11
Free-up RX/TX3 To Include BT_BOARD V1.04
5V
RAILS
GND
1
17 LEDA 5V
18 LEDK GND
16-R_S
R/W
16
¼ 74LS157
19-E
2:1
Arduino pins
used as digital
outputs:
D[19:16] .
E2
E1
2:1
18-D_I
7 4 L S 1 6 4
DB7 -1
DB5 -3
DB3 -5
DB1 -7
E1 -9
RS -11
VSS -13
E2 -15
2- DB6
4- DB4
6- DB2
8- DB0
10- R/W
12- VO
14- VDD
16- NC
17-CK
VO, Was Designed to tie
through a 10k pot to GND.
R/W=0=Write; RS=0=INS
12
LCD DISPLAY
13
PORTS/PINS/PROGRAM_VAR_NAME
PIN
PIN-CNT
PROGRAM
COMMENTS
A0-15
53,51,49,…,23
52,50,48,…,22
PWM[13:2]
(TX/RX)0 1,0
16 voltage[15:0]
16 RWPorts[53,…,23]
16 RWPorts[52,…,22]
12 DP[13:2]
2 NONE
Analog read with limits set for disp. color
Digital pins set for R/W
Digital pins set for R/W
Used as dital pins to decode CLK up/dn counter
USB PORT
(TX/RX)3 15,14
2 RXD/TXD
SB[1:0]
1 R_S
1 CK
1 D_I
1E
R_W
2 SB[1:0]
E[2:1]
70
Drive BT_BOARD
Select base frequency(20MHZ,1MHZ,1kHZ,60HZ)
LCD drive RS pin
LCD drive CK on the 74LS164 shift register.
LCD drive A-B on 74LS164 (data, enable).
LCD drive E[2:1] on SPLC780D
LCD Drive R/W
Select base frequency(20MHZ,1MHZ,1kHZ,60HZ)
Drive LCD E2:1.
Pins used.
TX2-16
RX2-17
TX1-18
RX1-19
SDA/SCL-21:20
See p.11, 6 pin LCD
See p.12, 4 pin LCD
Arduino Data Sheet http://www.robotshop.com/media/files/PDF/ArduinoMega2560Datasheet.pdf
The PDF file is huge! 8g so it was removed and replaced by the pointer above.
14
BT_BOARD V1.04
* Correspondence with seller:
VCC < 7V
If VCC = 5V then RX/TX will
achieve TTL 5V levels.
Industrial serial port Bluetooth, Drop-in replacement for wired serial connections, transparent usage.
You can use it simply for a serial port replacement to establish connection between MCU and GPS,
PC to your embedded project and etc.
Computer and peripheral devices
GPS receiver
Industrial control
MCU projects
Default serial port setting : 9600 1
Pairing code : 1234
Running in slave role: Pair with BT dongle and master module
Usage
Coupled Mode: Two modules will establish communication automatically when powered.
PC hosted mode: Pair the module with Bluetooth dongle directly as virtual serial.
Bluetooth protocol : Bluetooth Specification v2.0+EDR
Frequency : 2.4GHz ISM band
Modulation : GFSK(Gaussian Frequency Shift Keying)
Emission power : <=4dBm, Class 2
Sensitivity : <=-84dBm at 0.1% BER
Speed : Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps
Security : Authentication and encryption
Profiles : Bluetooth serial port
CSR chip : Bluetooth v2.0
Wave band : 2.4GHz-2.8GHz, ISM Band
Protocol : Bluetooth V2.0
Power Class : (+6dbm)
Reception sensitivity: -85dBm
* Voltage : 3.3 (2.7V-4.2V) ** NOT CORRECT
Current : Paring - 35mA, Connected - 8mA
Temperature : -40~ +105 Degrees Celsius
User defined Baud rate : 4800, 9600, 19200, 38400, 57600, 115200, 230400,460800,921600,1382400.
Dimension : 26.9mm*13mm*2.2mm
15
BT_BOARD V1.04
Pin definition :
PIO8 connects with LED cathodea with 470ohm series resistor in between.
LED NEGATIVE connects to ground.
It is used to indicate the module state. After powered on, flashing intervals differ in
different states.
PIO9 is used to control LED indicating paring. It will be steady on when paring is
successful.
PIO11, module state switching pin. HIGH -> response to AT command; LOW or floating
-> regular work status.
With build-in reset circuit, reset is completed automatically after powered on.
Steps to set to MASTER:
Set PIO11 HIGH with a 10K resistor in between.
Power on, module comes into AT Command Response Status
Open HyperTerminal or other serial tool, set the baud rate 38400, 8 data bits, 1 stop
bit, no parity bit, no Flow Control Via serial port, send characters "AT + ROLE = 1 r n",
if successful, return "OK r n", where r n is carriage return.
Set PIO11 LOW, re-power, then in Master state, automatically search for slave module
and connect.
16
2:1 Mux 74LS157
17
Shift Register 74LS164
18
Some Extra Stuff
1.
P.5 Arduino & Processing . Add Patch to allow String2Float and Float2String conversion.
See blog http://www.timewasters-place.com/arduino-string-and-float/
Replace C:/Program Files/Arduino/hardware/arduino/cores/arduino/Wstring.[h,cpp] with those from site.
String example1
example1
String example2
example1
=
=
=
=
String(1.852); // Equals: "1.852000"
String(1.852, 2); // Equals: "1.85"
String(example1.toFloat() * 1.784561, 4); // Equals: "3.3014"
example2 + 1.58356; // Equals: "3.30141.583560", since the example2 variable
is of type String the number gets converted into String and concatenated.
This is patch for Arduino 1.03-1.05 releases. The next releases from Arduino are 1.5.# not yet made public.
This was an attempt to make writes more stable, however; it behaved the same.
2.
The PLX-DAQ works well but does not allow any other interaction than reporting collected data. It’s fast and easily but limited.
3.
The current LCD display is power starved (driven by USB). Once better rails are applied POTS will be added to VO and A-K, allowing
Variable back light intensity and the correct contrast. This will sharpen the LCD appearance.
4.
Will use 6 pins digital P16-21, which will drive LS74164 and SPLC780d. The E[2:1] and RW connections are not necessary; adding
various external logic will eliminate E[2:1] and RW is always tied LOW, write. Change to 4 pin interface, p.12 .
5.
The LCD has 2 font capabilities 5x10 & 5x7 ;how ever, only the 5x10 display can be chosen. I also had problem selecting the
desired cursor control. Wanted to just move cursor to a given address and write backwards (w/o shifting the display). This would
have made printing to LCD cleaner, all values to LCD and PC are String values and keeping decimal place works best right to left.
I was able to set up close to this but cursor movement is left to right.
The need to write to specific locations allows print on change and also a non-flashy display. The LCD display looks just like the
Processing BOX on the PC just not quite as fast.
6.
Future plan is to add another MEGA to work in tandem as both master and slave Would like to control clock frequency based on
data, as well as alter PWM to several servo’s based on data. Not yet clear but RX/TX3 can readily be reassigned and the 32 bit bus
may also play a role B/W the two. I’m leaning toward receiving info via the digital write to the LCD and possible returning info
via RX/TX3.
19
More Stuff
7.
Will eliminate Arduino’s pin 19, program name E which drives the LCD capture clock. Using a counter clocked by CK, a count of 8 will clock E. TTL logic
74LS163 a 4 bit binary counter and will be decoded by 8. May seem asynchronous but not, it’s in correct time frame.
20