I have several ip cameras which monitor movement in and around our home.
I’m using Zoneminder and other home automation systems but i want to scan through a bunch of files uploaded by the security cameras to my secondary fileserver.
So what is interesting?
Major movement compared to a base image
Movement compared to a previous uploaded image
Setting a threshold when to output information (note the 65% mark)
Looking at the output we see: At 76% of the captured images (image 1438) the threshold was above 3000 and the minus gives us the information of the difference between this image and the previous, the X marks the difference between current image and the baseline. | percent | image number | filename | difference | graphbar
Bash script:
#!/bin/bash
threshold=3000
baseline=$( ls SDAlarm*jpg | head -1)
previous=$( ls SDAlarm*jpg | head -1)
total=$( ls *.jpg |wc -l)
echo "Number of files : $total"
nr=1
ls *jpg | while read; do
graph="....................................................................................................."
diff=$(compare -verbose -metric MAE $baseline $REPLY /dev/null 2>&1 | grep all | awk '{ print $2 }' | cut -f1 -d. )
prevdiff=$(compare -verbose -metric MAE $previous $REPLY /dev/null 2>&1 | grep all | awk '{ print $2 }' | cut -f1 -d. )
line=$( echo "100 / $total * $nr" | bc -l | cut -f1 -d.)
line=$(( $line + 1))
#echo -n "$line | $nr | $REPLY | "
#echo $diff
draw1=$(( $diff / 100 + 1))
draw2=$(( $prevdiff / 100 + 1))
graph=$(echo $graph | sed "s/./X/$draw1")
graph=$(echo $graph | sed "s/./-/$draw2")
if [ $diff -gt $threshold ] ; then
printf "| %4s %% | %3s | %30s | %5s | %102s \n" $line $nr $REPLY $diff $graph
fi
nr=$(( $nr +1 ))
previous=$REPLY
done
Want to see only difference with previous image?
change:
if [ $diff -gt $threshold ] ; then into if [ $prevdiff -gt $threshold ] ; then
I bought a XT Laser/3 a while ago. And i wanted to get my old programs running on it again.
One of the disk i found was a 5.25 inch boot disk which should contain a boot demo i’ve made in the past with Edk. But it is the secondary drive in this system. Those old machines lack a bios you can change. And change A: for B: for example. Some machines had a program which could alter boot settings. (not this one) So i was playing with jumpers and dipswitches on the motherboard. ( Drive select / Termination / drive before or after the twist in the flatcable. )
Dipswitches on the motherboard
Wellll leave the boot order for now, i needed to get software on the machine using floppy’s. I could not find empty HD disks (1.44MB which i wanted to use) So i took a DD disk and a drill ..
(Image from the internet)
I bought an external usb floppy drive.
Now i have everything to get my programs on the msdos machine.
EXCEPT ….
Diskette didn’t work in the drives. So i bought new old stock diskettes online.
Now i have everything
WRONG again
Formatted 1.44 disk in USBfloppy drive .. OK Read in 3.5 drive on the MSDOS machine .. NOT OK Check drive in MSDOS machine .. is 1.44MB .. OK … check floppy controller in MSDOS machine .. NOT OKAY (720kb is 300kbits per second and 1.44 HD 500kbits per second) So i’m limited to 720kb due to the controller ..
Can the USB Floppy drive read/write 720kb disks .. NO! ( A cheap series made with drives only supporting HD disks )
Alternatives? .. Serial maybe, there is Norton Commander on the MSDOS machine so i could use “link”
Do i still have a USB-RS232 sub-d cable ? YES! Nullmodem cable? NO Make a null modem cable .. i’ve made those before .. BUT no sub-d connectors.
I’ve been throwing away too much in the past.
Now i have to buy those things again:
VGA – 8bit ISA – have 2 now Floppy drive – have one for 1.44 8bit soundblaster compatible – TODO Nullmodem – well i’ve bought connectors for those
I’m using domoticz as a 433->mqtt bridge, and some virtual devices i can toggle with curl (bash scripts)
I needed to make a custom 433 door sensor in Home Assistant with toggles to OFF after a few seconds. (There is NO off signal in this cheap sensor i’m using)
I’m changing the payload complete, to have a payload which matches the device class for door: (state with on/off) It was nvalue = 0/1
(Whenever the IDX changes, I only have to update this Nodered part) HA won’t notice the change.
var nvalue = msg.payload.nvalue;
msg.payload = {};
if(nvalue == 1)
{
msg.payload.state = "ON";
return msg;
}
AND after 5 seconds
msg.payload = {};
msg.payload.state = "OFF";
return msg;
download the package with used files and compilers from here: https://media.henriaanstoot.nl/assembly.tgz
extract with tar xzvf /tmp/assembly.tgz to a directory
start dosbox and mount the directory as C
mount c /path/assembly
Run “a line”, this a batchfile which starts the editor (qedit) When closing the file (esc – q menu) It will compile the assembly and write out a executable
This is the batchfile
@echo off
q %1.asm
cls
masm %1.asm;
link %1.obj;
exe2bin %1.exe %1.com
echo READY!
line assemblycode
NAME lijnentrekroutine
.286
Code SEGMENT
ASSUME CS:Code,DS:Code
org 100h
Start:
mov ax,13h ;set video mode
int 10h
mov bx,100
mov cx,100
hiero:
mov dx,0a000h
mov es,dx
mov ax,320
mul cx
add ax,bx
mov di,ax
mov al,2
stosb
inc bx
inc bx
inc cx
cmp bx,150
jnz hiero
mov ah,8
int 21h
mov ax,3
int 10h
MOV AX,4C00h
INT 21h
code ends
end start
While playing with MuseScore…. (Typesetting some scores for Pipes and Flute)
This came in: WOOOT
Trident 8900C (1024 x768 max 512Kb)
This is a Trident VGA card. While having a 16bit ISA connector, it can work in a 8bits ISA slot.
A while ago i bought a Laser XT/3, that’s the one my parents had. This is where i did a lot of assembly programming on. It’s a 8086 cpu, 640K and has a Hercules/CGA graphics card.
I found loads of assembly files and i want to see if i can get it running again. While some code was written for hercules, ( That’s the monochrome image you see in the example above ) and a few for EGA (4 colors).
Most of it was written for VGA. Probably on a later machine like a 80386?
But i know there are vga cards for 8 bit msdos computers, and i found one. ( This one is even autodetect, so no jumpers to figure out)
So i’ve put this card in the machine, turned it on, and it works! I’ve got only 2 examples living on the harddisk of the machine, both black and white … 🙂 I have to search for interesting code in hundreds of files.
Some friends of mine, picture was taken from an amiga genlock digitizerThe intro pages of a “amiga emulator” WHERE is the rest??? (end is a cga starfield demo)
And a boot demo, which was able to start from a bootsector, went into a graphic mode and ran a demo with sound. Edk wrote a sector loader for this. I have some 5.25 inch floppy disks, labelled boot demo. So i wanted to try this today … I needed to change the boot order, so i went online to search for jumper settings.
I see a led when it tries to boot, but my disks are probably formatted 720Kb instead of 360Kb, which this drive is.
So …. TODO!
Find a 720Kb floppy drive (5.25 inch), and sort through my code! There is a 8bit soundblaster compatible soundcard that i bidding on online, hopefully i’ll get it
Assembly and modes
I wasn’t sure how to sort the assembly code into Hercules and VGA compatible, but i used this table (There are also extended modes for higher resolutions)
mode 0x00
text 40×25 gray
mode 0x01
text 40×25 16 colors
mode 0x02
text 80×25
mode 0x03
text 80×25 16 color
mode 0x04
graphics mode (CGA) 320×200
mode 0x05
graphics mode (CGA) 320×200
mode 0x06
graphics mode (CGA) 640×200 (B/W)
mode 0x07
text 80×25 Hercules
mode 0x0F
graphics mode 640×350? gray
mode 0x10
graphics mode 640×350?
mode 0x11
graphics vga 2 colors
mode 0x12
graphics vga 16 colors
mode 0x13
graphics 320×200 256 colors
# Set VGA mode
mov ax,13h
int 10h ;screen 320x200 256 colours
# Exit VGA mode
mov ax,3
int 10h ;screen 80x25 text
mov ax,4c00h
int 21h ;back to DOS
Sometimes when i’m writing code i want to know what’s happening. For example when i’m working on the display, there is maybe no output. With the above example i can write to address $01F0 (example address), and it will display on the 7 Segment displays.
Upperleft PLD is my address decoder, which has been running for a while now.
Secondary PLD adds the rest of the Addressbus lines, and gives me the opportunity to select in a range of 16 addresses, using jumpers/
The two smaller PLD’s latch the databus data when addressed. AND decodes a nibble to 7-Segment output for 0-9A-F. (There are apparently no chips available which do A-F)
I’m going to add the PLD code when everything works. Let me know if you like the idea.
No more sync issues! (see post https://www.henriaanstoot.nl/2022/10/19/composite-video-with-atmega328p/ )
There are some duplicate characters, the input device below does not have a proper debounce method.
My temporary input device (note hex 21 is a “!” character)
No need to fix the debounce, the dipswitches are temporary. This will be controlled by the VIA 6522 chip.
UPDATE 20221108 (Connected to second VIA)
PORTB = $5000
PORTA = $5001
DDRB = $5002
DDRA = $5003
clock = $e0
E = %10000000
RW = %01000000
RS = %00000000
.org $0200
reset:
ldx #$ff
txs
lda #%11111111 ; Set all pins on port B to output
sta DDRB
lda #%10000000 ; Set top pin on port A to output
sta DDRA
lda #$00 ; reset bit
sta PORTA
sta clock
ldx #0
print:
lda message,x
beq printborder
jsr print_char
inx
jmp print
loop:
jmp loop
message:
.db 0x01,0x04,0x0C,0x0E,0x10,0x0F,0x08
.db 0x05,0x0a,0x0a
.db 0x05,0x0b,0x0b
.asc "Composite Video 6502 - 20221108"
.db 0x0E,0x11,0x0F,0x0C
.asciiz " With 2 pixels "
waitloop:
pha
tya
pha
ldy #$ff
back:
dey
bne back
pla
tay
pla
rts
print_char:
sta PORTB
jsr waitloop
jsr waitloop
lda clock
eor #%10000000
sta clock
sta PORTA
jsr waitloop
lda clock
eor #%10000000
sta PORTA
jsr waitloop
rts
Control codes as from : http://searle.x10host.com/MonitorKeyboard/index.html
Video display control codes:
Hex (Decimal) and meaning
01 (01) - Cursor home (Standard ASCII)
02 (02) - Define cursor character (2nd byte is the curs character, or 00 to turn off) <--New for 3.0
03 (03) - Cursor blinking
04 (04) - Cursor solid
05 (05) - Set graphics pixel (next two bytes = x,y) <--New for 3.0
06 (06) - Reset graphics pixel (next two bytes = x,y) <--New for 3.0
08 (08) - Backspace (Standard ASCII)
09 (09) - Tab (Standard ASCII)
0A (11) - Linefeed (Standard ASCII)
0C (12) - Clear screen (Standard ASCII)
0D (13) - Carriage return (Standard ASCII)
0E (14) - Set column 0 to 79 (2nd byte is the column number) or 0 to 39 for a 40 char line
0F (16) - Set row 0 to 24 (2nd byte is the row number)
10 (16) - Delete start of line
11 (17) - Delete to end of line
12 (18) - Delete to start of screen
13 (19) - Delete to end of screen
14 (20) - Scroll up
15 (21) - Scroll down
16 (22) - Scroll left
17 (23) - Scroll right
18 (24) - Set font attribute for the current line (see elsewhere on this page for details) <--New for 3.0
1A (26) - Treat next byte as a character (to allow PC DOS char codes 1 to 31 to be displayed on screen)
1B (27) - ESC - reserved for ANSI sequences
1C (28) - Cursor right
1D (29) - Cursor Left
1E (30) - Cursor up
1F (31) - Cursor down
20 (32) to 7E (126) - Standard ASCII codes
7F (127) - Delete
80 (128) to FF (255) - PC (DOS) extended characters
I’m using a windows program for typesetting bagpipe music. Luckily this runs on Linux using wine.
Sometimes i just want a PDF version of a tune, for example for my tunebook compiler. (Other post) Or i want to batch convert a lot of bww files.
A long time ago i used a virtual machine with automation software for this. Why not automate the process on my Laptop?
So i made this script, with a workaround for the xdotool wine problem. (wine window needs to be active to accept key strokes, other linux xwindows you can use the ID of the window)
#!/bin/bash
# use c for close at the end, without c bgplayer wont be shut down
# bww2pdf path/to/music.bww c
# make tmp file
cat "$1" > /tmp/deze.bww
# start bgplayer if not started .. if not started wait 3 secs
slp=0
pgrep BGPlayer.exe >/dev/null || slp=3
pgrep BGPlayer.exe >/dev/null|| ( nohup wine ~/.wine/dosdevices/c\:/Program\ Files\ \(x86\)/Bagpipe\ Player/BGPlayer.exe & )
sleep $slp
# get program id
pid=$(pgrep BGPlayer.exe)
# get xwindow id using pid
winid=$(xdotool search --limit 1 --all --pid $pid)
# activate window
xdotool search --desktop 0 --class "BGPlayer.exe" windowactivate
# open file menu and Open file
xdotool key --window $winid "alt+f"
xdotool key --window $winid "o"
# give program time to execute
sleep 1
# open our tmp file
xdotool type '\tmp\deze.bww'
xdotool key KP_Enter
sleep 2
# open file menu select Print and PDF as output
xdotool key "alt+f"
xdotool key "p"
xdotool key "P"
sleep 2
# execute
xdotool key KP_Enter
sleep 1
# File close
xdotool key "alt+f"
xdotool key "c"
sleep 2
# close program when c was added to commandline
mv ~/PDF/deze* "$1.pdf"
if [ "$2" == "c" ] ; then
xdotool key "alt+f"
xdotool key "x"
fi
I’m not touching the keyboard when the program is running, all handled by the script
