2 layers44.5 × 46.9 mm
OSO SWAT B1-jig
joeycastillo/Sensor-Watch
A board replacement for the classic Casio F-91W wristwatch
31 parts2.1k
2 layers51 × 20 mm
Pi400VGA
llegoff/Pi400VGA16VGA interface for Raspberry pi 400
- Size
- 51 × 20 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 47
- Pads
- 117
- Tracks, vias
- 234, 13
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Dec 2020
- Updated
- 6 Apr 2022
Overview
Pi400VGA is an open-source printed circuit board by llegoff, from the llegoff/Pi400VGA repository on GitHub. It is a 2-layer board of 51 × 20 mm with 31 parts on 47 nets, routed with 234 tracks and 13 vias.
Its parts include 6 resistors, 4 capacitors and 3 connectors. It belongs with the interfaces and adapters boards of this library.
README
README.mdPi400VGA
VGA interface for Raspberry Pi 400
:warning: for retrogaming on CRT see Scart/VGA interface : https://github.com/llegoff/Pi400RGB
for pi zero see https://github.com/llegoff/VGA_Zero
buy on ebay :package:
DPI (Display parallel Interface)
Like VGA666, this pcb uses dpi interface (in mode 3 to free gpio 18 & 19)
see https://www.raspberrypi.org/documentation/hardware/raspberrypi/dpi/README.md
only the necessary bits of the dpi are redirected to the 40-pin GPIO port, with the 'gpio=2-8,12-17,20-24=a2' line on config.txt
/boot/config.txt
# disable i2c, pin use by h-sync & v-sync
dtparam=i2c_arm=off
# replace dtoverlay=vc4-kms-v3d with
dtoverlay=vc4-fkms-v3d
#DPI config
gpio=2-8,12-17,20-24=a2
dpi_output_format=0x13
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=16
#---------------- dpi_mode line ---------------------
#---> 640x480 60hz dpi_mode=4
#---> 800x600 60hz dpi_mode=9
#---> 1024x768 60hz dpi_mode=16
#---> 1280x768 60hz dpi_mode=23
#---> 1280x800 60hz dpi_mode=28
#---> 1280x960 60hz dpi_mode=32
#---> 1280x1024 60hz dpi_mode=35
#---> 1360x768 60hz dpi_mode=39
#---> 1366x768 60hz dpi_mode=81
#---> 1400x1050 60hz dpi_mode=42
#---> 1440x900 60hz dpi_mode=47
#---> 1600x1200 60hz dpi_mode=51Configuration working with vc4-kms-v3d
dtoverlay=vc4-kms-dpi-generic,rgb565-padhi
dtparam=hactive=800,hfp=40,hsync=128,hbp=88
dtparam=vactive=600,vfp=1,vsync=4,vbp=23
dtparam=clock-frequency=40000000
# Resolution@freq hactive hfp hsync hbp vactive vfp vsync vbp clock-frequency
#VGA 640x480 @60 640 16 96 48 480 10 2 33 25175000
#SVGA 800x600 @60 800 40 128 88 600 1 4 23 40000000
#XGA 1024x768 @60 1024 24 136 160 768 3 6 29 65000000
#VESA 1368x768 @60 1368 72 144 216 768 1 3 23 85860000
#VESA 1280x800 @60 1280 64 136 200 800 1 3 24 83460000
#VESA 1280x1024 @60 1280 48 112 248 1024 1 3 38 108000000
#VESA 1400x1050 @60 1400 88 152 240 1050 1 3 33 122660000
#VESA 1600x1200 @60 1600 64 192 304 1200 1 3 46 162000000
#--- TV -----
#244p (NTSC res)@60 320 4 30 46 240 4 5 14 6400000
#288p (PAL res) @50 384 16 32 40 288 3 2 19 7363200
#480i (NTSC res)@60 640 24 64 104 480 3 6 34 13054080
#576i (PAL res) @50 768 24 72 88 576 6 5 38 14875000
#480p @60 640 24 96 48 480 11 2 32 25452000
#720p @60 1280 110 40 220 720 5 5 20 74250000
#1080p @60 1920 88 44 148 1080 4 5 36 148500000
#more timming on http://tinyvga.com/vga-timing15khz cathode ray screen
:point_up: this config work only with Raspberry pi OS, not with Recalbox OS or RGB-Pi OS (use rpi-dpidac, who only work with dpi mode 5 & 6)
for RecalboxOS or RGB-Pi OG , see https://github.com/llegoff/Pi400RGB
# replace dtoverlay=vc4-kms-v3d with
dtoverlay=vc4-fkms-v3d
# disable i2c, pin use by h-sync & v-sync
dtparam=i2c_arm=off
gpio=2-8,12-17,20-24=a2
dpi_output_format=0x13
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
#hdmi_timings=506 1 8 48 56 240 1 3 10 6 0 0 0 60 0 9600000 1
#hdmi_timings=512 1 16 48 64 288 1 3 5 6 0 0 0 50 0 9600000 1
# Custom 15kHz mode
hdmi_timings=506 1 8 44 52 240 1 6 10 6 0 0 0 60 0 9600000 1
#hdmi_timings=320 1 17 33 34 224 1 14 8 18 0 0 0 60 0 6400000 1
#hdmi_timings=960 0 173 8 0 160 0 40 10 0 0 0 0 60 0 19200000 8
#hdmi_timings=320 1 25 30 30 240 1 9 3 10 0 0 0 60 0 6400000 1
#hdmi_timings=1920 1 52 208 260 240 1 6 10 6 0 0 0 60 0 38400000 1Recalbox
edit /boot/config.txt
find section
[pi4]
temp_soft_limit=70
dtoverlay=vc4-kms-v3dremplace with
[pi4]
temp_soft_limit=70
dtoverlay=vc4-fkms-v3dcopy content of config-example.txt to /boot/recalbox-user-config.txt
For crt mode , Recalbox 8 use driver rpi-dpidac, not compatible with dpi mode 3
see https://wiki.recalbox.com/en/tutorials/video/crt/crt-screen-dpi-vga666-piscart-rgbpi
Dual Screen (VGA + HDMI)
on the pi4 and pi400, the dual screen function is supported by the vc4 fkms v3d driver
[pi4]
# Enable DRM VC4 V3D driver on top of the dispmanx display stack
dtoverlay=vc4-fkms-v3d
max_framebuffers=2Remote Desktop MultiMonitor
install freeRDP
sudo apt-get install freerdp2-x11start freeRDP session
xfreerdp /v:<computer name or IP> /u:<user> /d:<domain> /sound:sys:alsa /multimonor
xfreerdp /v:<computer name or IP> /u:<user> /d:<domain> /g:<gateway name or IP> /gu:<gateway user> /gd:<gateway domain> /sound:sys:alsa /multimonAudio Interface
audio interface is connected to gpio 18 & 19 (PWM)
/boot/config.txt
# Enable audio for PiZero(loads snd_bcm2835)
dtoverlay=audremap,pins_18_19
dtparam=audio=onSchematic
PCB
Installation
copy content of config-example.txt to /boot/config.txt
Révision
rev1
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1K | Resistors_SMD:R_0805 | RB6, RG6, RR6 |
| 3 | 2K | Resistors_SMD:R_0805 | RB5, RG5, RR5 |
| 3 | 499 | Resistors_SMD:R_0805 | RB7, RG7, RR7 |
| 3 | 4K | Resistors_SMD:R_0805 | RB4, RG4, RR4 |
| 3 | 8K | Resistors_SMD:R_0805 | RB3, RG3, RR3 |
| 2 | 10u | Capacitors_SMD:C_0805 | C2, C4 |
| 2 | 120 | Resistors_SMD:R_0805 | R5, R6 |
| 2 | 150 | Resistors_SMD:R_0805 | R2, R4 |
| 2 | 270 | Resistors_SMD:R_0805 | R1, R3 |
| 2 | 33n | Capacitors_SMD:C_0805 | C1, C3 |
| 1 | 16K | Resistors_SMD:R_0805 | RG2 |
| 1 | AUDIO | _LaurentPerso:jack3.5smd | J3 |
| 1 | CONN_02X20 | Socket_Strips:Socket_Strip_Straight_2x20_Pitch2.54mm | J2 |
| 1 | VGA | _LaurentPerso:DB_15F-VGA | J1 |
The 29 most common of 31 parts.
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Questions
How big is the Pi400VGA PCB?
It measures 51 × 20 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Pi400VGA use?
31 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Pi400VGA KiCad files?
From the llegoff/Pi400VGA repository on GitHub, at the commit this page was made from: the board is Pi400VGA.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi400VGA design in my own project?
Its repository states no licence, so its author keeps all rights: ask llegoff before reusing the design.