FIP8XM8 - VDR VF- Display

fip8xm8.jpg

Key features

  • raw display access
  • over 50 FPS1), nice for viewing bargraphs
  • nearly 500Hz refresh-rate
  • making use of cool custom VDR displays
  • using a dual-access SRAM (writing and reading)
  • writing to SRAM via USB endpoint zero-calls
  • no kernel module, using libusb via usermode
  • special commands for changing the brightness
  • low-cost parts

Hardware

Pins

RegExp used

  • G[0-9]{1} are gates, counting starts on the left side
  • [a-e]{1}[0-6]{1} are points of the dot-matrix
  • italic items are unnecessary (cos they've been occured already)
  • *bold* itmes are special segments, explained later
  • H+ and H- are for heating the display (~3V)


VFD mapping

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
H+ H+ H+ G0 c3 d3 e3 G0 a4 b4 c4 G0 d4 e4 a5 G1 b5 c5 d5
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
e5 G2 a6 b6 c6 d6 G3 e6 G4 G5
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
G6 G7 a0 b0 c0 d0 G8 e0 a1 b1 G9 c1 d1 e1 a2 b2
60 61 62 63 64 65 66 67 68 69 70
G9 c2 d2 e2 a3 b3 G9 H- H- H-

dot-matrix mapping

a b c d e
0 o o o o o
1 o o o o o
2 o o o o o
3 o o o o o
4 o o o o o
5 o o o o o
6 o o o o o

special or gate-dependant items

Gate 0
  • [A-G]{1}[0-2]{1} 7-segment item

= 7 segment mapping =

-A-
| F |B
-G-
|E |C
-D-
.H
5 6 7 9 10 11 13 14 18 19 20 22 23 27
B2 E2 F2 G2 B2 A2 D2 C2 E1 F1 G1 C1 D1 B0, C0
Gate 3
44
.
Gate 7
44
:
Gate 9
  • [0-9]{1,2} VFD- bargraph
  • S[1-4] square 1-4
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
| | | | | | | | | | | | | | | |
47 48 49 51 52 53 55 56 57 58 59 61 62 63 64 65
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
5 6 7 9 10 17 27 42 43 44 46
S4 S3 S2 S1 TIMER Input- Symbol MAC A B STEREO SIGNAL

MAX6921 output-mapping

I'm using the MAX6921 as VFD driver: MAX6921, MAX6931 manual

NOTE: it's an own mapping, not compatible with for example the MAX6852

left

MAX VFD item
OUT19 9 a4
OUT18 10 b4
OUT17 11 c4
OUT16 13 d4
OUT15 14 e4
OUT14 15 a5
OUT13 17 b5
OUT12 18 c5
OUT11 19 d5
OUT10 20 e5
OUT9 22 a6
OUT8 23 b6
OUT7 24 c6
OUT6 25 d6
OUT5 27 e6
OUT4 44 ??
OUT3
OUT2
OUT1
OUT0

right

MAX VFD item
OUT19 46 a0
OUT18 47 b0
OUT17 48 c0
OUT16 49 d0
OUT15 51 e0
OUT14 52 a1
OUT13 53 b1
OUT12 55 c1
OUT11 56 d1
OUT10 57 e1
OUT9 58 a2
OUT8 59 b2
OUT7 61 c2
OUT6 62 d2
OUT5 63 e2
OUT4 64 a3
OUT3 65 b3
OUT2 5 c3
OUT1 6 d3
OUT0 7 e3

middle

MAX VFD item
OUT9 54 G9
OUT8 50 G8
OUT7 45 G7
OUT6 40 G6
OUT5 35 G5
OUT4 30 G4
OUT3 26 G3
OUT2 21 G2
OUT1 16 G1
OUT0 04 G0

internal SRAM- mapping of the ez-usb

1) frames per second
 
wiki/projects/hardware/fip8xm8.txt · Last modified: 2005/05/22 19:57 by e-razor
 
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