BrundleFab printhead controller
-------------------------------
Drives a 96DPI HP C6602A printhead, with a travel of 8.75"
Each dotline drives 12 nozzles
Pinout:
-------
0 RX
1 TX
2 --
3 Encoder A
4 Encoder B
5 INK_PULSE
6 --
7 --
8 MOTOR_B_BRAKE
9 MOTOR_A_BRAKE
10 MOTOR_A_PWM
11 MOTOR_B_PWM
12 MOTOR_A_DIR
13 MOTOR_B_DIR
A0 INK_A
A1 INK_B
A2 INK_C
A3 INK_D
A4 I2C SDA
A5 I2C SCL
Serial commands:
----------------
Command is a newline termininated string, of the form:
Cnnn
'C' is the command, and 'nnn' is the parameter.
Status report response to a command:
=> "ok SS I NNN LL MMM KKK\n" - ? command
=> "ok\n" - all other commands
==> "!!\n" - error
SS:
Bit 0 - Motor on
Bit 1 - Motor stalled
Bit 2 - Motor min endstop
Bit 3 - Motor max endstop
Bit 4 - Heater on
Bit 5 - Heater at or above temp
Bit 6 - Ink spraying
Bit 7 - Ink tank empty (todo, always 0)
I:
Ink sprays per dotline
NNN:
Entries left in dotline buffer
LL:
Line number (incremented after this command)
MMM:
Dotline position
KKK:
Thermopile reading in tenths of degrees of kelvin
Commands:
Up to 4 characters, terminated by a space characters (ie '\r', '\n', etc)
"lXXX"
Add 12-bit pattern to dotline buffer
(a dotline is 1/96th of an inch, or 0.2646 mm)
"rXXX"
Repeat last dot line NNN+1 times
"?"
No-op - return status
"h"
Reset dot line buffer, move to start
"i"
Ink - Start inking from here till end of dotline
"j"
Jump-back - Start inking from here till start of dotline
"k"
Kill - Cancel movement, clear dotline buffer
"nXXX"
Number - set current 12-bit line number (wrapping) to X
"sX"
Set number of sprays/dotline - 1
# vim: set shiftwidth=4 expandtab: