Thanks for the patience (seems to be a common theme with many variations) - I'll attempt to document in workflow for others.
Ok so i've added a 5th encoder (at some point i will add axis encoders and these are already wired) and linked A to the tacho line i have connected on I/O 46. This was by following the guide here [
wiki.linuxcnc.org/cgi-bin/wiki.pl?Editing_MESA_Bitfiles
] by making up a new bit file to add and assign an additional encoder (only the A line connected to the outside world).
Then loaded/flashed to the MESA 7i93 board, in my case by using;
Code:
sudo mesaflash --device 7i93 --addr 192.168.1.121 --write 7i93_svst2_4d_5.bit
Then readout to test
Code:
david@linuxcnc:~$ mesaflash --device 7i93 --readhmid
Configuration Name: HOSTMOT2
General configuration information:
BoardName : MESA7I93
FPGA Size: 9 KGates
FPGA Pins: 144
Number of IO Ports: 2
Width of one I/O port: 24
Clock Low frequency: 100.0000 MHz
Clock High frequency: 200.0000 MHz
IDROM Type: 3
Instance Stride 0: 4
Instance Stride 1: 64
Register Stride 0: 256
Register Stride 1: 256
Modules in configuration:
Module: WatchDog
There are 1 of WatchDog in configuration
Version: 0
Registers: 3
BaseAddress: 0C00
ClockFrequency: 100.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Module: IOPort
There are 2 of IOPort in configuration
Version: 0
Registers: 5
BaseAddress: 1000
ClockFrequency: 100.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Module: QCount
There are 5 of QCount in configuration
Version: 2
Registers: 5
BaseAddress: 3000
ClockFrequency: 100.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Module: PWM
There are 2 of PWM in configuration
Version: 0
Registers: 5
BaseAddress: 4100
ClockFrequency: 200.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Module: StepGen
There are 4 of StepGen in configuration
Version: 2
Registers: 10
BaseAddress: 2000
ClockFrequency: 100.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Module: LED
There are 1 of LED in configuration
Version: 0
Registers: 1
BaseAddress: 0200
ClockFrequency: 100.000 MHz
Register Stride: 256 bytes
Instance Stride: 4 bytes
Configuration pin-out:
IO Connections for P2
Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir
1 0 IOPort StepGen 0 Step/Table1 (Out)
3 1 IOPort StepGen 0 Dir/Table2 (Out)
5 2 IOPort StepGen 1 Step/Table1 (Out)
7 3 IOPort StepGen 1 Dir/Table2 (Out)
9 4 IOPort QCount 0 Quad-A (In)
11 5 IOPort QCount 2 Quad-A (In)
13 6 IOPort QCount 0 Quad-B (In)
15 7 IOPort QCount 2 Quad-B (In)
17 8 IOPort QCount 0 Quad-IDX (In)
19 9 IOPort QCount 2 Quad-IDX (In)
21 10 IOPort QCount 1 Quad-A (In)
23 11 IOPort QCount 3 Quad-A (In)
25 12 IOPort QCount 1 Quad-B (In)
27 13 IOPort QCount 3 Quad-B (In)
29 14 IOPort QCount 1 Quad-IDX (In)
31 15 IOPort QCount 3 Quad-IDX (In)
33 16 IOPort StepGen 2 Step/Table1 (Out)
35 17 IOPort StepGen 2 Dir/Table2 (Out)
37 18 IOPort StepGen 3 Step/Table1 (Out)
39 19 IOPort StepGen 3 Dir/Table2 (Out)
41 20 IOPort PWM 0 PWM (Out)
43 21 IOPort PWM 0 Dir (Out)
45 22 IOPort PWM 1 PWM (Out)
47 23 IOPort PWM 1 Dir (Out)
IO Connections for P1
Pin# I/O Pri. func Sec. func Chan Pin func Pin Dir
1 24 IOPort None
3 25 IOPort None
5 26 IOPort None
7 27 IOPort None
9 28 IOPort None
11 29 IOPort None
13 30 IOPort None
15 31 IOPort None
17 32 IOPort None
19 33 IOPort None
21 34 IOPort None
23 35 IOPort None
25 36 IOPort None
27 37 IOPort None
29 38 IOPort None
31 39 IOPort None
33 40 IOPort None
35 41 IOPort None
37 42 IOPort None
39 43 IOPort None
41 44 IOPort None
43 45 IOPort None
45 46 IOPort QCount 4 Quad-A (In)
47 47 IOPort None
So the next step is to update the hal, i'm struggling got find a clear explanation of how the spindle encoder is read out. The information in [
www.linuxcnc.org/docs/html/examples/spindle.html
] seems to be for software encoder. Any good threads or suggestions?
