Help with Mesa cards

Hi guys,
Before to ask my questions, let me shortly described my project.
I start to rebuild my CNC with structure more rigid than all in profile. For that I machined new parts in aluminium (paint in blue in picture below). Mechanically, it is OK.
   

Concerning software, I use Mint 19.3 with linuxcnc 2.8.2. Mesaflash and hm2 with 5i25 folder from supplier are installed.

Like PLC I used arduino Mega + ethernet shield + relay.
Arduino allow me to control light (LED RGB), relay for pump, laser and others options.
I create pyvcp panel, configured custom_postgui.hal and write a code in python for interact with arduino through ethernet connexion. That work pretty well.

Before rebuilded my CNC I used chinese controler (A145A) and DM542 drivers for control my steppers motors.
For increasing accuracy I add linear encoders (X, Y1 and Y2) and then buy Mesa 6i25 and 7i77 for control all.

But it seems that I make a confusion between servo and stepper.
Then I cannot used my 7i77 for control stepper.

Can you confirm my mistake?
Can I used my chinese controller connected to P3 of 6i25 (P2 will used for 7i77)? or buying 7i76 is unavoidable.
If yes, which .bit I can flash?

When I load PNCconf it seems that linuxcnc don't recognize my 6i25 card.

As you can see there are not card specified after "Mesa0 PCI/ETH0/Parport Card:" It is normal?




below my actual configuration flash on mesa 6i25:

Configuration Name: HOSTMOT2

General configuration information:

  BoardName : MESA5I25
  FPGA Size: 9 KGates
  FPGA Pins: 144
  Number of IO Ports: 2
  Width of one I/O port: 17
  Clock Low frequency: 33.3333 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: 33.333 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: 33.333 MHz
  Register Stride: 256 bytes
  Instance Stride: 4 bytes

  Module: MuxedQCount
  There are 8 of MuxedQCount in configuration
  Version: 3
  Registers: 5
  BaseAddress: 3600
  ClockFrequency: 33.333 MHz
  Register Stride: 256 bytes
  Instance Stride: 4 bytes

  Module: MuxedQCountSel
  There are 1 of MuxedQCountSel in configuration
  Version: 0
  Registers: 0
  BaseAddress: 0000
  ClockFrequency: 33.333 MHz
  Register Stride: 256 bytes
  Instance Stride: 4 bytes

  Module: SSerial
  There are 1 of SSerial in configuration
  Version: 0
  Registers: 6
  BaseAddress: 5B00
  ClockFrequency: 33.333 MHz
  Register Stride: 256 bytes
  Instance Stride: 64 bytes

  Module: StepGen
  There are 5 of StepGen in configuration
  Version: 2
  Registers: 10
  BaseAddress: 2000
  ClockFrequency: 33.333 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: 33.333 MHz
  Register Stride: 256 bytes
  Instance Stride: 4 bytes

Configuration pin-out:

IO Connections for P3
Pin#                  I/O   Pri. func    Sec. func       Chan      Pin func        Pin Dir

 1                      0   IOPort       StepGen          0        Dir/Table2      (Out)
14                      1   IOPort       StepGen          0        Step/Table1     (Out)
 2                      2   IOPort       StepGen          1        Dir/Table2      (Out)
15                      3   IOPort       StepGen          1        Step/Table1     (Out)
 3                      4   IOPort       StepGen          2        Dir/Table2      (Out)
16                      5   IOPort       StepGen          2        Step/Table1     (Out)
 4                      6   IOPort       StepGen          3        Dir/Table2      (Out)
17                      7   IOPort       StepGen          3        Step/Table1     (Out)
 5                      8   IOPort       StepGen          4        Dir/Table2      (Out)
 6                      9   IOPort       StepGen          4        Step/Table1     (Out)
 7                     10   IOPort       SSerial          0        TXData0         (Out)
 8                     11   IOPort       SSerial          0        RXData0         (In)
 9                     12   IOPort       SSerial          0        TXData1         (Out)
10                     13   IOPort       SSerial          0        RXData1         (In)
11                     14   IOPort       MuxedQCount      3        MuxQ-IDX        (In)
12                     15   IOPort       MuxedQCount      3        MuxQ-B          (In)
13                     16   IOPort       MuxedQCount      3        MuxQ-A          (In)

IO Connections for P2
Pin#                  I/O   Pri. func    Sec. func       Chan      Pin func        Pin Dir

 1                     17   IOPort       SSerial          0        TXEn4           (Out)
14                     18   IOPort       SSerial          0        TXData4         (Out)
 2                     19   IOPort       SSerial          0        RXData4         (In)
15                     20   IOPort       SSerial          0        TXData3         (Out)
 3                     21   IOPort       SSerial          0        RXData3         (In)
16                     22   IOPort       SSerial          0        TXData2         (Out)
 4                     23   IOPort       SSerial          0        RXData2         (In)
17                     24   IOPort       MuxedQCountSel   0        MuxSel0         (Out)
 5                     25   IOPort       MuxedQCount      0        MuxQ-A          (In)
 6                     26   IOPort       MuxedQCount      0        MuxQ-B          (In)
 7                     27   IOPort       MuxedQCount      0        MuxQ-IDX        (In)
 8                     28   IOPort       MuxedQCount      1        MuxQ-A          (In)
 9                     29   IOPort       MuxedQCount      1        MuxQ-B          (In)
10                     30   IOPort       MuxedQCount      1        MuxQ-IDX        (In)
11                     31   IOPort       MuxedQCount      2        MuxQ-A          (In)
12                     32   IOPort       MuxedQCount      2        MuxQ-B          (In)
13                     33   IOPort       MuxedQCount      2        MuxQ-IDX        (In

A 7I77 is made for analog servo systems, a 7I76 makes
more sense for a step/dir system

Thanks PCW for informations. That confirm what I think.

My chinese controller:
 
 
 

 

OK that should be driveable directly from the FPGA card

Thank for your help.
I will buying a 7i76 card, it is more straighforward.