MESA 7i93 PWM question - motor rotation direction switch

Dear All,

I try to set up 7i93 PWM control for my ATC motor and I struggle with its rotation direction change, meaning:

- if pwmgen.0.value = positive number, pwm signal is on PIN6 as expected, motor rotates clockwise.
- if pwmgen.0.value = negative number, there is no PWM signal on PIN8, motor does not rotate at all.

I use PWM controlled mosfet bridge which expects CW and CCW input PWM signals on TTL level.
Regardless of pwmgen.output-type it does not work, but based on hostmot2 manual in my understanding it should work with output-type 2.
7i93's firmware is standard.

What do I wrong, or how can I change the rotation direction with PWM if my motor drive expects CW and CCW PWM signals?

thank you for your help.
Regards,
Tamas
 

What does:

mesaflash --device ethernet --addr [card_ip_address] --readhmid 

report?

 

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: DPLL
  There are 1 of DPLL in configuration
  Version: 0
  Registers: 7
  BaseAddress: 7000
  ClockFrequency: 100.000 MHz
  Register Stride: 256 bytes
  Instance Stride: 4 bytes

  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 4 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 4 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     Sec. Pin func   Sec. Pin Dir

 1                      0   IOPort       QCount           1        Quad-B          (In)
 3                      1   IOPort       QCount           1        Quad-A          (In)
 5                      2   IOPort       QCount           0        Quad-B          (In)
 7                      3   IOPort       QCount           0        Quad-A          (In)
 9                      4   IOPort       QCount           1        Quad-IDX        (In)
11                      5   IOPort       QCount           0        Quad-IDX        (In)
13                      6   IOPort       PWM              1        PWM             (Out)
15                      7   IOPort       PWM              0        PWM             (Out)
17                      8   IOPort       PWM              1        Dir             (Out)
19                      9   IOPort       PWM              0        Dir             (Out)
21                     10   IOPort       PWM              1        /Enable         (Out)
23                     11   IOPort       PWM              0        /Enable         (Out)
25                     12   IOPort       QCount           3        Quad-B          (In)
27                     13   IOPort       QCount           3        Quad-A          (In)
29                     14   IOPort       QCount           2        Quad-B          (In)
31                     15   IOPort       QCount           2        Quad-A          (In)
33                     16   IOPort       QCount           3        Quad-IDX        (In)
35                     17   IOPort       QCount           2        Quad-IDX        (In)
37                     18   IOPort       PWM              3        PWM             (Out)
39                     19   IOPort       PWM              2        PWM             (Out)
41                     20   IOPort       PWM              3        Dir             (Out)
43                     21   IOPort       PWM              2        Dir             (Out)
45                     22   IOPort       PWM              3        /Enable         (Out)
47                     23   IOPort       PWM              2        /Enable         (Out)

IO Connections for P1
Pin#                  I/O   Pri. func    Sec. func        Chan     Sec. Pin func   Sec. Pin Dir

 1                     24   IOPort       StepGen          0        Step/Table1     (Out)
 3                     25   IOPort       StepGen          0        Dir/Table2      (Out)
 5                     26   IOPort       StepGen          0        Table3          (Out)
 7                     27   IOPort       StepGen          0        Table4          (Out)
 9                     28   IOPort       StepGen          0        Table5          (Out)
11                     29   IOPort       StepGen          0        Table6          (Out)
13                     30   IOPort       StepGen          1        Step/Table1     (Out)
15                     31   IOPort       StepGen          1        Dir/Table2      (Out)
17                     32   IOPort       StepGen          1        Table3          (Out)
19                     33   IOPort       StepGen          1        Table4          (Out)
21                     34   IOPort       StepGen          1        Table5          (Out)
23                     35   IOPort       StepGen          1        Table6          (Out)
25                     36   IOPort       StepGen          2        Step/Table1     (Out)
27                     37   IOPort       StepGen          2        Dir/Table2      (Out)
29                     38   IOPort       StepGen          2        Table3          (Out)
31                     39   IOPort       StepGen          2        Table4          (Out)
33                     40   IOPort       StepGen          2        Table5          (Out)
35                     41   IOPort       StepGen          2        Table6          (Out)
37                     42   IOPort       StepGen          3        Step/Table1     (Out)
39                     43   IOPort       StepGen          3        Dir/Table2      (Out)
41                     44   IOPort       StepGen          3        Table3          (Out)
43                     45   IOPort       StepGen          3        Table4          (Out)
45                     46   IOPort       StepGen          3        Table5          (Out)
47                     47   IOPort       StepGen          3        Table6          (Out)

 

Are you sure you have the pinout correct?

PWM 0 uses 50 pin connector pins 15,19,23

yes, I meant pin numbers as they are shown in the I/O column, but you are right I had a mistake as I tried to configure pwm1, but I experienced the same behavior with pwm0 on i/o pins 7 and 9.
if I use multimeter I see between 2,5..4V signal on pin6 (depends on the value, of course) but nothing on pin8. (corresponding 50pin numbers are 13,17)
/enable signals work properly.
thx

Does DIR change in output type 0?

(maybe there's a hardware issue)