---
tag: m0122
title: TMC Debugging
brief: Get TMC Debug Info
author: mbuc

since: 1.1.7
requires: HAS_TRINAMIC_CONFIG
group: debug

codes: [ M122 ]

notes:
  - '`TMC_DEBUG` is no longer needed in Marlin 2.0.x, but enabling it produces an extended report.'
  - Responses of all `LOW` (`00:00:00:00`) or all `HIGH` (`FF:FF:FF:FF`) are signs of a communication problem.<br/>
    See [TMC Troubleshooting](/docs/hardware/tmc_drivers.html) for further information.

parameters:
  -
    tag: I
    since: 2.0.6
    optional: true
    description: Flag to re-initialize stepper drivers with current settings.
  -
    tag: X
    optional: true
    description: Target X driver(s) only.
  -
    tag: Y
    optional: true
    description: Target Y driver(s) only.
  -
    tag: Z
    optional: true
    description: Target Z driver(s) only.
  -
    tag: E
    optional: true
    description: Target E driver(s) only.
  -
    tag: V
    requires: TMC_DEBUG
    optional: true
    description: Report raw register data. Refer to the datasheet to decypher.
  -
    tag: S
    requires: TMC_DEBUG, MONITOR_DRIVER_STATUS
    type: bool
    optional: true
    description: Flag to enable/disable continuous debug reporting.
  -
    tag: P
    requires: TMC_DEBUG, MONITOR_DRIVER_STATUS
    optional: true
    description: Interval between continuous debug reports, in milliseconds.
    values:
      -
        tag: ms
        type: int

examples:
  -
    pre: 'Enable debugging output:'
    code: M122 S1
  -
    pre: 'Get all (supported) Trinamic driver states:'
    code: |
      > M122
                        X       Y
      Enabled           false   false
      Set current       850     850
      RMS current       826     826
      MAX current       1165    1165
      Run current       26/31   26/31
      Hold current      13/31   13/31
      CS actual         13/31   13/31
      PWM scale 41      41
      vsense            1=.18   1=.18
      stealthChop       true    true
      msteps            16      16
      tstep             1048575 1048575
      pwm
      threshold         0       0
      [mm/s]            -       -
      OT prewarn        false   false
      OT prewarn has
      been triggered    false   false
      off time          5       5
      blank time        24      24
      hysterisis
      -end              2       2
      -start            3       3
      Stallguard thrs   0       0
      DRVSTATUS X       Y
      stallguard
      sg_result         0       0
      fsactive
      stst
      olb
      ola
      s2gb
      s2ga
      otpw
      ot
      'Driver registers:'
        X = 0x80:0D:00:00
        Y = 0x80:0D:00:00

---

Do a communication check for configured TMC drivers. Trinamic drivers that support this feature are TMC2130, TMC2160, TMC2208, TMC2209, TMC2660, TMC5130, and TMC5160.

- With no parameters, this command returns the current settings for all installed and supported Trinamic stepper drivers.
- Send `M122 I` to re-initialize drivers after a late power-on. Use `S[0|1]` to enable/disable continuous debugging output.