I2SO bug when using as Spindle Enable signal

[robercy]

Hello ! When using I2So outputs to enable Spindles, other I2SO outputs flash randomly, it causes too many undue step pulses, and erratic axes movements. I use TMC2209 as drivers, and UART to control.

To solve this problem I commented the line below (line 70), in the PWMSpindle.cpp file, and I stopped having this problem.

void IRAM_ATTR PWM::setSpeedfromISR(uint32_t dev_speed) {
    // set_enable(gc_state.modal.spindle != SpindleState::Disable);
    set_output(dev_speed);
}

I’m using firmware 3.3.2, and I could repeat the problem changing enable pins from I2SO to gpio pins, on Spindle configuration. Maybe, to solve the problem, calling set_enable just when signal change, could resolve.

It seems that a refresh rate, when used as an output for the Spindle, is too high, not giving the 74HC595 time to operate properly.

This is my configuration:

board: Roby CNC name: Roby CNC Multibot V2

arc_tolerance_mm: 0.002 junction_deviation_mm: 0.010 verbose_errors: false report_inches: false enable_parking_override_control: false use_line_numbers: false

stepping: engine: I2S_STREAM idle_ms: 250 pulse_us: 4 dir_delay_us: 1 disable_delay_us: 0

axes: shared_stepper_disable_pin: NO_PIN

x: steps_per_mm: 400.0 max_rate_mm_per_min: 1200.0 acceleration_mm_per_sec2: 100.0 max_travel_mm: 350.0 soft_limits: true homing: cycle: 2 positive_direction: true mpos_mm: 1 feed_mm_per_min: 100.0 seek_mm_per_min: 200.0 settle_ms: 500 seek_scaler: 1.100 feed_scaler: 1.100

motor0:
  limit_neg_pin: gpio.36
  limit_pos_pin: gpio.39
  hard_limits: true
  pulloff_mm: 1.000
  tmc_2209:
    uart:
      rxd_pin: gpio.18
      txd_pin: gpio.19
      baud: 115200
      mode: 8N1
    addr: 0
    r_sense_ohms: 0.110
    run_amps: 1.200
    hold_amps: 0.100
    microsteps: 16
    stallguard: 30
    stallguard_debug: false
    toff_disable: 0
    toff_stealthchop: 5
    toff_coolstep: 3
    run_mode: StealthChop
    homing_mode: StealthChop
    use_enable: true
    disable_pin: I2SO.0
    direction_pin: I2SO.1
    step_pin: I2SO.2
    

y: steps_per_mm: 400.0 max_rate_mm_per_min: 1200.0 acceleration_mm_per_sec2: 100.0 max_travel_mm: 450.0 soft_limits: true homing: cycle: 2 positive_direction: true mpos_mm: 1 feed_mm_per_min: 100.0 seek_mm_per_min: 200.0 settle_ms: 500 seek_scaler: 1.100 feed_scaler: 1.100

motor0:
  limit_neg_pin: gpio.34
  limit_pos_pin: gpio.35
  hard_limits: true
  pulloff_mm: 1.000
  tmc_2209:
    addr: 1
    r_sense_ohms: 0.110
    run_amps: 1.200
    hold_amps: 0.100
    microsteps: 16
    stallguard: 30
    stallguard_debug: false
    toff_disable: 0
    toff_stealthchop: 5
    toff_coolstep: 3
    run_mode: StealthChop
    homing_mode: StealthChop
    use_enable: true
    disable_pin: I2SO.4
    direction_pin: I2SO.5
    step_pin: I2SO.6
motor1:
  limit_neg_pin: gpio.32
  limit_pos_pin: gpio.33
  hard_limits: true
  pulloff_mm: 1.000
  tmc_2209:
    addr: 2
    r_sense_ohms: 0.110
    run_amps: 1.200
    hold_amps: 0.100
    microsteps: 16
    stallguard: 30
    stallguard_debug: false
    toff_disable: 0
    toff_stealthchop: 5
    toff_coolstep: 3
    run_mode: StealthChop
    homing_mode: StealthChop
    use_enable: true
    disable_pin: I2SO.8
    direction_pin: I2SO.9
    step_pin: I2SO.10

z: steps_per_mm: 400.0 max_rate_mm_per_min: 1000.0 acceleration_mm_per_sec2: 100.0 max_travel_mm: 60.0 soft_limits: true homing: cycle: 1 positive_direction: true mpos_mm: 1 feed_mm_per_min: 100.0 seek_mm_per_min: 200.0 settle_ms: 500 seek_scaler: 1.100 feed_scaler: 1.100

motor0:
  limit_neg_pin: gpio.25
  limit_pos_pin: gpio.26
  hard_limits: true
  pulloff_mm: 1.000
  tmc_2209:
    addr: 3
    r_sense_ohms: 0.110
    run_amps: 1.200
    hold_amps: 0.100
    microsteps: 16
    stallguard: 30
    stallguard_debug: false
    toff_disable: 0
    toff_stealthchop: 5
    toff_coolstep: 3
    run_mode: StealthChop
    homing_mode: StealthChop
    use_enable: true
    disable_pin: I2SO.12
    direction_pin: I2SO.13
    step_pin: I2SO.14

PWM: pwm_hz: 5000 output_pin: gpio.23 enable_pin: I2SO.16 direction_pin: I2SO.17 disable_with_s0: false s0_with_disable: true spinup_ms: 0 spindown_ms: 0 tool_num: 0 speed_map: 0=0% 9000=100%

Laser: pwm_hz: 5000 output_pin: gpio.15 enable_pin: I2SO.18 disable_with_s0: false s0_with_disable: true tool_num: 10 speed_map: 0=0.000% 255=100.000%

Relay: output_pin: I2SO.19

coolant: flood_pin: I2SO.20 mist_pin: I2SO.21 delay_ms: 0

i2so: bck_pin: gpio.22 data_pin: gpio.21 ws_pin: gpio.17

probe: pin: gpio.27:low:pu check_mode_start: true

Regards, Robercy