How to use PPM to control two BLDC motors simultaneously

I am a new member. Recently, I was studying how to make ODrives control two motors with Hall at the same time. But it doesn’t seem to go well. I did it directly according to the order. Reference link
I use GPIO 3 and GPIO4 as PPM input port, 3 controls M0, 4 controls M1.
Only one can be controlled, and the other is not moving, but you can see the “setpoint” throttle value. The “setpoint” of a non-rotating motor can always change with the change of PPM. Can you give me some hints?
This is the order I wrote.

    Configuration motor 1:
    odrv0.axis1.motor.config.pole_pairs = 7
    odrv0.axis1.motor.config.resistance_calib_max_voltage = 4
    odrv0.axis1.motor.config.requested_current_range = 25 
    odrv0.axis1.motor.config.current_control_bandwidth = 100
    odrv0.axis1.encoder.config.mode = ENCODER_MODE_HALL
    odrv0.axis1.encoder.config.cpr = 42
    odrv0.axis1.encoder.config.bandwidth = 100
    odrv0.axis1.controller.config.pos_gain = 1
    odrv0.axis1.controller.config.vel_gain = 0.02
    odrv0.axis1.controller.config.vel_integrator_gain = 0.1
    odrv0.axis1.controller.config.vel_limit = 1000
    odrv0.axis1.controller.config.control_mode = CTRL_MODE_VELOCITY_CONTROL
    odrv0.axis1.requested_state = AXIS_STATE_MOTOR_CALIBRATION
    odrv0.axis1.motor.config.pre_calibrated = True
    odrv0.axis1.requested_state = AXIS_STATE_ENCODER_OFFSET_CALIBRATION
    odrv0.axis1.encoder.config.pre_calibrated = True
    odrv0.axis1.requested_state = AXIS_STATE_CLOSED_LOOP_CONTROL
    odrv0.axis1.controller.vel_setpoint = 120
    odrv0.axis1.controller.vel_setpoint = 0
    odrv0.axis1.requested_state = AXIS_STATE_IDLE

The command of motor 0 is the same as that of motor 1.
Setting PPM input:

    odrv0.config.gpio3_pwm_mapping.min = -200
    odrv0.config.gpio3_pwm_mapping.max = 200
    odrv0.config.gpio3_pwm_mapping.endpoint = odrv0.axis0.controller._remote_attributes['vel_setpoint']
    odrv0.config.gpio4_pwm_mapping.min = -200
    odrv0.config.gpio4_pwm_mapping.max = 200
    odrv0.config.gpio4_pwm_mapping.endpoint = odrv0.axis1.controller._remote_attributes['vel_setpoint']
    odrv0.axis0.requested_state = AXIS_STATE_CLOSED_LOOP_CONTROL
    odrv0.axis1.requested_state = AXIS_STATE_CLOSED_LOOP_CONTROL
    odrv0.axis0.config.startup_closed_loop_control = True
    odrv0.axis1.config.startup_closed_loop_control = True

Have you configured axis0 as well as axis1?

Of course, I tried it several times.

You are saying that you are able to see vel_setpoint change on both motors, but only one is running? Which one runs, M0 or M1? Does the one that doesn’t run have an error? hex(odrv0.axis0.error)

Thank you for your reply. I have now solved this problem by adding 22nF capacitance to three coder lines.