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    Kerry Snyder

    @Kerry Snyder

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    Latest posts made by Kerry Snyder

    • RE: VOXL2 Mini / AR0144 J7 Group 1 / voxl-fsync-mod

      I can confirm that multi-camera triggering works with a very minor patch:

      diff --git a/recipes-kernel/voxl-fysnc-mod/files/voxl-fsync-mod.c b/recipes-kernel/voxl-fysnc-mod/files/voxl-fsync-mod.c
      index 837dd21..730e374 100644
      --- a/recipes-kernel/voxl-fysnc-mod/files/voxl-fsync-mod.c
      +++ b/recipes-kernel/voxl-fysnc-mod/files/voxl-fsync-mod.c
      @@ -24,7 +24,10 @@
        * /sys/module/voxl_fsync_mod/parameters/pulse_width_us
        *  - uint - the length of pulse to use in microseconds, default 10, 10us
        * 
      - * /sys/module/voxl_fsync_mod/parameters/gpio_num
      + * /sys/module/voxl_fsync_mod/parameters/gpio1_num
      + *  - uint - the GPIO number to use
      + * 
      + * /sys/module/voxl_fsync_mod/parameters/gpio2_num
        *  - uint - the GPIO number to use
        */
       #define GPIO_OFFSET 1100
      @@ -38,8 +41,10 @@ static uint pulse_width_us = 10; //
       module_param(pulse_width_us, uint, 0644);
       
       /* GPIO number */
      -static uint gpio_num = 109;
      -module_param(gpio_num, uint, 0644);
      +static uint gpio1_num = 41;
      +module_param(gpio1_num, uint, 0644);
      +static uint gpio2_num = 114;
      +module_param(gpio2_num, uint, 0644);
       
       /* enable/disable the GPIO output and timestamps */
       static int enabled = 0;
      @@ -143,8 +148,10 @@ static enum hrtimer_restart fsync_hrtimer_tick_cb(struct hrtimer *timer)
       {
       	/* initialize on being enabled */
       	if (!initialized && enabled) {
      -		gpio_direction_output((gpio_num + GPIO_OFFSET), 0);
      -		gpio_export((gpio_num + GPIO_OFFSET), true);
      +		gpio_direction_output((gpio1_num + GPIO_OFFSET), 0);
      +		gpio_export((gpio1_num + GPIO_OFFSET), true);
      +		gpio_direction_output((gpio2_num + GPIO_OFFSET), 0);
      +		gpio_export((gpio2_num + GPIO_OFFSET), true);
       		initialized = true;
       		pr_info("voxl-fsync: initialized\n");
       	}
      @@ -153,7 +160,8 @@ static enum hrtimer_restart fsync_hrtimer_tick_cb(struct hrtimer *timer)
       	hrtimer_forward_now(&fsync_hrtimer, ns_to_ktime(sampling_period_ns));
       	
       	if (enabled) {
      -		gpio_set_value((gpio_num + GPIO_OFFSET), 1);
      +		gpio_set_value((gpio1_num + GPIO_OFFSET), 1);
      +		gpio_set_value((gpio2_num + GPIO_OFFSET), 1);
       
       		/* TIMESTAMP TIMESTAMP TIMESTAMP*/
       		mutex_lock(&fysnc_mutex);
      @@ -163,7 +171,8 @@ static enum hrtimer_restart fsync_hrtimer_tick_cb(struct hrtimer *timer)
       		if(pulse_width_us > 0)
       			udelay(pulse_width_us);
       
      -		gpio_set_value((gpio_num + GPIO_OFFSET), 0);
      +		gpio_set_value((gpio1_num + GPIO_OFFSET), 0);
      +		gpio_set_value((gpio2_num + GPIO_OFFSET), 0);
       
       		/* signal clients */
       		fsync_update_pending = 1;
      
      
      posted in VOXL 2 Mini
      Kerry SnyderK
      Kerry Snyder
    • RE: VOXL2 Mini / AR0144 J7 Group 1 / voxl-fsync-mod

      Thanks! I was able to grab and flash SDK 1.3.0 yesterday and it's been working well.

      com.qti.sensormodule.ar0144_fsin_2.bin does seem to work - I'm able to configure gpio_num to 114 and control the ar0144 rate with voxl_fsync_mod.

      The max frame rate I saw indoors was 43.5hz with sampling_period_ns set to 23000000, and outdoors was 52.6hz with sampling_period_ns set to 19000000. I suspect this is somehow related to exposure time (or an exposure cap) although I see a solid 60hz indoors and outdoors when I manually configure the frame rate. For reference, this is all measured with gstreamer qtiqmmfsrc into OpenCV and then ROS2, which could definitely impact performance and exposure control.

      I'll try out a multi-gpio kernel module modification! Thanks again!

      posted in VOXL 2 Mini
      Kerry SnyderK
      Kerry Snyder
    • VOXL2 Mini / AR0144 J7 Group 1 / voxl-fsync-mod

      I have been able to successfully compile and run voxl-fsync-mod on the VOXL2 Mini to generate trigger pulses on GPO 41 (on connector J10) for an external USB camera. Next, I would like to trigger our AR0144 (MSU-M0149-1) module, which is connected to J7 Group 1 (sensor3) through MDK-M0076-1-00. If I'm parsing this page correctly, I will want to trigger on pin 114. I think I will also need 'com.qti.sensormodule.ar0144_fsin_3.bin' from Modal to enable sync input for the image sensor.

      Is this understanding correct? And would I be able to get that 'bin' file to support this configuration?

      Other minor related questions:

      1. Is VOXL2 Mini 1.7.X still due to be released soon (so that we can have voxl-fsync-mod built in)?
      2. If we want to trigger multiple cameras on different GPIO, is our best bet to modify voxl-fsync-mod to toggle multiple pins within fsync_hrtimer_tick_cb?
      posted in VOXL 2 Mini
      Kerry SnyderK
      Kerry Snyder