Hi
Technically this is a Zephyr question, but googling the issue gave no success. Also, reading the Zephyr docs gavve me no clue.
I have a custom nrf9160 board with an accelerometer (ADXL343). I have two scheduled tasks (starting and stopping GPS, starting and stopping accelerometer) that both are submitted to a work queue.
First I tried to submit both tasks (as delayed work items) to the system work queue, with different delays. This did not work, only the last item pushed to the queue was started, and it was started at the time I expected the first to start, even though the delay was much higher.
Then I tried to define a work queue to solely for my gsensor task, and keeping the system work queue for my GPS task. The new work queue is specified and initialized according to Zephyr docs, see developer.nordicsemi.com/.../workqueue.html Now both tasks were started on the same millisec, according to the logs. This is happening every time I restart the device.
[3.16 14.05.06.762]i2c gsensor init complete! [3.16 14.05.06.762]Starting gsensor process in 4 minutes [3.16 14.05.16.533]Send triggered! [3.16 14.05.16.533]Gsensor work started with thread id 0x20023434 [3.16 14.05.16.533]Locking VDD_SENSOR high [3.16 14.05.16.533]Turning gsensor ON [3.16 14.05.16.775]Turning LNA ON [3.16 14.05.16.775]Turned LNA ON [3.16 14.05.17.778]GPS thread_id: 0x20028ce0 [3.16 14.05.17.778]GPS started successfully. [3.16 14.05.17.808]Searching for satellites to get position fix. This may take several minutes. [3.16 14.05.17.808]The device will attempt to get a fix for 150 seconds, before the GPS is stopped. [3.16 14.05.17.808]GPS operation started
GSensor code looks like this
void nRFGSensorInit(void) {
printk("Starting GSensor init\n");
gpio_vdd_sensor(true);
i2c_gpio_init();
nRFGSensorInitWorkQueue();
printk("Gsensor work queue init complete\n");
//set Shock Level for the accelerometer
adxl343_init(GSENSOR_STARTUP_SHOCKLEVEL);
gpio_vdd_sensor(false);
//Turn on all axes
//setActivityXYZ(true, true, true);
gpio_adxl343_interrupt_configure(gpio_adxl_interrupt_handler);
k_delayed_work_init(&gsensor_work.work, gsensor_handler);
printk("i2c gsensor init complete!\n");
k_delayed_work_submit_to_queue(&gsensor_work_q, &gsensor_work.work, K_SECONDS(240));
printk("Starting gsensor process in 4 minutes\n");
}
void nRFGSensorInitWorkQueue(void){
k_work_q_start(&gsensor_work_q, gsensor_stack_area,
K_THREAD_STACK_SIZEOF(gsensor_stack_area), GSENSOR_THREAD_PRIORITY);
}
