On 09/20/2012 02:44 PM, Denis Ciocca wrote: >> Yes, you need a buffer. The trigger won't be activated until the buffer is >> active. To activate the buffer you need to select at least one scan element >> in the scan_elements subfolder of you IIO device, then set the buffer size >> by writing to buffer/length and finally write a 1 to buffer/enable. Now you >> should see your acc_trigger_handler being called. > > I don't understand what you mean with: > "select at least one scan element in the scan_elements subfolder" > I have seen the adis16240 accelerometer driver for example but I don't saw > anything about scan element. Can you be more specific? So each channel has a scan index. And for each channel you can enable whether the channel should be sampled in buffered mode or not. There is a sysfs file for each channel which allows you to do this in the scan_elements subfolder. In order to start sampling you have to enable at least one scan_element by writing a 1 to its enable attribute. - Lars -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
