152 строки
4.8 KiB
Plaintext
152 строки
4.8 KiB
Plaintext
What: /sys/bus/iio/devices/triggerX/master_mode_available
|
|
KernelVersion: 4.11
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the list possible master modes which are:
|
|
|
|
|
|
- "reset"
|
|
The UG bit from the TIMx_EGR register is
|
|
used as trigger output (TRGO).
|
|
- "enable"
|
|
The Counter Enable signal CNT_EN is used
|
|
as trigger output.
|
|
- "update"
|
|
The update event is selected as trigger output.
|
|
For instance a master timer can then be used
|
|
as a prescaler for a slave timer.
|
|
- "compare_pulse"
|
|
The trigger output send a positive pulse
|
|
when the CC1IF flag is to be set.
|
|
- "OC1REF"
|
|
OC1REF signal is used as trigger output.
|
|
- "OC2REF"
|
|
OC2REF signal is used as trigger output.
|
|
- "OC3REF"
|
|
OC3REF signal is used as trigger output.
|
|
- "OC4REF"
|
|
OC4REF signal is used as trigger output.
|
|
|
|
Additional modes (on TRGO2 only):
|
|
|
|
- "OC5REF"
|
|
OC5REF signal is used as trigger output.
|
|
- "OC6REF"
|
|
OC6REF signal is used as trigger output.
|
|
- "compare_pulse_OC4REF":
|
|
OC4REF rising or falling edges generate pulses.
|
|
- "compare_pulse_OC6REF":
|
|
OC6REF rising or falling edges generate pulses.
|
|
- "compare_pulse_OC4REF_r_or_OC6REF_r":
|
|
OC4REF or OC6REF rising edges generate pulses.
|
|
- "compare_pulse_OC4REF_r_or_OC6REF_f":
|
|
OC4REF rising or OC6REF falling edges generate
|
|
pulses.
|
|
- "compare_pulse_OC5REF_r_or_OC6REF_r":
|
|
OC5REF or OC6REF rising edges generate pulses.
|
|
- "compare_pulse_OC5REF_r_or_OC6REF_f":
|
|
OC5REF rising or OC6REF falling edges generate
|
|
pulses.
|
|
|
|
::
|
|
|
|
+-----------+ +-------------+ +---------+
|
|
| Prescaler +-> | Counter | +-> | Master | TRGO(2)
|
|
+-----------+ +--+--------+-+ |-> | Control +-->
|
|
| | || +---------+
|
|
+--v--------+-+ OCxREF || +---------+
|
|
| Chx compare +----------> | Output | ChX
|
|
+-----------+-+ | | Control +-->
|
|
. | | +---------+
|
|
. | | .
|
|
+-----------v-+ OC6REF | .
|
|
| Ch6 compare +---------+>
|
|
+-------------+
|
|
|
|
Example with: "compare_pulse_OC4REF_r_or_OC6REF_r"::
|
|
|
|
X
|
|
X X
|
|
X . . X
|
|
X . . X
|
|
X . . X
|
|
count X . . . . X
|
|
. . . .
|
|
. . . .
|
|
+---------------+
|
|
OC4REF | . . |
|
|
+-+ . . +-+
|
|
. +---+ .
|
|
OC6REF . | | .
|
|
+-------+ +-------+
|
|
+-+ +-+
|
|
TRGO2 | | | |
|
|
+-+ +---+ +---------+
|
|
|
|
What: /sys/bus/iio/devices/triggerX/master_mode
|
|
KernelVersion: 4.11
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the current master modes.
|
|
Writing set the master mode
|
|
|
|
What: /sys/bus/iio/devices/triggerX/sampling_frequency
|
|
KernelVersion: 4.11
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the current sampling frequency.
|
|
Writing an value different of 0 set and start sampling.
|
|
Writing 0 stop sampling.
|
|
|
|
What: /sys/bus/iio/devices/iio:deviceX/in_count0_preset
|
|
KernelVersion: 4.12
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the current preset value.
|
|
Writing sets the preset value.
|
|
When counting up the counter starts from 0 and fires an
|
|
event when reach preset value.
|
|
When counting down the counter start from preset value
|
|
and fire event when reach 0.
|
|
|
|
What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
|
|
KernelVersion: 4.12
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the list possible enable modes.
|
|
|
|
What: /sys/bus/iio/devices/iio:deviceX/in_count0_enable_mode
|
|
KernelVersion: 4.12
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Configure the device counter enable modes, in all case
|
|
counting direction is set by in_count0_count_direction
|
|
attribute and the counter is clocked by the internal clock.
|
|
|
|
always:
|
|
Counter is always ON.
|
|
|
|
gated:
|
|
Counting is enabled when connected trigger signal
|
|
level is high else counting is disabled.
|
|
|
|
triggered:
|
|
Counting is enabled on rising edge of the connected
|
|
trigger, and remains enabled for the duration of this
|
|
selected mode.
|
|
|
|
What: /sys/bus/iio/devices/iio:deviceX/in_count_trigger_mode_available
|
|
KernelVersion: 4.13
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Reading returns the list possible trigger modes.
|
|
|
|
What: /sys/bus/iio/devices/iio:deviceX/in_count0_trigger_mode
|
|
KernelVersion: 4.13
|
|
Contact: benjamin.gaignard@st.com
|
|
Description:
|
|
Configure the device counter trigger mode
|
|
counting direction is set by in_count0_count_direction
|
|
attribute and the counter is clocked by the connected trigger
|
|
rising edges.
|