1 What: /sys/bus/iio/devices/triggerX/ 1 What: /sys/bus/iio/devices/triggerX/master_mode_available
2 KernelVersion: 4.11 2 KernelVersion: 4.11
3 Contact: benjamin.gaignard@st.com 3 Contact: benjamin.gaignard@st.com
4 Description: 4 Description:
5 Reading returns the list possi 5 Reading returns the list possible master modes which are:
6 6
7 7
8 - "reset" 8 - "reset"
9 The UG bit fro 9 The UG bit from the TIMx_EGR register is
10 used as trigge 10 used as trigger output (TRGO).
11 - "enable" 11 - "enable"
12 The Counter En 12 The Counter Enable signal CNT_EN is used
13 as trigger out 13 as trigger output.
14 - "update" 14 - "update"
15 The update eve 15 The update event is selected as trigger output.
16 For instance a 16 For instance a master timer can then be used
17 as a prescaler 17 as a prescaler for a slave timer.
18 - "compare_pulse" 18 - "compare_pulse"
19 The trigger ou 19 The trigger output send a positive pulse
20 when the CC1IF 20 when the CC1IF flag is to be set.
21 - "OC1REF" 21 - "OC1REF"
22 OC1REF signal 22 OC1REF signal is used as trigger output.
23 - "OC2REF" 23 - "OC2REF"
24 OC2REF signal 24 OC2REF signal is used as trigger output.
25 - "OC3REF" 25 - "OC3REF"
26 OC3REF signal 26 OC3REF signal is used as trigger output.
27 - "OC4REF" 27 - "OC4REF"
28 OC4REF signal 28 OC4REF signal is used as trigger output.
29 29
30 Additional modes (on TRGO2 onl 30 Additional modes (on TRGO2 only):
31 31
32 - "OC5REF" 32 - "OC5REF"
33 OC5REF signal 33 OC5REF signal is used as trigger output.
34 - "OC6REF" 34 - "OC6REF"
35 OC6REF signal 35 OC6REF signal is used as trigger output.
36 - "compare_pulse_OC4REF": 36 - "compare_pulse_OC4REF":
37 OC4REF rising 37 OC4REF rising or falling edges generate pulses.
38 - "compare_pulse_OC6REF": 38 - "compare_pulse_OC6REF":
39 OC6REF rising 39 OC6REF rising or falling edges generate pulses.
40 - "compare_pulse_OC4REF_r_or_O 40 - "compare_pulse_OC4REF_r_or_OC6REF_r":
41 OC4REF or OC6R 41 OC4REF or OC6REF rising edges generate pulses.
42 - "compare_pulse_OC4REF_r_or_O 42 - "compare_pulse_OC4REF_r_or_OC6REF_f":
43 OC4REF rising 43 OC4REF rising or OC6REF falling edges generate
44 pulses. 44 pulses.
45 - "compare_pulse_OC5REF_r_or_O 45 - "compare_pulse_OC5REF_r_or_OC6REF_r":
46 OC5REF or OC6R 46 OC5REF or OC6REF rising edges generate pulses.
47 - "compare_pulse_OC5REF_r_or_O 47 - "compare_pulse_OC5REF_r_or_OC6REF_f":
48 OC5REF rising 48 OC5REF rising or OC6REF falling edges generate
49 pulses. 49 pulses.
50 50
51 :: 51 ::
52 52
53 +-----------+ +----------- 53 +-----------+ +-------------+ +---------+
54 | Prescaler +-> | Counter 54 | Prescaler +-> | Counter | +-> | Master | TRGO(2)
55 +-----------+ +--+-------- 55 +-----------+ +--+--------+-+ |-> | Control +-->
56 | 56 | | || +---------+
57 +--v-------- 57 +--v--------+-+ OCxREF || +---------+
58 | Chx compar 58 | Chx compare +----------> | Output | ChX
59 +----------- 59 +-----------+-+ | | Control +-->
60 . 60 . | | +---------+
61 . 61 . | | .
62 +----------- 62 +-----------v-+ OC6REF | .
63 | Ch6 compar 63 | Ch6 compare +---------+>
64 +----------- 64 +-------------+
65 65
66 Example with: "compare_pulse_O 66 Example with: "compare_pulse_OC4REF_r_or_OC6REF_r"::
67 67
68 X 68 X
69 X X 69 X X
70 X . . X 70 X . . X
71 X . . X 71 X . . X
72 X . . X 72 X . . X
73 count X . . . . X 73 count X . . . . X
74 . . . . 74 . . . .
75 . . . . 75 . . . .
76 +---------------+ 76 +---------------+
77 OC4REF | . . | 77 OC4REF | . . |
78 +-+ . . +-+ 78 +-+ . . +-+
79 . +---+ . 79 . +---+ .
80 OC6REF . | | . 80 OC6REF . | | .
81 +-------+ +-------+ 81 +-------+ +-------+
82 +-+ +-+ 82 +-+ +-+
83 TRGO2 | | | | 83 TRGO2 | | | |
84 +-+ +---+ +---------+ 84 +-+ +---+ +---------+
85 85
86 What: /sys/bus/iio/devices/triggerX/ 86 What: /sys/bus/iio/devices/triggerX/master_mode
87 KernelVersion: 4.11 87 KernelVersion: 4.11
88 Contact: benjamin.gaignard@st.com 88 Contact: benjamin.gaignard@st.com
89 Description: 89 Description:
90 Reading returns the current ma 90 Reading returns the current master modes.
91 Writing set the master mode 91 Writing set the master mode
92 92
>> 93 What: /sys/bus/iio/devices/triggerX/sampling_frequency
>> 94 KernelVersion: 4.11
>> 95 Contact: benjamin.gaignard@st.com
>> 96 Description:
>> 97 Reading returns the current sampling frequency.
>> 98 Writing an value different of 0 set and start sampling.
>> 99 Writing 0 stop sampling.
>> 100
93 What: /sys/bus/iio/devices/iio:devic 101 What: /sys/bus/iio/devices/iio:deviceX/in_count0_preset
94 KernelVersion: 4.12 102 KernelVersion: 4.12
95 Contact: benjamin.gaignard@st.com 103 Contact: benjamin.gaignard@st.com
96 Description: 104 Description:
97 Reading returns the current pr 105 Reading returns the current preset value.
98 Writing sets the preset value. 106 Writing sets the preset value.
99 When counting up the counter s 107 When counting up the counter starts from 0 and fires an
100 event when reach preset value. 108 event when reach preset value.
101 When counting down the counter 109 When counting down the counter start from preset value
102 and fire event when reach 0. 110 and fire event when reach 0.
103 111
104 What: /sys/bus/iio/devices/iio:devic 112 What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
105 KernelVersion: 4.12 113 KernelVersion: 4.12
106 Contact: benjamin.gaignard@st.com 114 Contact: benjamin.gaignard@st.com
107 Description: 115 Description:
108 Reading returns the list possi 116 Reading returns the list possible enable modes.
109 117
110 What: /sys/bus/iio/devices/iio:devic 118 What: /sys/bus/iio/devices/iio:deviceX/in_count0_enable_mode
111 KernelVersion: 4.12 119 KernelVersion: 4.12
112 Contact: benjamin.gaignard@st.com 120 Contact: benjamin.gaignard@st.com
113 Description: 121 Description:
114 Configure the device counter e 122 Configure the device counter enable modes, in all case
115 counting direction is set by i 123 counting direction is set by in_count0_count_direction
116 attribute and the counter is c 124 attribute and the counter is clocked by the internal clock.
117 125
118 always: 126 always:
119 Counter is always ON. 127 Counter is always ON.
120 128
121 gated: 129 gated:
122 Counting is enabled wh 130 Counting is enabled when connected trigger signal
123 level is high else cou 131 level is high else counting is disabled.
124 132
125 triggered: 133 triggered:
126 Counting is enabled on 134 Counting is enabled on rising edge of the connected
127 trigger, and remains e 135 trigger, and remains enabled for the duration of this
128 selected mode. 136 selected mode.
129 137
130 What: /sys/bus/iio/devices/iio:devic 138 What: /sys/bus/iio/devices/iio:deviceX/in_count_trigger_mode_available
131 KernelVersion: 4.13 139 KernelVersion: 4.13
132 Contact: benjamin.gaignard@st.com 140 Contact: benjamin.gaignard@st.com
133 Description: 141 Description:
134 Reading returns the list possi 142 Reading returns the list possible trigger modes.
135 143
136 What: /sys/bus/iio/devices/iio:devic 144 What: /sys/bus/iio/devices/iio:deviceX/in_count0_trigger_mode
137 KernelVersion: 4.13 145 KernelVersion: 4.13
138 Contact: benjamin.gaignard@st.com 146 Contact: benjamin.gaignard@st.com
139 Description: 147 Description:
140 Configure the device counter t 148 Configure the device counter trigger mode
141 counting direction is set by i 149 counting direction is set by in_count0_count_direction
142 attribute and the counter is c 150 attribute and the counter is clocked by the connected trigger
143 rising edges. 151 rising edges.
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