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 - "reset" : The UG bit from the TIMx_EGR register is
7 <<
8 - "reset" <<
9 The UG bit fro <<
10 used as trigge 7 used as trigger output (TRGO).
11 - "enable" !! 8 - "enable" : The Counter Enable signal CNT_EN is used
12 The Counter En <<
13 as trigger out 9 as trigger output.
14 - "update" !! 10 - "update" : The update event is selected as trigger output.
15 The update eve <<
16 For instance a 11 For instance a master timer can then be used
17 as a prescaler 12 as a prescaler for a slave timer.
18 - "compare_pulse" !! 13 - "compare_pulse" : The trigger output send a positive pulse
19 The trigger ou !! 14 when the CC1IF flag is to be set.
20 when the CC1IF !! 15 - "OC1REF" : OC1REF signal is used as trigger output.
21 - "OC1REF" !! 16 - "OC2REF" : OC2REF signal is used as trigger output.
22 OC1REF signal !! 17 - "OC3REF" : OC3REF signal is used as trigger output.
23 - "OC2REF" !! 18 - "OC4REF" : OC4REF signal is used as trigger output.
24 OC2REF signal <<
25 - "OC3REF" <<
26 OC3REF signal <<
27 - "OC4REF" <<
28 OC4REF signal <<
29 <<
30 Additional modes (on TRGO2 onl 19 Additional modes (on TRGO2 only):
31 !! 20 - "OC5REF" : OC5REF signal is used as trigger output.
32 - "OC5REF" !! 21 - "OC6REF" : OC6REF signal is used as trigger output.
33 OC5REF signal <<
34 - "OC6REF" <<
35 OC6REF signal <<
36 - "compare_pulse_OC4REF": 22 - "compare_pulse_OC4REF":
37 OC4REF rising !! 23 OC4REF rising or falling edges generate pulses.
38 - "compare_pulse_OC6REF": 24 - "compare_pulse_OC6REF":
39 OC6REF rising !! 25 OC6REF rising or falling edges generate pulses.
40 - "compare_pulse_OC4REF_r_or_O 26 - "compare_pulse_OC4REF_r_or_OC6REF_r":
41 OC4REF or OC6R !! 27 OC4REF or OC6REF rising edges generate pulses.
42 - "compare_pulse_OC4REF_r_or_O 28 - "compare_pulse_OC4REF_r_or_OC6REF_f":
43 OC4REF rising !! 29 OC4REF rising or OC6REF falling edges generate pulses.
44 pulses. <<
45 - "compare_pulse_OC5REF_r_or_O 30 - "compare_pulse_OC5REF_r_or_OC6REF_r":
46 OC5REF or OC6R !! 31 OC5REF or OC6REF rising edges generate pulses.
47 - "compare_pulse_OC5REF_r_or_O 32 - "compare_pulse_OC5REF_r_or_OC6REF_f":
48 OC5REF rising !! 33 OC5REF rising or OC6REF falling edges generate pulses.
49 pulses. <<
50 <<
51 :: <<
52 34
53 +-----------+ +----------- !! 35 +-----------+ +-------------+ +---------+
54 | Prescaler +-> | Counter !! 36 | Prescaler +-> | Counter | +-> | Master | TRGO(2)
55 +-----------+ +--+-------- !! 37 +-----------+ +--+--------+-+ |-> | Control +-->
56 | !! 38 | | || +---------+
57 +--v-------- !! 39 +--v--------+-+ OCxREF || +---------+
58 | Chx compar !! 40 | Chx compare +----------> | Output | ChX
59 +----------- !! 41 +-----------+-+ | | Control +-->
60 . !! 42 . | | +---------+
61 . !! 43 . | | .
62 +----------- !! 44 +-----------v-+ OC6REF | .
63 | Ch6 compar !! 45 | Ch6 compare +---------+>
64 +----------- !! 46 +-------------+
65 !! 47
66 Example with: "compare_pulse_O !! 48 Example with: "compare_pulse_OC4REF_r_or_OC6REF_r":
67 !! 49
68 X !! 50 X
69 X X !! 51 X X
70 X . . X !! 52 X . . X
71 X . . X !! 53 X . . X
72 X . . X !! 54 X . . X
73 count X . . . . X !! 55 count X . . . . X
74 . . . . !! 56 . . . .
75 . . . . !! 57 . . . .
76 +---------------+ !! 58 +---------------+
77 OC4REF | . . | !! 59 OC4REF | . . |
78 +-+ . . +-+ !! 60 +-+ . . +-+
79 . +---+ . !! 61 . +---+ .
80 OC6REF . | | . !! 62 OC6REF . | | .
81 +-------+ +-------+ !! 63 +-------+ +-------+
82 +-+ +-+ !! 64 +-+ +-+
83 TRGO2 | | | | !! 65 TRGO2 | | | |
84 +-+ +---+ +---------+ !! 66 +-+ +---+ +---------+
85 67
86 What: /sys/bus/iio/devices/triggerX/ 68 What: /sys/bus/iio/devices/triggerX/master_mode
87 KernelVersion: 4.11 69 KernelVersion: 4.11
88 Contact: benjamin.gaignard@st.com 70 Contact: benjamin.gaignard@st.com
89 Description: 71 Description:
90 Reading returns the current ma 72 Reading returns the current master modes.
91 Writing set the master mode 73 Writing set the master mode
92 74
>> 75 What: /sys/bus/iio/devices/triggerX/sampling_frequency
>> 76 KernelVersion: 4.11
>> 77 Contact: benjamin.gaignard@st.com
>> 78 Description:
>> 79 Reading returns the current sampling frequency.
>> 80 Writing an value different of 0 set and start sampling.
>> 81 Writing 0 stop sampling.
>> 82
93 What: /sys/bus/iio/devices/iio:devic 83 What: /sys/bus/iio/devices/iio:deviceX/in_count0_preset
94 KernelVersion: 4.12 84 KernelVersion: 4.12
95 Contact: benjamin.gaignard@st.com 85 Contact: benjamin.gaignard@st.com
96 Description: 86 Description:
97 Reading returns the current pr 87 Reading returns the current preset value.
98 Writing sets the preset value. 88 Writing sets the preset value.
99 When counting up the counter s 89 When counting up the counter starts from 0 and fires an
100 event when reach preset value. 90 event when reach preset value.
101 When counting down the counter 91 When counting down the counter start from preset value
102 and fire event when reach 0. 92 and fire event when reach 0.
103 93
>> 94 What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
>> 95 KernelVersion: 4.12
>> 96 Contact: benjamin.gaignard@st.com
>> 97 Description:
>> 98 Reading returns the list possible quadrature modes.
>> 99
>> 100 What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
>> 101 KernelVersion: 4.12
>> 102 Contact: benjamin.gaignard@st.com
>> 103 Description:
>> 104 Configure the device counter quadrature modes:
>> 105 channel_A:
>> 106 Encoder A input servers as the count input and B as
>> 107 the UP/DOWN direction control input.
>> 108
>> 109 channel_B:
>> 110 Encoder B input serves as the count input and A as
>> 111 the UP/DOWN direction control input.
>> 112
>> 113 quadrature:
>> 114 Encoder A and B inputs are mixed to get direction
>> 115 and count with a scale of 0.25.
>> 116
104 What: /sys/bus/iio/devices/iio:devic 117 What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
105 KernelVersion: 4.12 118 KernelVersion: 4.12
106 Contact: benjamin.gaignard@st.com 119 Contact: benjamin.gaignard@st.com
107 Description: 120 Description:
108 Reading returns the list possi 121 Reading returns the list possible enable modes.
109 122
110 What: /sys/bus/iio/devices/iio:devic 123 What: /sys/bus/iio/devices/iio:deviceX/in_count0_enable_mode
111 KernelVersion: 4.12 124 KernelVersion: 4.12
112 Contact: benjamin.gaignard@st.com 125 Contact: benjamin.gaignard@st.com
113 Description: 126 Description:
114 Configure the device counter e 127 Configure the device counter enable modes, in all case
115 counting direction is set by i 128 counting direction is set by in_count0_count_direction
116 attribute and the counter is c 129 attribute and the counter is clocked by the internal clock.
117 <<
118 always: 130 always:
119 Counter is always ON. 131 Counter is always ON.
120 132
121 gated: 133 gated:
122 Counting is enabled wh 134 Counting is enabled when connected trigger signal
123 level is high else cou 135 level is high else counting is disabled.
124 136
125 triggered: 137 triggered:
126 Counting is enabled on 138 Counting is enabled on rising edge of the connected
127 trigger, and remains e 139 trigger, and remains enabled for the duration of this
128 selected mode. 140 selected mode.
129 141
130 What: /sys/bus/iio/devices/iio:devic 142 What: /sys/bus/iio/devices/iio:deviceX/in_count_trigger_mode_available
131 KernelVersion: 4.13 143 KernelVersion: 4.13
132 Contact: benjamin.gaignard@st.com 144 Contact: benjamin.gaignard@st.com
133 Description: 145 Description:
134 Reading returns the list possi 146 Reading returns the list possible trigger modes.
135 147
136 What: /sys/bus/iio/devices/iio:devic 148 What: /sys/bus/iio/devices/iio:deviceX/in_count0_trigger_mode
137 KernelVersion: 4.13 149 KernelVersion: 4.13
138 Contact: benjamin.gaignard@st.com 150 Contact: benjamin.gaignard@st.com
139 Description: 151 Description:
140 Configure the device counter t 152 Configure the device counter trigger mode
141 counting direction is set by i 153 counting direction is set by in_count0_count_direction
142 attribute and the counter is c 154 attribute and the counter is clocked by the connected trigger
143 rising edges. 155 rising edges.
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