| .. | .. |
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| 3 | 3 | Contact: benjamin.gaignard@st.com |
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| 4 | 4 | Description: |
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| 5 | 5 | Reading returns the list possible master modes which are: |
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| 6 | | - - "reset" : The UG bit from the TIMx_EGR register is |
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| 6 | + |
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| 7 | + |
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| 8 | + - "reset" |
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| 9 | + The UG bit from the TIMx_EGR register is |
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| 7 | 10 | used as trigger output (TRGO). |
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| 8 | | - - "enable" : The Counter Enable signal CNT_EN is used |
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| 11 | + - "enable" |
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| 12 | + The Counter Enable signal CNT_EN is used |
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| 9 | 13 | as trigger output. |
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| 10 | | - - "update" : The update event is selected as trigger output. |
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| 14 | + - "update" |
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| 15 | + The update event is selected as trigger output. |
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| 11 | 16 | For instance a master timer can then be used |
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| 12 | 17 | as a prescaler for a slave timer. |
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| 13 | | - - "compare_pulse" : The trigger output send a positive pulse |
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| 14 | | - when the CC1IF flag is to be set. |
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| 15 | | - - "OC1REF" : OC1REF signal is used as trigger output. |
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| 16 | | - - "OC2REF" : OC2REF signal is used as trigger output. |
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| 17 | | - - "OC3REF" : OC3REF signal is used as trigger output. |
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| 18 | | - - "OC4REF" : OC4REF signal is used as trigger output. |
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| 18 | + - "compare_pulse" |
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| 19 | + The trigger output send a positive pulse |
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| 20 | + when the CC1IF flag is to be set. |
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| 21 | + - "OC1REF" |
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| 22 | + OC1REF signal is used as trigger output. |
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| 23 | + - "OC2REF" |
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| 24 | + OC2REF signal is used as trigger output. |
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| 25 | + - "OC3REF" |
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| 26 | + OC3REF signal is used as trigger output. |
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| 27 | + - "OC4REF" |
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| 28 | + OC4REF signal is used as trigger output. |
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| 29 | + |
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| 19 | 30 | Additional modes (on TRGO2 only): |
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| 20 | | - - "OC5REF" : OC5REF signal is used as trigger output. |
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| 21 | | - - "OC6REF" : OC6REF signal is used as trigger output. |
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| 31 | + |
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| 32 | + - "OC5REF" |
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| 33 | + OC5REF signal is used as trigger output. |
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| 34 | + - "OC6REF" |
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| 35 | + OC6REF signal is used as trigger output. |
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| 22 | 36 | - "compare_pulse_OC4REF": |
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| 23 | | - OC4REF rising or falling edges generate pulses. |
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| 37 | + OC4REF rising or falling edges generate pulses. |
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| 24 | 38 | - "compare_pulse_OC6REF": |
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| 25 | | - OC6REF rising or falling edges generate pulses. |
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| 39 | + OC6REF rising or falling edges generate pulses. |
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| 26 | 40 | - "compare_pulse_OC4REF_r_or_OC6REF_r": |
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| 27 | | - OC4REF or OC6REF rising edges generate pulses. |
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| 41 | + OC4REF or OC6REF rising edges generate pulses. |
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| 28 | 42 | - "compare_pulse_OC4REF_r_or_OC6REF_f": |
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| 29 | | - OC4REF rising or OC6REF falling edges generate pulses. |
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| 43 | + OC4REF rising or OC6REF falling edges generate |
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| 44 | + pulses. |
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| 30 | 45 | - "compare_pulse_OC5REF_r_or_OC6REF_r": |
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| 31 | | - OC5REF or OC6REF rising edges generate pulses. |
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| 46 | + OC5REF or OC6REF rising edges generate pulses. |
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| 32 | 47 | - "compare_pulse_OC5REF_r_or_OC6REF_f": |
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| 33 | | - OC5REF rising or OC6REF falling edges generate pulses. |
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| 48 | + OC5REF rising or OC6REF falling edges generate |
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| 49 | + pulses. |
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| 34 | 50 | |
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| 35 | | - +-----------+ +-------------+ +---------+ |
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| 36 | | - | Prescaler +-> | Counter | +-> | Master | TRGO(2) |
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| 37 | | - +-----------+ +--+--------+-+ |-> | Control +--> |
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| 38 | | - | | || +---------+ |
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| 39 | | - +--v--------+-+ OCxREF || +---------+ |
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| 40 | | - | Chx compare +----------> | Output | ChX |
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| 41 | | - +-----------+-+ | | Control +--> |
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| 42 | | - . | | +---------+ |
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| 43 | | - . | | . |
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| 44 | | - +-----------v-+ OC6REF | . |
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| 45 | | - | Ch6 compare +---------+> |
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| 46 | | - +-------------+ |
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| 51 | + :: |
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| 47 | 52 | |
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| 48 | | - Example with: "compare_pulse_OC4REF_r_or_OC6REF_r": |
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| 53 | + +-----------+ +-------------+ +---------+ |
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| 54 | + | Prescaler +-> | Counter | +-> | Master | TRGO(2) |
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| 55 | + +-----------+ +--+--------+-+ |-> | Control +--> |
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| 56 | + | | || +---------+ |
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| 57 | + +--v--------+-+ OCxREF || +---------+ |
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| 58 | + | Chx compare +----------> | Output | ChX |
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| 59 | + +-----------+-+ | | Control +--> |
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| 60 | + . | | +---------+ |
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| 61 | + . | | . |
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| 62 | + +-----------v-+ OC6REF | . |
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| 63 | + | Ch6 compare +---------+> |
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| 64 | + +-------------+ |
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| 49 | 65 | |
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| 50 | | - X |
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| 51 | | - X X |
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| 52 | | - X . . X |
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| 53 | | - X . . X |
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| 54 | | - X . . X |
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| 55 | | - count X . . . . X |
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| 56 | | - . . . . |
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| 57 | | - . . . . |
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| 58 | | - +---------------+ |
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| 59 | | - OC4REF | . . | |
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| 60 | | - +-+ . . +-+ |
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| 61 | | - . +---+ . |
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| 62 | | - OC6REF . | | . |
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| 63 | | - +-------+ +-------+ |
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| 64 | | - +-+ +-+ |
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| 65 | | - TRGO2 | | | | |
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| 66 | | - +-+ +---+ +---------+ |
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| 66 | + Example with: "compare_pulse_OC4REF_r_or_OC6REF_r":: |
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| 67 | + |
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| 68 | + X |
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| 69 | + X X |
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| 70 | + X . . X |
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| 71 | + X . . X |
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| 72 | + X . . X |
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| 73 | + count X . . . . X |
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| 74 | + . . . . |
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| 75 | + . . . . |
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| 76 | + +---------------+ |
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| 77 | + OC4REF | . . | |
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| 78 | + +-+ . . +-+ |
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| 79 | + . +---+ . |
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| 80 | + OC6REF . | | . |
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| 81 | + +-------+ +-------+ |
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| 82 | + +-+ +-+ |
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| 83 | + TRGO2 | | | | |
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| 84 | + +-+ +---+ +---------+ |
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| 67 | 85 | |
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| 68 | 86 | What: /sys/bus/iio/devices/triggerX/master_mode |
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| 69 | 87 | KernelVersion: 4.11 |
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| .. | .. |
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| 91 | 109 | When counting down the counter start from preset value |
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| 92 | 110 | and fire event when reach 0. |
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| 93 | 111 | |
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| 94 | | -What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available |
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| 95 | | -KernelVersion: 4.12 |
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| 96 | | -Contact: benjamin.gaignard@st.com |
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| 97 | | -Description: |
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| 98 | | - Reading returns the list possible quadrature modes. |
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| 99 | | - |
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| 100 | | -What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode |
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| 101 | | -KernelVersion: 4.12 |
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| 102 | | -Contact: benjamin.gaignard@st.com |
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| 103 | | -Description: |
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| 104 | | - Configure the device counter quadrature modes: |
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| 105 | | - channel_A: |
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| 106 | | - Encoder A input servers as the count input and B as |
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| 107 | | - the UP/DOWN direction control input. |
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| 108 | | - |
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| 109 | | - channel_B: |
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| 110 | | - Encoder B input serves as the count input and A as |
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| 111 | | - the UP/DOWN direction control input. |
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| 112 | | - |
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| 113 | | - quadrature: |
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| 114 | | - Encoder A and B inputs are mixed to get direction |
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| 115 | | - and count with a scale of 0.25. |
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| 116 | | - |
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| 117 | 112 | What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available |
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| 118 | 113 | KernelVersion: 4.12 |
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| 119 | 114 | Contact: benjamin.gaignard@st.com |
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| .. | .. |
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| 127 | 122 | Configure the device counter enable modes, in all case |
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| 128 | 123 | counting direction is set by in_count0_count_direction |
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| 129 | 124 | attribute and the counter is clocked by the internal clock. |
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| 125 | + |
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| 130 | 126 | always: |
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| 131 | 127 | Counter is always ON. |
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| 132 | 128 | |
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