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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1398 | - | 1 | /*------------------------------------------------------------------------------ |
| 2 | ** Ident : main.h ** |
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| 3 | ** Project : MX16s 8->10 ppm channel expander ** |
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| 4 | ** Author : lakeroe ** |
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| 5 | ** Copyright (c) : 12.2011 lakeroe ** |
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| 6 | ** Original code and idea : Jacques Wanders ** |
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| 7 | ** http://forum.mikrokopter.de/topic-4405.html ** |
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| 8 | ** http://forum.mikrokopter.de/topic-4556.html ** |
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| 9 | **----------------------------------------------------------------------------** |
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| 10 | ** Release : v1.0 initial release ** |
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| 11 | ** Date : 25-12-2011 ** |
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| 12 | **----------------------------------------------------------------------------** |
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| 13 | ** The use of this project (hardware, software, binary files, sources and ** |
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| 14 | ** documentation) is only permittet for non-commercial use ** |
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| 15 | ** (directly or indirectly) ** |
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| 16 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"** |
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| 17 | ** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ** |
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| 18 | ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ** |
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| 19 | ** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE ** |
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| 20 | ** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR ** |
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| 21 | ** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF ** |
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| 22 | ** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS ** |
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| 23 | ** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN ** |
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| 24 | ** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ** |
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| 25 | ** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ** |
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| 26 | ** POSSIBILITY OF SUCH DAMAGE. ** |
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| 27 | ------------------------------------------------------------------------------*/ |
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| 28 | |||
| 29 | #define CHANNEL_9 PORTA3 // (Pin 10) |
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| 30 | #define CHANNEL_10 PORTA4 // (Pin 9) |
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| 31 | #define PPM_IN PORTA7 // (Pin 6) |
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| 32 | #define PPM_OUT_PIN PORTB2 // (Pin 5) |
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| 33 | |||
| 34 | #define START_PULSE 400 // [0.4ms] |
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| 35 | |||
| 36 | #define PPM_PULSE_MIN 1000 // [1.0ms] |
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| 37 | #define PPM_PULSE_MAX 2000 // [2.0ms] |
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| 38 | |||
| 39 | #define MIN_SYNC_TIME 3000 // [3.0ms] |
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| 40 | #define MAX_SYNC_TIME 22000 // total frame time - 8 x min channel frame time = 22ms - 8 x 1ms = 22 - 8 |
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| 41 | |||
| 42 | // minimum channel frame = START_PULSE_HIGH + START_PULSE_LOW = 400 + 600 counts = 1000 counts = 1ms |
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| 43 | // PPM frame length = 22ms = 22000 counts |
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| 44 | |||
| 45 | #define SET_PPM_OUT_HIGH PORTB |= (1<<PPM_OUT_PIN) |
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| 46 | #define SET_PPM_OUT_LOW PORTB &= ~(1<<PPM_OUT_PIN) |
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| 47 | |||
| 48 | #define FALLING_EDGE_TRIGGER TCCR1B &= ~(1<<ICES1) |
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| 49 | #define RISING_EDGE_TRIGGER TCCR1B |= (1<<ICES1) |
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| 50 | |||
| 51 | #define SET_COMPARE_COUNTER_TO_ZERO OCR1A = 0 |
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| 52 | #define SET_COUNTER_TO_ZERO TCNT1 = 0 |
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| 53 | #define SET_CAPTURE_COUNTER_TO_ZERO ICR1 = 0 |
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| 54 | |||
| 55 | #define DISABLE_INPUT_CAPTURE TIMSK1 &= ~(1<<ICIE1) // disable input capture |
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| 56 | #define ENABLE_INPUT_CAPTURE TIMSK1 |= (1 << ICIE1) // enable input capture |
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| 57 | |||
| 58 | #define DISABLE_OUTPUT_COMPARE TIMSK1 &= ~(1<<OCIE1A) // disable Output Compare A Match Interrupt |
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| 59 | #define ENABLE_OUTPUT_COMPARE TIMSK1 |= (1<<OCIE1A) // enable Output Compare A Match Interrupt |
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| 60 | |||
| 61 | #define TRIGGER_INPUT_CAPTURE_INTERRUPT TIFR1 |= (1<<ICF1) // |
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| 62 | #define CLEAR_INPUT_CAPTURE_INTERRUPT_FLAG TIFR1 &= ~(1<<ICF1) // reset ICF flag |
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| 63 | |||
| 64 | #define TRIGGER_INPUT_COMPARE_INTERRUPT TIFR1 |= (1<<OCF1A) // |
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| 65 | |||
| 66 | #define SET_TIMER_TO_COMPA_CTC TCCR1B &= ~(1<<WGM13) // CTC mode for COMPA, prescaler 8 / 8MHz => [1.0us] |