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/*------------------------------------------------------------------------------
** Ident : main.h **
** Project : MX16s 8->9 ppm channel expander **
** Author : lakeroe **
** Copyright (c) : 12.2011 lakeroe **
** Original code and idea : Jacques Wanders **
** http://forum.mikrokopter.de/topic-4405.html **
** http://forum.mikrokopter.de/topic-4556.html **
**----------------------------------------------------------------------------**
** Release : v1.0 initial release **
** Date : 25-12-2011 **
**----------------------------------------------------------------------------**
** The use of this project (hardware, software, binary files, sources and **
** documentation) is only permittet for non-commercial use **
** (directly or indirectly) **
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"**
** AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE **
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE **
** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE **
** LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR **
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF **
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS **
** INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN **
** CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) **
** ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE **
** POSSIBILITY OF SUCH DAMAGE. **
------------------------------------------------------------------------------*/
#define CHANNEL_9 PORTA3 // (Pin 10)
#define PPM_IN PORTA7 // (Pin 6)
#define PPM_OUT_PIN PORTB2 // (Pin 5)
#define START_PULSE 400 // [0.4ms]
#define PPM_PULSE_MIN 1000 // [1.0ms]
#define PPM_PULSE_MAX 2000 // [2.0ms]
#define MIN_SYNC_TIME 3000 // [3.0ms]
#define MAX_SYNC_TIME 22000 // total frame time - 8 x min channel frame time = 22ms - 8 x 1ms = 22 - 8
// minimum channel frame = START_PULSE_HIGH + START_PULSE_LOW = 400 + 600 counts = 1000 counts = 1ms
// PPM frame length = 22ms = 22000 counts
#define SET_PPM_OUT_HIGH PORTB |= (1<<PPM_OUT_PIN)
#define SET_PPM_OUT_LOW PORTB &= ~(1<<PPM_OUT_PIN)
#define FALLING_EDGE_TRIGGER TCCR1B &= ~(1<<ICES1)
#define RISING_EDGE_TRIGGER TCCR1B |= (1<<ICES1)
#define SET_COMPARE_COUNTER_TO_ZERO OCR1A = 0
#define SET_COUNTER_TO_ZERO TCNT1 = 0
#define SET_CAPTURE_COUNTER_TO_ZERO ICR1 = 0
#define DISABLE_INPUT_CAPTURE TIMSK1 &= ~(1<<ICIE1) // disable input capture
#define ENABLE_INPUT_CAPTURE TIMSK1 |= (1 << ICIE1) // enable input capture
#define DISABLE_OUTPUT_COMPARE TIMSK1 &= ~(1<<OCIE1A) // disable Output Compare A Match Interrupt
#define ENABLE_OUTPUT_COMPARE TIMSK1 |= (1<<OCIE1A) // enable Output Compare A Match Interrupt
#define TRIGGER_INPUT_CAPTURE_INTERRUPT TIFR1 |= (1<<ICF1) //
#define CLEAR_INPUT_CAPTURE_INTERRUPT_FLAG TIFR1 &= ~(1<<ICF1) // reset ICF flag
#define TRIGGER_INPUT_COMPARE_INTERRUPT TIFR1 |= (1<<OCF1A) //
#define SET_TIMER_TO_COMPA_CTC TCCR1B &= ~(1<<WGM13) // CTC mode for COMPA, prescaler 8 / 8MHz => [1.0us]