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Nikon IR support for time lapse photos (#16539)

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gjdodd 2020-01-15 23:59:41 +00:00 committed by Scott Lahteine
parent bd550bb45a
commit 7481563bd9
2 changed files with 53 additions and 6 deletions
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16
Marlin/Configuration_adv.h
View file

@ -368,7 +368,7 @@
* FAST_PWM_FAN_FREQUENCY [undefined by default]
* Set this to your desired frequency.
* If left undefined this defaults to F = F_CPU/(2*255*1)
* ie F = 31.4 Khz on 16 MHz microcontrollers or F = 39.2 KHz on 20 MHz microcontrollers
* i.e., F = 31.4kHz on 16MHz microcontrollers or F = 39.2kHz on 20MHz microcontrollers.
* These defaults are the same as with the old FAST_PWM_FAN implementation - no migration is required
* NOTE: Setting very low frequencies (< 10 Hz) may result in unexpected timer behavior.
*
@ -2444,6 +2444,20 @@
// Duration to hold the switch or keep CHDK_PIN high
//#define PHOTO_SWITCH_MS 50 // (ms) (M240 D)
/**
* PHOTO_PULSES_US may need adjustment depending on board and camera model.
* Pin must be running at 48.4kHz.
* Be sure to use a PHOTOGRAPH_PIN which can rise and fall quick enough.
* (e.g., MKS SBase temp sensor pin was too slow, so used P1.23 on J8.)
*
* Example pulse data for Nikon: https://bit.ly/2FKD0Aq
* IR Wiring: https://git.io/JvJf7
*/
//#define PHOTO_PULSES_US { 2000, 27850, 400, 1580, 400, 3580, 400 } // (µs) Durations for each 48.4kHz oscillation
#ifdef PHOTO_PULSES_US
#define PHOTO_PULSE_DELAY_US 13 // (µs) Approximate duration of each HIGH and LOW pulse in the oscillation
#endif
#endif
/**

43
Marlin/src/gcode/feature/camera/M240.cpp
View file

@ -62,11 +62,44 @@
#endif
#if PIN_EXISTS(PHOTOGRAPH)
constexpr uint8_t NUM_PULSES = 16;
constexpr float PULSE_LENGTH = 0.01524;
inline void set_photo_pin(const uint8_t state) { WRITE(PHOTOGRAPH_PIN, state); _delay_ms(PULSE_LENGTH); }
inline void tweak_photo_pin() { set_photo_pin(HIGH); set_photo_pin(LOW); }
inline void spin_photo_pin() { for (uint8_t i = NUM_PULSES; i--;) tweak_photo_pin(); }
FORCE_INLINE void set_photo_pin(const uint8_t state) {
constexpr uint32_t pulse_length = (
#ifdef PHOTO_PULSES_US
PHOTO_PULSE_DELAY_US
#else
15 // 15.24 from _delay_ms(0.01524)
#endif
);
WRITE(PHOTOGRAPH_PIN, state);
delayMicroseconds(pulse_length);
}
FORCE_INLINE void tweak_photo_pin() { set_photo_pin(HIGH); set_photo_pin(LOW); }
#ifdef PHOTO_PULSES_US
inline void pulse_photo_pin(const uint32_t duration, const uint8_t state) {
if (state) {
for (const uint32_t stop = micros() + duration; micros() < stop;)
tweak_photo_pin();
}
else
delayMicroseconds(duration);
}
inline void spin_photo_pin() {
static constexpr uint32_t sequence[] = PHOTO_PULSES_US;
for (uint8_t i = 0; i < COUNT(sequence); i++)
pulse_photo_pin(sequence[i], !(i & 1));
}
#else
constexpr uint8_t NUM_PULSES = 16;
inline void spin_photo_pin() { for (uint8_t i = NUM_PULSES; i--;) tweak_photo_pin(); }
#endif
#endif
/**