From 7481563bd98b43b2add28ac912b12043b1c2ef94 Mon Sep 17 00:00:00 2001 From: gjdodd <31553294+gjdodd@users.noreply.github.com> Date: Wed, 15 Jan 2020 23:59:41 +0000 Subject: [PATCH] Nikon IR support for time lapse photos (#16539) --- Marlin/Configuration_adv.h | 16 ++++++++- Marlin/src/gcode/feature/camera/M240.cpp | 43 +++++++++++++++++++++--- 2 files changed, 53 insertions(+), 6 deletions(-) diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h index 4685198fc..ec2e995e9 100644 --- a/Marlin/Configuration_adv.h +++ b/Marlin/Configuration_adv.h @@ -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 /** diff --git a/Marlin/src/gcode/feature/camera/M240.cpp b/Marlin/src/gcode/feature/camera/M240.cpp index 46ee958eb..147dfccf0 100644 --- a/Marlin/src/gcode/feature/camera/M240.cpp +++ b/Marlin/src/gcode/feature/camera/M240.cpp @@ -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 /**