VCNL3020 driver i wrote for bed levelling

[parabyte]

Is your feature request related to a problem? Please describe.

please consider adding this to marlin

vcnl3020.cpp

Are you looking for hardware support?

No response

Describe the feature you want

please consider adding this to marlin

Additional context

No response

[parabyte]

/**
 * Cubicon VCNL3020 proximity driver 
 *
 * 
 */

#pragma once

#include "../inc/MarlinConfig.h"

#if ENABLED(CUBICON_VCNL3020_DRIVER)

#include <stdint.h>
#include <stdbool.h>

#define VCNL3020_ADDR           0x13

#define VCNL3020_CMD            0x80
#define VCNL3020_PROD_ID        0x81
#define VCNL3020_PROX_RATE      0x82
#define VCNL3020_LED_CURRENT    0x83
#define VCNL3020_PROX_RESULT_H  0x87
#define VCNL3020_PROX_RESULT_L  0x88

bool vcnl3020_write_register(uint8_t reg_addr, uint8_t value);
bool vcnl3020_read_register(uint8_t reg_addr, uint8_t *value);
bool vcnl3020_init(void);
uint16_t vcnl3020_read_proximity(void);

#endif // CUBICON_VCNL3020_DRIVER

[parabyte]

just so you are aware, on my closed sourced machine this sensor is configured without a interupt pin. hence no interrupt

[parabyte]

here is something less crappy, i decided to stop using it as a literal endstop switch/trigger and decided to use this as inspiration RobbieJKatz VCNL3020

i am using this as a z probe sensor now, been playing with this all day, as not been at work!

and came up with this

vcnl3020.cpp

#pragma once

/**
 * VCNL3020 Proximity Sensor Z Probe
 *
 * An I2C-based proximity sensor used as a Z probe.
 * Since the interrupt pin is not exposed, this implementation
 * uses polling mode to read proximity values.
 */

#include <stdint.h>

// Default I2C address for VCNL3020
#ifndef VCNL3020_I2C_ADDR
  #define VCNL3020_I2C_ADDR 0x13
#endif

// Default proximity threshold for triggering (higher = closer)
#ifndef VCNL3020_PROXIMITY_THRESHOLD
  #define VCNL3020_PROXIMITY_THRESHOLD 2500
#endif

// VCNL3020 Register addresses
#define VCNL3020_REG_COMMAND        0x80
#define VCNL3020_REG_PRODUCT_ID     0x81
#define VCNL3020_REG_PROX_RATE      0x82
#define VCNL3020_REG_IR_LED_CURRENT 0x83
#define VCNL3020_REG_PROX_HI        0x87
#define VCNL3020_REG_PROX_LO        0x88
#define VCNL3020_REG_INT_CONTROL    0x89
#define VCNL3020_REG_LOW_THRESH_HI  0x8A
#define VCNL3020_REG_LOW_THRESH_LO  0x8B
#define VCNL3020_REG_HIGH_THRESH_HI 0x8C
#define VCNL3020_REG_HIGH_THRESH_LO 0x8D
#define VCNL3020_REG_INT_STATUS     0x8E
#define VCNL3020_REG_PROX_MOD       0x8F

// Command register bits
#define VCNL3020_CMD_PROX_OD        0x08  // Start single proximity measurement
#define VCNL3020_CMD_PROX_DATA_RDY  0x20  // Proximity data ready flag
#define VCNL3020_CMD_SELFTIMED_EN   0x01  // Self-timed mode enable
#define VCNL3020_CMD_PROX_EN        0x02  // Proximity enable

// Expected Product ID
#define VCNL3020_PRODUCT_ID         0x21

class VCNL3020_Probe {
public:
  static bool triggered;              // Current trigger state (true = probe triggered)
  static uint16_t last_proximity;     // Last read proximity value
  static uint16_t threshold;          // Proximity threshold for triggering

  /**
   * Initialize the VCNL3020 sensor
   * @return true if initialization successful, false otherwise
   */
  static bool init();

  /**
   * Read proximity value from the sensor
   * @return 16-bit proximity value (higher = closer)
   */
  static uint16_t read_proximity();

  /**
   * Update the probe trigger state
   * Call this periodically (from temperature ISR or main loop)
   */
  static void update();

  /**
   * Check if probe is currently triggered
   * @return true if proximity exceeds threshold
   */
  static bool is_triggered() { return triggered; }

  /**
   * Get the last read proximity value
   * @return Raw 16-bit proximity reading
   */
  static uint16_t get_proximity() { return last_proximity; }

  /**
   * Set the proximity threshold
   * @param thresh New threshold value
   */
  static void set_threshold(uint16_t thresh) { threshold = thresh; }

  /**
   * Check if sensor is connected and responding
   * @return true if sensor responds with correct product ID
   */
  static bool check_connection();

private:
  static bool initialized;

  /**
   * Write a byte to a VCNL3020 register
   */
  static void write_register(uint8_t reg, uint8_t data);

  /**
   * Read a byte from a VCNL3020 register
   */
  static uint8_t read_register(uint8_t reg);
};

extern VCNL3020_Probe vcnl3020;

[thinkyhead]

Please consider submitting a PR, because you might be the only person in the world who cares enough.

I once did a VCNL4020 driver as part of a contract, and it wasn't the most reliable type of probe.

[parabyte]

yeah this cubicon single 3dp 110f has a very shiny i believe silver plated bed for i assume that reason, among other reasons,

I should mention here that the cubicon single 3dp 110f does not expose the sensors interrupt, i tried to but i was unaware the sensor was mounted to a pcb, i assumed it was all the same package, its incredibly tiny! absolutely no chance of me exposing that pin myself.

[parabyte]

ill certainly push my drivers, when i am happy/verify how well it works in a actual printing situation, i cant print yet on this machine as i need to reverse engineer the bed and create conversion pcb's, but with my crude hand under sensor and issuing gcode commands to marlin all seems fine. but obviously far from real world usage. im happy if you wished to add this into marlin yourself at this point to help others in my situation with this sensor. but im unhappy about sharing my goofy Configuration*h literal total mess, of my own personal comments etc