ManuelW/grbl-LPC-CoreXY
1
0
Fork 0
Code Issues Pull Requests Releases 1 Wiki Activity

spindle pwm

Browse Source
This commit is contained in:
Todd Fleming
2017-01-12 19:28:38 -05:00
parent 6f13d0d18b
commit 4e9d5f78b4
6 changed files with 91 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
grbl/config.h
View File

@ -209,7 +209,7 @@
// NOTE: If VARIABLE_SPINDLE is enabled(default), this option has no effect as the PWM output and
// spindle enable are combined to one pin. If you need both this option and spindle speed PWM,
// uncomment the config option USE_SPINDLE_DIR_AS_ENABLE_PIN below.
// #define INVERT_SPINDLE_ENABLE_PIN // Default disabled. Uncomment to enable.
// not ported #define INVERT_SPINDLE_ENABLE_PIN // Default disabled. Uncomment to enable.
// Inverts the selected coolant pin from low-disabled/high-enabled to low-enabled/high-disabled. Useful
// for some pre-built electronic boards.
@ -333,12 +333,37 @@
// tool length offset value is subtracted from the current location.
#define TOOL_LENGTH_OFFSET_AXIS Z_AXIS // Default z-axis. Valid values are X_AXIS, Y_AXIS, or Z_AXIS.
// Enables variable spindle output voltage for different RPM values. On the Arduino Uno, the spindle
// enable pin will output 5V for maximum RPM with 256 intermediate levels and 0V when disabled.
// NOTE: IMPORTANT for Arduino Unos! When enabled, the Z-limit pin D11 and spindle enable pin D12 switch!
// The hardware PWM output on pin D11 is required for variable spindle output voltages.
// Enables variable spindle output voltage for different RPM values.
#define VARIABLE_SPINDLE // Default enabled. Comment to disable.
// RPM Scaling on LPC17xx
//
// 0 SPINDLE_PWM_OFF_VALUE SPINDLE_PERIOD
// | | |
// |---|---|--------------------------|----|
// | |
// SPINDLE_PWM_MIN_VALUE SPINDLE_PWM_MAX_VALUE
//
// settings.rpm_min settings.rpm_max
// |--------------------------|
// ^
// gcode S value
//
// if(S <= 0)
// pwm = SPINDLE_PWM_OFF_VALUE;
// else if(S <= settings.rpm_min)
// pwm = SPINDLE_PWM_MIN_VALUE;
// else if(S >= settings.rpm_max)
// pwm = SPINDLE_PWM_MAX_VALUE;
// else
// pwm = scaled value. settings.rpm_min scales to SPINDLE_PWM_MIN_VALUE. settings.rpm_max
// scales to SPINDLE_PWM_MAX_VALUE.
#define SPINDLE_PWM_PERIOD (SystemCoreClock / 40000) // SystemCoreClock / frequency
#define SPINDLE_PWM_OFF_VALUE (SPINDLE_PWM_PERIOD * 0.0) // SPINDLE_PWM_PERIOD * fraction
#define SPINDLE_PWM_MIN_VALUE (SPINDLE_PWM_PERIOD * 0.0) // SPINDLE_PWM_PERIOD * fraction
#define SPINDLE_PWM_MAX_VALUE (SPINDLE_PWM_PERIOD * 1.0) // SPINDLE_PWM_PERIOD * fraction
// Used by variable spindle output only. This forces the PWM output to a minimum duty cycle when enabled.
// The PWM pin will still read 0V when the spindle is disabled. Most users will not need this option, but
// it may be useful in certain scenarios. This minimum PWM settings coincides with the spindle rpm minimum
@ -348,7 +373,7 @@
// in mind that you will begin to lose PWM resolution with increased minimum PWM values, since you have less
// and less range over the total 255 PWM levels to signal different spindle speeds.
// NOTE: Compute duty cycle at the minimum PWM by this equation: (% duty cycle)=(SPINDLE_PWM_MIN_VALUE/255)*100
// #define SPINDLE_PWM_MIN_VALUE 5 // Default disabled. Uncomment to enable. Must be greater than zero. Integer (1-255).
// define now lives above. #define SPINDLE_PWM_MIN_VALUE 5 // Default disabled. Uncomment to enable. Must be greater than zero. Integer (1-255).
// By default on a 328p(Uno), Grbl combines the variable spindle PWM and the enable into one pin to help
// preserve I/O pins. For certain setups, these may need to be separate pins. This configure option uses
@ -358,7 +383,7 @@
// NOTE: BEWARE! The Arduino bootloader toggles the D13 pin when it powers up. If you flash Grbl with
// a programmer (you can use a spare Arduino as "Arduino as ISP". Search the web on how to wire this.),
// this D13 LED toggling should go away. We haven't tested this though. Please report how it goes!
// #define USE_SPINDLE_DIR_AS_ENABLE_PIN // Default disabled. Uncomment to enable.
// not ported #define USE_SPINDLE_DIR_AS_ENABLE_PIN // Default disabled. Uncomment to enable.
// With this enabled, Grbl sends back an echo of the line it has received, which has been pre-parsed (spaces
// removed, capitalized letters, no comments) and is to be immediately executed by Grbl. Echoes will not be
@ -626,6 +651,7 @@
// hard limits not ported #define LIMIT_PCMSK PCMSK0 // Pin change interrupt register
// Define spindle enable and spindle direction output pins.
/* not ported
#define SPINDLE_ENABLE_DDR DDRB
#define SPINDLE_ENABLE_PORT PORTB
// Z Limit pin and spindle PWM/enable pin swapped to access hardware PWM on Pin 11.
@ -644,6 +670,7 @@
#define SPINDLE_DIRECTION_PORT PORTB
#define SPINDLE_DIRECTION_BIT 5 // Uno Digital Pin 13 (NOTE: D13 can't be pulled-high input due to LED.)
#endif
*/
// Define flood and mist coolant enable output pins.
#define COOLANT_FLOOD_DDR DDRC
@ -675,31 +702,16 @@
#define PROBE_BIT 5 // Uno Analog Pin 5
#define PROBE_MASK (1<<PROBE_BIT)
// Variable spindle configuration below. Do not change unless you know what you are doing.
// NOTE: Only used when variable spindle is enabled.
#define SPINDLE_PWM_MAX_VALUE 255 // Don't change. 328p fast PWM mode fixes top value as 255.
#ifndef SPINDLE_PWM_MIN_VALUE
#define SPINDLE_PWM_MIN_VALUE 1 // Must be greater than zero.
#endif
#define SPINDLE_PWM_OFF_VALUE 0
#define SPINDLE_PWM_RANGE (SPINDLE_PWM_MAX_VALUE-SPINDLE_PWM_MIN_VALUE)
#define SPINDLE_TCCRA_REGISTER TCCR2A
#define SPINDLE_TCCRB_REGISTER TCCR2B
#define SPINDLE_OCR_REGISTER OCR2A
#define SPINDLE_COMB_BIT COM2A1
// Prescaled, 8-bit Fast PWM mode.
#define SPINDLE_TCCRA_INIT_MASK ((1<<WGM20) | (1<<WGM21)) // Configures fast PWM mode.
// #define SPINDLE_TCCRB_INIT_MASK (1<<CS20) // Disable prescaler -> 62.5kHz
// #define SPINDLE_TCCRB_INIT_MASK (1<<CS21) // 1/8 prescaler -> 7.8kHz (Used in v0.9)
// #define SPINDLE_TCCRB_INIT_MASK ((1<<CS21) | (1<<CS20)) // 1/32 prescaler -> 1.96kHz
#define SPINDLE_TCCRB_INIT_MASK (1<<CS22) // 1/64 prescaler -> 0.98kHz (J-tech laser)
// NOTE: On the 328p, these must be the same as the SPINDLE_ENABLE settings.
#define SPINDLE_PWM_DDR DDRB
#define SPINDLE_PWM_PORT PORTB
#define SPINDLE_PWM_BIT 3 // Uno Digital Pin 11
// The LPC17xx has 6 PWM channels. Each channel has 2 pins. It can drive both pins simultaneously to the same value.
//
// PWM Channel PWM1_CH1 PWM1_CH2 PWM1_CH3 PWM1_CH4 PWM1_CH5 PWM1_CH6
// Primary pin P1.18 P1.20 P1.21 P1.23 P1.24 P1.26
// Secondary pin P2.0 P2.1 P2.2 P2.3 P2.4 P2.6
#define SPINDLE_PWM_CHANNEL PWM1_CH5
#define SPINDLE_PWM_USE_PRIMARY_PIN false
#define SPINDLE_PWM_USE_SECONDARY_PIN true
// Stepper current control
#define CURRENT_I2C Driver_I2C1 // I2C driver for current control. Comment out to disable.
#define CURRENT_MCP44XX_ADDR 0b0101100 // Address of MCP44XX
#define CURRENT_WIPERS {0, 1, 6, 7}; // Wiper registers (X, Y, Z, A)
@ -722,7 +734,7 @@
#define DEFAULT_X_MAX_TRAVEL 200.0 // mm
#define DEFAULT_Y_MAX_TRAVEL 200.0 // mm
#define DEFAULT_Z_MAX_TRAVEL 200.0 // mm
#define DEFAULT_SPINDLE_RPM_MAX 1000.0 // rpm
#define DEFAULT_SPINDLE_RPM_MAX 1.0 // rpm
#define DEFAULT_SPINDLE_RPM_MIN 0.0 // rpm
#define DEFAULT_STEP_PULSE_MICROSECONDS 1
#define DEFAULT_STEPPING_INVERT_MASK 0