andrey
/
Marlin_FB4S
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

⚡️ PWM for ESP32 I2S expander (#24193)

FB4S_WIFI
John Robertson 3 years ago
committed by Scott Lahteine
parent
7677368aaf
commit
c34dd64469
14 changed files with 104 additions and 46 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 5
      Marlin/Configuration_adv.h
  2. 2
      Marlin/Makefile
  3. 50
      Marlin/src/HAL/ESP32/HAL.cpp
  4. 11
      Marlin/src/HAL/ESP32/HAL.h
  5. 20
      Marlin/src/HAL/ESP32/i2s.cpp
  6. 7
      Marlin/src/HAL/ESP32/inc/Conditionals_adv.h
  7. 4
      Marlin/src/HAL/ESP32/inc/SanityCheck.h
  8. 4
      Marlin/src/module/stepper.cpp
  9. 9
      Marlin/src/pins/esp32/pins_E4D.h
  10. 8
      Marlin/src/pins/esp32/pins_ENWI_ESPNP.h
  11. 8
      Marlin/src/pins/esp32/pins_ESP32.h
  12. 8
      Marlin/src/pins/esp32/pins_ESPA_common.h
  13. 5
      Marlin/src/pins/esp32/pins_MKS_TINYBEE.h
  14. 9
      Marlin/src/pins/esp32/pins_MRR_ESPE.h

5
Marlin/Configuration_adv.h
View File

@ -3592,7 +3592,10 @@
#if ENABLED(SPINDLE_LASER_USE_PWM)
#define SPINDLE_LASER_PWM_INVERT false // Set to "true" if the speed/power goes up when you want it to go slower
#define SPINDLE_LASER_FREQUENCY 2500 // (Hz) Spindle/laser frequency (only on supported HALs: AVR, ESP32, and LPC)
#endif
// ESP32: If SPINDLE_LASER_PWM_PIN is onboard then <=78125Hz. For I2S expander
// the frequency determines the PWM resolution. 2500Hz = 0-100, 977Hz = 0-255, ...
// (250000 / SPINDLE_LASER_FREQUENCY) = max value.
#endif
//#define AIR_EVACUATION // Cutter Vacuum / Laser Blower motor control with G-codes M10-M11
#if ENABLED(AIR_EVACUATION)

2
Marlin/Makefile
View File

@ -109,7 +109,7 @@ LIQUID_TWI2 ?= 0
# This defines if Wire is needed
WIRE ?= 0
# This defines if Tone is needed (i.e SPEAKER is defined in Configuration.h)
# This defines if Tone is needed (i.e., SPEAKER is defined in Configuration.h)
# Disabling this (and SPEAKER) saves approximately 350 bytes of memory.
TONE ?= 1

50
Marlin/src/HAL/ESP32/HAL.cpp
View File

@ -65,6 +65,7 @@ portMUX_TYPE MarlinHAL::spinlock = portMUX_INITIALIZER_UNLOCKED;
// ------------------------
uint16_t MarlinHAL::adc_result;
pwm_pin_t MarlinHAL::pwm_pin_data[MAX_EXPANDER_BITS];
// ------------------------
// Private Variables
@ -330,21 +331,46 @@ int8_t get_pwm_channel(const pin_t pin, const uint32_t freq, const uint16_t res)
}
void MarlinHAL::set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=_BV(PWM_RESOLUTION)-1*/, const bool invert/*=false*/) {
const int8_t cid = get_pwm_channel(pin, PWM_FREQUENCY, PWM_RESOLUTION);
if (cid >= 0) {
uint32_t duty = map(invert ? v_size - v : v, 0, v_size, 0, _BV(PWM_RESOLUTION)-1);
ledcWrite(cid, duty);
}
#if ENABLED(I2S_STEPPER_STREAM)
if (pin > 127) {
const uint8_t pinlo = pin & 0x7F;
pwm_pin_t &pindata = pwm_pin_data[pinlo];
const uint32_t duty = map(invert ? v_size - v : v, 0, v_size, 0, pindata.pwm_cycle_ticks);
if (duty == 0 || duty == pindata.pwm_cycle_ticks) { // max or min (i.e., on/off)
pindata.pwm_duty_ticks = 0; // turn off PWM for this pin
duty ? SBI32(i2s_port_data, pinlo) : CBI32(i2s_port_data, pinlo); // set pin level
}
else
pindata.pwm_duty_ticks = duty; // PWM duty count = # of 4µs ticks per full PWM cycle
}
else
#endif
{
const int8_t cid = get_pwm_channel(pin, PWM_FREQUENCY, PWM_RESOLUTION);
if (cid >= 0) {
const uint32_t duty = map(invert ? v_size - v : v, 0, v_size, 0, _BV(PWM_RESOLUTION)-1);
ledcWrite(cid, duty);
}
}
}
int8_t MarlinHAL::set_pwm_frequency(const pin_t pin, const uint32_t f_desired) {
const int8_t cid = channel_for_pin(pin);
if (cid >= 0) {
if (f_desired == ledcReadFreq(cid)) return cid; // no freq change
ledcDetachPin(chan_pin[cid]);
chan_pin[cid] = 0; // remove old freq channel
}
return get_pwm_channel(pin, f_desired, PWM_RESOLUTION); // try for new one
#if ENABLED(I2S_STEPPER_STREAM)
if (pin > 127) {
pwm_pin_data[pin & 0x7F].pwm_cycle_ticks = 1000000UL / f_desired / 4; // # of 4µs ticks per full PWM cycle
return 0;
}
else
#endif
{
const int8_t cid = channel_for_pin(pin);
if (cid >= 0) {
if (f_desired == ledcReadFreq(cid)) return cid; // no freq change
ledcDetachPin(chan_pin[cid]);
chan_pin[cid] = 0; // remove old freq channel
}
return get_pwm_channel(pin, f_desired, PWM_RESOLUTION); // try for new one
}
}
// use hardware PWM if avail, if not then ISR

11
Marlin/src/HAL/ESP32/HAL.h
View File

@ -68,6 +68,9 @@
#define PWM_RESOLUTION 10u // Default PWM bit resolution
#define CHANNEL_MAX_NUM 15u // max PWM channel # to allocate (7 to only use low speed, 15 to use low & high)
#define MAX_PWM_IOPIN 33u // hardware pwm pins < 34
#ifndef MAX_EXPANDER_BITS
#define MAX_EXPANDER_BITS 32 // I2S expander bit width (max 32)
#endif
// ------------------------
// Types
@ -76,6 +79,12 @@
typedef double isr_float_t; // FPU ops are used for single-precision, so use double for ISRs.
typedef int16_t pin_t;
typedef struct pwm_pin {
uint32_t pwm_cycle_ticks = 1000000UL / (PWM_FREQUENCY) / 4; // # ticks per pwm cycle
uint32_t pwm_tick_count = 0; // current tick count
uint32_t pwm_duty_ticks = 0; // # of ticks for current duty cycle
} pwm_pin_t;
class Servo;
typedef Servo hal_servo_t;
@ -197,6 +206,8 @@ public:
// Free SRAM
static int freeMemory();
static pwm_pin_t pwm_pin_data[MAX_EXPANDER_BITS];
//
// ADC Methods
//

20
Marlin/src/HAL/ESP32/i2s.cpp
View File

@ -337,6 +337,26 @@ uint8_t i2s_state(uint8_t pin) {
}
void i2s_push_sample() {
// Every 4µs (when space in DMA buffer) toggle each expander PWM output using
// the current duty cycle/frequency so they sync with any steps (once
// through the DMA/FIFO buffers). PWM signal inversion handled by other functions
LOOP_L_N(p, MAX_EXPANDER_BITS) {
if (hal.pwm_pin_data[p].pwm_duty_ticks > 0) { // pin has active pwm?
if (hal.pwm_pin_data[p].pwm_tick_count == 0) {
if (TEST32(i2s_port_data, p)) { // hi->lo
CBI32(i2s_port_data, p);
hal.pwm_pin_data[p].pwm_tick_count = hal.pwm_pin_data[p].pwm_cycle_ticks - hal.pwm_pin_data[p].pwm_duty_ticks;
}
else { // lo->hi
SBI32(i2s_port_data, p);
hal.pwm_pin_data[p].pwm_tick_count = hal.pwm_pin_data[p].pwm_duty_ticks;
}
}
else
hal.pwm_pin_data[p].pwm_tick_count--;
}
}
dma.current[dma.rw_pos++] = i2s_port_data;
}

7
Marlin/src/HAL/ESP32/inc/Conditionals_adv.h
View File

@ -20,3 +20,10 @@
*
*/
#pragma once
//
// Board-specific options need to be defined before HAL.h
//
#if MB(MKS_TINYBEE)
#define MAX_EXPANDER_BITS 24 // TinyBee has 3 x HC595
#endif

4
Marlin/src/HAL/ESP32/inc/SanityCheck.h
View File

@ -48,3 +48,7 @@
#if USING_PULLDOWNS
#error "PULLDOWN pin mode is not available on ESP32 boards."
#endif
#if BOTH(I2S_STEPPER_STREAM, LIN_ADVANCE)
#error "I2S stream is currently incompatible with LIN_ADVANCE."
#endif

4
Marlin/src/module/stepper.cpp
View File

@ -1898,9 +1898,7 @@ void Stepper::pulse_phase_isr() {
#endif
#endif
#if ENABLED(I2S_STEPPER_STREAM)
i2s_push_sample();
#endif
TERN_(I2S_STEPPER_STREAM, i2s_push_sample());
// TODO: need to deal with MINIMUM_STEPPER_PULSE over i2s
#if ISR_MULTI_STEPS

9
Marlin/src/pins/esp32/pins_E4D.h
View File

@ -40,19 +40,14 @@
#define BOARD_WEBSITE_URL "github.com/Exilaus/E4d@box"
#define DEFAULT_MACHINE_NAME BOARD_INFO_NAME
//
// Disable I2S stepper stream
//
#undef I2S_STEPPER_STREAM
//
// Redefine I2S for ESP32
//
#undef I2S_WS
#define I2S_WS 23
#undef I2S_BCK
#define I2S_BCK 22
#undef I2S_DATA
#define I2S_WS 23
#define I2S_BCK 22
#define I2S_DATA 21
//

8
Marlin/src/pins/esp32/pins_ENWI_ESPNP.h
View File

@ -35,9 +35,11 @@
// I2S (steppers & other output-only pins)
//
#define I2S_STEPPER_STREAM
#define I2S_WS 17
#define I2S_BCK 22
#define I2S_DATA 21
#if ENABLED(I2S_STEPPER_STREAM)
#define I2S_WS 17
#define I2S_BCK 22
#define I2S_DATA 21
#endif
//
// Servos

8
Marlin/src/pins/esp32/pins_ESP32.h
View File

@ -33,9 +33,11 @@
// I2S (steppers & other output-only pins)
//
#define I2S_STEPPER_STREAM
#define I2S_WS 25
#define I2S_BCK 26
#define I2S_DATA 27
#if ENABLED(I2S_STEPPER_STREAM)
#define I2S_WS 25
#define I2S_BCK 26
#define I2S_DATA 27
#endif
//
// Limit Switches

8
Marlin/src/pins/esp32/pins_ESPA_common.h
View File

@ -32,14 +32,6 @@
#define DEFAULT_MACHINE_NAME BOARD_INFO_NAME
#endif
//
// Disable I2S stepper stream, by default
//
#undef I2S_STEPPER_STREAM
#undef I2S_WS
#undef I2S_BCK
#undef I2S_DATA
//
// Limit Switches
//

5
Marlin/src/pins/esp32/pins_MKS_TINYBEE.h
View File

@ -40,6 +40,8 @@
#define BOARD_WEBSITE_URL "https://github.com/makerbase-mks"
#define DEFAULT_MACHINE_NAME BOARD_INFO_NAME
// MAX_EXPANDER_BITS is defined for MKS TinyBee in HAL/ESP32/inc/Conditionals_adv.h
//
// Servos
//
@ -61,9 +63,6 @@
#define I2S_WS 26
#define I2S_BCK 25
#define I2S_DATA 27
#if ENABLED(LIN_ADVANCE)
#error "I2S stream is currently incompatible with LIN_ADVANCE."
#endif
#endif
//

9
Marlin/src/pins/esp32/pins_MRR_ESPE.h
View File

@ -52,11 +52,10 @@
// Enable I2S stepper stream
//
#define I2S_STEPPER_STREAM
#define I2S_WS 26
#define I2S_BCK 25
#define I2S_DATA 27
#if ENABLED(LIN_ADVANCE)
#error "I2S stream is currently incompatible with LIN_ADVANCE."
#if ENABLED(I2S_STEPPER_STREAM)
#define I2S_WS 26
#define I2S_BCK 25
#define I2S_DATA 27
#endif
//

Write Preview
Loading…
Cancel
Save