PPG (Pulse Generator)

Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.

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Ethernet
Servo Motor
Stepping Motor
Character LCD
SPI
I²C (Wire)
SD Card
SD (File Operations)
Periodic Operation
Clock (RTC)
PPG (Pulse Generator)
WiFiEsp
ICS (Serial Servo)

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Overview
Task
Queue
Timer
Interrupt Management

This library can generate pulse signals of up to four phases. The pin numbers for each phase are fixed as follows. To use, specify #include <PPG.h>

Phase0(pin0): 1
Phase1(pin1): 3
Phase2(pin2): 5
Phase3(pin3): 7

begin

Description

Set the phase and pulse cycle to be used.

Syntax

PPG.begin(bool pin0, bool pin1, bool pin2, bool pin3, uint32_t interval, uint8_t polarity = 0b0000)

Parameters

pin0: True/False (Used/Not used)
pin1: True/False (Used/Not used)
pin2: True/False (Used/Not used)
pin3: True/False (Used/Not used)
interval: Period (microsecond), can be specified from approximately 100µs to 500ms
polarity: In each bit, when 0 is specified, non-inverted, when 1 is specified, inverted output
   Example: In the case of 0b0001, the first phase is inverted output

Returns

None

end

Description

Release the set pin.

Syntax

PPG.end()

Parameters

None

Returns

None

setTrigger

Description

Set the trigger position of each phase. Application is performed collectively for all phases with enableTrigger.

Syntax

PPG.setTrigger(uint8_t phase, uint32_t triggerA_time, uint32_t triggerB_time)

Parameters

phase: Phase number (0 to 3)
triggerA_time: Time to reverse first
triggerB_time: Time to reverse second

Returns

None

enableTrigger

Description

Apply the setting of setTrigger ()

Syntax

PPG.enableTrigger()

Parameters

None

Returns

None

start

Description

Start pulse output.

Syntax

PPG.start()

Parameters

None

Returns

None

stop

Description

Stop the pulse output.

Syntax

PPG.stop()

Parameters

None

Returns

None

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This sample controls a two-phase DC motor. The speed is determined by the values of A0 and A1.

#include <Arduino.h>
#include <PPG.h>
 
uint32_t    motor_speed[2];
uint32_t    motor_pwm_cycle = 500;  // 500[micro-second]
void    calc_speed();
 
void    setup()
{
  PPG.begin(true, true, true, true, motor_pwm_cycle, 0b0101);
  PPG.setTrigger(0, 0, motor_pwm_cycle / 2);
  PPG.setTrigger(1, 0, motor_pwm_cycle / 2);
  PPG.setTrigger(2, 0, motor_pwm_cycle / 2);
  PPG.setTrigger(3, 0, motor_pwm_cycle / 2);
  PPG.start();
}
 
void    loop()
{
  calc_speed();
  PPG.setTrigger(0, 0, motor_speed[0]);
  PPG.setTrigger(1, 0, motor_speed[0]);
  PPG.setTrigger(2, 0, motor_speed[1]);
  PPG.setTrigger(3, 0, motor_speed[1]);
  PPG.enableTrigger();
  delay(100);
}
 
void    calc_speed()
{
  // Set spped according to A0, A1
  motor_speed[0] = map(analogRead(A0), 0, (1U<<12), 0, motor_pwm_cycle);
  motor_speed[1] = map(analogRead(A1), 0, (1U<<12), 0, motor_pwm_cycle);
}