I’m having a bit of a strange issue with the PCA9685 boards. When I only want to use one it works fine but when i want to use more than one it will not work at all.
I have narrowed it down to the addressing. when I use
Adafruit_PWMServoDriver pwm1 = Adafruit_PWMServoDriver();
It works fine. no issue but when i use
Adafruit_PWMServoDriver pwm1 = Adafruit_PWMServoDriver(0x40);
Adafruit_PWMServoDriver pwm2 = Adafruit_PWMServoDriver(0x41);
It will not work at all.
Here is my code that I am trying to run. Any help is appreciated (also I should add that I do have the address pins soldered correctly. )
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>Adafruit_PWMServoDriver pwm1 = Adafruit_PWMServoDriver(0x40);
Adafruit_PWMServoDriver pwm2 = Adafruit_PWMServoDriver(0x41);#define SERVOMIN 150 // this is the ‘minimum’ pulse length count (out of 4096)
#define SERVOMAX 600 // this is the ‘maximum’ pulse length count (out of 4096)uint8_t servonum = 0;
void setup() {
Serial.begin(9600);
Serial.println(“Serial begin”);pwm1.begin();
Serial.println(“pwm 1 begin”);
pwm1.setPWMFreq(60); // Analog servos run at ~60 Hz updates
Serial.println(“pwm 1 set freq”);
pwm2.begin();
Serial.println(“pwm 2 begin”);
pwm2.setPWMFreq(60); // Analog servos run at ~60 Hz updates
Serial.println(“pwm 2 set freq”);delay(10);
}// you can use this function if you’d like to set the pulse length in seconds
// e.g. setServoPulse(0, 0.001) is a ~1 millisecond pulse width. its not precise!
void setServoPulse(uint8_t n, double pulse) {
double pulselength;pulselength = 1000000; // 1,000,000 us per second
pulselength /= 60; // 60 Hz
// Serial.print(pulselength); Serial.println(" us per period");
pulselength /= 4096; // 12 bits of resolution
//Serial.print(pulselength); Serial.println(" us per bit");
pulse *= 1000000; // convert to us
pulse /= pulselength;
//Serial.println(pulse);
Serial.println (n);
if (n >= 0 && n <=15){
pwm1.setPWM(n, 0, pulse);
}
else if (n >= 16 && n <= 31){
n = n-16;
pwm2.setPWM(n, 0, pulse);
}
}void loop() {
setServoPulse(1,0.001);
delay(500);
Serial.println(“servo 1 moved”);
setServoPulse(0,0.001);
delay(500);
Serial.println(“servo 0 moved”);
setServoPulse(1,0.0015);
delay(500);
Serial.println(“servo 1 moved”);
setServoPulse(0,0.0015);
delay(500);
Serial.println(“servo 0 moved”);setServoPulse(17,0.001);
delay(500);
Serial.println(“servo 17 moved”);
setServoPulse(18,0.001);
delay(500);
Serial.println(“servo 18 moved”);
setServoPulse(17,0.0015);
delay(500);
Serial.println(“servo 17 moved”);
setServoPulse(18,0.0015);
delay(500);
Serial.println(“servo 18 moved”);
}