Hi all.
I am after some help after updating my Arduino IDE to 2.3.2 a couple of hours ago.
I am using the Adafruit libraries as I am trying to learn to control bulk servos.
Last week (before the update) this was working fine with the only issues being my inept coding after 20+years.
Now I am constantly getting the following error
I have updated all the libraries and re downloaded the Adafruit library from the libraries manager.
I have resorted to using the default examples that are supplied with the library (PWM test) but all of them present with the same error.
My board is a MEGA 2560 and yes I have selected the correct board and com port (that was the first error I solved) This was working last week with these examples.
any suggestions would be appreciated.
Here is the code I am using directly from the examples folder
/***************************************************
This is an example for our Adafruit 16-channel PWM & Servo driver
PWM test - this will drive 16 PWMs in a 'wave'
Pick one up today in the adafruit shop!
------> http://www.adafruit.com/products/815
These drivers use I2C to communicate, 2 pins are required to
interface.
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>
// called this way, it uses the default address 0x40
Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();
// you can also call it with a different address you want
//Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver(0x41);
// you can also call it with a different address and I2C interface
//Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver(0x40, Wire);
void setup() {
Serial.begin(9600);
Serial.println("16 channel PWM test!");
pwm.begin();
/*
* In theory the internal oscillator (clock) is 25MHz but it really isn't
* that precise. You can 'calibrate' this by tweaking this number until
* you get the PWM update frequency you're expecting!
* The int.osc. for the PCA9685 chip is a range between about 23-27MHz and
* is used for calculating things like writeMicroseconds()
* Analog servos run at ~50 Hz updates, It is importaint to use an
* oscilloscope in setting the int.osc frequency for the I2C PCA9685 chip.
* 1) Attach the oscilloscope to one of the PWM signal pins and ground on
* the I2C PCA9685 chip you are setting the value for.
* 2) Adjust setOscillatorFrequency() until the PWM update frequency is the
* expected value (50Hz for most ESCs)
* Setting the value here is specific to each individual I2C PCA9685 chip and
* affects the calculations for the PWM update frequency.
* Failure to correctly set the int.osc value will cause unexpected PWM results
*/
pwm.setOscillatorFrequency(27000000);
pwm.setPWMFreq(1600); // This is the maximum PWM frequency
// if you want to really speed stuff up, you can go into 'fast 400khz I2C' mode
// some i2c devices dont like this so much so if you're sharing the bus, watch
// out for this!
Wire.setClock(400000);
}
void loop() {
// Drive each PWM in a 'wave'
for (uint16_t i=0; i<4096; i += 8) {
for (uint8_t pwmnum=0; pwmnum < 16; pwmnum++) {
pwm.setPWM(pwmnum, 0, (i + (4096/16)*pwmnum) % 4096 );
}
#ifdef ESP8266
yield(); // take a breather, required for ESP8266
#endif
}
}
