I am at a loss as to why I can't get any communication between 2 teensy 3.6's. I am using a pull-up resistor (tried 4.7k and 2.2k). I've seen a variety of posts with similar issues. I had it working with an Uno to 3.2.
Trying a "Scanner" example didn't show any broadcaster/master, yet the master seems to be running properly as it is very basic code and pretty sure wired properly. Here's an image of the basic wiring ... both are wired the same.
Ultimately I need to send values of a couple variables to teensy's that control stepper motors (via TeensyStep). I have posted my previous code at the bottom which I need to expand so that I can retrieve several integer variables (motorSpeed, acceleration, enable, etc). Really hoping someone can help resolve my issues. Thanks!
MASTER EXAMPLE:
SLAVE EXAMPLE:
PREVIOUS WORKING CODE:
Trying a "Scanner" example didn't show any broadcaster/master, yet the master seems to be running properly as it is very basic code and pretty sure wired properly. Here's an image of the basic wiring ... both are wired the same.
Ultimately I need to send values of a couple variables to teensy's that control stepper motors (via TeensyStep). I have posted my previous code at the bottom which I need to expand so that I can retrieve several integer variables (motorSpeed, acceleration, enable, etc). Really hoping someone can help resolve my issues. Thanks!
MASTER EXAMPLE:
Code:
// Wire Master Writer
#include <Wire.h>
int led = LED_BUILTIN;
void setup()
{
pinMode(led, OUTPUT);
Wire.begin(); // join i2c bus (address optional for master)
}
byte x = 0;
void loop()
{
digitalWrite(led, HIGH); // briefly flash the LED
Wire.beginTransmission(9); // transmit to device #9
Wire.write("x is "); // sends five bytes
Wire.write(x); // sends one byte
Wire.endTransmission(); // stop transmitting
digitalWrite(led, LOW);
x++;
delay(500);
}SLAVE EXAMPLE:
Code:
// Wire Slave Receiver
#include <Wire.h>
int led = LED_BUILTIN;
void setup()
{
pinMode(led, OUTPUT);
Wire.begin(9); // join i2c bus with address #9
Wire.onReceive(receiveEvent); // register event
Serial.begin(9600); // start serial for output
}
void loop()
{
delay(100);
}
// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany)
{
digitalWrite(led, HIGH); // briefly flash the LED
while(Wire.available() > 1) { // loop through all but the last
char c = Wire.read(); // receive byte as a character
Serial.print(c); // print the character
}
int x = Wire.read(); // receive byte as an integer
Serial.println(x); // print the integer
digitalWrite(led, LOW);
}PREVIOUS WORKING CODE:
Code:
#include <Wire.h>
#include <StepControl.h>
unsigned long targetInterval = 5000; // read speed from master
unsigned long pulsePerSec = 1000000/targetInterval;
//Step, Dir
Stepper M1(23, 22), M2(21, 20), M3(17, 16), M4(15, 14), M5(12, 11), M6(10, 9), M7(8, 7), M8(6, 5), M9(4, 3);
StepControl<> controller; // Use default settings
constexpr int spr = 16*200; // 3200 steps per revolution
int acceleration = 1500;
int pullInSpeed = 100;
const byte numMotors = 9;
int microSteps = 4;
int PPR = 5000; //pulses per rotation wo microstepping
int targetDist[numMotors] = {100*spr}; //50x decent
//int S1MaxSpeed[numMotors] = {50000};
//int S1MaxSpeed[numMotors] = {1*PPR*microSteps};
int S1MaxSpeed[numMotors] = {8000};
int scene = 0;
// SCL/SDA Stuff
byte b[3]; //byte array
bool flag1 = LOW;
void setup() {
delay(2000);
Wire.begin(8); // join i2c bus with address #8
Wire.onReceive(receiveEvent); // register event
Serial.begin(9600); // start serial for output
delay(4000);
Stepper* motorSet_A[] = {&M1, &M2, &M3, &M4, &M5, &M6, &M7, &M8, &M9};
for (int i = 0; i < numMotors; i++) {
motorSet_A[i]->setPullInSpeed(pullInSpeed);
motorSet_A[i]->setAcceleration(acceleration);
}
}
void loop() {
Stepper* motorSet_A[] = {&M1, &M2, &M3, &M4, &M5, &M6, &M7, &M8, &M9};
scene = 0;
// if (scene != lastScene){ // only go through if scene changes
switch (scene){
case 0:
M1.setMaxSpeed(S1MaxSpeed[0]);
M2.setMaxSpeed(S1MaxSpeed[0]);
M3.setMaxSpeed(S1MaxSpeed[0]);
M4.setMaxSpeed(S1MaxSpeed[0]);
M5.setMaxSpeed(S1MaxSpeed[0]);
M6.setMaxSpeed(S1MaxSpeed[0]);
M7.setMaxSpeed(S1MaxSpeed[0]);
M8.setMaxSpeed(S1MaxSpeed[0]);
M9.setMaxSpeed(S1MaxSpeed[0]);
M1.setTargetRel(targetDist[0]);
M2.setTargetRel(targetDist[0]);
M3.setTargetRel(targetDist[0]);
M4.setTargetRel(targetDist[0]);
M5.setTargetRel(targetDist[0]);
M6.setTargetRel(targetDist[0]);
M7.setTargetRel(targetDist[0]);
M8.setTargetRel(targetDist[0]);
M9.setTargetRel(targetDist[0]);
Stepper* motorSet_A[] = {&M1, &M2, &M3, &M4, &M5, &M6, &M7, &M8, &M9};
// for (int i = 0; i < numMotors; i++) { // loop through all motors in motorSet_A...
// motorSet_A[i]->setTargetRel(targetDist[i]); // ... set targets to 0...
// motorSet_A[i]->setMaxSpeed(S1MaxSpeed[i]);
// Serial.print(i); Serial.print(": MaxSpeed "); Serial.println(S1MaxSpeed[i]);
// Serial.print(i); Serial.print(": targetDist "); Serial.println(targetDist[i]);
// }
Serial.print("M1: MaxSpeed "); Serial.println(S1MaxSpeed[0]);
Serial.print("M1: TargetDist "); Serial.println(targetDist[0]);
break;
// default:
// Serial.println("error");
// break;
}
// lastScene = scene;
// }
if (flag1 == HIGH){
if (b[0] == '*')
{
targetInterval = (b[1] << 8) | b[2];
pulsePerSec = 1000000/targetInterval; //OLD SPEED STUFF
// Serial.print("Slave Speed: ");
// Serial.println(targetInterval, DEC); //target speed
flag1 = LOW;
}
}
controller.move(motorSet_A);
delay(5000);
}
void receiveEvent(int howMany){
for (int i = 0; i < howMany; i++){
b[i] = Wire.read();
}
flag1 = HIGH;
}