Hello my friend

[SkyNet26]

Help with the FastPID library. When the feedback changes, the output changes between 0 and 1.

[mike-matera]

Can you provide example code?

[SkyNet26]

---

• PID Basic Example
• Reading analog input 0 to control analog PWM output 3 ****/

include

define PIN_INPUT A1

define PIN_OUTPUT 10

double Kp=0, Ki=0, Kd=1; uint16_t deadband = 0; int output_bits = 1; bool output_signed = false;

FastPID myPID(Kp, Ki, Kd, deadband, output_bits, output_signed);

void setup() { Serial.begin(9600); }

void loop() { int setpoint = 500; int feedback = analogRead(PIN_INPUT); int output = myPID.step(setpoint, feedback); analogWrite(PIN_OUTPUT, 255 - output); Serial.print("sp: "); Serial.print(setpoint); Serial.print(" fb: "); Serial.print(feedback); Serial.print(" out: "); Serial.println(output); delay(100); }

[SkyNet26]

sp: 500 fb: 256 out: 0 sp: 500 fb: 258 out: 0 sp: 500 fb: 260 out: 0 sp: 500 fb: 275 out: 0 sp: 500 fb: 327 out: 0 sp: 500 fb: 361 out: 0 sp: 500 fb: 379 out: 0 sp: 500 fb: 297 out: 1 sp: 500 fb: 276 out: 1 sp: 500 fb: 261 out: 1 sp: 500 fb: 253 out: 1 sp: 500 fb: 251 out: 1 sp: 500 fb: 224 out: 1 sp: 500 fb: 199 out: 1 sp: 500 fb: 149 out: 1 sp: 500 fb: 111 out: 1 sp: 500 fb: 124 out: 0 sp: 500 fb: 133 out: 0 sp: 500 fb: 145 out: 0 sp: 500 fb: 159 out: 0

[SkyNet26]

Please tell me why the library does not work, values do not increase more than 1.

[mike-matera]

Hi, It's a bug in the example code! Sorry! There's a new version of the example that works with the latest release. The example you have will work if you change this line:

int output_bits = 1;

to this:

int output_bits = 8;

Sorry for the confusion!

[SkyNet26]

Thank you!

сб, 21 апр. 2018 г., 19:24 Mike Matera notifications@github.com:

Hi, It's a bug in the example code! Sorry! There's a new version of the example that works with the latest release. The example you have will work if you change this line:

int output_bits = 1;

to this:

int output_bits = 8;

Sorry for the confusion!

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