I'm wondering which pad on the DigiSpark is for D0
I mentioned earlier:
You are not translating D0, you are using available pins on the Digispark that have the same function but are otherwise unrelated to the pins in the example code. It doesn’t matter what “D0” means except that is has a function which PB1 can do.
Would I use the same pinout if I were using the other potentiometer for the other axis
Yes, you can use the other axis in the same way. I chose that one because it looked like the easiest to constrain mechanically if you choose to modify it into a single axis with no center return.
You are going to have to do some troubleshooting. I have to do some things here so I won't be around for a while. I will try to set up the same basic arrangement you have when I get the chance so I can see what it is doing.
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analogRead(1).analogWrite() function, we will light the on-board LED proportional to the potentiometer's position as determined by the read from above. It uses the map() that scales val so it represents what should be applied to the PWM generation immediately after. // Program an ATTINY85 to set position of servo by position of potentiometer.
// Pot connected to pin A1, servo connected to pin D0
int val;
void setup()
{
pinMode(PB3, OUTPUT); // Defines PB3 as output for servo
digitalWrite (PB3, LOW); // Sets servo output low
}
void loop()
{
val = analogRead(1); // Reads position of potentiometer from pin 2
val = map(val, 0, 1024, 1000, 2000); // Scales the input range to pulse length values (uS)
analogWrite (PB1, val-1000); // Lights on-board LED with relative PWM value as an indicator
digitalWrite (PB3, HIGH); // Positive pulse
delayMicroseconds (val);
digitalWrite (PB3, LOW);
delay (16); // Sets the frame rate
}Thank you
I don’t know about the ESC‘s beeps, but the potentiometer probably needs a resistor inline with it to scale the range. Do you have a DMM measure the resistance of the pot? The two outside pins will be the value of the pot.
DMM is that a multimeter
Yes, a Digital Multimeter (DMM), You can measure the unused pot, it should be the same. Yes, the probe the two outside pins.
/* Cobbled together from the library example code for a test. It produces a good PWM waveform
* The library code is here: https://github.com/digistump/DigisparkArduinoIntegration/tree/master/libraries/DigisparkTinySoftPwm
*/
#include <TinySoftPwm.h>
int val;
void setup() {
pinMode(PB3, OUTPUT); // Defines PB3 as output
TinySoftPwm_begin(128, 0); /* 128 x TinySoftPwm_process() calls before overlap (Frequency tuning), 0 = PWM init for all declared pins */
}
void loop()
{
static uint32_t StartUs=micros();
static uint32_t StartMs=millis();
static uint8_t Pwm=0;
static int8_t Dir=1;
/***********************************************************/
/* Call TinySoftPwm_process() with a period of 60 us */
/* The PWM frequency = 128 x 60 # 7.7 ms -> F # 130Hz */
/* 128 is the first argument passed to TinySoftPwm_begin() */
/***********************************************************/
if((micros() - StartUs) >= 60)
{
/* We arrived here every 60 microseconds */
StartUs=micros();
TinySoftPwm_process(); /* This function shall be called periodically (like here, based on micros(), or in a timer ISR) */
}
/*************************************************************/
/* period of 10 ms */
/*************************************************************/
if((millis()-StartMs) >= 10)
{
StartMs=millis();
Pwm = analogRead(1); // Reads position of potentiometer from pin 2
Pwm = map(Pwm, 0, 1023, 0, 255);; // Scales the input range to PWM parameter
TinySoftPwm_analogWrite(PB3, Pwm); // Writes to output
TinySoftPwm_analogWrite(PB1, Pwm); // Writes to built in LED
}
}I believe the scaling of the 0-1024 from the analog read to the 0-256 of the PWM needs work. But the library produces good signals. I noticed the library example had something like “RC KING” in the comments at the top which suggests there might be someone who is both expert in the library and your application. If you go to that link and look at the example, there might be contact information, or enough to make a successful search.
Servo testers are built for the purpose of testing a hobby RC servo. Their output is one cycle every 20 ms and is on for somewhere between 1 & 2 ms.
