How to implement ticker callback at 100 micro seconds for ESP8266? - esp8266

Question

I have an ESP8266 NodeMCU 12E development board and I'm using the Arduino IDE. I'm trying to use a Ticker.h to sample an analog input consistently at a frequency of 10khz, which is one sample every 100us. I noticed that Ticker sampler; sampler.attach(0.0001,callbackfunc); didn't work because attach() won't take the value 0.0001.
So then I wrote the following code based on some guides that I saw:
#include <ESP8266WiFi.h>
#include <Ticker.h>
bool s = true;
void getSample()
{
s = !s;
}
Ticker tickerObject(getSample, 100, 0, MICROS_MICROS);
const char *ssid = "___"; // Change it
const char *pass = "___"; // Change it
void setup()
{
Serial.begin(115200);
Serial.println(0); //start
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, pass);
tickerObject.start();
}
void loop()
{
if(s == true)
{
Serial.println("True");
}
else
{
Serial.println("False");
}
}
However, this did not compile because tickerObject.start() method did not exist. So what I did next was:
Download the latest ticker package as a zip file
Unzip the package from point 1
Made a back up of C:\Users\john\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.5.0-beta2\libraries\Ticker
Replaced the folder mentioned in point 3 with the Ticker folder in point 2.
Restarted my Arduino IDE
Compiled and ran the code
Opened up the Serial Monitor
However, when I inspect the serial monitor, all it prints is "True". I was expecting the value s to toggle between true and false at a 10khz frequency.
What did I do wrong?

Answer 1

From the documentation of this library:
The library use no interupts of the hardware timers and works with the micros() / millis() function.
This library implements timers in software by polling the micros() and millis() functions. It requires the update() method to be called in loop().
So the start of loop() should be:
void loop()
{
tickerObject.update();
if(s == true)
I'm trying to use a Ticker.h to sample an analog input consistently at a frequency of 10khz
It is worth a go but this is a software based solution that is prone to jitter depending on how often the event loop can be called.