analogWriteFreq(new_frequency) function doesn't have syntax highlight

[TSblue]

Please fill the info fields, it helps to get you faster support ;)

if you have a stack dump decode it:
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/stack_dump.md

for better debug messages:
https://github.com/esp8266/Arduino/blob/master/doc/Troubleshooting/debugging.md

----------------------------- Remove above -----------------------------

Basic Infos

Hardware

Hardware: ESP-12
Core Version: 2.1.0-rc2

Description

Problem description

Settings in IDE

Module: ?Generic ESP8266 Module?
Flash Size: 4MB
CPU Frequency: 80Mhz
Flash Mode: ?qio?
Flash Frequency: ?40Mhz?
Upload Using: ?OTA / SERIAL?
Reset Method: ?ck / nodemcu?

Sketch

#include <ESP8266WiFi.h>
   
void setup() {
  pinMode(15,OUTPUT);
}

void loop() {
    analogWrite(15,0.5);
    analogWriteFreq();
}

### Debug Messages

messages here

[devyte]

@TSblue this issue makes no sense. If what you're trying to do is change the color of a light by using pwm, then changing the frequency doesn't do that. You need to change the pwm duty output, which is done with analogWrite().
Closing due to lack of info.

[igrr]

I think 'the color' means the text color in IDE. I.e. the function is not added to the keywords file, so doesn't get highlighted by the IDE the way analogWrite does.
I think we should fix this.

[vdeconinck]

Am I correct that syntax highlighting is done through a keywords.txt that should be dedicated to these cores (supported by Arduino since 1.6.6) but we don't have that file until now ?

[igrr]

You are correct, we don't have keywords.txt for the core. PRs welcome :)

[vdeconinck]

OK I'm taking this

[vdeconinck]

Just filed PR 3743.
I admit I could not figure out how to make the third field (link to reference) work for documentation sitting outside of the main Arduino install dir .
For those interested, the only "specification" I could find about the keywords.txt file is at https://spencer.bliven.us/index.php/2012/01/18/arduino-ide-keywords/

[igrr]

Thank you, merged.

[vickuuuy]

What is that 0.5 means in the code

[vdeconinck]

What is that 0.5 means in the code

It probably was a mistake by the OP. IIRC analogWrite() takes an integer value as second argument, in a range defined by analogWriteRange().
But that particular snippet was just to illustrate non-working syntax highlighting and that issue has been fixed.

[vickuuuy]

What is that 0.5 means in the code

It probably was a mistake by the OP. IIRC analogWrite() takes an integer value as second argument, in a range defined by analogWriteRange(). But that particular snippet was just to illustrate non-working syntax highlighting and that issue has been fixed.

To set he frequency which value i need to give in analogeWritefreq()?

[vdeconinck]

Remember that this "analog" output actually is PWM. I guess you know what PWM is - if not, please read https://randomnerdtutorials.com/esp8266-pwm-arduino-ide/ - so depending on your application, the default frequency of 1000 (=1kHz) may or may not be OK.
As your question is not related to this issue, I suggest you turn to a search engine, and you'll find tons of documentation about analog outputs. e.g the first result for "analogWriteFreq esp8266" is that page https://arduino-esp8266.readthedocs.io/en/latest/reference.html . The section "Analog Output" includes hints at what values to use.