ESP8266 I2S signal generator

Community General Discussion
1

Hello,

I'm trying to set up ESP8266 I2S RX pin signal generator from

https://github.com/roberttidey/espI2sClockGen

but I receive

'i2scSetMSArrayItem' was not declared in this scope compile error. What could be the issue ? I have all the required libraries installed.

2

The issue clearly described in the error message.
Where you get the code from?

4

Code is at

https://www.instructables.com/Esp8266-Clock-and-Pulse-Generator/

It is also on the github link I sent.

5

According to the error, you have not installed "i2sTXcircular.h" library

7

Library is installed. I've tested this basic code bellow with the same init, just to see if library is working fine. And it works. But the original code doesn't.

#define ESP8266
#include <arduino.h>
#include <i2sTXcircular.h>

void setup() {
  // Initialize I2S clock generator
  i2scInit(512, 16000000 / (Div1 * Div2), Div1, 0, 0);
  // Buffer size: 512, Clock rate determined by Div1 and Div2, 16 MHz base clock

  // Set mark and space durations directly
  i2scSetMSArrayItem(0, 1, 1, 0);
  // Mark bits: 4, Space bits: 4, Repeat: 0

  // Begin I2S clock generation
  i2scBegin();
}

void loop() {
}
8

Please show a full IDE output with error message

9

Unfortunately, I'm getting too many error messages so I will try to generate frequency manually.

#define ESP8266
#include <arduino.h>
#include <i2sTXcircular.h>

void setup() {
  
  // Initialize I2S clock generator
  i2scInit(512, 16000000, -1, 0, 0);  // 1MHZ
  //i2scInit(512, 8000000, -1, 0, 0);  // 500khz

  // Set mark and space durations directly
  i2scSetMSArrayItem(0, 4, 4, 0);
  // Mark bits: 4, Space bits: 4, Repeat: 0

  // Begin I2S clock generation
  i2scBegin();
}

void loop() {
 }

I've managed to generate 1mhz and 500khz using this code above. How can I use i2scInit initialiser to build a function that will generate a desired frequency ? I need a range from 10hz to 1mhz.

10

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