touchRead(32) and touchRead(33) pins are swapped

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After some long debugging sessions I just found out that the Arduino function touchRead(pin) swaps pins 32 and 33. So touchRead(32) does in fact check pin 33 and vice versa.
Quite unexpected result
Will have to explore further when I'll have the time...

[OutOfLine]

Somehow my follow up has disappeared, so I summarize:
The issue is in the esp32-arduino software.
Please react in the thread in the Arduino subforum
"How to check Arduino version" https://www.esp32.com/viewtopic.php?f=19&t=17741

[OutOfLine]

Short summary of what i found out so far:
In esp32-arduino touchRead(32) and touchRead(33) do read the pins swapped, while analogRead() works as expected.
I see this on all the different boards I have tested.

try this:

Code: Select all

void setup() {
  Serial.begin(500000);
  Serial.println("TEST: touchRead(32) and touchRead(33) are swapped\n");
  delay(3000);
}

void loop() {
  Serial.print("touch(32) ");
  Serial.print(touchRead(32));
  Serial.print("\ttouch(33) ");
  Serial.print(touchRead(33));

  Serial.print("\tanalog(32) ");
  Serial.print(analogRead(32));
  Serial.print("\ta(33) ");
  Serial.println(analogRead(33));
  delay(500);
}

If you touch pin 32 or pin 33 you will see what I mean.
Even better when you connect one of the pins to ground:

Code: Select all

// pin 32 connected to GND
touch(32) 136	touch(33) 0	analog(32) 0	a(33) 732

// pin 33 connected to GND
touch(32) 0	touch(33) 131	analog(32) 1001	a(33) 0

Workaround based on the following commit:
https://github.com/espressif/arduino-es ... 1a63579378
change file esp32-hal-gpio.c

Code: Select all

// ~/.arduino15/packages/esp32/hardware/esp32/1.0.4/cores/esp32/esp32-hal-gpio.c
// lines 62, 63
    {0x1c, 9, 4, 9},
    {0x20, 8, 5, 8},
 // change to
    {0x1c, 9, 4, 8},
    {0x20, 8, 5, 9},

This is a bad hack, as it bypasses git, but it works for me.

I had no success trying to find and checkout the right development branch yet.
I have started here https://github.com/espressif/arduino-es ... structions

Help would be much appreciated...

[OutOfLine]

Installing new esp32-arduino version 1.0.5-rc1 fixes the issue