Bug Report: ESP32 S does not work

[Jvsjvs]

EX-DCCInspector Version

9.1.0

Bug description

I have a board with an ESP32 S on it.

I use this board to decode DCC signals which works perfectly (on GPIO 4). So I know that the board works and that the DCC interface works. The board is connected to the track and currently controlling turnouts.

If I download your firmware to this board and configure it to use GPIO4 and disable the OLED display it does not work:

• Http server starts and hosts the website
• It reports zero activity on the DCC bus while the board is connected to a valid DCC signal.

If I flash my own SW the board again functions perfectly, decodes DCC and controls the connected turnouts.

Any idea what could go wrong, I guess it has to do with the "S" version of the ESP32.

Steps to reproduce the bug

Run the software on a board with an ESP32 S

Expected behaviour

Activity on the DCC track should be detected, it currently detects nothing.

Screenshots

No response

Hardware in use

ESP32S populated board (own design)

Additional context

No response

[habazut]

What version of inspector What version of ESP32 framework Do you not get any capture interrupts at all or are all packets discarded with wrong times? Do a print just to be sure you got the right input pin (default is GPIO5).

Harald.

[Jvsjvs]

Hi,

• For the inspector I did a git clone https://github.com/DCC-EX/DCCInspector-EX.git to get a copy of the archive and build that.
• For the ESP32 framework: PACKAGES:
  • framework-arduinoespressif32 @ 3.20016.0 (2.0.16)
  • tool-esptoolpy @ 1.40501.0 (4.5.1)
  • toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
  • toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5
• When the inspector starts it reports that it is indeed using pin 4

  
   DCC Packet Analyze initialising
   INPUTPIN=4

- I don't see any interrupts being reported.

• Bit Count/4 sec=0 (Zeros=0, Ones=0), Glitches=0 Valid Packets=0, NMRA out of spec=0, Checksum Errors=0, Lost pkts=0, Long pkts=0 0 half-bit length (us): 1 half-bit length (us):

My config.h file:

/ Copyright (c) 2021 Neil McKechnie

• This Library is free software: you can redistribute it and/or modify
• it under the terms of the GNU General Public License as published by
• the Free Software Foundation, either version 3 of the License, or
• (at your option) any later version.
• This Library is distributed in the hope that it will be useful,
• but WITHOUT ANY WARRANTY; without even the implied warranty of
• MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
• GNU General Public License for more details.
• You should have received a copy of the GNU General Public License
• along with this software. If not, see
• http://www.gnu.org/licenses/. */

ifndef config_h

define config_h

// The following logic should work for all supported platforms, hopefully.

if defined(ARDUINO_heltec_wifi_kit_32) || defined(ARDUINO_WIFI_KIT_32)

define ARDUINO_HELTEC_WIFI_KIT_32

endif

if defined(ESP_PLATFORM)

if !defined(ESP32)

#define ESP32

endif

elif defined(ESP8266)

// nothing needs done here.

elif defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO)

define ARDUINO_UNO_NANO

elif defined(ARDUINO_AVR_MEGA2560)

define ARDUINO_MEGA

else

error "Platform not recognised"

endif

// Uncomment the "#define USE_DIO2" to use the 'Fast digital i/o library' DIO2 // in place of the normal digitalRead() and digitalWrite(). // Reduces CPU load by about 17%. Only applicable to Arduino Uno/Mega/Nano. //#define USE_DIO2

// Uncomment the "#define USETIMER" to perform the timing using the ATmega328's // and ESP32's Input Capture mode which captures the time through hardware instead // of software. This enables a higher accuracy and consistency, and because we can capture the // Timer counter register (TCNTn) at the time of the digital change, it is immune to // timing errors caused by other interrupts. // Works on Arduino Uno (Timer1/pin D8) // Arduino Nano (Timer1/pin D8) // Arduino Mega (Timer4/pin D49) // If we don't use this, then the selected input pin must support change interrupt // (defaults to pin D2 on Uno, Nano and Mega, GPIO2 on ESP8266 and GPIO5 on ESP32.

define USETIMER

// Input pin definitions. Defaults: // Nano (USETIMER): 8 // Uno (USETIMER): 8 // Mega (USETIMER): 49 // Nano/Uno/Mega, Non-USETIMER: 2 // ESP32: 5 // ESP8266: 2 // Other: 2

if defined(USETIMER)

if defined(ARDUINO_UNO_NANO)

#define INPUTPIN 8

elif defined(ARDUINO_MEGA)

#define INPUTPIN 49

elif defined(ESP32)

#define INPUTPIN 4

else

// Assume timer not supported, use default pin
#undef USETIMER
#define INPUTPIN 2

endif

else

if defined(ESP32)

#define INPUTPIN 4

else

#define INPUTPIN 2

endif

endif

// Uncomment following lines to enable OLED output on pins SDA_OLED and SCL_OLED. // (ESP or Mega only). //#define USE_OLED

if defined(ESP8266) // Heltec Kit 8 has pins 4/15 for I2C.

define SDA_OLED 4

define SCL_OLED 5

define OLED_RESET 16

define OLED_I2CADDRESS 0x3C

define SCREEN_WIDTH 128

define SCREEN_HEIGHT 32

elif defined(ARDUINO_HELTEC_WIFI_KIT_32) // Heltec Kit 32 has pins 4/15 predefined for I2C.

// #define SDA_OLED 4 // #define SCL_OLED 15

define OLED_RESET 16

define OLED_I2CADDRESS 0x3C

define SCREEN_WIDTH 128

define SCREEN_HEIGHT 64

else // Other boards - edit as appropriate.

define SDA_OLED 33

define SCL_OLED 34

define OLED_RESET 48

define OLED_I2CADDRESS 0x3D

define SCREEN_WIDTH 128

define SCREEN_HEIGHT 64

endif

// Button for selecting new page on OLED. The button action is carried out // when the pin goes from 1 to 0 (pull-up is enabled).

define BUTTONPIN 0

// LED pin definitions - uncomment and assign as required.

define LEDPIN_ACTIVE 2 // Shows interrupts being received, ie DCC active

//#define LEDPIN_LOCOSPEED 3 // Driven from loco speed packet for loco 3

define LEDPIN_DECODING 1 // lights when a packet with valid checksum is received

//#define LEDPIN_FAULT 6 // Lights when a checksum error or glitch is encountered.

// Uncomment the following line to enable HTTP Server (ESP32 or ESP8266 only).

define USE_HTTPSERVER

// SSID and password can be configured here. However, the server will, by preference, // connect using the same credentials as last time; if that fails it will try WPS; // only if that fails too, will it use the credentials below.

define WIFI_SSID "......"

define WIFI_PASSWORD "......"

// Name used by mDNS to register the device. On some browsers it can be accessed // through this name with a ".local" suffix (e.g. http://DccInspector.local/).

define DNSNAME "DccInspector"

// OLED isn't supported on Uno or Nano

if defined(ARDUINO_UNO_NANO)

if defined(USE_OLED)

#undef USE_OLED

endif

endif

// HTTP Server isn't supported on Uno or Nano or Mega

if defined(ARDUINO_UNO_NANO) | defined(ARDUINO_MEGA)

if defined(USE_HTTPSERVER)

#undef USE_HTTPSERVER

endif

endif

define SERIAL_SPEED 115200

if defined(ESP32) || defined(ESP8266) || defined(ESP_PLATFORM)

define INTERRUPT_SAFE IRAM_ATTR

else

define INTERRUPT_SAFE

endif

endif

Any idea what could be wrong?

[habazut]

The ESP32 uses the mcpwm capture mechanism which should be the same on the ESP32-S3, but who knows with espressif? Does setting the IDF debug level to max verbose give any more information? No, I don't have any more ideas and I don't have any S3. Harald.

[Jvsjvs]

Problem solved. The SW works as is on an ESP32-S.

My own SW was a bit more tolerant to the input signal. I changed the input filter on my board a bit and now the Inspector also works on my board.

Thanks.