ESP32 and tft_espi compile errors

sigmund.aas · July 27, 2023, 9:59am

I’m new to platformio, and I’ve been going in circles here trying to compile an example sketch (TFT_Matrix) from the tft_espi library. Adafruit GFX is installed with all dependencies, but I’m getting errors about missing files:

Processing lolin_d32_pro (platform: espressif32; board: lolin_d32_pro; framework: arduino)
------------------------------------------------------------------------------------------------------------------------------------------Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/lolin_d32_pro.html
PLATFORM: Espressif 32 (6.1.0) > WEMOS LOLIN D32 PRO
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
 - framework-arduinoespressif32 @ 3.20007.0 (2.0.7)
 - tool-esptoolpy @ 1.40500.0 (4.5.0)
 - toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch5
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 36 compatible libraries
Scanning dependencies...
Dependency Graph
|-- TFT_eSPI @ 2.5.31
|-- Adafruit GFX Library @ 1.11.7
|-- SPI @ 2.0.0
Building in release mode
Compiling .pio\build\lolin_d32_pro\src\main.cpp.o
Building .pio\build\lolin_d32_pro\bootloader.bin
Generating partitions .pio\build\lolin_d32_pro\partitions.bin
esptool.py v4.5
Creating esp32 image...
Merged 1 ELF section
Successfully created esp32 image.
Compiling .pio\build\lolin_d32_pro\lib981\SPI\SPI.cpp.o
Compiling .pio\build\lolin_d32_pro\libd4e\FS\FS.cpp.o
Compiling .pio\build\lolin_d32_pro\libd4e\FS\vfs_api.cpp.o
Compiling .pio\build\lolin_d32_pro\lib448\SPIFFS\SPIFFS.cpp.o
Compiling .pio\build\lolin_d32_pro\liba03\LittleFS\LittleFS.cpp.o
Archiving .pio\build\lolin_d32_pro\lib981\libSPI.a
Compiling .pio\build\lolin_d32_pro\libd98\TFT_eSPI\TFT_eSPI.cpp.o
Compiling .pio\build\lolin_d32_pro\lib16f\Adafruit GFX Library\Adafruit_GFX.cpp.o
Compiling .pio\build\lolin_d32_pro\lib16f\Adafruit GFX Library\Adafruit_GrayOLED.cpp.o
In file included from src/main.cpp:18:
.pio/libdeps/lolin_d32_pro/TFT_eSPI/TFT_eSPI.h:975:8: warning: #warning >>>>------>> TOUCH_CS pin not defined, TFT_eSPI touch functions will not be available! [-Wcpp]
       #warning >>>>------>> TOUCH_CS pin not defined, TFT_eSPI touch functions will not be available!
        ^~~~~~~
src/main.cpp: In function 'void setup()':
src/main.cpp:39:3: error: 'setupScrollArea' was not declared in this scope
   setupScrollArea(TOP_FIXED_AREA, BOT_FIXED_AREA);
   ^~~~~~~~~~~~~~~
src/main.cpp: In function 'void loop()':
src/main.cpp:53:13: error: 'scroll_slow' was not declared in this scope
     yDraw = scroll_slow(TEXT_HEIGHT, 14); // Scroll, 14ms per pixel line
             ^~~~~~~~~~~
src/main.cpp:53:13: note: suggested alternative: 'strcoll_l'
     yDraw = scroll_slow(TEXT_HEIGHT, 14); // Scroll, 14ms per pixel line
             ^~~~~~~~~~~
             strcoll_l
src/main.cpp:63:31: error: 'scroll_slow' was not declared in this scope
   while (1) {yield(); yDraw = scroll_slow(320,5); }// Scroll 320 lines, 5ms per line
                               ^~~~~~~~~~~
src/main.cpp:63:31: note: suggested alternative: 'strcoll_l'
   while (1) {yield(); yDraw = scroll_slow(320,5); }// Scroll 320 lines, 5ms per line
                               ^~~~~~~~~~~
                               strcoll_l
src/main.cpp: In function 'int scroll_slow(int, int)':
src/main.cpp:82:5: error: 'scrollAddress' was not declared in this scope
     scrollAddress(yStart);
     ^~~~~~~~~~~~~
src/main.cpp:82:5: note: suggested alternative: 'IPAddress'
     scrollAddress(yStart);
     ^~~~~~~~~~~~~
     IPAddress
*** [.pio\build\lolin_d32_pro\src\main.cpp.o] Error 1
In file included from .pio/libdeps/lolin_d32_pro/Adafruit GFX Library/Adafruit_GrayOLED.h:29,
                 from .pio/libdeps/lolin_d32_pro/Adafruit GFX Library/Adafruit_GrayOLED.cpp:20:
.pio/libdeps/lolin_d32_pro/Adafruit GFX Library/Adafruit_GFX.h:12:10: fatal error: Adafruit_I2CDevice.h: No such file or directory        

****************************************************************************
* Looking for Adafruit_I2CDevice.h dependency? Check our library registry!
*
* CLI  > platformio lib search "header:Adafruit_I2CDevice.h"
* Web  > https://registry.platformio.org/search?q=header:Adafruit_I2CDevice.h
*
****************************************************************************

 #include <Adafruit_I2CDevice.h>
          ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
In file included from .pio/libdeps/lolin_d32_pro/Adafruit GFX Library/Adafruit_GFX.cpp:34:
.pio/libdeps/lolin_d32_pro/Adafruit GFX Library/Adafruit_GFX.h:12:10: fatal error: Adafruit_I2CDevice.h: No such file or directory        

****************************************************************************
* Looking for Adafruit_I2CDevice.h dependency? Check our library registry!
*
* CLI  > platformio lib search "header:Adafruit_I2CDevice.h"
* Web  > https://registry.platformio.org/search?q=header:Adafruit_I2CDevice.h
*
****************************************************************************

 #include <Adafruit_I2CDevice.h>
          ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
*** [.pio\build\lolin_d32_pro\lib16f\Adafruit GFX Library\Adafruit_GrayOLED.cpp.o] Error 1
*** [.pio\build\lolin_d32_pro\lib16f\Adafruit GFX Library\Adafruit_GFX.cpp.o] Error 1
In file included from .pio/libdeps/lolin_d32_pro/TFT_eSPI/TFT_eSPI.cpp:16:
.pio/libdeps/lolin_d32_pro/TFT_eSPI/TFT_eSPI.h:975:8: warning: #warning >>>>------>> TOUCH_CS pin not defined, TFT_eSPI touch functions will not be available! [-Wcpp]
       #warning >>>>------>> TOUCH_CS pin not defined, TFT_eSPI touch functions will not be available!
        ^~~~~~~
====================================================== [FAILED] Took 59.32 seconds ======================================================

maxgerhardt · July 27, 2023, 10:56am

You’re using the contents of an .ino sketch as a .cpp file without doing the necessary conversion. If you want the least amount of work and you just want to check out whether the sketch works, rename src/main.cpp → src/main.ino and press build again. If you want to develop your code based on that sketch, I’d heavily recommend staying with .cpp and doing the above conversion.

sigmund.aas · July 27, 2023, 11:27am

Thanks for the link. I’ve added the arduino include and renamed the file, but I haven’t added any function declarations. So for every declaration error I have to add an empty function declaration? How do I add a function with two parameters? This didn’t work:
void setupScrollArea(int num, int num);

sigmund.aas · July 27, 2023, 11:46am

Sorry, stupid question there… I’ve been away from C for a while. I found the functions in the library and added:

void setupScrollArea(uint16_t, uint16_t);

int scroll_slow(int, int);

void scrollAddress(uint16_t);

Moreover, I had to add Adafruit BusIO library and Wire.