Adafruit GFX and ESP8266

Libraries
1

Hi,

I’m unable to compile example sketch from Adafruit_ST7789 library. It uses Adafruit GFX. During compile process I receive errors like this:

.pio\libdeps\d1_mini_pro\GFX Library for Arduino\src\Arduino_TFT.cpp: In member function 'virtual void Arduino_TFT::drawChar(int16_t, int16_t, unsigned char, uint16_t, uint16_t)':
.pio\libdeps\d1_mini_pro\GFX Library for Arduino\src\Arduino_TFT.cpp:1120:1: error: a15 cannot be used in asm here
 }
 ^
.pio\libdeps\d1_mini_pro\GFX Library for Arduino\src\Arduino_TFT.cpp:1120:1: error: a15 cannot be used in asm here
*** [.pio\build\d1_mini_pro\lib114\GFX Library for Arduino\Arduino_TFT.cpp.o] Error 1

How to resolve this problem.

CONFIGURATION: https://docs.platformio.org/page/boards/espressif8266/d1_mini_pro.html
PLATFORM: Espressif 8266 (2.6.3) > WeMos D1 mini Pro
HARDWARE: ESP8266 80MHz, 80KB RAM, 16MB Flash       
PACKAGES:
 - framework-arduinoespressif8266 3.20704.0 (2.7.4) 
 - tool-esptool 1.413.0 (4.13)
 - tool-esptoolpy 1.30000.201119 (3.0.0)
 - toolchain-xtensa 2.40802.200502 (4.8.2)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 35 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <Adafruit ST7735 and ST7789 Library> 1.6.1
|   |-- <Adafruit GFX Library> 1.10.6
|   |   |-- <SPI> 1.0
|   |   |-- <Adafruit BusIO> 1.7.2
|   |   |   |-- <Wire> 1.0
|   |   |   |-- <SPI> 1.0
|   |   |-- <Wire> 1.0
|   |-- <SPI> 1.0
|-- <GFX Library for Arduino> 1.0.7
|   |-- <SPI> 1.0
|-- <Adafruit BusIO> 1.7.2
|   |-- <Wire> 1.0
|   |-- <SPI> 1.0
|-- <Adafruit seesaw Library> 1.3.1
|   |-- <Wire> 1.0
|-- <Adafruit GFX Library> 1.10.6
|   |-- <SPI> 1.0
|   |-- <Adafruit BusIO> 1.7.2
|   |   |-- <Wire> 1.0
|   |   |-- <SPI> 1.0
|   |-- <Wire> 1.0
|-- <SPI> 1.0
|-- <Wire> 1.0
2

How does this library get in here? This is not Adafruit’s GFX library, at least by name.

What’s the full platformio.ini with which this is reproducable?

3

My platformio.ini

[env:d1_mini_pro]
platform = espressif8266
board = d1_mini_pro
framework = arduino
monitor_speed = 115200
lib_deps = 
	adafruit/Adafruit ST7735 and ST7789 Library@^1.6.1
	moononournation/GFX Library for Arduino@^1.0.7
	adafruit/Adafruit BusIO@^1.7.2
	adafruit/Adafruit seesaw Library@^1.3.1
4

I’m getting the same erorr as you. I’m using your platformio.ini, I place the graphicstest.ino in my src/ folder and add

#include <Arduino.h>
#include <Wire.h>

at the top, and the result is

.pio\libdeps\d1_mini_pro\GFX Library for Arduino\src\Arduino_TFT.cpp: In member function 'virtual void Arduino_TFT::drawChar(int16_t, int16_t, unsigned char, uint16_t, uint16_t)':
.pio\libdeps\d1_mini_pro\GFX Library for Arduino\src\Arduino_TFT.cpp:1125:1: error: a15 cannot be used in asm here
 }
 ^

The issue is that this GFX Library for Arduino is somehow being pulled in when it shouldn’t be.

Adding

lib_ignore = GFX Library for Arduino

to the platformio.ini makes it work again.

I’ll open an issue at the core about that.

5

Issue opened per PIO finds "GFX Library for Arduino" library, breaks Adafruit GFX firmwares · Issue #3899 · platformio/platformio-core · GitHub, until then workaround is in place.

6

Thank you very much! It’s working :slight_smile: