Pre-Compiled Macro Setting - Espressif ESP8266 Technical Reference

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5.4.3. Pre-compiled Macro Setting

#define OLED_SCR
#define TFT_SCR
#define OVERLAP_TEST
Location:
\app\include\user_lcd.h
OLED_SCR and TFT_SCR can control the debugging characters displayed on the
corresponding screen. The program supports the same character shown in two screens.
Overlap_TEST is used for SPI Overlap test when TFT is used to display image. TFT should
be set at 0 as it conflicts with the displayed characters.
Espressif
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5. SPI Overlap & Display Application Guide
2016.05