Add isInTransaction to track SPI

adafruit / Adafruit_EPD

e-paper display driver for Arduino

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Closed caternuson closed 5 years ago

caternuson commented 5 years ago

Related to #7. May not be a complete fix.

Tested with graphicstest using HW SPI and SRAM_CS = -1.

epd2

ladyada commented 5 years ago

merge & release if ya like!