24 lines
1.1 KiB
Markdown
24 lines
1.1 KiB
Markdown
### support for SW SPI for GxEPD2
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GxEPD2 supports only HW SPI with the unmodified library.
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The replacement files in the src directory provide the option to use SW SPI.
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This is a workaround and not very elegant, therefore it is provided as a replacement only.
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To use SW SPI with GxEPD2:
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- copy the files GxEPD2_EPD.h and GxEPD2_EPD.cpp from the subdirectoy .src to the .src directory of the library.
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- add the special call to the added init method BEFORE the normal init method:
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display.epd2.init(SW_SCK, SW_MOSI, 115200, true, 20, false); // define or replace SW_SCK, SW_MOSI
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display.init(115200); // needed to init upper level
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To use the modified library with HW SPI
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- comment out the special init call:
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//display.epd2.init(SW_SCK, SW_MOSI, 115200, true, 20, false); // define or replace SW_SCK, SW_MOSI
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display.init(115200);
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To switch back to using HW SPI during run time
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display.epd2.init(-1, -1, 115200, true, 20, false); // revert to HW SPI
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display.init(115200); // needed to init upper level
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The SW SPI allows also to read through MOSI pin from DIN of e-paper controller
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data = display.epd2._readData();
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display.epd2._readData(data, n); |