Great, Ill try it later and report back.

RSN

Thanks loboris and ESP_Sprite. Half Duplex did solve the problem related to the rxbuffer extra bytes! Still, its manageable. Loboris, as I understand how to use your driver, add spi_master_nodma.c and .h to driver and driver/include and have an #include in the app to them with this name. Still the s...

I struggled with this myself. Your main.c should now be called main.cpp. For C libraries you now need a extern C envelope (look at the beginning of the file). All esp-libraries are "extern C " protected so no need to put them inside this section BUT must put app_main(), ei your start routine, inside...

Hi guys. First post. Great forum. Thanks a lot to everybody for their time, effort and expertise that you so kindly share. Regarding the subject, I exhausted google and this forum for some answer I cannot find. Hope somebody can direct me to the proper place/forum/document. SPI Master in simple tran...