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olikraus / u8glib

Arduino Monochrom Graphics Library for LCDs and OLEDs
https://github.com/olikraus/u8glib/wiki
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Is it possible to use spi2 hw on atmega328pb? #496

Open tistructor opened 5 years ago

tistructor commented 5 years ago

I'm using an atmega328pb with arduino and I would like to use the spi2 to control an oled ssd1309 display, is it possible? or should I use the display in sw? thank you

olikraus commented 5 years ago

There is only one SPI available on your uC. You can use SW SPI or you can share the one HW SPI with other devices.

tistructor commented 5 years ago

atmega328pb has 2 spi, 2 i2c, 2 uart

tistructor commented 5 years ago

for the device I am building I cannot use the normal spi0 pins (10,11,12,13) we must use spi1 (19, 22, 23, 24) for problems of use of the pwm. I took a look at your library and I think you log in directly if you have registers not using the standard arduino spi library. I think it is enough to replace the names with the spi registers. If all the spi configuration is in the "u8g_com_atmega_hw_spi.c", "u8g_com_arduino_hw_spi.c" files it shouldn't be too difficult, I could try. Or I have to change my hardware and add chips.

olikraus commented 5 years ago

Oh, this my old lib, yes, you could update the code...

tistructor commented 5 years ago

thank you, I evaluate what is best to do.