So I know there are quite a few topics on shared SPI bus, but I still can't wrap my head around this. I have an RC522 rfid reader, which I use in SPI mode and works perfect. Then I also have a TFT display, the HXD8357D from Adafruit, which also uses the SPI bus. I know that they need to have same MOSI, MISO and SCK, but different SS pins. Yet it doesn't work. Connections are as follows:
RC522 Connections: HXD8357 Connections:
SDA (SS) - Pin 10 CS - Pin 7 SCK - Pin 13 SCK - Pin 13 MOSI - Pin 11 MOSI - Pin 11 MISO - Pin 12 MISO - Pin 12 IRQ - Not connected D/C - Pin 9 GND - GND GND - GND RST - Pin 5 3.3V - 3.3V 5V - 5V Arduino
I can of course add the code, although it's like 500 lines. Hope someone can give me a suggestion on this.