I am using the RPi Model B Revision 2 with BCM2836 chip. I've put my efforts in finding the datasheet for BCM2836, but couldn't find it.
What I would like to know in particular is whether GPIO19 to GPIO21 pins are now available on BCM2836 or not. I didn't find any differences regarding the pin layout between BCM2835 and 2836.
Also, I observed in BCM2835 Peripheral documentation(P.102) (https://www.raspberrypi.org/wp-content/ ... herals.pdf
) that, GPIO19-GPIO21 can be configured as I2C/SPI slave.
But, there is no pin outs available for GPIO19 and 20 (http://elinux.org/RPi_BCM2835_GPIOs#GPIO20
Could you please guide me / clarify if RPi can act as SPI slave at hardware level ? Is there an alternative approach other than bit banging.
Note: Btw, the short description about the project goal is to simulate the Micro Controllers from PC. For this, Pi receives a TCP/IP packet from PC and the extracted data has to be sent to the MCs over SPI/CAN/UART. Also, Pi receives back the data packets from MCs and to be transferred over to PC. Finally, in our student project, we want to use Pi as COM-Gateway.
Thank you very much in advance.