#ARDUINO MEGA 2560 INTERRUPT PINS GENERATOR#

take a look at digital pin 38, (pin #50, (PD7) at the corner of the chip), it is only 1 pin away from the XCK1 pin ( #48 (PD5)). However, some of the functionality of theĬontrol registers changes when using MSPIM.'

The I/O register locations are the same in both modes. However, the pin control logic and interrupt generation logic is identical in The USART RX and TX control logic is replaced by a common SPI

#ARDUINO MEGA 2560 INTERRUPT PINS GENERATOR#

The parity generator and checker, the data and clock recovery logic, and the RX and TXĬontrol logic is disabled. Resources include the transmitter and receiver shift register and buffers, and the baud rate generator. The SPI master control logic takes direct control over the USART resources. Setting both UMSELn1:0 bits to one enables the USART in MSPIM logic.

LSB First or MSB First Data Transfer (Configurable Data Order).

Supports all four SPI Modes of Operation (Mode 0, 1, 2, and 3).

Full Duplex, Three-wire Synchronous Data Transfer.

The Master SPI Mode (MSPIM) has the following Set to a master SPI compliant mode of operation.

The Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) can be I don't know if there is a library for this. With a 2560, you can also use the USART as SPI, so you can have 2 SPI ports. You would connect the two displays in parallel to MISO-MOSI-SCK and send data to one or the other using separate slave select for each one. You can do things like add wires from the 50-51-52 (or 51-52-53) pins to other pins to access them, and treat the new pins as inputs only in the sketch so there is no interference. SPI comes from dedicated internal hardware, so it can't be re-assigned.

Arduino mega 2560 interrupt pins