Arduino DLK_MCP2515 Library

Arduino library for available MCP2515 standalone CAN controller modules.

MCP2515 Module Schematic

DLK_MCP2515(spi_speed, cs_pin, hw_cs_pin = false, which_spi = SPI0_NUM);

SPIs	Ints	SW_CS	HW_CS
2	4	many	2 (1-each SPI port, Pi Pico only)

AVR Nano

• 1 SPI port with SW CS only
• 2 INT interrupt pins

Scenarios:

• up to 2 SPI devices with interrupts (limited by INT pins)
• many SPI devices without interrupts (limited by GPIO pins for SW CS)

AVR Nano Every

• 1 SPI port with SW CS only
• many GPIO interrupt pins

Scenarios:

• up to 4 SPI devices with interrupts (total limited by DLK_MCP2515 Library)
• many SPI devices without interrupts (limited by GPIO pins for SW CS)

Pi Pico

• 2 SPI ports optionally supporting HW CS or SW CS
• many GPIO interrupt pins

Scenarios:

SPI0:

• up to 4 SPI devices with interrupts (total limited by DLK_MCP2515 Library)
• 1 SPI device only with HW CS
• many SPI devices without interrupts (limited by GPIO pins for SW CS)

SPI1:

• up to 4 SPI devices with interrupts (total limited by DLK_MCP2515 Library)
• 1 SPI device only with HW CS
• many SPI devices without interrupts (limited by GPIO pins for SW CS)

Teensy 3.1

• 1 SPI port with SW CS only
• many GPIO interrupt pins

Scenarios:

• up to 4 SPI devices with interrupts (total limited by DLK_MCP2515 Library)
• many SPI devices without interrupts (limited by GPIO pins for SW CS)

ESP8266

• 1 SPI port with SW CS only
• NO GPIO interrupt pins

Scenarios:

• No SPI devices with interrupts
• 1 SPI device without interrupts (limited by GPIO pins for SW CS)

ESP32

• 2 SPI ports with SW CS only
• NO GPIO interrupt pins

Scenarios:

• No SPI devices with interrupts
• many SPI devices without interrupts (limited by GPIO pins for SW CS)