Canbus open your mind part 4

CANBus Development Kit Overview

Parts

Seeed CANBed Dual Dev Kit Ver 1.1
Atmega32U4 chip with 18 pins including digital, analog, UART, and I2C interfaces
MCP2515 CAN Bus controller with SPI interface
MCP2551 for CAN-Bus capability
Two types of CAN Bus interfaces: sub-D9 connector and terminal block interface

Steps

1. Download Arduino files from [Longan CAN MCP2515 GitHub](https://github.com/Longan-Labs/Longan_CAN_MCP2515) 2. Add the Longan RP2040 boards via the Arduino IDE

Notes

The device appears in lsusb but requires re-flashing.
Found a trial program (CanEasy) and an inexpensive CAN device for practical use.

RP2040 Features

Summary

The RP2040 from Raspberry Pi offers high performance, ease of use, and low cost. It supports MicroPython and C++ programming.

Key Points

Dual ARM Cortex-M0+ @ 133MHz
264kB on-chip SRAM in six independent banks
Support for up to 16MB of off-chip Flash memory via dedicated QSPI bus
DMA controller & Fully-connected AHB crossbar
Interpolator and integer divider peripherals
On-chip programmable LDO to generate core voltage
2 on-chip PLLs to generate USB and core clocks
30 GPIO pins, 4 of which can be used as analogue inputs
Peripherals: 2 UARTs, 2 SPI Controllers, 2 I2C Controllers, 16 PWM, USB 1.1 Controller and PHY (Host & Device), 8 PIO State Machines

Programmable I/O (PIO) Subsystem

Provides additional computing power and flexibility
Uses simple state machines to supplement the computing capabilities of the main CPU
Delegates simple but resource-intensive tasks to state machines, freeing up CPU resources

Programming with Arduino IDE

Install RP2040 boards via the Arduino IDE using the following URL:

``` https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json ```

Python Programming

Use simple Python for coding
Install Thonny editor on Linux for Python development

Problem

The unit was unable to move to the next level and required re-flashing.

Solution

Use CanEasy trial program and an inexpensive CAN device for practical use.
Download and install the necessary Arduino files and add the Longan RP2040 boards via the Arduino IDE.