:floppy_disk: `107-Arduino-MCP2515`
===================================
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Arduino library for controlling the MCP2515 in order to receive/transmit CAN frames. This library is prepared to interface easily with [libcanard](https://github.com/OpenCyphal/libcanard) for using [Cyphal](https://opencyphal.org/) on Arduino via [107-Arduino-Cyphal](https://github.com/107-systems/107-Arduino-Cyphal).
This library works for
* [ArduinoCore-samd](https://github.com/arduino/ArduinoCore-samd): [`Arduino Zero`](https://store.arduino.cc/arduino-zero), [`MKR 1000`](https://store.arduino.cc/arduino-mkr1000-wifi), [`MKR WiFi 1010`](https://store.arduino.cc/arduino-mkr-wifi-1010), [`Nano 33 IoT`](https://store.arduino.cc/arduino-nano-33-iot), [`MKR GSM 1400`](https://store.arduino.cc/arduino-mkr-gsm-1400-1415), [`MKR NB 1500`](https://store.arduino.cc/arduino-mkr-nb-1500-1413), [`MKR WAN 1300/1310`](https://store.arduino.cc/mkr-wan-1310) :heavy_check_mark:
* [ArduinoCore-mbed](https://github.com/arduino/ArduinoCore-mbed): [`Portenta H7`](https://store.arduino.cc/portenta-h7), [`Nano 33 BLE`](https://store.arduino.cc/arduino-nano-33-ble), [`Nano RP2040 Connect`](https://store.arduino.cc/nano-rp2040-connect), [`Edge Control`](https://store.arduino.cc/edge-control) :heavy_check_mark:
* [arduino-esp32](https://github.com/espressif/arduino-esp32): `ESP32 Dev Module`, `ESP32 Wrover Module`, ... :heavy_check_mark:
* [arduino-pico](https://github.com/earlephilhower/arduino-pico): [`Raspberry Pi Pico`](https://www.raspberrypi.org/products/raspberry-pi-pico), `Adafruit Feather RP2040`, ... :heavy_check_mark:
* [ArduinoCore-renesas](https://github.com/arduino/ArduinoCore-renesas): [`Portenta C33`](https://store.arduino.cc/products/portenta-c33), [`Uno R4 WiFi`](https://store.arduino.cc/products/uno-r4-wifi), [`Uno R4 Minima`](https://store.arduino.cc/products/uno-r4-minima), ... :heavy_check_mark:
## Example
```C++
#include
#include <107-Arduino-MCP2515.h>
/* ... */
static int const MKRCAN_MCP2515_CS_PIN = 3;
static int const MKRCAN_MCP2515_INT_PIN = 7;
/* ... */
void onReceiveBufferFull(uint32_t const timestamp_us, uint32_t const id, uint8_t const * data, uint8_t const len)
{
Serial.println(id, HEX);
}
void onTransmitBufferEmpty(ArduinoMCP2515 * this_ptr)
{
/* You can use this callback to refill the transmit buffer via this_ptr->transmit(...) */
}
/* ... */
ArduinoMCP2515 mcp2515([](){ digitalWrite(MKRCAN_MCP2515_CS_PIN, LOW); },
[](){ digitalWrite(MKRCAN_MCP2515_CS_PIN, HIGH); },
[](uint8_t const d) -> uint8_t { return SPI.transfer(d); },
micros,
onReceiveBufferFull,
onTransmitBufferEmpty);
/* ... */
void setup()
{
Serial.begin(9600);
while(!Serial) { }
SPI.begin();
pinMode(MKRCAN_MCP2515_CS_PIN, OUTPUT);
digitalWrite(MKRCAN_MCP2515_CS_PIN, HIGH);
pinMode(MKRCAN_MCP2515_INT_PIN, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(MKRCAN_MCP2515_INT_PIN), [](){ mcp2515.onExternalEventHandler(); }, FALLING);
mcp2515.begin();
mcp2515.setBitRate(CanBitRate::BR_250kBPS_16MHZ); // CAN bitrate and clock speed of MCP2515
mcp2515.setNormalMode();
}
void loop()
{
uint8_t const data[8] = {0xDE, 0xAD, 0xBE, 0xEF, 0xDE, 0xAD, 0xBE, 0xEF};
mcp2515.transmit(1 /* id */, data, 8 /* len */);
delay(100);
}
```