MCP2515 CAN Bus Module Board TJA1050 Receiver SPI for 51 MCU Arm Controller
The MCP2515 CAN Bus Module Board is a popular and widely used component in IoT and automotive applications. It is aMicrochip MCP2515 CAN controller with a TJA1050 CAN transceiver, allowing for high-speed (up to 1Mb/s) communication over the CAN bus. The module uses SPI (Serial Peripheral Interface) communication protocol to interact with microcontrollers.
Microchip MCP2515 CAN controller
TJA1050 CAN transceiver
SPI communication interface
5V operating voltage
Compatible with 51 MCU Arm controllers
The MCP2515 CAN Bus Module Board can be controlled using SPI commands. The module operates in three modes: Normal Mode, Sleep Mode, and Configuration Mode.
`0x00`: Read RX Buffer (RX FIFO)
`0x01`: Read Status Register
`0x02`: Write TX Buffer (TX FIFO)
`0x03`: Write Control Register
`0x04`: Write Status Register
`0x05`: Read Bypass Register
`0x06`: Write Bypass Register
`0x07`: Read Mode Register
`0x08`: Write Mode Register
### Example 1: Basic SPI Communication using Arduino
This example demonstrates basic SPI communication between an Arduino board and the MCP2515 CAN Bus Module Board.
```cpp
#include <SPI.h>
#define MCP2515_CS 10 // Define the Chip Select pin for the MCP2515
void setup() {
SPI.begin(); // Initialize SPI
pinMode(MCP2515_CS, OUTPUT); // Set Chip Select as output
}
void loop() {
digitalWrite(MCP2515_CS, LOW); // Select the MCP2515
SPI.transfer(0x00); // Send command to read RX Buffer
uint8_t rxData = SPI.transfer(0x00); // Read RX Buffer
digitalWrite(MCP2515_CS, HIGH); // Deselect the MCP2515
Serial.print("Received Data: ");
Serial.println(rxData, HEX);
delay(1000);
}
```
### Example 2: Sending a CAN Message using a 51 MCU Arm Controller (Keil Vision)
This example demonstrates how to send a CAN message using a 51 MCU Arm controller.
```c
#include <mcp2515.h>
#define MCP2515_CS P1.0 // Define the Chip Select pin for the MCP2515
#define CAN_ID 0x101 // Define the CAN ID for the message
#define CAN_DATA 0x12 0x34 0x56 0x78 // Define the CAN data bytes
void main() {
MCP2515_Init(MCP2515_CS); // Initialize the MCP2515
MCP2515_SetMode(MODE_NORMAL); // Set the MCP2515 to Normal Mode
// Create a CAN message structure
CAN_Msg msg;
msg.id = CAN_ID;
msg.header.rtr = 0; // Data frame
msg.header.ext = 0; // Standard ID
msg.data[0] = CAN_DATA;
// Send the CAN message
MCP2515_SendMsg(MCP2515_CS, &msg);
while(1) {}
}
```
### Example 3: Receiving a CAN Message using a 51 MCU Arm Controller (Keil Vision)
This example demonstrates how to receive a CAN message using a 51 MCU Arm controller.
```c
#include <mcp2515.h>
#define MCP2515_CS P1.0 // Define the Chip Select pin for the MCP2515
void main() {
MCP2515_Init(MCP2515_CS); // Initialize the MCP2515
MCP2515_SetMode(MODE_NORMAL); // Set the MCP2515 to Normal Mode
while(1) {
// Check if a message is available in the RX Buffer
if (MCP2515_GetStatus(MCP2515_CS) & MCP2515_STATUS_RX.BufferFull) {
CAN_Msg msg;
MCP2515_ReceiveMsg(MCP2515_CS, &msg); // Receive the CAN message
// Process the received CAN message
printf("Received CAN ID: 0x%X
", msg.id);
printf("Received CAN Data: ");
for (uint8_t i = 0; i < 8; i++) {
printf("0x%X ", msg.data[i]);
}
printf("
");
}
}
}
```
Note: The code examples provided are for illustrative purposes only and may require modifications to work with your specific setup and requirements.
