CAN.readMsgBuf()

[CANBus]

描述

Function to read data from the CAN bus. (This function is created referencing the CAN bus library from Seeed Studio, Depending on your preferences, you can use this function to read data instead of the requestFrom() and read() function.)
Note: This function is used in conjunction with the checkReceive() function.

語法

CAN.readMsgBuf(&len, buf)

參數

• len: Length of data in the buffer (number of byte), an unsigned char variable.
• buf: Received data (character array)

回傳

• CAN_OK: Data is read
• CAN_NOMSG: Did not read any data

範例

#include <CANBus.h>
unsigned char len = 0;
unsigned char buf[8];
 
void setup() {
    Serial.begin(115200);
    CAN.begin(CAN_500KBPS);
}
 
void loop() {
    if(CAN_MSGAVAIL == CAN.checkReceive())            // Check to see whether data is read
    {
        CAN.readMsgBuf(&len, buf);    // Read data
 
        for(int i = 0; i<len; i++)    // Output data value
        {
            Serial.print(buf[i]);
            Serial.print("\t");
        }
        Serial.println();
    }
}

參考

• init_Filt()
• init_Mask()
• checkReceive()

函式庫參考主頁面

86Duino 參考的文本是根據 Creative Commons Attribution-ShareAlike 3.0 License，部分文本是從 the Arduino reference 修改的。 參考中的代碼示例已發佈到公共領域。