CAN.readMsgBuf()

[CANBus]

説明

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.

構文

CAN.readMsgBuf(&len, buf)

媒介変数

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

戻り値

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

事例

#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();
    }
}

See also

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

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