[CANBus]
Desription
Check CAN bus’ FIFO buffer to see whether there are data to read.（This function is created referencing the CAN Bus library from Seeed Studio. Note: This function must be used with the readMsgBuf() function.
語法
CAN.checkReceive(void)
參數
None
回傳
CAN_MSGAVAIL: Indicates there are data in FIFO buffer to be read.CAN_NOMSG: Indicates there is no data in the FIFO buffer.
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 received.
{
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
函式庫參考主頁面
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