CAN.beginTransmission()

[CANBus]

説明

Initialize transmission state.
Note: Usage for this function is similar to the beginTransmission() function for Wire. Immediately after calling this function, the write() と endTransmission() functions must be called to complete the transmission task.

Syntax

CAN.beginTransmission(id)
CAN.beginTransmission(id, ext)

Parameters

• id: External CAN device ID
• ext: Data transmission format. This parameter is not needed for the function to work. When not set, the default, CAN_STDID, is used.
  • CAN_STDID: Standard data frame, comply with CAN 2.0A standard. ID range: 0 ~ 0x7FF
  • CAN_EXTID: Extended data frame, based on CAN 2.0B standard. ID range: 0 ~ 0x1FFFFFFF
  • CAN_STDID_REMOTE: Standard data frame, comply with CAN 2.0A standard. ID range: 0 ~ 0x7FF
  • CAN_EXTID_REMOTE: Extended data frame, comply with CAN 2.0B standard. ID range: 0 ~ 0x1FFFFFF

Returns

None

事例

#include <CANBus.h>
unsigned char buf[8] = {0, 1, 2, 3, 4, 5, 6, 7};
 
void setup() {
    Serial.begin(115200);
    CAN.begin(CAN_500KBPS); // Configure CAN bus transmission speed to 500KBPS
}
 
void loop() {
    CAN.beginTransmission(0x00);               // Set the CAN device ID to 0x00, using standard data grame.
    CAN.write(buf, 8);                         // Sent 8 bytes of data
    CAN.endTransmission();                     // End transmission
    delay(10);
}

See also

• write()
• endTransmission()

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