37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
/* ESP32 Arduino CAN Receive Basic Demo
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* This example will receive messages on the CAN bus
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*
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* An external transceiver is required and should be connected
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* to the CAN_tx and CAN_rx gpio pins specified by CANInit. Be sure
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* to use a 3.3V compatable transceiver such as the SN65HVD23x
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*
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*/
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#include <Arduino.h>
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#include <ESP32CAN.h>
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void setup() {
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Serial.begin(115200);
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Serial.println("ESP32-Arduino-CAN Receive Basic Demo");
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/* initialize and start, use pin 5 as CAN_tx and pin 4 as CAN_rx, CAN bus is set to 500kbps */
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ESP32Can.CANInit(GPIO_NUM_5, GPIO_NUM_4, ESP32CAN_SPEED_500KBPS);
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}
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void loop() {
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twai_message_t rx_frame;
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if (ESP32CAN_OK == ESP32Can.CANReadFrame(&rx_frame)) { /* only print when CAN message is received*/
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Serial.print(rx_frame.identifier, HEX); /* print the CAN ID*/
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Serial.print(" ");
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Serial.print(rx_frame.data_length_code); /* print number of bytes in data frame*/
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for (int i=0; i<rx_frame.data_length_code; i++) { /* print the data frame*/
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Serial.print(rx_frame.data[i], HEX);
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}
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Serial.println();
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}
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delay(1000);
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}
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