lmoskala/ESP32_Arduino_CAN
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This commit is contained in:
Sam Perry 2022-12-23 17:43:53 -05:00
parent 32bf5abf99
commit b643a09188
2 changed files with 30 additions and 8 deletions
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18
examples/esp32can_receive/esp32can_receive.ino
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@ -1,3 +1,12 @@
/* ESP32 Arduino CAN Receive Basic Demo
* This example will receive messages on the CAN bus
*
* An external transceiver is required and should be connected
* to the CAN_tx and CAN_rx gpio pins specified by CANInit. Be sure
* to use a 3.3V compatable transceiver such as the SN65HVD23x
*
*/
#include <Arduino.h>
#include <ESP32CAN.h>
@ -5,18 +14,19 @@ void setup() {
Serial.begin(115200);
Serial.println("ESP32-Arduino-CAN Receive Basic Demo");
/* initialize and start, use pin 5 as CAN_tx and pin 4 as CAN_rx, CAN bus is set to 500kbps */
ESP32Can.CANInit(GPIO_NUM_5, GPIO_NUM_4, ESP32CAN_SPEED_500KBPS);
}
void loop() {
twai_message_t rx_frame;
if (ESP32CAN_OK == ESP32Can.CANReadFrame(&rx_frame)) { /* CAN message received*/
Serial.print(rx_frame.identifier, HEX);
if (ESP32CAN_OK == ESP32Can.CANReadFrame(&rx_frame)) { /* only print when CAN message is received*/
Serial.print(rx_frame.identifier, HEX); /* print the CAN ID*/
Serial.print(" ");
Serial.print(rx_frame.data_length_code);
Serial.print(rx_frame.data_length_code); /* print number of bytes in data frame*/
for (int i=0; i<rx_frame.data_length_code; i++) {
for (int i=0; i<rx_frame.data_length_code; i++) { /* print the data frame*/
Serial.print(rx_frame.data[i], HEX);
}