Tinyu-Zhao
commented
1 month ago Can you provide your program, this will help me locate the problem better.
Open sonic74 opened 1 month ago
Tinyu-Zhao
commented
1 month ago Can you provide your program, this will help me locate the problem better.
sonic74
commented
1 month ago This is not my program, but yours: In the Arduino IDE just go to the menu File/Examples/M5Atom/ATOM_BASE/ATOM_CAN and try to build it for M5AtomS3
sonic74
commented
1 month ago Might be a good idea to link to https://github.com/m5stack/M5AtomS3/tree/main/examples/Unit/MiniCAN_TJA1051T on the website. And also correct the table https://static-cdn.m5stack.com/resource/docs/products/atom/Atomic%20CAN%20Base/pinMap-34359801-b635-49e7-8b00-61bf09e7b4d1.png "ATOM LITE" is two times in there and AtomS3Lite is missing.
Tinyu-Zhao
commented
2 weeks ago You can try this example
#include <M5AtomS3.h>
#include "driver/twai.h"
// Pins used to connect to CAN bus transceiver:
#define RX_PIN 6
#define TX_PIN 5
// Interval:
#define TRANSMIT_RATE_MS 1000
#define POLLING_RATE_MS 1000
#define ARDUINO_USB_CDC_ON_BOOT 1
static bool driver_installed = false;
unsigned long previousMillis = 0; // will store last time a message was send
void setup() {
auto cfg = M5.config();
AtomS3.begin(cfg);
// Initialize configuration structures using macro initializers
twai_general_config_t g_config = TWAI_GENERAL_CONFIG_DEFAULT(
(gpio_num_t)TX_PIN, (gpio_num_t)RX_PIN, TWAI_MODE_NORMAL);
twai_timing_config_t t_config =
TWAI_TIMING_CONFIG_500KBITS(); // Look in the api-reference for other
// speed sets.
twai_filter_config_t f_config = TWAI_FILTER_CONFIG_ACCEPT_ALL();
// Install TWAI driver
if (twai_driver_install(&g_config, &t_config, &f_config) == ESP_OK) {
Serial.println("Driver installed");
} else {
Serial.println("Failed to install driver");
return;
}
// Start TWAI driver
if (twai_start() == ESP_OK) {
Serial.println("Driver started");
} else {
Serial.println("Failed to start driver");
return;
}
// Reconfigure alerts to detect TX alerts and Bus-Off errors
uint32_t alerts_to_enable = TWAI_ALERT_TX_IDLE | TWAI_ALERT_TX_SUCCESS |
TWAI_ALERT_TX_FAILED | TWAI_ALERT_ERR_PASS |
TWAI_ALERT_BUS_ERROR;
if (twai_reconfigure_alerts(alerts_to_enable, NULL) == ESP_OK) {
Serial.println("CAN Alerts reconfigured");
} else {
Serial.println("Failed to reconfigure alerts");
return;
}
// TWAI driver is now successfully installed and started
driver_installed = true;
}
static void send_message() {
// Send message
// Configure message to transmit
twai_message_t message;
message.identifier = 0x0F6;
message.data_length_code = 4;
for (int i = 0; i < 4; i++) {
message.data[i] = 0;
}
// Queue message for transmission
if (twai_transmit(&message, pdMS_TO_TICKS(1000)) == ESP_OK) {
printf("Message queued for transmission\n");
} else {
printf("Failed to queue message for transmission\n");
}
}
void loop() {
if (!driver_installed) {
delay(1000);
return;
}
uint32_t alerts_triggered;
twai_read_alerts(&alerts_triggered, pdMS_TO_TICKS(POLLING_RATE_MS));
twai_status_info_t twaistatus;
twai_get_status_info(&twaistatus);
if (alerts_triggered & TWAI_ALERT_ERR_PASS) {
Serial.println("Alert: TWAI controller has become error passive.");
}
if (alerts_triggered & TWAI_ALERT_BUS_ERROR) {
Serial.println(
"Alert: A (Bit, Stuff, CRC, Form, ACK) error has occurred on the "
"bus.");
Serial.printf("Bus error count: %lu\n", twaistatus.bus_error_count);
}
if (alerts_triggered & TWAI_ALERT_TX_FAILED) {
Serial.println("Alert: The Transmission failed.");
Serial.printf("TX buffered: %lu\t", twaistatus.msgs_to_tx);
Serial.printf("TX error: %lu\t", twaistatus.tx_error_counter);
Serial.printf("TX failed: %lu\n", twaistatus.tx_failed_count);
}
if (alerts_triggered & TWAI_ALERT_TX_SUCCESS) {
Serial.println("Alert: The Transmission was successful.");
Serial.printf("TX buffered: %lu\t", twaistatus.msgs_to_tx);
}
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= TRANSMIT_RATE_MS) {
previousMillis = currentMillis;
send_message();
}
}
This repo is linked on https://docs.m5stack.com/en/atom/Atomic%20CAN%20Base which also has pin definitions for M5AtomS3 which implies that the ATOM_CAN example should work for M5AtomS3, but already building fails: