FlexCan for Teensy 4.1 - Githubissues

ldevillez commented 3 years ago

Hello do you know it the library works for a Teensy 4.1 ?

I used the demo code:

#include <FlexCAN_T4.h>
FlexCAN_T4<CAN3, RX_SIZE_256, TX_SIZE_16> Can0;

void setup(void) {
  Serial.begin(115200); delay(400);
  pinMode(6, OUTPUT); digitalWrite(6, LOW); /* optional tranceiver enable pin */
  Can0.begin();
  Can0.setBaudRate(50000);
  Can0.setMaxMB(16);
  Can0.enableFIFO();
  Can0.enableFIFOInterrupt();
  Can0.onReceive(canSniff);
  Can0.mailboxStatus();
}

void canSniff(const CAN_message_t &msg) {
  Serial.print("MB "); Serial.print(msg.mb);
  Serial.print("  OVERRUN: "); Serial.print(msg.flags.overrun);
  Serial.print("  LEN: "); Serial.print(msg.len);
  Serial.print(" EXT: "); Serial.print(msg.flags.extended);
  Serial.print(" TS: "); Serial.print(msg.timestamp);
  Serial.print(" ID: "); Serial.print(msg.id, HEX);
  Serial.print(" Buffer: ");
  for ( uint8_t i = 0; i < msg.len; i++ ) {
    Serial.print(msg.buf[i], HEX); Serial.print(" ");
  } Serial.println();
}

void loop() {
  Can0.events();

}

The preview of my can: screenshot_20210404_124451

The blue output is connected to pin 30 (CRX3). I checked to have the same frequency on my can network.

Thanks in advance :)

tonton81 commented 3 years ago

yes 4.0 & 4.1 are working, what problem are you having? i see you have a baudrate of 50kbps, is that correct or typo for 500kbps?

ldevillez commented 3 years ago

Okay thanks for your answer :)

ldevillez commented 3 years ago

yes 4.0 & 4.1 are working, what problem are you having? i see you have a baudrate of 50kbps, is that correct or typo for 500kbps?

I'm trying to use my computer to send a can packet (mainly standframe). For that i use a cheap usb-can translator (https://github.com/alexmohr/usb-can) then with can-utils i send a packet (red line on my screen is the CAN_L).

Then i used a SN65HVD230 as a can tansceiver. The Rx pin of this IC is then connected to the CRX of the T4.1 (I've tried the 3 controllers and I tried with another teensy).

So for now, I just try to print the receive can packet from the teensy.

I used a baudrate of 50 kbps because it was easier for my scope (i configured my adaptor to works at this baudrate). I just tested with a baudrate of 500 kbps and i got also no result.

The test message that i use: "123#AABBCCDD"

msadie commented 3 years ago

Can you confirm you have the CTX pin of teensy connected to Tx of transceiver? This is required for receiving node to ack the message. Also, be sure the Rs pin of transceiver is strongly pulled to ground.

On Sun, Apr 4, 2021, 11:12 AM Devillez Louis @.***> wrote:

yes 4.0 & 4.1 are working, what problem are you having? i see you have a baudrate of 50kbps, is that correct or typo for 500kbps?

I'm trying to use my computer to send a can packet (mainly standframe). For that i use a cheap usb-can translator ( https://github.com/alexmohr/usb-can) then with can-utils i send a packet (red line on my screen is the CAN_L).

Then i used a SN65HVD230 as a can tansceiver. The Rx pin of this IC is then connected to the CRX of the T4.1 (I've tried the 3 controllers and I tried with another teensy).

So for now, I just try to print the receive can packet from the teensy.

I used a baudrate of 50 kbps because it was easier for my scope (i configured my adaptor to works at this baudrate). I just tested with a baudrate of 500 kbps and i got also no result.

The test message that i use: "123#AABBCCDD"

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ldevillez commented 3 years ago

Thank you !! It was a bad solder joint of the Tx pin of the transceiver. I should have checked my joint :)