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The "isotp_example_send_receive.ino" calls: line 36: Can1.setClock(CLK_60MHz); I'm confused; this function is private. What am I missing? Update: I see it is only private within: FlexCAN_T4FD

Ah, good point. I hadn't thought that through.

Sounds good. I was able to get the SimpleFTPServer working well with QNEthernet and meets my needs. The following is just to document what I did in case someone else wants to try it. For some reason uploads are limited to approximately 10MB/s, and downloads 8MB/s. Maybe due to the old...

Thanks shawn. I'll look into just modifying the SimpleFTPServer code and using QNEthernet as-is.

I modified the setup files for SimpleFTPServer to work with QNEthernet, and SdExFat/ExFile. However, when downloading files, I rarely got the whole file unless the file was very small. My solution was to replace the call to file.write( buf, nb ) in bool FtpServer::doRetrieve() to...

Problem resolved. I decided to shotgun the problem and just start removing components. The issue was caused by one of the daughter boards in my system. So while I don’t know the root cause yet, I plan to leave the offending board unplugged and work on higher priority parts of the system...

I connected a thicker ground wire to the ground between 3.3v and 5V, then to the first ground pin on the other side, then to the another ground, one at a time with no success. Installed a new Teensy 4.1, with the same result. Measure the resistance between SCL and its pull-up and then SDA to...

maybe “start up” wasn’t the right word. The issue happens at the start of every one second loop. Another thing I noticed is that SDA looks fine, only SCL has the ramping issue, as shown below:

I'm using 2K pull up resistors. This simplified code exhibits the same issue, though I'm not sure it's the code (though I've been wrong before): #include <Arduino.h> #include <i2c_device.h> enum class Switch_Digital : uint16_t { Address = 0x0023, SWITCH_BATT_ENABLE_0 = 0x0001...

I’m having communication errors with the first I transmission. If I immediately send the same message again it is fine. I noticed that the signal isn’t pulled down properly at first. Here is a screenshot: I’ve checked for grounding issues, and even added additional grounding with no change...

EDIT: SPI communication is working. There may be somthing else going on non-teensy related. The warnings below sent me down the rabbit hole. SPI communication stopped working on my project, even after I reverted the code back to a known working version. I'm still troubleshooting the...

Thanks Kurt, I'll look into it. Right now I'm generating a PWM on one timer, and reading the duty cycle on 4 independant freqencies on the 4 other pins as follows: Wheelspeed : FTM3 pin2 Input frequency 1: pin5 Input frequency 2: pin6 Input frequency 3: pin22 Input frequency 4: pin23...

Could someone tell me how many PWM timers the Teensy 4.0 has and the respective pins? I'm looking for something like this that I got from the PWM and Tone link for the Teensy 3.6: FTM0 5, 6, 9, 10, 20, 21, 22, 23 488.28 Hz FTM1 3, 4 488.28 Hz FTM2 29, 30 488.28 Hz FTM3 2, 7, 8, 14, 35...