manitou
Senior Member+

If signal generator was driving pin 22 at more than 3.3v, then maybe you fried pin 22 and other pins. You should be seeing only 3.3v on PWM output pins. :confused: you could try some pin tests, digitalRead()...

In the 2nd column, it says when using T4 pin 22 as input, then you can't use pin 23 for analogWrite(). So choose another PWM pin, e.g. pin 12, for the PWM test example. Teensy 4 pins are NOT 5 volt tolerant, so you...

actually, T4 pwm test should use pin 12 not pin 23 (see https://www.pjrc.com/teensy/td_libs_FreqMeasure.html ) ? if AC add blocking capacitor?

Do you have common ground between teensy and generator. Try this test with PWM (jumper pin 12 to pin 22) #include <FreqMeasure.h> void setup() { Serial.begin(57600); analogWriteFrequency(12,600); //jumper...

Ethernt MAC address Each Teensy 3* and Teensy 4* comes with a unique number set in the OTP efuses. The teensy core uses those bytes to define the Ethernet MAC and a USB serial number. Teensy 4 ...

I tried the Teensy 4.1 port with my T4.1 and home ethernet git clone --recursive https://github.com/mbed-ce/mbed-os-example-sockets.git in build/ cmake .. -GNinja...

So do TLS sockets work on the 1060 EVK and/or 1050 EVK? My earlier Ethernet testing on those EVK boards was using the lwIP library, and I only did standalone testing of the mbedTLS lib. CA certificates have an...

Pin tests on T4.0 with mbed CE: digital tests (D0 - D23): inpin.mode(PullUp) and then jumpering each pin to GND and confirming pin valuue 0 -- all ok PWM tests: only pin D22 worked with PWM (default 50 hz). all...

Re: Cortex M7 tests Over the years I've been using the mbed online compiler (RIP) for testing. Recently I've been using mbed cli and Keil Studio. I've also used NXP MCUxpresso with the SDK for the 1170...

you may need to add 2K pullup resistors on SCL/SDA to overcome the 10K pullups on each of the sensor PCBs -- I am NOT an EE :D

Yep, your recipe worked for me Hello world from Mbed CE! Hello world from Mbed CE! Hello World from inside usb_device_ehci.c, controllerId = 2 Hello world from Mbed CE! no USB tty device xhci_hcd...

My limited experience with RPI pico cmake, you could set both uart and usb to "true" in the json file, but that doesn't appear to work on mbed ce. My morse code output works on pin 13, but my "decoder" measuring...

600 mhz with -O3 also working ;) coremark 2K performance run parameters for coremark. CoreMark Size : 666 Total ticks : 1222 Total time (secs): 12.220000 Iterations/Sec : 2454.991817 Iterations ...

Thanks, target_compile_options worked, -O3 working now ;)

yes, i saw that and tried that. I've even tried hacking the git sources and changing all -Os to -O3 anywhere (e.g., .cmake and .json and ...), and trying things in other forums ... no luck. I have done optimization...

Great news on 600 MHz. Paul's core has set_arm_clock(frequency) in clockspeed.c that allows you to configure clock speed from IDE or under program control. There are threads on this forum discussing heat sinks for...

> target_compile_options(HelloWorld PRIVATE -O3) I added this to CMakeLists.txt and recreated build/ but there was no change in performance from -Os. Any other suggestions?? thanks for tip on "mbed-baremetal" ...

I would like to run with -O3. It appears that it is running at -Os. -Os appears in CMakeCache.txt CMAKE_ASM_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG CMAKE_CXX_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG...

In cmake how do I change compiler optimization for builds? Would be nice to increase SystemCoreClock from 528 MHz to 600 MHz.

Some hardware registers for T4.0 under mbed os 6. SystemCoreClock 528000000 11:38:27 Feb 8 2023 ok ArmPllClk 1056000000 AhbClk 528000000 RtcClk 32768 Usb1PllPfd0Clk 664615368 IpgClk 132000000 SemClk 176000000 ...

Update, I used the following for mbed_app.json { "target_overrides": { "*": { "platform.stdio-baud-rate": 115200, "platform.stdio-buffered-serial": 1, ...

OK I updated mbed-ce-hello-world -- thanks Paul for the detailed git incantations. I built, loaded, and ran main.cpp. No mbed death flashing. ttyUSB0 showed up usb 1-3.4: new full-speed USB device number 37 using...

D12 (GPIO_B0_01) is on QTIMER 1 CHN 1 and does PWM with Teensy core, also see T4.0 pin map i'll do some UART testing shortly ...

updated mbed_app.json, removed build directory and re-created with cmake etc. my build summary has no mbed_usb.a Linking CXX executable HelloWorld.elf -- built:...

I deleted lines from startup_MIMXRT1052.S and added blink logic to main.cpp #include "mbed.h" int main() { DigitalOut myled(LED1); int p = 1; while(true) { printf("Hello world from...

So have you actually run your HelloWorld project on a T4.0? maybe add the HellowWorld.hex to your git repository. I believe T4.0's are in stock at pjrc.com

Paul, have you examined mbed-os/targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MIMXRT1050/TARGET_TEENSY_4X/bootdata.c Above my pay grade ... Seems like the mbed T4.0 code is derived from the 1050. I did some...

Tried but failed. :confused: on Ubuntu 18.04.06 with stock arm-none-eabi-g++ version 6.3.1, cmake looked OK, and ninja built HelloWorld.hex ninja Linking CXX executable HelloWorld.elf -- built:...

An active antenna (with long cable) on the windowsill is probably best, adding distance between the GPS antenna and RF noise of the MCU and other devices.

Does your GPS have an external antenna with a good view of the sky? Satellite lock may be intermittent and PPS erratic without external antenna. Some discussion of GPS PPS and Teensy crystal drift and frequency...