Search found 148 matches

by ESP_Dazz
Tue Oct 08, 2019 6:34 am
Forum: ESP32 Arduino
Topic: Using the official CAN driver with Arduino
Replies: 7
Views: 568

Re: Using the official CAN driver with Arduino

dmaxben wrote: Ive tried a bunch of different things, but cant get it to compile
Could explain what steps you have taken to port the driver over to Arduino, and also the compilation error log you are seeing.
by ESP_Dazz
Tue Oct 08, 2019 6:33 am
Forum: ESP32 IDF
Topic: portENTER_CRITICAL explaination
Replies: 1
Views: 262

Re: portENTER_CRITICAL explaination

The mux used in portENTER_CRITICAL is actually a spinlock. A spinlock is required in order to prevent multiple CPUs from accessing the same resource concurrently (e.g. a variable, struct, or set of registers). You can use a mutex spinlock as follows: #include <stdio.h> static portMUX_TYPE my_mutex; ...
by ESP_Dazz
Thu Sep 26, 2019 9:09 am
Forum: General Discussion
Topic: ESP_LOG giving a panic error
Replies: 7
Views: 381

Re: ESP_LOG giving a panic error

Code: Select all

xTaskCreate(&blink_task, "blink_task", configMINIMAL_STACK_SIZE, NULL, 1, NULL);
Try increasing your stack size (e.g. 4096).
by ESP_Dazz
Thu Sep 26, 2019 7:05 am
Forum: General Discussion
Topic: freeRTOS / Default Events/Tasks Clarification please....
Replies: 9
Views: 502

Re: freeRTOS / Default Events/Tasks Clarification please....

Can someone give me a point in the right direction on the documentation that explains how and where the initial default tasks are being started -- and the where the scheduler is being started in a default sample project? An application's entry point is the app_main() function which is run from a ma...
by ESP_Dazz
Thu Sep 19, 2019 4:01 pm
Forum: ESP32 IDF
Topic: Timer divider and frequency
Replies: 5
Views: 496

Re: Timer divider and frequency

Does it mean I can have the timer ticking at 40MHz? Yep, just set the divider to 2 Except 0 (obviously), but also 1. Why can it not be 1? Because of the division operation or some other cost involved in prescaling the clock? It's a hardware limitation. A Timer's internal logic operates according to...
by ESP_Dazz
Mon Sep 16, 2019 11:58 am
Forum: General Discussion
Topic: make: *** No rule to make target '//Makefile'. Stop.
Replies: 1
Views: 166

Re: make: *** No rule to make target '//Makefile'. Stop.

Please check if you have properly defined your IOT_SOLUTION_PATH via the following command:

Code: Select all

printenv IOT_SOLUTION_PATH
If not, please set your IOT_SOLUTION_PATH according to the instructions stated here.
by ESP_Dazz
Thu Sep 12, 2019 2:27 pm
Forum: ESP32 Arduino
Topic: Software Timer using xTimerCreate runs 33% slow
Replies: 1
Views: 446

Re: Software Timer using xTimerCreate runs 33% slow

Some points to consider How are you actually measuring the duration of your timer? The timer doesn't start until xTimerStart() returns, and xTimerStart() has a possibility of being blocked if the timer's internal command queue is full. The timer callback could be delayed in running if there is some...
by ESP_Dazz
Thu Sep 12, 2019 1:45 pm
Forum: ESP32 IDF
Topic: Timer divider and frequency
Replies: 5
Views: 496

Re: Timer divider and frequency

An 80MHz APB Clock is fed into the entire Timer Group. Each timer then takes 80MHz APB clock and divides it down via the prescaler to a frequency of their own liking. How much the 80MHz clock is divided down by is determined by the value set in the prescaler (i.e. the Divider). The divider can take ...
by ESP_Dazz
Fri Sep 06, 2019 12:30 pm
Forum: General Discussion
Topic: RTOS running on one core only
Replies: 32
Views: 4809

Re: RTOS running on one core only

Ok I have also have an issue where my esp32 from DO-IT using NODEMCU-12E board in boards manager doesnt accept rtos and throws error in arduino i am so frustrated by this especially because i specially ordered these because of the rtos and dual core capability.Can any one of u please tell me how to...
by ESP_Dazz
Wed Aug 28, 2019 8:07 am
Forum: Hardware
Topic: ADC VRef calibration eFuse
Replies: 3
Views: 651

Re: ADC VRef calibration eFuse

Is there an easy way to override the fuse value when calling esp_adc_cal_characterize? No matter what I supply for the VREF param it always gets set to 1100 because the fuse takes priority. In esp-idf, the simplest way is to modify the esp_adc_cal_characterize() function directly as such: //Check e...

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