You do not have the required permissions to view the files attached to this post. If I delete the statement. However, I've read that it’s best to avoid such high tick rates, due to the context switching delays. I have created a freertos task and I want it to repeat itself precisely every 2 seconds. Have just done the test on an ESP32 ESP32 DoIt ESP32 Devkit V1 (80MHz) I/O Speed Tests Over 50000 Iterations. I want to run the PID control source through FreeRTOS scheduling. } When this is the only task and the vTaskDelay () is commented, it runs. Compiled Using Arduino IDE v1. 3 posts • Page 1 of 1. It’s also one of the worst things. A suspicious death, an upscale spiritual retreat, and a quartet of suspects with a motive for murder. Is this approach the best or is there another way? vTaskDelay issue bit me. h >. If the. This page describes the vTaskDelay() FreeRTOS API function. c, which is set non-zero in vTaskSuspendAll() and. Both of the above threads mention that a delay of 1 ms should be enough, however I tried with 2 ms (vTaskDelay( 2 / portTICK_PERIOD_MS );), 3, 5, 7 ms and none worked ! With 10 ms delay, the issue does not appear AT THE MOMENT. FreeRTOS is a professional grade, small footprint, open source RTOS for microcontrollers. */ vToggleLED (); vTaskDelay ( xDelay ); } } FreeRTOS is an open source, small footprint RTOS for microcontrollers. The smallest delay you can pass to vTaskDelay () is 1 ms. For light sleep, that should occur when task is paused. For a value of 1 the system waits until the next timer tick occurs. Thus, all ESP-IDF applications and many ESP-IDF components are written based on FreeRTOS. One is to wait for a period after resetting a chip (BME280). この時間は設定で最低1msまでの調整が可能だった。. Hope this helps. One of the first solutions I thought about was to increase the tick rate to 10kHz and use vTaskDelay(1) to create the intervals, while giving the other tasks a chance to run. migmel (Miguel) July 10, 2023, 5:00am 7. My Tick Rate is 1024 Hz. This function differs from vTaskDelay () in one important aspect: vTaskDelay () specifies a time at which the task wishes to unblock relative to the time at. We have discovered something interesting, the gpio_set_level command followed by an immediate vTaskDelay does not seem to be effective until vTaskDelay as completed. One of the best things about Arduino is the ability to just block for a period with: delay (1000); // hang on a second, buddy. Posted by davedoors on August 20, 2013. The questions that arose. @Perehama and @gfvalvo I am using ESP32. I want to read analog signal via adc with sample rate about 48khz so when I read via adc and delay about 20us. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"examples","path":"examples","contentType":"directory"},{"name":"include","path":"include. Posted by heinbali01 on November 3, 2015. So, my question is, if I put a vTaskDelay (1) on my code. However, during enumeration some USB hosts require a (small) response every 100uS. c file, there is a define named IDLE_TASK_SIZE. This broke the real-time behaviour on my Arduino Mega because it now uses vTaskDelay() under the hood, and on the Arduino Mega, there is no real SysTick (here, the watchdog timeout with a resolution of 15 ms is used), what. I would like to know if the da14531 mod compiled with eclipse or with keil5 there is a method to generate small delays Es Delay(10); or vtaskdelay(10). So set configUSE TICK HOOK to 1 in FreeRTOSConfig. Regards,. This is just the demo tasks and not the kernel. Read part 1. I can't find a similar command anywhere. 1 Seconds = 1000000 Microseconds: 10 Seconds = 10000000 Microseconds: 2500 Seconds = 2500000000 Microseconds: 2 Seconds = 2000000 Microseconds: 20 Seconds = 20000000 Microseconds: 5000 Seconds = 5000000000 Microseconds: 3 Seconds = 3000000 Microseconds: 30 Seconds = 30000000 Microseconds: 10000 Seconds =. 100 microseconds interval. h","path. If the clock configuration is changed at runtime, then the function CyDelayFreq is used to indicate the new Bus. Understanding the vTaskDelay help. How to implement uS delay?Posted by at91kevin on June 1, 2009Hi all, Thanks for Open community. */ void delayMicroseconds (unsigned int us) { // calling avrlib's delay_us () function with low values (e. It should work when the scheduler is running, just ensure to set the priority down before you call vTaskStartScheduler (). 0×10-6 Seconds: 1000 Microseconds = 0. void vTaskDelay( portTickType xTicksToDelay );. ("MICROSECONDS","time in miliseconds=%lli",task_execution_start); // HERE BUNCH OF THINHS HAPPENING SUCH AS TOGGLING RELAYS, PRINTING VARIOUS STATES. ParametersCheck that the timer task isn't in a loop continuously calling vTaskDelay(0). The latest version of FreeRTOS came with the "tick". 4. I am having issues with time sensitive tasks. I would put some vTaskDelay(1000) inside each for() loop both into startTask1() and into startCheckTask1(). task. The ROM function ets_delay_us () (defined in rom/ets_sys. N. See vTaskDelayUntil() for an alternative API. all these are correct?. The delay will be variable depending on the temperature read from the printer head, and it vary around 1 millisecond. 1 or // 2 microseconds) gives delays longer than desired. A microsecond is equal to 1000 nanoseconds or 1⁄1,000 of a millisecond. Tell the scheduler to make it idle, or just delete the task: Code: Select all. Even a simple loop causes it to crash: ELF file SHA256: 0000000000000000 Backtrace: 0x4008860c:0x3ffbf8f0 0x40088889:0x3ffbf910 0x401300bc. For measuring time, there's xTaskGetTickCount, but this will be limited to the resolution of your tick rate. I have currently implemented a method which uses a counter. h header file, which declares the vTaskDelay function, and any header dependencies it has (which there aren’t many 1, 2) are satisfied. Therefore calling vTaskDelay (1) will block the calling task by 1ms. When you do delay (1000) your Arduino stops on that line for 1 second. vTaskSuspend(): This function is used to Suspend a task, the suspended remains in the same state util it is resumed. This would imply that your code is looping through this block many times without giving up focus. Both threads have the same priority. Parameters:vTaskDelay () specifies a time at which the task wishes to unblock relative to the time at which vTaskDelay () is called. cotestatnt October 20, 2022, 11:04am 1. We have 10 and 40 microseconds delay requirement for our application development purpose. Tickless microsecond delay before sleepPosted by cajjed on November 23, 2016I am using a samd21g18a and using the Atmel Software Framework with freeRTOS 9. When you call vTaskDelay (), your current initSystems () task is put into the blocked state, allowing the operating system to schedule another task. Hello community, I made a function that should be able to create a delay for a certain number of microseconds, here the code. I think you. Note down the value of xTickCount when the breakpoint set in step 3 is hit. Unless the delay is very many microseconds, you wouldn't be able to shift to another task, and even that would require something to generate an interrupt at the end to force the switch back. Turned out that vTaskDelay (2/portTICK_PERIOD_MS) wasn't waiting long enough. 2. 1 Description: delay () doesn't work for periods smaller than one tic. So, my question is, if I put a vTaskDelay (1) on my code. Posted by aturowski on April 9, 2009. I use the vDelayTask to let an LED blink with 1Hz in order to give feedback to the user that the code is running. The constant portTICK_RATE_MS can be used to calculate real time from the tick rate - with the resolution of one tick period. 2. ) to perform the delay. I have ensured that this is the only task with priority 1. Unless the delay is very many microseconds, you wouldn't be able to shift to another task, and even that would require. I checked it with oscilloscope. One big issue is that the cost to run the scheduler can easily be big enough on many processors that such a delay is impractical. FreeRTOS delay in microseconds. Timestamp of the nearest timer event, in microseconds. FreeRTOS does provide run time stack overflow protection, for task stacks at least, but it has to be turned on. vTaskDelay () is better for long or imprecise delays, because it lets another task wake up and run while the first task is suspended. Optimizing execution speed is a key element of software performance. If you select a value < portTICK_PERIOD_MS you may get a zero delay or you may get a delay of portTICK_PERIOD_MS (so 10mS). Top. The easiest way to track down which task (s) are calling SPI flash functions would be to add an assert (0); at the first line of spi_flash_op_block_func () and spi_flash_disable_interrupts_caches_and_other_cpu (). Whereas vTaskDelay specifies a wake time relative to the time at which the function is called, vTaskDelayUntil specifies the absolute (exact) time at which it wishes to unblock. The task above calculates how long the task took to execute and then performs vTaskDelay including the timestamp_difference. 2. vTaskDelay() does not therefore provide a good method of controlling the frequency of a periodic task as the path taken through the code, as well as other task and interrupt activity, will effect the frequency at which vTaskDelay() gets called and therefore the time at which the task next executes. Here is an example from a FreeRTOS+TCP driver: ~~~~ /* The task is created and. The code hangs somewhere in here. ESP32-IDFのFreeRTOSの初期設定では10msが1 Tickになるため、10ms単位での時間指定となる。. MorisZ_TIMEOUT_US (t) #include < zephyr/kernel. I made the function so it toggles a led. Inside the context switch interrupt the traceTASK SWITCHED OUT () macro will get called before another task is selected to enter the running state – placing. Thank you. 10 Milliseconds = 10000 Microseconds. This is bad practice and can cause your ESP32 to enter Kernel panic and force restart. I have pinned one task to each core with infinite loops. Hi i'm new to AVR assembly language so i was trying to get delay function to create 1 ms , 100us, and 1us delays to do that i need to figure out what to replace nop's with below here (mainboard arduino uno r3 ATmega328 Thank you. There are two easy solutions. La mejor forma de entender la diferencia es con un gráfico. It could go from about 800 microseconds to max 1. Basically I just want to run a task a given hertz (for example 50 Hz). I set the FreeRTOS tick rate to 250 in 'make. The ESP32 does not reset now. void loop() { vTaskDelay (portMAX_DELAY); //OR vTaskDelete ( NULL ); } As for the watchdog thing, the simplest option would be to try adding a yield () (aka vTaskYield ()) where necessary. A microsecond is a unit of time in the International System of Units (SI) equal to one millionth (0. For ESP-IDF, you can use this:ducalex commented Jul 11, 2019 •. Digital Pin Read Takes. Yet, something strange happens consistently at 35 minutes, 48 seconds. Multiply 0. {"payload":{"allShortcutsEnabled":false,"fileTree":{"main":{"items":[{"name":"component. If your application requires that you constantly. You really helped me out! But again, i have another question. What I saw is the before I complete the initialization of this toolkit the vTaskDelay function works. How can I do that with freertos or just what are the calculations (for delay). Also note it is better to specify times in milliseconds, rather than ticks, so you can change the tick frequency without effecting the timing (other than the resolution of the time). Note that timer precision is limited to the tick rate, not the requested value. Ive written some test-code to see how the FreeRTOS works. Porque vTaskDelay() es relativa: comienza a descontar el tiempo desde el momento en que es llamada, mientras que vTaskDelayUntil() es absoluta: descuenta el tiempo con respecto a un punto de referencia en el pasado. 1ms = SystemCoreClock / 1000. Delay a task for a given number of ticks. Stop thinking in microseconds, and think in "clock cycles" or "nanoseconds" instead. e. g. Difference between vTaskDelay and vTaskDelayUntil. One of the first solutions I thought about was to increase the tick rate to 10kHz and use vTaskDelay(1) to create the intervals, while giving the other tasks a chance to run. Single-family homes make up a large proportion of the market, but Greater Victoria also has a number of high-end luxury properties. av4625 May 22, 2020, 9:12am 3. The parameter in vTaskDelay is the delay period in number of ticks from now I'm totally new to programming and electronics, it would be very helpful if someone helped me figure this out. For example, if a developer were using FreeRTOS, within their task they could use code like the following: VTaskDelay(1);Describe the issue Since Release 10. Reply. 00001 and 0. The actual time that the task remains. MainTask runs only onces. 2. h, then write a function call vApplicationTickHook () that toggle the pin. Problem is, I cannot start them from outside before the time is over. zazas321 Posts: 187 Joined: Mon Feb 01, 2021 9:41 am. If you need to wait for something, wait on a semaphore/queue that will be. Why is Serial. When I call vTaskDelay(N), or I call ulTaskNotifyTake(true, N), N is a number of system ticks. Thanks! freertos; esp32; Share. I am programming an STM32F103 for my project and recently switched from bare-metal to RTOS (FreeRTOS to be specific) without using CubeMX (code attached below. Thannks! vTaskdelay (), vTaskdelayuntil () call doesn't work on MPC5748G. dc42 (David Crocker) June 22, 2020, 10:31am 1. vTaskDelay for 1uS, possible?Posted by willywortel on December 3, 2008First of all, thanks everyone for the response so far. The code runs very fast until it casues a stack overflow and resets the esp. For example, the serial output when its priority is set to 0 is:. Repeat from Step 1. Posted by glenenglish on May 26, 2017. In vTaskDelay you say how long after calling vTaskDelay you want to be woken . I have begun to interest in how FreeRTOS works, and because of I don't have my ESP32 yet, i decided to try it in my arduino micro. 0 and port files SourceportableRVDSARM_CM4F (imported via RTE Keil). Calling vTaskDelay(0) is equivalent to calling taskYIELD(). vTaskDelay is no good for small mS delays. I call vTaskDelay for various reasons. delay () is a blocking function. For ESP-IDF, you can use this: vTaskDelay () from ISR ? Hi Kiran, It is a custom not to create any delay from within an ISR. The FreeRTOS kernel is ported to all architectures (i. delayMicroseconds() works in arduino. Properly disconnecting from the MQTT Broker is nice, especially with out a Last Will and Testament and properly closing the network connection is an OK thing do. This is the second part of a series of ESP-IDF tutorials that I will complete as I learn stuff. Most of it is functions related to controlling a nextion screen via serial and stepper motors. See the configTICK_RATE_HZ configuration option. status code that indicates the execution status of the function. The TIMER_FREQUENCY I want to use is 5000Hz in order to buid a time length of 200 microseconds with a 1-bit resolution and 50% cyclacity (so duty = 1). Is there any limitation about max millis() counter? If millis() is used properly then no. Above is the setup for ADC, where we will use channel 1. The code works fine, but one thing puzzels me. . I. I want it to be 2 seconds regardless of. The constant portTICK_PERIOD_MS can be used to calculate real time from the tick rate - with the resolution of one tick period. eg. )Jan 3, 2021. settimeofday () returns 0, but when I try to get the time afterwards, it's still reporting 1970 epoch time 0. For your website. Removing the call woks fine. -> Added freertos component via PE -> Generated the code. Re: vTaskDelay () vS. Therefor, I read a lot, especally about xSemaphoreGiveFromISR which seems to be the most efficiant way to deal with this problem. It seems that sys tick handler blocks all interrupts and in result my timer does not work properly (I need microseconds precision). A tick is what you configure it to be. Here is an example from a FreeRTOS+TCP driver: ~~~~ /* The task is created and. Serial communication that appears. Shizen February 21, 2023, 1:53am 5. Since the frequency of AVR's watchdog oscillator is voltage- and temperature-dependent, it isn't a good idea to use vTaskDelay for precise timing intervals. vTaskDelay help. There are a thousand microseconds in a millisecond and a million microseconds in a second. So, guess I need to build a custom delay rather than using. 000001 or 10 −6 or 1⁄1,000,000) of a second. Thank you so much, okay i understood something. 下面我们用例子来分析一下,新建一个控制台应用程序,代码如下: 运行结果如下: 这里只能看到最终的运行结果,看不到执行过程。. In a more advanced system that is using a real-time operating system (RTOS), developers can leverage built in RTOS API calls for yielding a task to create a delay. Returns. I think you get the idea already, but if you have multiple tasks created, then vTaskDelay() will put the. The main caveat is that the argument has to be a compile-time constant. This causes serious random issues with my tick count (For example, vTaskDelay of a second will take microseconds). Next, let's look at an example showing the work and calculations that are involved in converting from microseconds to seconds (μs to s). Note this means a 1 tick delay will delay between 0. If you want something faster you would need to use a peripheral timer. delayMicroseconds() works in arduino. Most commonly, the time delay is introduced: At the beginning of the task, as the following example shows. Since my task takes approximately 0. Hi, it's me again with more stupid questions. It takes in a single parameter which is the stream where the data will be dumped. After much struggling I found that vTaskSuspendAll (); and xTaskResumeAll (); works but only as long as no delays are used. Top. Now I can use different vTaskDelay in the app_main function. The code below use channel 0. You really helped me out! But again, i have another question. This IR functionality needs a delay microseconds function in order to get built. 文章浏览阅读1. There are loads of other discussion you can find if you search for ‘microseconds’ on these forums if you want even more opinions…but I’ll chip in here with mine. The bug is only triggered if I activate another task, which initiates a client HTTP connection with a response timeout. #include <stdio. I’ve updated my delay library to support milliseconds and microseconds delays. I want to read analog signal via adc with sample rate about 48khz so when I read via adc and delay about 20us. ducalex commented on Jul 11, 2019 •. I have ensured that this is the only task with priority 1. 0. void vTaskDelay (const TickType_t xTicksToDelay) ¶ Delay a task for a given number of ticks. Re: vTaskDelay () vS. // Initializing the variable with the time BEFORE the count. Assumes a 8 or 16 MHz clock. In the SDK config I have enabled : 1. 0. ASSER_WARN with BT SPP (IDFGH. I have analyzed and understood the Scheduling method using Task. */ const TickType_t xDelay = 500 / portTICK_PERIOD_MS; for ( ;; ) { /* Simply toggle the LED every 500ms,. Microsecond delay within taskPosted by pugglewuggle on December 24, 2014Is there any method of doing this with FreeRTOS 8. First - You will need to make sure the tasks. ("MICROSECONDS","time in miliseconds=%lli",task_execution_start); // HERE BUNCH OF THINHS HAPPENING SUCH AS TOGGLING RELAYS, PRINTING VARIOUS STATES. If it is false then I wait 60 microseconds and then continue. How can I do that with freertos or just what are the calculations (for delay). eg. This function can be used by periodic tasks to ensure a constant execution frequency. B. void vTaskDelay( const TickType_t xTicksToDelay ); El tiempo que la tarea dormirá comienza a contar a partir del momento en que se hizo la llamada; por ello decimos que el tiempo es relativo . Understanding the vTaskDelay help. It is not persistent in so much as it runs in the context of the timer task (the time task has its own stack too, but you. so i. Up to 80 microseconds it is all good and stable, but if I raise the PWM frequency, below 80 µs the readings start to get unstable and unusable, the value starts jumping around and doesn't show a "real" value. Posted by davedoors on June 6, 2008. , Xtensa and RISC-V) available of ESP chips. At the moment, you seem stuck with an approach where you have to fight the RTOS. Let me know if anyone has any idea for that. To me it looks like it delays the treatment of the GPIO commands like they were pushed into a "queue" and only executed later on. The task may also be waiting for some resource, like a semaphore, to be released by another task. The constant portTICK_PERIOD_MS can be used to calculate real time from the tick rate - with the resolution of one tick period. vTaskDelay help Posted by tomirtos on October 15, 2014Hello Everyone! I’m probably missing something very obvious but I don’t understand that when I use the vTaskDelay function the delay is so short, no matter how large the number I put in the argument. The text was updated successfully, but these errors were encountered: All reactions. Actually, we have connected one module over UART with ESP32 chip in our product. This could change in future Arduino releases. h . I am trying to break down the fundamental features of freeRTOS (e. This could change in future Arduino releases. 5) . Have anybody a sample Project for PSoC4 and FreeRTOS I am wondering that is no Example availible?!yes, vTaskDelay also uses OSIF, so the root cause is still the same. Turned out that vTaskDelay (2/portTICK_PERIOD_MS) wasn't waiting long. The vTaskDelay never return when it is call after a blocking operation (e. Sorry for my poor description. h) will allow you to busy-wait for a correct number of microseconds. number of microseconds since underlying timer has been started . Task switching is performed because the FreeRTOS vTaskDelay is used. Disabling FreeRTOS kernel results in steady 4kHz signal. 9999 ms, depending how far through the current tick period you are when the delay starts. Therefor, I read a lot, especally about xSemaphoreGiveFromISR which seems to be the most efficiant way to deal with this problem. These are different concepts. 1199 Microseconds. Timestamp of the nearest timer event, in microseconds. This code calls vTaskDelay indirectly as it needs to wait for some milliseconds to allow for device initialization. Multiple Task SynronisationPosted by tabulous2011 on November 19, 2012What is the best way to achieve this ? Say i have 5 tasks, task 2,3,4,5 should not run until task 1 as completed. That's why the limitation on minimal period is there. Delay () Delay is an arduino function wrapper that calls vtaskdelay. A typical method is to call vTaskNotifyGiveFromISR () to wake-up a task from within an ISR. What type of context the actual switching in/out of modem sleep uses is another question, probably interrupt + preempt. This function will print the list of active timers according to the format: timer name, period of timer and time of the next alarm since boot in microseconds. If I am doing the code in a. Sometimes it delays for exactly 2 seconds but sometimes it misses 10ms. I tried to increase […]I have found the solution of this issue. You could simply verify this by replacing the call to vTaskDelayUntil with vTaskDelay (Yes, I know it’s not the same but a lot of times it is ok…) I think Richard Barry should consider. The constant portTICK_PERIOD_MS can be used to calculate real time from the tick rate - with the resolution of one tick period. There are other tasks running in the background but they have priority 2 or higher. I encountered the following problem when using it: if I use a value such as delay_us(20), it doesn't work! Driving a pin (from high to low and vice. The example demonstrates in seven steps the process of switching from a lower priority task, called TaskA, to a higher priority task, called TaskB. Support for power management. Previously I used OPEN RTOS SDK and the library whic. Forces a task to leave the Blocked state, and enter the Ready state, even if the event the task was in the Blocked state to wait for has not occurred, and any specified timeout has not expired. 1 seconds to run and the vtaskDelay is set to 2 seconds, that means that the next time this task will be scheduled after 2. Tell the scheduler to make it idle, or just delete the task: Code: Select all. This will guarantee very precise timing except when. Delaying in microseconds, Delays to things like vTaskDelay will; be in units of ticks, you could always define something like portTICKPERIODMICROSEC, but you still won’t get a finer resolution. Returns. Then when the task wakes up it could check the RTC and delay a little longer as needed. If I use vTaskDelay(), instead of vTaskDelayUntil(), along xTaskAbortDelay(), the program runs smoothly. Even in this simple form, it don't work with channel 6. I managed to get USB HID working under FreeRtos. If you select a value < portTICK_PERIOD_MS you may get a zero delay or you may get a delay of portTICK_PERIOD_MS (so 10mS). Here if i want 500ms delay i want to set my API function vTaskDelay( 500/portTICKRATEMS ) that means vTaskDelay( 500/(1000/100) ) and it is equal to vTaskDelay( 50 ), 500ms would take 50 tick interrupts if my tick frequency is 100Hz, and 1 second = 100ticks. If another task, like Task D, attempts to enter the critical section, it must first call. In this guide, we will show you how to use FreeRTOS timers and delays using ESP32 and ESP-IDF. Interrupts could produce wrong timings, it could be useful to disable them until you finish to process the movement. zazas321 Posts: 220 Joined: Mon Feb 01, 2021 9:41 am. does not delay for 5 secs. vTaskDelay () does not therefore provide a good method of controlling the frequency of a periodic. My Tick Rate is 1024 Hz. void vTaskDelayUntil ( TickType_t *pxPreviousWakeTime, const TickType_t xTimeIncrement ); INCLUDE_vTaskDelayUntil must be defined as 1 for this. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a. The question is, Why are you suspending the task, if it is to run once every 30 seconds, let it use vTaskDelayUntil (or vTaskDelay) to restart itself on schedule. while (true) { esp_timer_dump(stdout); vTaskDelay(pdMS_TO_TICKS(1000)); } Compiling the SketchHi, I have several tasks in freeRTOS on my ESP32 delaying with the vTaskDelay-function. In the main. What is the difference between Nano 328p-au and 328p-mu? 2. For a 16 MHz cpu millis() advances every 1024 microseconds. theskaz. Sorry for that and that is not obvious for me. Whereas vTaskDelay specifies a wake time relative to the time at which the function is called, vTaskDelayUntil specifies the absolute (exact) time at which it wishes to unblock. vTaskDelay for 1uS, possible?Posted by willywortel on December 3, 2008First of all, thanks everyone for the response so far. And for this reason, the prescaler value is 72. Using Arduino Programming Questions. vTaskDelay () does not therefore provide a good method of controlling the frequency of a periodic. The FreeRTOS tick frequency is set by default to 100Hz, meaning a tick will occur every 1ms. Such as vTaskDelay(1/portTICKPERIODMS) to get 1 milliseconds. 100 microseconds intervalPosted by maxciu on November 3, 2015Hi, I am a relatively new OpenRTOS user and so far I’m amazed by the possibilities it offer you when dealing with a larger embedded project. vTaskDelay cause system halt. Hello. gfvalvo February 21, 2023, 1:44am 4. Hopefully i have not overlooked. the "1st delay done" message is not printed. CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ. The code simply reads an input on the serial port and returns it with. ("MICROSECONDS","time in miliseconds=%lli",task_execution_start); // HERE BUNCH OF THINHS HAPPENING SUCH AS TOGGLING RELAYS, PRINTING VARIOUS STATES. 0 Kudos. A beginners guide, Several things at the same time and the BlinkWithoutDelay example in the IDE. start_Manage_STA_Connection () is called in main. Posted by richardbarry on January 26, 2012. 3 posts • Page 1 of 1. 2. Functions that cause the task to wait, like vTaskDelay(), put the task in the Blocked state. As I have observed that vTaskDelay is working on Tick Rate which gives milliseconds delay for application development but I want to prove some microseconds delay in my application.