The same problem description but seems to be none stack overflows. I’ve read the topic: [image] xStreamBufferReceive(..., portMAX_DELAY) Task Moves to Suspended and Never Wakes on Data Kernel Thanks everyone for your help! It turned out to be a simple stack overflow. Apo…

In assembler it looks linke this. Scheduler ISR call: 229 NVIC->IPSR[((uint32_t)(IRQn) >> 5)] = (1 << ((uint32_t)(IRQn) & 0x1F)); 00002486: lui a5,0xe000e 0000248a: lui a4,0x4 0000248c: sw a4,512(a5) # 0xe000e200 Critical section entrance: 00002490: lui a5,0x8 000…

This is synthetic test project to prove the UART debug output is operating. The priority of receiving task is highest. And two lower priority sender tasks are blinking by their diagnostic LEDs perfectly as expected. So, no, there are none tasks blocking the receiving task. Also, the receiving tas…

[image] Nikolay-Po: Also after first call of xStreamBufferSend(), xTaskWaitingToReceive in stream buffer handle become NULL. Can you put a data breakpoint on xTaskWaitingToReceive to see what is setting it to NULL?

Good question. Due to inconsistent operation of data watchpoints, had to step through xStreamBufferSend() manually with assembler instruction stepping enabled. Here is a result: [Screenshot 1] The “subscription” for stream buffer data arrival notifications is cleared at the line 924 of stream_bu…

It seems to me the problem may be related somehow to this topic: [image] Question about sending notifications from own task Kernel I have a number of projects that I’ve done with FreeRTOS over the past couple of years. I just about every project, there is some task that n…

Also very interesting topic. Looks very similar to what I see except I’m not using interrupts. [image] Task stuck at taskNOTIFICATION_RECEIVED Kernel pbleyer wrote on Monday, August 01, 2016 : Hello. I am experiencing lost task notifications in a communication module unde…

Just heavily refactored the code, used dynamic allocation, descriptor queue and direct task notification. Something is wrong with my FreeRTOS port. The queue is working but xTaskNonltifyGiveFromISR() and xTaskNotifyGet() are triggering only once. The second time the task is staying notified but sus…

Did you mean global, system stack, not the task stack itself? I’ve already increased it twice from 2048 to 4096 bytes in *.ld file.

[image] Nikolay-Po: not the task stack itself? I meant the task stack. Just for experiment, can you avoid using printf and call xStreamBufferSend directly instead of calling it from _write?

Here is higher priority monitoring task: volatile TaskStatus_t TaskState[8]; volatile uint32_t TaskStackRemainder[8] = { 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul, 0xFFFFFFFFul }; void MonitorTask(void *Parameters) { (void) Parameters; TickT…

xStreamBufferReceive(…, portMAX_DELAY) Task Moved to Suspended and Never Wakes on Data

Kernel

aggarg (Gaurav Aggarwal) August 15, 2025, 5:05am 16

The callstack looks too deep. Can you try increasing the stack size significantly?

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xStreamBufferReceive(…, portMAX_DELAY) Task Moved to Suspended and Never Wakes on Data

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