Arduino for STM32

Sure. Thank you so much. I will look into all of it.

ag123 wrote: Thu Dec 02, 2021 7:50 am For multitasking, there is the 1 line scheduler

Code: Select all

loop() {
void *tasks[] = { &task1(), &task2(), &task3(), NULL };
void *task;
int i=0;
while(task = tasks[i++] != NULL) *(task)();
}

I will also try this. Lets see.

Okay, got it. Got a major idea of what and how is DMA working. Will look into it in more detail. Thanks all for your patience and guidance for me to succeed further. Thanks to everyone who replied.

https://stm32f4-discovery.net/2017/07/s ... using-dma/


I have read this already. What I understand from this: If the receiving data is larger than receive buffer, then this DMA will be used to avoid the loss of data. {but as mentioned by ag123 with ring buffer (I do not lose any data) [also I ...

oh normally, uart with stm32duino(s) don't lose data, as i'd think when data is received, an interrupt fires and stm32duino puts that data in the queue (ring buffer), so that the next time Serial.read() runs, it pulls that from the queue.
the exception is if the mcu is *too busy*
a mcu with a uart ...

that's how dma is avoided.


What do you mean by DMA is avoided?


normally u'd need to design a *protocol* that sends data wait for ack, if it timeout send it again.


I agree, I have made a similar protocol as you described along with CRC (simple checksum stuff.) in UART asynchronous mode ...

Thank you so much. Just for my clear understanding and clarification, I am asking this again! So, STM32 is capable of Multitasking with the help of DMA?

Okay, let me be more clear here. I have implemented a library for a custom made PCB board with stm32f103c8t6 with lots of functionalities (All the functionality were explained as follow (The board has 6 General Purpose Output (using built internal GPIO pins) with all necessary electronics to drive ...

Thanks for your reply. Is there any example done in stm32f103c8t6 with an official stm32 core in Arduino or something similar?

Hello, :D

I am using Stm32f103c8t6 with Offical core with HID bootloader. I am working on Visual Studio Code IDE using Microsoft Arduino Extension.

Is it possible to make use of UART communication in DMA without disturbing the Loop function which will be running in CPU or Flash Memory?

If so, How ...