How to toggle a GPIO pin very fast in STM32H750?
Dera Sir/Madam,
I chose STM32H750VBT6(LQFP-100 package-Revision Y-Max core clock=400MHz) for my project,based on my requirements .
Everything was fine,until I perceived that: this magnificent MCU is not capable of toggling a GPIO pin faster than 30 ns(roughly estimation).I should emphasize that to reach this speed I had to ignore using HAL_GPIO_WritePin&HAL_GPIO_TogglePin and use GPIOx->BSRR directly in my program in a very very simple loop .
If I can decrease this time to 15 ns(or less),I will reach my goal .
I searched on the Internet and found a very useful discussion in this link:
https://community.st.com/s/question/0D50X00009cdgGjSAI/stm32h7xx-fast-gpio-toggle
It seems that the H7 series has a limit to do so ,intrinsically.
Here are my questions:
1-If I use assembly language directly,can I reach this speed (15 ns)?
2-If I use Revision V of this chip(LQFP-100 package),will it solve my problem(Considering internal HW differences with Revision Y,maybe)?
3-Necessary settings were done in my program(Enabling Cell compensation and...),but none of them were useful.Since this chip is still new to me,maybe I don't know about the right settings or the sequence of the right settings. Can anybody help me about this ?
Your consideration is highly appreciated.
