Arduino for STM32

Pour une vingtaine d'euros, la carte Nucleo-L432KC permet de débuter facilement, le STLINK est intégré.
Pas besoin de bidouiller les cavaliers.
La gamme des Nucleo est suffisamment étendue pour trouver la carte idéale.
Problème, pas trop de stock en ce moment, comme pour les MCUs.

Third episod!
I am now displaying the current local datetime live but the card is always freezing.
I found out that the problem is that setenv causes memory leak. It is a well known behavior, perfectly documented.

As I call it twice each time I want to get the local datetime, I quickly run out ...

There is a follow up to this topic.

I need to monitor things for a long time (12 hours). So I wanted to setup the RTC, set an alarm and wait for alarm match.
First part is achieved with NTP and RTC, but with localtime. The problem is if there is overlap between the alarm boundaries and the timezone ...

I found a way to have right UTC and local datetime.
Basically, I set the RTC with functions setTime and setDate and I don't use setEpoch anymore.

This is the code:

//////////
// Time //
//////////

void time_init() {
// Time zone Europa/Paris
setenv("TZ", "CET-1CEST,M3.5.0,M10.5.0/3", 1 ...

I am trying to use the RTC of my STM32F746G-Discovery with standard NTPCLient and STM32Duino RTC libraries.
I use NTP to retrieve the current UTC datetime and to set epoch of the RTC.

The problem is when I want to get the RTC value.
If I set RTC epoch with NTP as local time:

localtime from RTC ...

I forgot one point:
HAL_SDRAM_MODULE_ENABLED needs to be defined in variant.h.

It is working now. I was missing to program the SDRAM chip.
I found a working example with STM32CubeIDE in folder STM32Cube\Repository\STM32Cube_FW_F7_V1.16.0\Projects\STM32746G-Discovery\Examples\FMC\FMC_SDRAM\SW4STM32.
I just had to copy the relevant functions and constants:

void HAL_SDRAM ...

Hello mrburnette , mlundin ,
Thank you for your answers.

I tried to use SDRAM as a special memory section. I modified the ldscript.ld. Then I added function to initialize SDRAM:

#include "stm32f7xx_hal_sdram.h"

void HAL_SDRAM_MspInit(SDRAM_HandleTypeDef *hsdram) {
GPIO_InitTypeDef gpio_init ...

I am using a STM32F746 Discovery board.
I am slowly adding fonctionnalities.
First, LTDC, touch and LVGL. Working fine.
Then SD, still OK.
And finally, Ethernet.
Et là, c'est le drame... Blank screen.
The problem is that i am running out of memory: when I try to allocate buffer for LTDC, malloc ...

Hi fpiSTM ,
Sorry, but it seems that apart the buffer fix, D_CACHE_DISABLED is still needed in normal use.
I have done some tests today;

With D_CACHE_DISABLED display is perfect with Adafruit_GFX standard tests.
Without D_CACHE_DISABLED there is display glitch with same tests.

Yesterday, I ...