I already have the 256k I2c if you write something I can test them, the spi are more expensive and rare

Could you make both versions? The ones found on a well-known Chinese site already mounted on a board are in I2C.

I'm sorry I didn't notice

HELLO I wanted to ask if you could create a component for FRAM-type memories, which have the advantage of being very fast at up to 3.4 MHz on the bus and, above all, can withstand trillions of read and write cycles. It's an inexpensive component from the MB85RC series, available in various sizes: 25...

Now I have another type of problem, everything works fine if I use serial 1 but if I put the software serial for example the tx port C13 nothing comes out, C14 arrives ......, C15 nothing comes out, A0 seems to work fine, are there preferable pins for the software serial? I haven't tried other pins ...

even with the original FC10 STARM_CAL_RTC.c adding the lines of code works

by entering the C code
__HAL_RCC_PWR_CLK_ENABLE();
HAL_PWR_EnableBkUpAccess();
__HAL_RCC_LSE_CONFIG(RCC_LSE_ON);
__HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
of the old "STM32F QUESTIONS" thread works still with the old STARM_CAL_RTC.c, now I try with the original FC10 one

I only see 1 flash of 1 second and then always off, if in the code I invert the position of the UART block with RTC no flashing always off

I just need it to see if the code runs

tried different configurations, turning it off and on again but it always blocked