Arduino for STM32

I was reading a post about ST using the same DIE for several MCUs and saw that the F030F and F030K uses the same DIE, so both must have the same flash size...right?, I did a test using the U8x8 lib,the graphic test, using I2C and yes, it works:

Sketch uses 31572 bytes (96%) of program storage ...

Don't remember if serial does verification but upload by stlink does verification, so if you don't got any error on the stlink upload everything was right with the MCU, so the problem is somewhere else, without posting an schematic are just guesses:

- Boot pins is it configured right?... to boot ...

@.rpv thanks!

ok i'd need to fix up my blue pill 'oscilloscope' & get that 74HCTxx (on the way) :mrgreen:

but SN74LVC1G17 seemed the best of them all.
this and the 74HCTxx series are hcmos devices,
https://www.ti.com/lit/pdf/scla007
so I'd guess it kind of says that hcmos devices are after all ...

So I was curious and I tried:

Channel 1 (yellow) it's the DUT output, Channel 2 (green) it's the fungen, the VIN on the DUT was 5V.

LM321 with no load:

lm321_noload.png

LM321 with 1nf capacitor as load (barely any difference):

lm321_1nf.png

For comparison, SN74LVC1G17 with 1nf cap as load ...

The bed mosfet should be the most required to do an pwm level-up, but also it's really slow (~10hz), probably you can use an lm321/lm358/lm324 as comparator, for the heaters and fans the easiest way should be changing the mosfets:

-for the heater(s) the IRLZ44N works fine with 3v3
-on fans use the ...

Ok, first, in my experience using unsigned long it's problematic if you don't specify literally on each mention/operation

Something like this should work:

unsigned long x=1000000;

setup(){
//...//
Serial.print(x);
}

But I'll expect funny things on this:

unsigned long x;

setup(){
//...//
x ...

One project that I got for about 2 years it's to make a 3d printer controller :lol:

I just collected a few parts but still haven't started yet ;)

74HC125 (quad) (untested)
https://www.aliexpress.com/item/32344341714.html

SN74HC125 (single) (I tested this part and works nice)
https://www ...

You aren't posting any info or the actual errors that you're getting, but it seems that you aren't selecting the right board on the arduino ide or you core installation on the IDE may be incomplete.

The eeprom libraries are supplied on both STCore and on libmaple-type cores and neither should give ...

Is your board like this:

https://raw.githubusercontent.com/bigtreetech/ramps-1.6/master/Ramps1.6/hardware/R6%2B-SCH.pdf

?

if so you can connect vcc to 3v3, all but the mosfet should work with 3v3 as VCC, you just need to level up the PWM to 5v, this also because the thermistors are connected to ...

Hi, are you using an external eeprom?, if you're using the internal flash as eeprom and if you're using the stcore you can use the standar eeprom library, no need to use external libraries, you can use the standard API:

https://www.arduino.cc/en/Reference/EEPROM

The libmaple variants also support ...