Arduino for STM32

... void loop() {

if (digitalRead(PA1) != state)
Serial.println("state changed");
state = digitalRead(PA1);
delay(100);
}


and you can replace that PA1 with any pin you prefer to use.

--
OT: please post in the correct section in the forum, this section is for stm8, it could have been ignored.

... PCB, with 1-4 discrete LEDs for each color channel, including a white channel, driven by a MOSFET from a +12v power rail. I'm hoping to use a STM8 or STM32 to provide the logic and the 3 or 4 output pins to control the MOSFET.

The control logic should be do-able in a STM8 or -32. Strings of 24 ...

But defined interrupt is not actually working. I have tried with other PINs also for interrupt but non of them are working.


Now your sketch should work:


#define R1 PD1 //ROW1
#define R2 PC6 //ROW2
#define R3 PC5 //ROW3
#define R4 PC3 //ROW4
#define C1 PB4 //COL1
#define C2 PC7 //COL2 ...

I removed the the digitalPinToInterrupt macro, that was causing trouble.
After reading this https://tenbaht.github.io/sduino/usage/interrupts/ documentation it seemed better to remove it.

So here is a revised example that should work on almost all pins (see code).


// Update August 2023 by Hans ...

... and move that into my Arduino IDE overwriting the current ones in the sduino folder:
E:\Arduino\arduino-1.8.13\portable\packages\sduino\hardware\stm8\0.5.0\cores\sduino
(I have a portable Arduino IDE installation, as I use many different versions of the IDE in parralel, so this may be somewhere ...

Earlier stm32 and stm8 chips do tend not to oscillate. Adding caps usually resolve that. Or a parallel resistor.

High speed xtals tend not to need caps.


Thank you for sharing that information. You are correct that in some cases, certain STM32 and STM8 microcontrollers may require additional ...

Earlier stm32 and stm8 chips do tend not to oscillate. Adding caps usually resolve that. Or a parallel resistor.

High speed xtals tend not to need caps.

For in-circuit debugging on a BluePill board with an STLink v2 clone dongle, does the reset wire need to be connected or is that exclusively for programming the STM8?

... to set boot0 for maple(roger's) bootloader)

dfu-util -a 2 -RD sketch.bin


the alternatives are:
st-link v2
\https://www.adafruit.com/?q=ST-Link+STM8%2FSTM32+v2+Programmer&sort=BestMatch
https://www.st.com/en/development-tools/st-link-v2.html
or even better st-link v3
https://www.st.com/en ...

... to suggest that many of the HP calculators were implemented on really old chips, like 6502.

That got me thinking: has anyone seen the actual code, preferably C, that implements a calculator? porting it to a 8-bit chip (STM8?) or a STM32F030F4 would be interesting.

for fun or for benchmarking.