Arduino for STM32

From what I'm reading, doing "GPIOA->CRH = 0xFFF33333" would set the pins I want as outputs but leave the other pins on their existing state, correct? No, it would set the other pins for "Alternate function output Open-drain" (MODE and CNF both 11). For changing one pin, if I un...

Starting point would be to look at section 9.2.1 in the reference manual (RM0008). From that you would see that in CRL, there are four bits for each for each GPIO 0 to 7, so each hex digit of the value written to CRL sets the config and mode for one of those GPIO pins. GPIOA->CRL = 0x00033003; Take ...

Masoud wrote: ↑Tue Dec 15, 2020 10:05 am in boards I select: Generic STM32F103C series.

Masoud wrote: ↑Wed Dec 16, 2020 5:13 am I have a custom board which I'm sure is working.

Perhaps the generic system clock configuration (I'd guess for HSE with 8MHz crystal) does not suit your board.

stan wrote: ↑Fri Dec 18, 2020 7:18 pm Here is fft bin 12 = 3.6kHz, and SAMPLING FREQUENCY 40000, so I put 40000 to Goertzel but nothing changes.

The fft sampling at least tries to do it at a known rate. Why would you expect the Goertzel rate to be the same?

it is compiling but not working I added LCD, in uno LCD it is alive in stm32 it is dead just displays 0.00 and do on respond to signal on PA6. How are you generating the signal on PA6, and are you sure there is really something to see there? This is the sampling routine in Goertzel.cpp: /* Sample s...

I use it (Serial2) for my GPS, and I have called it in void setup. For this to work, surely you have to do more than just the Serial2.begin(9600) in setup()? From the TinyGPS++ examples I can find, you would have to execute gps.encode(Serial2.read()) whenever there is Serial2 data available, but th...

Have you tried to g**gle stm32 + neopixel + library One of the results: https://github.com/rogerclarkmelbourne/WS2812B_STM32_Libmaple yes i have downloaded this library before and it works, but unfortunatelly uses spi, which in my project is already used by nrf24l01 module. Both cannot work togethe...

I started with the example in the GitHub wiki, made the timer variable global, and used it to call setPWM in the loop: They say that great minds think alike – that is exactly what I tried. My equipment does not run to an AVOmeter, but I do have an old analog meter. With 5HZ, and 10% as in the examp...

I tried it, repeatedly setting the frequency and duty cycle to the same value. If I happen to call setPWM() when the pulse is high, then it goes low for around 35 microseconds. It does not appear to disturb or reset the overall pulse though?? The time of this low glitch seems to be independent of th...

Well, it should be only match because there is only one pin associated with certain channel. I did test the sketch with serial output, and it worked for various timers and channels. So, if you comment out the “finished = true” you still get the same pin? If I try it on a F103 blue pill board just f...