Arduino for STM32

Posted: **Sun Sep 12, 2021 9:44 am**

There is miss alignment between PB12 ~ PB15 and PB_12 ~ PB_15 for black pill.
Value for PB12 ~ PB15 is 27 ~30
Value for PB_12 ~ PB_15 is 28 ~ 31
It can be test by

Code: Select all

void setup(void) {
  Serial1.begin(9600);
}

void loop() {
  Serial1.print(PB12);
  Serial.print("\t");
  Serial1.print(PB13);
  Serial.print("\t");
  Serial1.print(PB14);
  Serial.print("\t");
  Serial1.println(PB15);
  Serial1.print(PB_12);
  Serial.print("\t");
  Serial1.print(PB_13);
  Serial.print("\t");
  Serial1.print(PB_14);
  Serial.print("\t");
  Serial1.println(PB_15);
  Serial1.println(PB_11);
  delay(1000);
}

The result shown here

: Capture.PNG (10.74 KiB) Viewed 2969 times

I also print out the PB_11, however Black Pill FC411CE does not have PB11 on the board as shown in the picture below.

I try to directly call the 'PB11', but it got error here

Code: Select all

test_pin:20:19: error: 'PB11' was not declared in this scope; did you mean 'PB_11'?
   20 |   Serial1.println(PB11);
      |                   ^~~~
      |                   PB_11
exit status 1
'PB11' was not declared in this scope; did you mean 'PB_11'?

So 'PB_11' here might be the one cause the problem. Moreover the later pin will probably also been affected, haven't tested yet.

My computer development environment is: Windows 10 19043.1165, arduino IDE 1.8.16, core 2.0.0, upload method SWD through ST-LINK

: Capture2.PNG (9.05 KiB) Viewed 2969 times

Posted: **Mon Sep 13, 2021 2:39 pm**

There is no issue.
PB12 is the pin number while PB_12 is the pin name which is a combination of GPIO Port and pin.
For PB11(pin number) as it is not available physically on the board, it is simply not defined.

Arduino for STM32

Black Pill miss alignment between PB12 ~ PB15 and PB_12 ~ PB_15

Black Pill miss alignment between PB12 ~ PB15 and PB_12 ~ PB_15

Re: Black Pill miss alignment between PB12 ~ PB15 and PB_12 ~ PB_15