STM32duino Blue Pill Stuck While Runing

1

Hi,

I am using STM32F103 Blue Pill Board connected a AS5600 magnetic encoder over PB11 SDA and PB10 SCL I2C lines.
The code upload to the STM32 Blue Pill over ST-LINK V2:

#include "Arduino.h"
#include <SoftwareSerial.h>

#include "AS5600.h"
#include "Wire.h"

TwoWire Wire2(PB11, PB10);
AS5600 as5600(&Wire2);   //  use default Wire

SoftwareSerial ser(PA3, PA2);
#define Serial ser

void setup()  
{
  Serial.begin(57600);
  Serial.println(__FILE__);
  Serial.print("AS5600_LIB_VERSION: ");
  Serial.println(AS5600_LIB_VERSION);
  as5600.begin(PB12);  //  set direction pin.
  as5600.setDirection(AS5600_CLOCK_WISE);  // default, just be explicit.
  int b = as5600.isConnected();
  Serial.print("Connect: ");
  Serial.println(b);
  //pinMode(PC13, OUTPUT);
} 
void loop()  
{ 
  //  Serial.print(millis());
  //  Serial.print("\t");
  Serial.println(as5600.readAngle());
  digitalWrite(LED_BUILTIN, LOW);

  //Serial.print("\t");
  //Serial.println(as5600.rawAngle());
  //  Serial.println(as5600.rawAngle() * AS5600_RAW_TO_DEGREES);
 delay(2000);
  digitalWrite(LED_BUILTIN, HIGH);
  delay(2000);
}

ESP32 to read the encoder data over serial:

#include "Arduino.h"

void setup() {
       
  // put your setup code here, to run once:
Serial.begin(9600);
Serial2.begin(57600);

}

void loop() {

//-------------------------------Check Serial Port---------------------------------------
 
 while (Serial2.available()){
  delay(1);
  if(Serial2.available()>0){
  char c = Serial2.read();
    Serial.print(c);   
  }
 }
}

When the reset button on STM32 Blue Pill is pressed:

␀␀␀␀␀␀���;␀␀␀␀␀␀␂␀␀␀␀␀␀␀␀␀␀␀␀src\main.cpp
AS5600_LIB_VERSION: 0.4.0
Connect: 1
0

and it stucks.

STM32 Blue Pill .ini file:
(I have used upload_flags = -c set CPUTAPID 0x2ba01477
due to the fake chip id)

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:blackpill_f103c8]
platform = ststm32
board = blackpill_f103c8
framework = arduino
upload_flags = -c set CPUTAPID 0x2ba01477
lib_deps = 
	robtillaart/AS5600@^0.4.0
	Wire
	khoih-prog/STM32_PWM@^1.0.1
monitor_speed = 9600

I want code to loop. What can be the problem?

2

…but… LED_BUILTIN is also PB12. So your pins are conficting.

3

Hi maxgerhardt,

Thanks for your attention. Actually, in my Blue Pill board the builtin led is connected to the PC13. However as you mentioned it is defined as PB12. Also I forgot to define pin type! I revised the code, but the problem is the same.

#include "Arduino.h"
#include <SoftwareSerial.h>

#include "AS5600.h"
#include "Wire.h"

TwoWire Wire2(PB11, PB10);
AS5600 as5600(&Wire2);  

SoftwareSerial ser(PA3, PA2);
#define Serial ser

#define LED_BUILTIN PC13

void setup()  
{
  Serial.begin(57600);
  Serial.println(__FILE__);
  Serial.print("AS5600_LIB_VERSION: ");
  Serial.println(AS5600_LIB_VERSION);

  as5600.begin(PB12);  //  set direction pin.
  as5600.setDirection(AS5600_CLOCK_WISE);  // default, just be explicit.
  int b = as5600.isConnected();
  Serial.print("Connect: ");
  Serial.println(b);

  pinMode(LED_BUILTIN, OUTPUT);
} 
void loop()  
{ 

  Serial.println(as5600.readAngle());
  digitalWrite(LED_BUILTIN, LOW);
 delay(2000);
  digitalWrite(LED_BUILTIN, HIGH);
  delay(2000);
}
4

You revised which code? The code below is the same, still using PB12. If anyhting, if you have a blue pull, you should be changing

to bluepill_f103c8, to fix the LED definition. Or better yet, just leave the LED blinking code out for now. In any case, you should not be modifying framework files to fix this (C:\Users\<user>\.platformio\packages\framework-arduinoststm32), as any changes would be destroyed on packet updates and is unreproducible for other computers.

5

PB12 for LED? This sounds wrong:
https://i.stack.imgur.com/lIPdd.png
LED_BUILTIN is at pin PC13.