（二）STM32開發例程

 

 

 

 

 

 

 

1控制LED和繼電器

除了 PA11和PA12其他都可以

void setup() {

  pinMode(PC13, OUTPUT);
  pinMode(PC14, OUTPUT);
  pinMode(PC15, OUTPUT);
  
  pinMode(PA0, OUTPUT);
  pinMode(PA1, OUTPUT);
  pinMode(PA2, OUTPUT);
  pinMode(PA3, OUTPUT);
  pinMode(PA4, OUTPUT);
  pinMode(PA5, OUTPUT);
  pinMode(PA6, OUTPUT);
  pinMode(PA7, OUTPUT);
  pinMode(PA8, OUTPUT);
  pinMode(PA9, OUTPUT);
  pinMode(PA10, OUTPUT);
//  pinMode(PA11, OUTPUT);  // CAN t0  不能用
//  pinMode(PA12, OUTPUT);  // CAN r0  不能用
  pinMode(PA15, OUTPUT);


  pinMode(PB0, OUTPUT);
  pinMode(PB1, OUTPUT);
  pinMode(PB2, OUTPUT);
  pinMode(PB3, OUTPUT);
  pinMode(PB4, OUTPUT);
  pinMode(PB5, OUTPUT);
  pinMode(PB6, OUTPUT);
  pinMode(PB7, OUTPUT);
  pinMode(PB8, OUTPUT);
  pinMode(PB9, OUTPUT);
  pinMode(PB10, OUTPUT);
  pinMode(PB11, OUTPUT);
  pinMode(PB12, OUTPUT);
  pinMode(PB13, OUTPUT);
  pinMode(PB14, OUTPUT);
  pinMode(PB15, OUTPUT);
  
}


void loop() {
  digitalWrite(PC13, HIGH);
  digitalWrite(PC14, HIGH);  
  digitalWrite(PC15, HIGH);  
  
  digitalWrite(PA0, HIGH);  
  digitalWrite(PA1, HIGH);  
  digitalWrite(PA2, HIGH);  
  digitalWrite(PA3, HIGH);  
  digitalWrite(PA4, HIGH);  
  digitalWrite(PA5, HIGH); 
  digitalWrite(PA6, HIGH);  
  digitalWrite(PA7, HIGH);  
  digitalWrite(PA8, HIGH);  
  digitalWrite(PA9, HIGH);    
  digitalWrite(PA10, HIGH); 
 // digitalWrite(PA11, HIGH);  
 // digitalWrite(PA12, HIGH);  
  digitalWrite(PA15, HIGH);  

  digitalWrite(PB0, HIGH);  
  digitalWrite(PB1, HIGH);  
  digitalWrite(PB2, HIGH);  
  digitalWrite(PB3, HIGH);  
  digitalWrite(PB4, HIGH);  
  digitalWrite(PB5, HIGH); 
  digitalWrite(PB6, HIGH);  
  digitalWrite(PB7, HIGH);  
  digitalWrite(PB8, HIGH);  
  digitalWrite(PB9, HIGH);    
  digitalWrite(PB10, HIGH); 
  digitalWrite(PB11, HIGH);  
  digitalWrite(PB12, HIGH); 
  digitalWrite(PB13, HIGH);  
  digitalWrite(PB14, HIGH);  
  digitalWrite(PB15, HIGH);    
  
  delay(1000);              

         
  digitalWrite(PC13, LOW);
  digitalWrite(PC14, LOW);  
  digitalWrite(PC15, LOW);  
  
  digitalWrite(PA0, LOW);  
  digitalWrite(PA1, LOW);  
  digitalWrite(PA2, LOW);  
  digitalWrite(PA3, LOW);  
  digitalWrite(PA4, LOW);  
  digitalWrite(PA5, LOW); 
  digitalWrite(PA6, LOW);  
  digitalWrite(PA7, LOW);  
  digitalWrite(PA8, LOW);  
  digitalWrite(PA9, LOW);    
  digitalWrite(PA10, LOW); 
 // digitalWrite(PA11, LOW);  
 // digitalWrite(PA12, LOW);  
  digitalWrite(PA15, LOW);   

  digitalWrite(PB0, LOW);  
  digitalWrite(PB1, LOW);  
  digitalWrite(PB2, LOW);  
  digitalWrite(PB3, LOW);  
  digitalWrite(PB4, LOW);  
  digitalWrite(PB5, LOW); 
  digitalWrite(PB6, LOW);  
  digitalWrite(PB7, LOW);  
  digitalWrite(PB8, LOW);  
  digitalWrite(PB9, LOW);    
  digitalWrite(PB10, LOW); 
  digitalWrite(PB11, LOW);  
  digitalWrite(PB12, LOW); 
  digitalWrite(PB13, LOW);  
  digitalWrite(PB14, LOW);  
  digitalWrite(PB15, LOW);    
   
  delay(1000);                      
}

　　

2 PWM控制

 

 PWM引腳簡易測試程序,總共有12個PWM引腳，16bit即65536級PWM，很精密了：

延遲給100微妙 多了少了都有問題，不正常轉

void setup()
{
        pinMode(PB0, PWM);
        pinMode(PA7, PWM);
        pinMode(PA6, PWM);
        pinMode(PA3, PWM);
        pinMode(PA2, PWM);
        pinMode(PA1, PWM);
        pinMode(PA0, PWM);
        pinMode(PB7, PWM);
        pinMode(PB6, PWM);
        pinMode(PA10, PWM);
        pinMode(PA9, PWM);
        pinMode(PA8, PWM);
}
void loop()
{
        for (int i = 1000; i < 65536; i++)
        {
                //delayMicroseconds(100);
              //  delay(1);
                  delay(20);
                pwmWrite(PB0, i);
                pwmWrite(PA7, i);
                pwmWrite(PA6, i);
                pwmWrite(PA3, i);
                pwmWrite(PA2, i);
                pwmWrite(PA1, i);
                pwmWrite(PA0, i);
                pwmWrite(PB7, i);
                pwmWrite(PB6, i);
                pwmWrite(PA10, i);
                pwmWrite(PA9, i);
                pwmWrite(PA8, i);
        }
         for (int i = 65536; i > 1000; i--)
        {
               // delayMicroseconds(100);
              //  delay(1);
                  delay(20);
                pwmWrite(PB0, i);
                pwmWrite(PA7, i);
                pwmWrite(PA6, i);
                pwmWrite(PA3, i);
                pwmWrite(PA2, i);
                pwmWrite(PA1, i);
                pwmWrite(PA0, i);
                pwmWrite(PB7, i);
                pwmWrite(PB6, i);
                pwmWrite(PA10, i);
                pwmWrite(PA9, i);
                pwmWrite(PA8, i);
        }
}

　　

 

int pins[12] = {0, 1, 2, 3, 6, 7, 8, 9, 10, 16, 22, 23};
void setup()
{
  for (int i = 0; i < 12; i++)
  {
    pinMode(pins[i], PWM);
  }
}
void loop()
{
  for (int i = 0; i < 100; i++)
  {
    for (int j = 0; j < 12; j++)
    {
      pwmWrite(pins[j], i * i);
    }
    delay(20);
  }
}

　

IO引腳讀取

int value = digitalRead(pin);

 

ADC引腳

實際測試  0-4096  2的10次方

 

　

 

 在pa7接一個光敏電阻，完全遮蓋4095  手機強光基本幾十

 

 

void setup()
{
  Serial.begin(115200);
  pinMode(PB0, INPUT_ANALOG);
  pinMode(PA7, INPUT_ANALOG);
  pinMode(PA6, INPUT_ANALOG);
  pinMode(PA5, INPUT_ANALOG);
  pinMode(PA4, INPUT_ANALOG);
  pinMode(PA3, INPUT_ANALOG);
  pinMode(PA2, INPUT_ANALOG);
  pinMode(PA1, INPUT_ANALOG);
  pinMode(PA0, INPUT_ANALOG);
  pinMode(PB1, INPUT_ANALOG);
}
void loop()
{
  delay(50);
  Serial.print("\tPB0="); Serial.print(analogRead(PB0));
  Serial.print("\tPA7="); Serial.print(analogRead(PA7));
  Serial.print("\tPA6="); Serial.print(analogRead(PA6));
  Serial.print("\tPA5="); Serial.print(analogRead(PA5));
  Serial.print("\tPA4="); Serial.print(analogRead(PA4));
  Serial.print("\tPA3="); Serial.print(analogRead(PA3));
  Serial.print("\tPA2="); Serial.print(analogRead(PA2));
  Serial.print("\tPA1="); Serial.print(analogRead(PA1));
  Serial.print("\tPA0="); Serial.print(analogRead(PA0));
  Serial.print("\tPB1="); Serial.println(analogRead(PB1));
}

　　

 中斷

　　 
void onChange()
{
   if ( digitalRead(PA8) == LOW )
      Serial.println("Key Down");
   else
      Serial.println("Key UP");
}
 
void setup()
{
   Serial.begin(9600); //打開串口
 
   pinMode( PA8, INPUT);//設置管腳為輸入
   
   //Enable中斷管腳, 中斷服務程序為onChange(), 監視引腳變化
 /*
LOW                  低電平觸發
CHANGE            電平變化，高電平變低電平、低電平變高電平
RISING              上升沿觸發
FALLING            下降沿觸發
HIGH                 高電平觸發(該中斷模式僅適用於Arduino due)
 */
   attachInterrupt( PA8, onChange, CHANGE);
}
 
void loop()
{
  // 模擬長時間運行的進程或復雜的任務。
  for (int i = 0; i < 100; i++)
  {
    // 什么都不做，等待10毫秒
    delay(10); 
  }
}

　　

允許的串口

總共3個硬件外接串口Serial1、Serial2、Serial3，一個USB虛擬串口Serial：

void setup()
{
  Serial.begin(115200);
  Serial1.begin(115200);  //TX=PA9,RX=PA10
  Serial2.begin(115200);  //TX=PA2,RX=PA3
  Serial3.begin(115200);  //TX=PB10,RX=PB11
}
void loop()
{
  delay(100);
  Serial.println("Test Serial");
  Serial1.println("Test Serial1");
  Serial2.println("Test Serial2");
  Serial3.println("Test Serial3");
}