凶王的部落

在開始在ArduinoIDE上開發前,請先參考以下兩篇,如果已經熟悉可忽略

STM32duino-如何在ArduinoIDE使用STM32(新版)(以STM32F103為例)

https://karta146831.pixnet.net/blog/post/337328807-stm32duino-%E5%A6%82%E4%BD%95%E5%9C%A8arduinoide%E4%BD%BF%E7%94%A8stm32(%E6%96%B0%E7%89%88)(%E4%BB%A5stm32f1

STM32duino-如何在ArduinoIDE使用STM32(新版)(以STM32L475為例)

https://karta146831.pixnet.net/blog/post/337315109-stm32duino-%E5%A6%82%E4%BD%95%E5%9C%A8arduinoide%E4%B8%8A%E9%96%8B%E7%99%BC%E6%9B%B4%E5%A4%9Astm32%E7%B3%BB%E5%88%97(%E4%BB%A5

下方有程式碼,請自行複製貼上

請參照下方腳位說明:

PWM:

PA0,PA1, PA2, PA3, PA6, PA7, PA8, PA9, PA10, PB0, PB6, PB7

ADC:

PA0,PA1, PA2, PA3, PA4, PA5, PA6, PA7

TXRX:

(這個的串口名稱是有規定不能隨意更改的,因為STM的溝通方式本來就不適用Arduino內建的Serial函式庫)

範例如下

I2C :(預設是默認使用I2C1也就是PB6,PB7,第二組需要另外再開啟)

該範例將使用TIM1產生兩個不同的計時器,週期為0.5跟1秒,可以從結果中推論出同樣做一樣的動作但週期的不同

累加數值的速度更快,而且從運行的數值發現是符合規律的

程式碼:

#include "STM32TimerInterrupt.h"
#include "STM32_ISR_Timer.h"

#define TIMER_INTERVAL_MS         100
#define HW_TIMER_INTERVAL_MS      50

int A = 0;
int B = 0;
int C = 0;

// Depending on the board, you can select STM32 Hardware Timer from TIM1-TIM22
// For example, F767ZI can select Timer from TIM1-TIM14
// If you select a Timer not correctly, you'll get a message from ci[ompiler
// 'TIMxx' was not declared in this scope; did you mean 'TIMyy'? 

// Init STM32 timer TIM1
STM32Timer ITimer(TIM1);

// Init STM32_ISR_Timer// Each STM32_ISR_Timer can service 16 different ISR-based timers
STM32_ISR_Timer ISR_Timer;

#define TIMER_INTERVAL_0_5S           500L
#define TIMER_INTERVAL_1S             1000L

void TimerHandler()
{ISR_Timer.run();}

// In STM32, avoid doing something fancy in ISR, for example complex Serial.print with String() argument
// The pure simple Serial.prints here are just for demonstration and testing. Must be eliminate in working environment
// Or you can get this run-time error / crash
void doingSomething1()
{
   A = A + 1;
}

void doingSomething2()
{
  B = B + 1;
}
/*void doingSomething3()
{
  digitalWrite(LED_RED, !digitalRead(LED_RED));
}*/

void setup()
{
  Serial.begin(115200);
  delay(100);
  Serial.print(F("\nStarting TimerInterruptDemo on : ")); 
  Serial.println(BOARD_NAME);
  Serial.println(STM32_TIMER_INTERRUPT_VERSION);
  Serial.print(F("CPU Frequency = ")); 
  Serial.print(F_CPU / 1000000); 
  Serial.println(F(" MHz"));
  // Instantiate HardwareTimer object. Thanks to 'new' instanciation, HardwareTimer is not destructed when setup() function is finished.
  //HardwareTimer *MyTim = new HardwareTimer(Instance);

  // Interval in microsecs
  if (ITimer.attachInterruptInterval(HW_TIMER_INTERVAL_MS * 1000, TimerHandler))
  {
    Serial.print(F("Starting ITimer OK, millis() = ")); Serial.println(millis());
  }
  else
    Serial.println(F("Can't set ITimer. Select another freq. or timer"));
    
  // Just to demonstrate, don't use too many ISR Timers if not absolutely necessary
  // You can use up to 16 timer for each ISR_Timer
  ISR_Timer.setInterval(TIMER_INTERVAL_0_5S,  doingSomething1);
  ISR_Timer.setInterval(TIMER_INTERVAL_1S,    doingSomething2);
}

void loop()
{
  Serial.print("A:");
  Serial.print(A);
  Serial.print("B:");
  Serial.println(B);
  delay(100);
}

執行結果: