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  1. //----------------------------------------------------------------
  2. #include <Arduino.h>
  3.  
  4. static int PIN_A PB0; // Encoder PIN A
  5. static int PIN_B PB1; // Encoder PIN B
  6. static int BUTTON PA7; // Button PIN
  7.  
  8. volatile bool aFlag = 0;
  9. volatile bool bFlag = 0;
  10. volatile uint16_t reading = 0;
  11. volatile int16_t count = 0; // +1 from CW and -1 from CCW (for sample)
  12. volatile bool button = 0; // Button pressed flag (for event out of interrupt)
  13. volatile bool cw_flag = 0; // Clockwise flag (for event out of interrupt)
  14. volatile bool ccw_flag = 0; // Counterclockwise flag (for event out of interrupt)
  15.  
  16. void CW(){
  17.   noInterrupts();
  18.   reading = GPIOB->IDR & 0x3;
  19.   if(reading == 0b0000000000000011 && aFlag)
  20.   {
  21.     bFlag = 0;
  22.     aFlag = 0;
  23.     cw_flag = 1; // Set the clockwise rotation flag
  24.     count ++; // Counter +1
  25.   }
  26.   else if (reading == 0b0000000000000001) bFlag = 1;
  27.   interrupts();
  28. }
  29.  
  30. void CCW(){
  31.   noInterrupts();
  32.   reading = GPIOB->IDR & 0x3;
  33.   if (reading == 0b0000000000000011 && bFlag)
  34.   {
  35.     bFlag = 0;
  36.     aFlag = 0;
  37.     ccw_flag = 1; // Set the Counterclockwise rotation flag
  38.     count --; // Counter -1
  39.   }
  40.   else if (reading == 0b0000000000000010) aFlag = 1;
  41.   interrupts();
  42. }
  43.  
  44. void BUT(){
  45.   noInterrupts();
  46.   button = 1; // Set button pressed flag
  47.   interrupts();
  48. }
  49.  
  50. void setup() {
  51.   Serial1.begin(115200);
  52.   Serial.println("");
  53.   Serial.println("Please turn the encoder!");
  54.   pinMode(PIN_A, INPUT_PULLUP);
  55.   pinMode(PIN_B, INPUT_PULLUP);
  56.   pinMode(BUTTON, INPUT_PULLUP);
  57.   attachInterrupt(digitalPinToInterrupt(PIN_A), CW, RISING);
  58.   attachInterrupt(digitalPinToInterrupt(PIN_B), CCW, RISING);
  59.   attachInterrupt(digitalPinToInterrupt(BUTTON), BUT, RISING);
  60. }
  61.  
  62. void loop() {
  63.   if (cw_flag==1) // out of interrupt handling CW
  64.   {
  65.     Serial.println("-->");
  66.     Serial.println(count);
  67.     cw_flag = 0;
  68.   }
  69.   if (ccw_flag == 1) // out of interrupt handling CCW
  70.   {
  71.     Serial.println("<--");
  72.     Serial.println(count);
  73.     ccw_flag = 0;
  74.   }
  75.   if (button == 1) // out of interrupt handling button
  76.   {
  77.     Serial.println("PUSHED");
  78.     button = 0;
  79.   }
  80. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:2:10: fatal error: Arduino.h: No such file or directory
 #include <Arduino.h>
          ^~~~~~~~~~~
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/9oMlVS
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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