[digital] added 7segment with hcsr control

Chapter02-Digital/03-rtos-7segment-hcsr/03-rtos-7segment-hcsr.ino

@@ -0,0 +1,121 @@
+// ====================================================
+// ArduRTOS Copyright(C) 2018 Furkan Türkal
+// This program comes with ABSOLUTELY NO WARRANTY; This is free software,
+// and you are welcome to redistribute it under certain conditions; See
+// file LICENSE, which is part of this source code package, for details.
+// ====================================================
+
+#include <Arduino_FreeRTOS.h>
+#include "LedControl.h"
+
+#define PIN_HCSR04_TRIG 7
+#define PIN_HCSR04_ECHO 8
+
+#define RANGE_HCSR04_MAX 200
+#define RANGE_HCSR04_MIN 3
+#define RANGE_HCSR04_NO_ECHO -1
+
+LedControl lc = LedControl(10, 12, 11, 1);
+
+void vTask7SGMNT(void *pvParameters);
+void vTaskHCSR04(void *pvParameters);
+
+void setup() {
+  pinMode(PIN_HCSR04_ECHO, INPUT);
+  pinMode(PIN_HCSR04_TRIG, OUTPUT);
+
+  //Clear LCD module
+  lc.shutdown(0, false);
+  lc.setIntensity(0, 8);
+  lc.clearDisplay(0);
+
+  //Task for 7-Segment-Display 
+  //Priority: 1
+  xTaskCreate(
+    vTask7SGMNT,
+    (const portCHAR *) "Task - 7Segment",
+    100,
+    NULL,
+    1,
+    NULL
+  );
+
+  //Task for HCSR04 sensor 
+  //Priority: 1
+  xTaskCreate(
+    vTaskHCSR04,
+    (const portCHAR *) "Task - HCSR04",
+    100,
+    NULL,
+    1,
+    NULL
+  );
+
+  vTaskStartScheduler();
+}
+
+void loop() {
+  // Must be empty to run Tasks correctly
+}
+
+void vTaskHCSR04(void *pvParameters){
+  (void) pvParameters;
+  const char *pcTaskName = "Task: ";
+
+  Serial.begin(9600);
+  Serial.println("Task[vTaskHCSR04]::Initialized!");
+
+  volatile uint32_t lDuration = 0;
+  volatile uint32_t lDistance = 0;
+
+  for(;;){
+    Serial.print(pcTaskName);
+    Serial.println(lDistance);
+
+    taskDISABLE_INTERRUPTS();
+
+    digitalWrite(PIN_HCSR04_TRIG, LOW);
+    vTaskDelay(2 / portTICK_PERIOD_MS);
+
+    digitalWrite(PIN_HCSR04_TRIG, HIGH);
+    vTaskDelay(5 / portTICK_PERIOD_MS);
+    digitalWrite(PIN_HCSR04_TRIG, LOW);
+
+    taskENABLE_INTERRUPTS();
+
+    lDuration = pulseIn(PIN_HCSR04_ECHO, HIGH);
+    lDistance = lDuration / 29.1 / 2;
+
+    if(lDistance > RANGE_HCSR04_MAX){
+      lDistance = RANGE_HCSR04_NO_ECHO;
+    } else {
+      lDistance = constrain(lDistance, RANGE_HCSR04_MIN, RANGE_HCSR04_MAX);
+    }
+
+    vTaskDelay(100 / portTICK_PERIOD_MS);
+  }
+}
+
+void vTask7SGMNT(void *pvParameters) {
+  (void) pvParameters;
+  const char *pcTaskName = "Task: ";
+
+  Serial.begin(9600);
+  Serial.println("Task[vTask7SGMNT]::Initialized!");
+
+  byte current = 0;
+
+  for(;;) {
+      Serial.print(pcTaskName);
+      Serial.println(current);
+
+      if(current % 10 == 0) current = 0;
+
+      lc.setDigit(0, 3, 9 - current, false);
+
+      current++;
+
+      vTaskDelay(1000 / portTICK_PERIOD_MS);
+  }  
+}
+