(Real Time Operating System).
Multi Tasking on Arduino Nano.
Led Blink and Serial Communication
http://ift.tt/2b30d2l.
#include
int n = 0;
// define two tasks for Blink & AnalogRead
void TaskBlink( void *pvParameters );
void TaskTadaa( void *pvParameters );
// the setup function runs once when you press reset or power the board
void setup() {
// Now set up two tasks to run independently.
xTaskCreate(
TaskBlink
, (const portCHAR *)"Blink" // A name just for humans
, 128 // Stack size
, NULL
, 2 // priority
, NULL );
xTaskCreate(
TaskTadaa
, (const portCHAR *) "Tadaa"
, 128 // This stack size can be checked & adjusted by reading Highwater
, NULL
, 1 // priority
, NULL );
// Now the task scheduler, which takes over control of scheduling individual tasks, is automatically started.
}
void loop()
{
// Empty. Things are done in Tasks.
}
/*--------------------------------------------------*/
/*---------------------- Tasks ---------------------*/
/*--------------------------------------------------*/
void TaskBlink(void *pvParameters) // This is a task.
{
(void) pvParameters;
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
for (;;) // A Task shall never return or exit.
{
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
vTaskDelay( 1000 / portTICK_PERIOD_MS ); // wait for one second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
vTaskDelay( 1000 / portTICK_PERIOD_MS ); // wait for one second
}
}
void TaskTadaa(void *pvParameters) // This is a task.
{
(void) pvParameters;
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
for (;;)
{
// read the input on analog pin 0:
n++;
if (n>100){n = 0;}
// print out the value you read:
Serial.print("Tadaa...");
Serial.println(n);
vTaskDelay(2000/portTICK_PERIOD_MS);// 2 second delay
// one tick delay (15ms) in between reads for stability
}
}
