View source for Maple Lesson 01 - Blinking LED

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== Objective ==
Using Microduino-CoreSTM32 to control the on-board LED. Actually you can learn to how to use the Micrduino-CoreSTM32's I/O port. This is a basic skill you should master and for further study.

== Prerequisites ==

*'''[[Setting Up Maple IDE for Microduino-CoreSTM32]]]'''

== Equipment ==
*'''[[Microduino-CoreSTM32]]'''
Microduino-CoreSTM32 is a 32-bit ARM Cortex-M3 development board, based on STMicroelectronics' STM32F103CBT6.

*Other hardware equipment
**USB Data cable                   1(one) piece

== Program ==
*Using delay() function：

<source lang="cpp">
int led = 13;// Define the PIN
void setup() {                
  pinMode(led, OUTPUT);  // Define the I/O port 13 as output   
}
void loop() {
digitalWrite(led, HIGH); //I/O port 13 output High. If the connection is high lighted,the LED will light, otherwise extinguished
delay(1000);               // delay 1s
digitalWrite(led, LOW); //I/O port 13 output Low.If the connection is high lighted,the LED off, otherwise light.
delay(1000);               // delay 1s
}
</source>

*Using function millis()：Return the number of milliseconds from start running Microduino program to now.
<source lang="cpp">
int ledPin=13;
#define TIME 1000 
long time1=0,time2=0;
void setup()
{
  pinMode(ledPin,OUTPUT);
}
void loop()
{
if(millis()<time2+TIME)
{
digitalWrite(ledPin,HIGH);
time1=millis();
}
else 
{
digitalWrite(ledPin,LOW);
if(millis()>time1+TIME)
time2=millis();
}
}
</source>

Using function millis () is better than the delay () function, less resource and fewer delays on the system.

==Download program method==
*Choose the board type in "tools", the "Microduino-CoreSTM32 to Flash" if you want to run the program after reset the board, or "Microduino-CoreSTM32 to RAM" if you just want to test it for one time.

*Compile downloads
[[File:compile.jpg|600px|center|thumb]]

[[File:download.jpg|600px|center|thumb]]

==Result==
After the download, you can see LED flashes once every 1s.

==Video==

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