View source for Lesson 56--Microduino EEPROM Data Flow Serial Input

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==Purpose==

This course will use Microduino to achieve data flow serial input.  

==Equipment==

[[Microduino-Core]]

[[Microduino-USBTTL]]

==Schematic==


==Program==

<source lang="cpp">
    #include <EEPROM.h>
    #define EEPROM_write(address, p) {int i = 0; byte *pp = (byte*)&(p);for(; i < sizeof(p); i++) EEPROM.write(address+i, pp[i]);}
    #define EEPROM_read(address, p)  {int i = 0; byte *pp = (byte*)&(p);for(; i < sizeof(p); i++) pp[i]=EEPROM.read(address+i);}
unsigned long incomingByte = 0;   // Define the initial value of the unsigned long integer variable “incomingByte” to be 0.      
    void setup() {
      Serial.begin(9600);     // Open the serial port and set the data transmission rate to 9600. 
    }
    void loop() {
      if (Serial.available() > 0) {
        incomingByte = Serial.parseInt();  //Read the next valid serial incoming integer and assign the integer to variable incomingByte. 
        EEPROM_write(0,incomingByte)   //Write EEPROM into incomingByte from 0 address bit.   
      }
      EEPROM_read(0,incomingByte) //Read EEPROM from 0 address bit and write the value into variable incomingByte. 
      Serial.println(incomingByte); //Output by the serial port.
      delay(1000);
    }
</source>

==Debugging==

Step 1: Download the code and run it. 
[[File:EEPROMStreamInput1.png|600px|center|thumb|EEPROMStreamInput]]

Here we use Serial.parseInt() , whose function is to search the next valid integer in the incoming serial data flow.  Serial.read() can only read one byte each time, which is inconvenient while Serial.parseInt() can read a data flow each time, making it easier in the aspect.   

Step 2: Open the serial communication and meantime, in each one second should display the "unsigned long" value once in the EEPROM address 0. (Here the value of address 0 is 123456.) 
[[File:EEPROMStreamInput2.png|600px|center|thumb|EEPROMStreamInput]]

Step 3: Input any value (0~4294967295) and the data flow will be output at the bottom of EEPROM. (Here is output value is 77777.)  
[[File:EEPROMStreamInput3.png|600px|center|thumb|EEPROMStreamInput]]

==Result==

The data flow input in the serial port will be saved into EEPROM. 

==Video==

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