Hi,
I bought the following product from SeeedStudio: http://www.seeedstudio.com/wiki/Grove_-_4-Digit_Display
I have some problems with the following code. I don't get why something like tm1637.display(0,0); ends up displaying a 0 at the first digit of the 4-Digit_Display, but something like tm1637.display(1,x1); or tm1637.display(2,inputString[2]); displays only rubbish at the second and third digit.
Please help!!
Thank you for your input!
ygreq
/*
I started from the example from the link
http://www.arduino.cc/en/Tutorial/SerialEvent
Set to newline.
In this example you have to open the serial window and type 4 digits.
Ex: 1234 and press Enter.
See what happens on the serial monitor and on the 4-digit display
*/
String inputString = ""; // a string to hold incoming data
char x1 = 0; // char to attribute to 2nd digit of the display
#include "TM1637.h"
#define CLK 2//pins definitions for TM1637 and can be changed to other ports
#define DIO 3
TM1637 tm1637(CLK,DIO);
void setup() {
// initialize serial:
Serial.begin(9600);
tm1637.init();
tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
}
void loop() {
if (Serial.available() > 0) {
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
// if the incoming character is a newline,
if (inChar == '\n') {
Serial.print("string ");
Serial.println(inputString); //print string
tm1637.display(0,0); // display 0 on the first digit
x1 = inputString[1]; // attach x1 to the second char in the string created
Serial.print("2nd digit ");
Serial.println(x1); // print that second char to check if everything is ok
tm1637.display(1,x1);// display the char attached to x1 on the second digit
// which does not work. Why??
Serial.print("3rd digit ");
Serial.println(inputString[2]);
tm1637.display(2,inputString[2]);// display the char attached to 3rd char on
// the 3rd digit
// which does not work. Why??
inputString = ""; // delete string
}
}
}
I am guessing it is not arduino lingo per se, but C.
