Eduard Sjoukes
Functions test with Optrex LCD 20x4
Dependents: DatatypesLength AsciiCode IntegerFormatSpecifiers FloatFormatSpecifier
main.cpp@3:52fb10c44695, 2010-11-29 (annotated)
- Committer:
- Eduard
- Date:
- Mon Nov 29 22:27:13 2010 +0000
- Revision:
- 3:52fb10c44695
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Eduard | 3:52fb10c44695 | 1 | /******************************************************************************************* |
| Eduard | 3:52fb10c44695 | 2 | * Program to test OptrexLCD library witch is a clone of TextLCD only with a different timing. |
| Eduard | 3:52fb10c44695 | 3 | * Normaly it takes a 40us enable puls to execute an instruction, but with the optrex 20x4 LCD |
| Eduard | 3:52fb10c44695 | 4 | * it takes 75us. Also the cls command takes 3ms instead of the 1.64ms which is normal. |
| Eduard | 3:52fb10c44695 | 5 | * Because the timing is the only difference, all functionality is equal to TextLCD. |
| Eduard | 3:52fb10c44695 | 6 | * Probally the OptrexLCD library works with other LCD as well, if not the origenal TextLCD library |
| Eduard | 3:52fb10c44695 | 7 | * can included instead. |
| Eduard | 3:52fb10c44695 | 8 | * The program write the text: "Start" and after half a second: "Hello rownr:0" next to it on the first row. |
| Eduard | 3:52fb10c44695 | 9 | * After another half a second it writes: "Second row? rownr:1" on the next row, then it |
| Eduard | 3:52fb10c44695 | 10 | * will write: "Third row? rownr:2" on the next and: "Fourth row? rownr:3" on the last. |
| Eduard | 3:52fb10c44695 | 11 | * After 1 second the screen got cleared and ASCII character nr.65 ("A") is put to the LCD at column "0" |
| Eduard | 3:52fb10c44695 | 12 | * and row "0". Then character nr.66 ("B") is written to column "1" and row "1". Next nr67 ("C") is written |
| Eduard | 3:52fb10c44695 | 13 | * to column "2", row "2" and nr68 ("D") on "3,3". Row "3" is the last row. When trying to select row "4" the |
| Eduard | 3:52fb10c44695 | 14 | * LCD goes in "Two Rows" mode instead of "Four Rows" mode. The characters "E" to "H" are written |
| Eduard | 3:52fb10c44695 | 15 | * in upwards direction. |
| Eduard | 3:52fb10c44695 | 16 | **********************************************************************************************/ |
| Eduard | 3:52fb10c44695 | 17 | #include "mbed.h" |
| Eduard | 3:52fb10c44695 | 18 | #include "OptrexLCD.h" |
| Eduard | 3:52fb10c44695 | 19 | |
| Eduard | 3:52fb10c44695 | 20 | DigitalOut BlinkLed(LED4); // when the led is blinking the program runs well |
| Eduard | 3:52fb10c44695 | 21 | |
| Eduard | 3:52fb10c44695 | 22 | TextLCD lcd(p10, p12, p15, p16, p17, p18, TextLCD::LCD20x4 ); // rs, e, d0-d3 |
| Eduard | 3:52fb10c44695 | 23 | |
| Eduard | 3:52fb10c44695 | 24 | int main() |
| Eduard | 3:52fb10c44695 | 25 | { |
| Eduard | 3:52fb10c44695 | 26 | while(1) |
| Eduard | 3:52fb10c44695 | 27 | { |
| Eduard | 3:52fb10c44695 | 28 | BlinkLed = !BlinkLed; //indicates the programm is running |
| Eduard | 3:52fb10c44695 | 29 | |
| Eduard | 3:52fb10c44695 | 30 | lcd.printf("Start "); // the printf instruction writes a text string to the LCD |
| Eduard | 3:52fb10c44695 | 31 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 32 | lcd.printf("Hello rownr:0\n"); // the "\n" directive tells the program to go to the next row. |
| Eduard | 3:52fb10c44695 | 33 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 34 | lcd.printf("Second row? rownr:1\n"); |
| Eduard | 3:52fb10c44695 | 35 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 36 | lcd.printf("Third row? rownr:2\n"); |
| Eduard | 3:52fb10c44695 | 37 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 38 | lcd.printf("Fourth row? rownr:3\n"); |
| Eduard | 3:52fb10c44695 | 39 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 40 | lcd.printf("Fifth row? rownr:4\n"); // there are only four rows, the fifth wil be at the first row, rownr:0. |
| Eduard | 3:52fb10c44695 | 41 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 42 | lcd.printf("Sixth row? rownr:5\n"); // this wil be written on the second row |
| Eduard | 3:52fb10c44695 | 43 | wait(2); |
| Eduard | 3:52fb10c44695 | 44 | |
| Eduard | 3:52fb10c44695 | 45 | lcd.cls(); // clear the LCD and go to column "0" and row "0" |
| Eduard | 3:52fb10c44695 | 46 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 47 | |
| Eduard | 3:52fb10c44695 | 48 | lcd.putc(65); // put character 65 (A) at column "0" and row "0" |
| Eduard | 3:52fb10c44695 | 49 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 50 | lcd.locate(1,1); // go to column "1" and row "1" |
| Eduard | 3:52fb10c44695 | 51 | lcd.putc(66); // put a "B" in (1,1) |
| Eduard | 3:52fb10c44695 | 52 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 53 | lcd.locate(2,2); |
| Eduard | 3:52fb10c44695 | 54 | lcd.putc(67); // put a "C" in (2,2) |
| Eduard | 3:52fb10c44695 | 55 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 56 | lcd.locate(3,3); |
| Eduard | 3:52fb10c44695 | 57 | lcd.putc(68); |
| Eduard | 3:52fb10c44695 | 58 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 59 | |
| Eduard | 3:52fb10c44695 | 60 | lcd.locate(4,3); |
| Eduard | 3:52fb10c44695 | 61 | lcd.putc(69); |
| Eduard | 3:52fb10c44695 | 62 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 63 | lcd.locate(5,2); |
| Eduard | 3:52fb10c44695 | 64 | lcd.putc(70); |
| Eduard | 3:52fb10c44695 | 65 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 66 | lcd.locate(6,1); |
| Eduard | 3:52fb10c44695 | 67 | lcd.putc(71); |
| Eduard | 3:52fb10c44695 | 68 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 69 | lcd.locate(7,0); |
| Eduard | 3:52fb10c44695 | 70 | lcd.putc(72); |
| Eduard | 3:52fb10c44695 | 71 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 72 | |
| Eduard | 3:52fb10c44695 | 73 | lcd.cls(); |
| Eduard | 3:52fb10c44695 | 74 | wait(0.5); |
| Eduard | 3:52fb10c44695 | 75 | } |
| Eduard | 3:52fb10c44695 | 76 | } |