BERTL_CHEL18 / Mbed 2 deprecated _B14Test8_D2_blinkI2C_LED

Bertl 2014 Übung

Dependencies:   mbed

Fork of _B14Test8_D2_blinkI2C_LED by BULME_BERTL14

main.cpp@0:1bf3770a24f7, 2015-01-25 (annotated)

Committer:
Enenkel
Date:
Sun Jan 25 17:31:14 2015 +0000
Revision:
0:1bf3770a24f7
via I2C mit D2 blinken

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Enenkel 0:1bf3770a24f7 1 /***********************************
Enenkel 0:1bf3770a24f7 2 name: BERTL_2014_LED D2 blink via I2C
Enenkel 0:1bf3770a24f7 3 modyfied by ENE@bulme.at
Enenkel 0:1bf3770a24f7 4 description:
Enenkel 0:1bf3770a24f7 5 Alle LED sind INVERS dh 0 = EIN; 1 = AUS;
Enenkel 0:1bf3770a24f7 6 mit LED D2 blinken
Enenkel 0:1bf3770a24f7 7 */
Enenkel 0:1bf3770a24f7 8
Enenkel 0:1bf3770a24f7 9 #include "mbed.h"
Enenkel 0:1bf3770a24f7 10 /*** Portkonfiguration ***/
Enenkel 0:1bf3770a24f7 11 Serial pc(USBTX, USBRX); // tx, rx
Enenkel 0:1bf3770a24f7 12 I2C i2c(p28,p27);
Enenkel 0:1bf3770a24f7 13
Enenkel 0:1bf3770a24f7 14 /*** Funktionsdefinitionen ***/
Enenkel 0:1bf3770a24f7 15
Enenkel 0:1bf3770a24f7 16 const int addr = 0x40; // I2C-Adresse PCA9555
Enenkel 0:1bf3770a24f7 17 char cmd[3]; // Datenarray für I2C
Enenkel 0:1bf3770a24f7 18
Enenkel 0:1bf3770a24f7 19 /*** Funktionen ***/
Enenkel 0:1bf3770a24f7 20 int main()
Enenkel 0:1bf3770a24f7 21 {
Enenkel 0:1bf3770a24f7 22 /*** I2C Konfigurationen ***/
Enenkel 0:1bf3770a24f7 23 i2c.frequency(40000); // I2C Frequenz 40kHz
Enenkel 0:1bf3770a24f7 24 cmd[0] = 0x06;
Enenkel 0:1bf3770a24f7 25 cmd[1] = 0x00;
Enenkel 0:1bf3770a24f7 26 i2c.write(addr, cmd, 2); // Define Port0 = Out
Enenkel 0:1bf3770a24f7 27
Enenkel 0:1bf3770a24f7 28
Enenkel 0:1bf3770a24f7 29 /*** Hauptprogramm - Endlosschleife ***/
Enenkel 0:1bf3770a24f7 30 while(1)
Enenkel 0:1bf3770a24f7 31 {
Enenkel 0:1bf3770a24f7 32 cmd[0] = 0x02;
Enenkel 0:1bf3770a24f7 33 cmd[1] = 0xFD; // D2 ON -> 1111 1101
Enenkel 0:1bf3770a24f7 34 i2c.write(addr, cmd, 2); // Def. Port0 = 0xFD
Enenkel 0:1bf3770a24f7 35 wait(0.5);
Enenkel 0:1bf3770a24f7 36
Enenkel 0:1bf3770a24f7 37 //cmd[0] = 0x02; // nicht mehr nötig, da bereits definiert !
Enenkel 0:1bf3770a24f7 38 // und nicht verändert
Enenkel 0:1bf3770a24f7 39 cmd[1] = 0xFF; // Alle LED OFF -> 1111 1111
Enenkel 0:1bf3770a24f7 40 i2c.write(addr, cmd, 2); // Def. Port0 = 0xFF
Enenkel 0:1bf3770a24f7 41 wait(0.5);
Enenkel 0:1bf3770a24f7 42
Enenkel 0:1bf3770a24f7 43 }
Enenkel 0:1bf3770a24f7 44 }