Marout Yasuo Sluijter-Borms / Mbed 2 deprecated PCF8574_ButtonPress

Read status of buttons on D5-D7 of PCF8574. Turn on corresponding led D0-D3.

Dependencies:   PCF8574 mbed

main.cpp@0:c862449fe089, 2016-04-04 (annotated)

Committer:
hainjedaf
Date:
Mon Apr 04 20:59:46 2016 +0000
Revision:
0:c862449fe089
Child:
1:85d249817f55
werkt niet;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hainjedaf 0:c862449fe089 1 /*
hainjedaf 0:c862449fe089 2 * Naam: PCF8574_ButtonPress
hainjedaf 0:c862449fe089 3 *
hainjedaf 0:c862449fe089 4 * Omschrijving:
hainjedaf 0:c862449fe089 5 * I2C testprogramma:
hainjedaf 0:c862449fe089 6 * -Configureer PCF8574 4x OUT, 4x IN.
hainjedaf 0:c862449fe089 7 * -Zet alle PCF8574-Leds aan en geef terminal echo.
hainjedaf 0:c862449fe089 8 * -Zet alle PCF8574-Leds uit en geef terminal echo.
hainjedaf 0:c862449fe089 9 * -Zet led 2 aan ten teken 'Initialisatie Klaar' en geef terminal echo.
hainjedaf 0:c862449fe089 10 * -Als PCF8574-Knop# ingedrukt: PCF8574-Led# aan
hainjedaf 0:c862449fe089 11 * -Als PCF8574-Knop# losgelaten: PCF8574-Led# uit.
hainjedaf 0:c862449fe089 12 *
hainjedaf 0:c862449fe089 13 * Aanmaakdatum: 04 april 2016
hainjedaf 0:c862449fe089 14 *
hainjedaf 0:c862449fe089 15 * Geschreven door: Marout Yasuo Sluijter-Borms
hainjedaf 0:c862449fe089 16 *
hainjedaf 0:c862449fe089 17 * Copyright (c) 2016, MYSB, The Manhattan Project
hainjedaf 0:c862449fe089 18 * Zie einde programma / See end of program.
hainjedaf 0:c862449fe089 19 */
hainjedaf 0:c862449fe089 20
hainjedaf 0:c862449fe089 21 /* Libraries en classes insluiten */
hainjedaf 0:c862449fe089 22 #include "mbed.h"
hainjedaf 0:c862449fe089 23 #include "PCF8574.h"
hainjedaf 0:c862449fe089 24
hainjedaf 0:c862449fe089 25 /* Definieer seriële poorten */
hainjedaf 0:c862449fe089 26 Serial pc(USBTX, USBRX); // tx, rx communicatie met PC terminal via USB.
hainjedaf 0:c862449fe089 27 I2C i2c_bus( p9, p10); // I2C bus.
hainjedaf 0:c862449fe089 28 PCF8574 pcf0( p9, p10, 0x70); // Eerste PCF8574 chip
hainjedaf 0:c862449fe089 29 PCF8574 pcf1( p9, p10, 0x72); // Tweede PCF8574 chip
hainjedaf 0:c862449fe089 30
hainjedaf 0:c862449fe089 31
hainjedaf 0:c862449fe089 32 /* Definieer digitale IO */
hainjedaf 0:c862449fe089 33 DigitalOut led(LED2); // Led 2 op mbed is signaal 'Initialisatie klaar'.
hainjedaf 0:c862449fe089 34
hainjedaf 0:c862449fe089 35 /* Definieer Analoge IO */
hainjedaf 0:c862449fe089 36
hainjedaf 0:c862449fe089 37 /* Definieer globale variabelen */
hainjedaf 0:c862449fe089 38 char DataIn; // Data ingelezen van PCF8574
hainjedaf 0:c862449fe089 39 char DataOut; // Data te schrijven naar PCF8574
hainjedaf 0:c862449fe089 40
hainjedaf 0:c862449fe089 41 /* Definieer globale constanten */
hainjedaf 0:c862449fe089 42 // const int chipaddress = 0x40; // Adres van de PCF8574
hainjedaf 0:c862449fe089 43 const int i2c_speed = 400000; // Bussnelheid 400kHz
hainjedaf 0:c862449fe089 44 const int baudrate = 38400; // Baudrate communicatie met terminal
hainjedaf 0:c862449fe089 45
hainjedaf 0:c862449fe089 46 /* Start hoofprogramma */
hainjedaf 0:c862449fe089 47
hainjedaf 0:c862449fe089 48 int main()
hainjedaf 0:c862449fe089 49 {
hainjedaf 0:c862449fe089 50 // pc.baud(baudrate); // stel baudrate in van usb serial
hainjedaf 0:c862449fe089 51 pc.printf("\x1B\x48\x1B\x4A\r"); // scherm schoon en cursor linksboven
hainjedaf 0:c862449fe089 52 pc.printf("PCF8574A als bidirectionele IO\n\r");
hainjedaf 0:c862449fe089 53
hainjedaf 0:c862449fe089 54 i2c_bus.frequency( i2c_speed); // Zet de I2C bus op 400kHz
hainjedaf 0:c862449fe089 55
hainjedaf 0:c862449fe089 56 pc.printf("Zet I2C speed op %d Hz.\n\r", i2c_speed); // echo naar de terminal
hainjedaf 0:c862449fe089 57
hainjedaf 0:c862449fe089 58 while (1)
hainjedaf 0:c862449fe089 59 {
hainjedaf 0:c862449fe089 60 DataOut = 0xF0;
hainjedaf 0:c862449fe089 61 // pcf0.write(DataOut);
hainjedaf 0:c862449fe089 62 DataIn = pcf0.read(); // lees eerste chip uit
hainjedaf 0:c862449fe089 63 pc.printf("Waaarde van inputs: %d.\r\n", DataIn); // echo gelezen data naar terminal
hainjedaf 0:c862449fe089 64 wait ( 0.2);
hainjedaf 0:c862449fe089 65 DataOut = DataIn >> 4; // Shift DataIn 4 plaatsen rechts
hainjedaf 0:c862449fe089 66 pc.printf("Waaarde van outputs: %d.\r\n", DataOut); // echo gemodificeerde data naar terminal
hainjedaf 0:c862449fe089 67 wait ( 0.2);
hainjedaf 0:c862449fe089 68 pcf0.write(DataOut);
hainjedaf 0:c862449fe089 69 } // endwhile
hainjedaf 0:c862449fe089 70
hainjedaf 0:c862449fe089 71 } // endmain
hainjedaf 0:c862449fe089 72
hainjedaf 0:c862449fe089 73 /*
hainjedaf 0:c862449fe089 74 * Permission is hereby granted, free of charge, to any person obtaining a copy
hainjedaf 0:c862449fe089 75 * of this software and associated documentation files (the "Software"), to deal
hainjedaf 0:c862449fe089 76 * in the Software without restriction, including without limitation the rights
hainjedaf 0:c862449fe089 77 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hainjedaf 0:c862449fe089 78 * copies of the Software, and to permit persons to whom the Software is
hainjedaf 0:c862449fe089 79 * furnished to do so, subject to the following conditions:
hainjedaf 0:c862449fe089 80 *
hainjedaf 0:c862449fe089 81 * The above copyright notice and this permission notice shall be included in
hainjedaf 0:c862449fe089 82 * all copies or substantial portions of the Software.
hainjedaf 0:c862449fe089 83 *
hainjedaf 0:c862449fe089 84 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hainjedaf 0:c862449fe089 85 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hainjedaf 0:c862449fe089 86 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hainjedaf 0:c862449fe089 87 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hainjedaf 0:c862449fe089 88 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hainjedaf 0:c862449fe089 89 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hainjedaf 0:c862449fe089 90 * THE SOFTWARE.
hainjedaf 0:c862449fe089 91 */