Marout Yasuo Sluijter-Borms / Mbed 2 deprecated SPI_4x7LED

4 digits 7-segement LED display multiplexed using 2x 74hc595. counts 0-F hex on each of the displays sequentially. Program can control up to 8 digits

Dependencies:   mbed

main.cpp@5:f16387ae15af, 2016-05-08 (annotated)

Committer:
hainjedaf
Date:
Sun May 08 15:55:21 2016 +0000
Revision:
5:f16387ae15af
Parent:
4:501f1e469bca 
Final version: 1-8 digits each counts 0-F in hex.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hainjedaf 0:f44d91c545d9 1 /* Naam:
hainjedaf 3:131580c6ef9c 2 * SPI_4x7LED
hainjedaf 0:f44d91c545d9 3 *
hainjedaf 0:f44d91c545d9 4 * Geschreven door:
hainjedaf 0:f44d91c545d9 5 * Marout Yasuo Sluijter-Borms
hainjedaf 0:f44d91c545d9 6 *
hainjedaf 0:f44d91c545d9 7 * Omschrijving:
hainjedaf 5:f16387ae15af 8 * 4 x 7 LED segmentdisplay en 2x 74hc595 schuifregister aansturen op de SPI bus
hainjedaf 5:f16387ae15af 9 * teller 0 tot 9999
hainjedaf 0:f44d91c545d9 10 *
hainjedaf 0:f44d91c545d9 11 * Aanmaakdatum:
hainjedaf 3:131580c6ef9c 12 * 5 mei 2016
hainjedaf 0:f44d91c545d9 13 * Laatste update:
hainjedaf 3:131580c6ef9c 14 * 7 mei 2016
hainjedaf 0:f44d91c545d9 15 *
hainjedaf 0:f44d91c545d9 16 * Revisie:
hainjedaf 4:501f1e469bca 17 * 1 - Ombouwen spi_led_helloworld
hainjedaf 3:131580c6ef9c 18 * 2 - Patroongenetator en digit selector geconstrueerd
hainjedaf 4:501f1e469bca 19 * 3 - Inversie van uitgangen
hainjedaf 4:501f1e469bca 20 * - MSB = DP, LSB = segment A
hainjedaf 0:f44d91c545d9 21 *
hainjedaf 0:f44d91c545d9 22 * Copyright (c) 2016, MYSB, The Manhattan Project
hainjedaf 0:f44d91c545d9 23 * Zie einde programma / See end of program.
hainjedaf 0:f44d91c545d9 24 */
hainjedaf 0:f44d91c545d9 25 /* Libraries en classes insluiten */
hainjedaf 0:f44d91c545d9 26 #include "mbed.h"
hainjedaf 0:f44d91c545d9 27
hainjedaf 3:131580c6ef9c 28 /* Definineer macros */
hainjedaf 3:131580c6ef9c 29 #define SPI_SPEED 48000000 // max speed
hainjedaf 3:131580c6ef9c 30 #define SPI_MOSI P0_9 // MOSI: p5 = P0_9
hainjedaf 3:131580c6ef9c 31 #define SPI_MISO P0_8 // MISO: p6 = P0_8
hainjedaf 3:131580c6ef9c 32 #define SPI_SCLK P0_7 // SCLK: p7 = P0_7
hainjedaf 3:131580c6ef9c 33 #define SPI_MODE 3 // Mode 3: CPOL = 1, CPHA= 1
hainjedaf 3:131580c6ef9c 34 #define REGISTER_WIDTH 8 // 8-bit register
hainjedaf 3:131580c6ef9c 35 #define REGISTER_COUNT 2 // aantal registers in serie
hainjedaf 4:501f1e469bca 36 #define DIGIT_COUNT 4 // aantal aan te sturen digits
hainjedaf 3:131580c6ef9c 37 #define SEGMENT_COUNT 7 // aantal segmenten per digit
hainjedaf 3:131580c6ef9c 38 #define DP_OUT 0x80 // register adres decimale punt (MSB = 128 = 0x80)
hainjedaf 3:131580c6ef9c 39 #define LED_ON_TIME 0.2 // tijd dat LED aan is
hainjedaf 3:131580c6ef9c 40
hainjedaf 1:a50c12484eb9 41 /* Declareer seriële poorten */
hainjedaf 3:131580c6ef9c 42 SPI spi0( SPI_MOSI, SPI_MISO, SPI_SCLK);
hainjedaf 3:131580c6ef9c 43 // Definieer SPI bus
hainjedaf 0:f44d91c545d9 44
hainjedaf 1:a50c12484eb9 45 /* Declareer digitale IO */
hainjedaf 2:c63fd1eaf215 46 DigitalOut ss0( P0_6, 1); // p8 = slave select 0, actief LAAG! Dus pin hoog om chip te deselecteren!
hainjedaf 0:f44d91c545d9 47
hainjedaf 1:a50c12484eb9 48 /* Declareer Analoge IO */
hainjedaf 1:a50c12484eb9 49 /* Declareer globale variabelen */
hainjedaf 5:f16387ae15af 50 int spi_data = 0x0000;
hainjedaf 3:131580c6ef9c 51
hainjedaf 1:a50c12484eb9 52 /* Declareer globale constanten */
hainjedaf 3:131580c6ef9c 53 const int digit[] = { // waarden om digits te selecteren (activeer een uitgang van schuifregister
hainjedaf 3:131580c6ef9c 54 0x01, 0x02, // #1, #2
hainjedaf 3:131580c6ef9c 55 0x04, 0x08, // #3, #4
hainjedaf 3:131580c6ef9c 56 0x10, 0x20, // #5, #6
hainjedaf 3:131580c6ef9c 57 0x40, 0x80 // #7, #8
hainjedaf 2:c63fd1eaf215 58 };
hainjedaf 4:501f1e469bca 59 const int decimalepunt = 0x80; // waarde van de decimale punt (DP = MSB)
hainjedaf 4:501f1e469bca 60 const int patroon[] = { // patroon om hexadecimaal digit te tonen (LSB a..g MSB-1, actief LAAG)
hainjedaf 4:501f1e469bca 61 0x40, 0x79, 0x24, 0x30, // 0, 1, 2, 3,
hainjedaf 4:501f1e469bca 62 0x19, 0x12, 0x02, 0x78, // 4, 5, 6, 7,
hainjedaf 4:501f1e469bca 63 0x00, 0x10, 0x08, 0x03, // 8, 9, A, B,
hainjedaf 4:501f1e469bca 64 0x46, 0x21, 0x06, 0x0E // C, D, E, F
hainjedaf 3:131580c6ef9c 65 };
hainjedaf 3:131580c6ef9c 66 const int patroon_aantal = ( // aantal patronen in patroon
hainjedaf 3:131580c6ef9c 67 sizeof( patroon) /
hainjedaf 3:131580c6ef9c 68 sizeof (patroon[0])
hainjedaf 3:131580c6ef9c 69 );
hainjedaf 2:c63fd1eaf215 70
hainjedaf 1:a50c12484eb9 71 /* Declareer functies */
hainjedaf 0:f44d91c545d9 72 /* Start hoofprogramma */
hainjedaf 0:f44d91c545d9 73 int main()
hainjedaf 0:f44d91c545d9 74 {
hainjedaf 2:c63fd1eaf215 75 // intellen SPI bus
hainjedaf 2:c63fd1eaf215 76 spi0.frequency( SPI_SPEED); // Snelheid bus instellen
hainjedaf 3:131580c6ef9c 77 spi0.format( REGISTER_WIDTH * REGISTER_COUNT, SPI_MODE);
hainjedaf 2:c63fd1eaf215 78 // SPI mode instellen;
hainjedaf 2:c63fd1eaf215 79
hainjedaf 2:c63fd1eaf215 80 /* maak schuifregisters leeg */
hainjedaf 3:131580c6ef9c 81 ss0 = 0; // selecteer chip
hainjedaf 5:f16387ae15af 82 spi0.write( 0); // Schrijf leeg byte naar chip
hainjedaf 3:131580c6ef9c 83 ss0 = 1; // deselecteer chip
hainjedaf 4:501f1e469bca 84 wait( LED_ON_TIME); // wacht even
hainjedaf 2:c63fd1eaf215 85 /* Schijf patroon naar register */
hainjedaf 2:c63fd1eaf215 86 while(1) {
hainjedaf 3:131580c6ef9c 87 spi_data = 0x0000;
hainjedaf 4:501f1e469bca 88 for( int d = 0; d < DIGIT_COUNT; ++d) {
hainjedaf 3:131580c6ef9c 89 // selecteer digit
hainjedaf 3:131580c6ef9c 90 for( int v = 0; v < patroon_aantal; ++v) {
hainjedaf 3:131580c6ef9c 91 // selekteer segment
hainjedaf 3:131580c6ef9c 92 spi_data = digit[d];
hainjedaf 3:131580c6ef9c 93 // laad patroon om digit te selecteren
hainjedaf 4:501f1e469bca 94 spi_data <<= 8; // schuif digit naar MSB
hainjedaf 3:131580c6ef9c 95 spi_data += patroon[v];
hainjedaf 4:501f1e469bca 96 // voeg patroon om segmenten te selecteren toe
hainjedaf 4:501f1e469bca 97 // write
hainjedaf 3:131580c6ef9c 98 ss0 = 0; // selekteer chip
hainjedaf 3:131580c6ef9c 99 spi0.write( spi_data);
hainjedaf 3:131580c6ef9c 100 // schrijf data naar bus
hainjedaf 3:131580c6ef9c 101 ss0 = 1; // deselecteer chip
hainjedaf 3:131580c6ef9c 102 wait( LED_ON_TIME); // wacht even
hainjedaf 3:131580c6ef9c 103 } // endfor
hainjedaf 3:131580c6ef9c 104 } // endfor
hainjedaf 2:c63fd1eaf215 105 }; // enwhile
hainjedaf 2:c63fd1eaf215 106 }; // endmain
hainjedaf 0:f44d91c545d9 107 /*
hainjedaf 0:f44d91c545d9 108 * Permission is hereby granted, free of charge, to any person obtaining a copy
hainjedaf 0:f44d91c545d9 109 * of this software and associated documentation files (the "Software"), to deal
hainjedaf 0:f44d91c545d9 110 * in the Software without restriction, including without limitation the rights
hainjedaf 0:f44d91c545d9 111 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hainjedaf 0:f44d91c545d9 112 * copies of the Software, and to permit persons to whom the Software is
hainjedaf 0:f44d91c545d9 113 * furnished to do so, subject to the following conditions:
hainjedaf 0:f44d91c545d9 114 *
hainjedaf 0:f44d91c545d9 115 * The above copyright notice and this permission notice shall be included in
hainjedaf 0:f44d91c545d9 116 * all copies or substantial portions of the Software.
hainjedaf 0:f44d91c545d9 117 *
hainjedaf 0:f44d91c545d9 118 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hainjedaf 0:f44d91c545d9 119 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hainjedaf 0:f44d91c545d9 120 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hainjedaf 0:f44d91c545d9 121 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hainjedaf 0:f44d91c545d9 122 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hainjedaf 0:f44d91c545d9 123 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hainjedaf 0:f44d91c545d9 124 * THE SOFTWARE.
hainjedaf 0:f44d91c545d9 125 */