GroupA / Mbed 2 deprecated Lab_6_WaG

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Dependencies:   mbed

Fork of WaG by GroupA

display.cpp@9:06c0d5737e5c, 2018-02-22 (annotated)

Committer:
phn10
Date:
Thu Feb 22 04:20:28 2018 +0000
Revision:
9:06c0d5737e5c
Parent:
8:d8bc78bda829
Child:
10:ae0a262ba48d
update the function bin2bcd_array() using sprinf() function

Who changed what in which revision?

UserRevisionLine numberNew contents of line
phn10 7:161fe3793ddb 1 /******************************************************************************
phn10 7:161fe3793ddb 2 * EECS 397
phn10 7:161fe3793ddb 3 *
phn10 7:161fe3793ddb 4 * Assignment Name: Lab 4: display_test2
phn10 7:161fe3793ddb 5 *
phn10 7:161fe3793ddb 6 * Authors: Sam Morrison and Phong Nguyen
phn10 7:161fe3793ddb 7 * File name: display.cpp
phn10 7:161fe3793ddb 8 * Purpose: Contain function definitions
phn10 7:161fe3793ddb 9 *
phn10 7:161fe3793ddb 10 * Created: 02/21/2018
phn10 7:161fe3793ddb 11 * Last Modified: 02/21/2018
phn10 7:161fe3793ddb 12 *
phn10 7:161fe3793ddb 13 ******************************************************************************/
phn10 8:d8bc78bda829 14 #include "mbed.h"
phn10 8:d8bc78bda829 15 #include "io_pins.h"
phn10 8:d8bc78bda829 16 #include "display.h"
phn10 8:d8bc78bda829 17 #include <stdlib.h>
phn10 8:d8bc78bda829 18 #include <stdio.h>
phn10 8:d8bc78bda829 19 #include <string.h>
phn10 8:d8bc78bda829 20
phn10 8:d8bc78bda829 21 int bcd[4];
phn10 8:d8bc78bda829 22
phn10 8:d8bc78bda829 23 /*
phn10 8:d8bc78bda829 24 * void initial_setup(DigitalOut SS, int data_length, int frequency);
phn10 8:d8bc78bda829 25 * Description: setup spi data length (in bit), spi frequency, set LED
phn10 8:d8bc78bda829 26 * display to normal operation, and set all display numbers
phn10 8:d8bc78bda829 27 * to 0.
phn10 8:d8bc78bda829 28 *
phn10 8:d8bc78bda829 29 * Inputs:
phn10 8:d8bc78bda829 30 * Parameters:
phn10 8:d8bc78bda829 31 * SPI spi: spi object
phn10 8:d8bc78bda829 32 * DigitalOut SS: chip select pin
phn10 8:d8bc78bda829 33 * int data_length: spi data length in bit
phn10 8:d8bc78bda829 34 * int frequency: frequency of SPI communication
phn10 8:d8bc78bda829 35 *
phn10 8:d8bc78bda829 36 * Outputs:
phn10 8:d8bc78bda829 37 * Returns: void
phn10 8:d8bc78bda829 38 */
phn10 8:d8bc78bda829 39 void initial_setup(DigitalOut SS, int data_length, int frequency) {
phn10 8:d8bc78bda829 40 SS = 1;
phn10 8:d8bc78bda829 41 spi.format(data_length, 0);
phn10 8:d8bc78bda829 42 spi.frequency(frequency);
phn10 8:d8bc78bda829 43
phn10 8:d8bc78bda829 44 SS = 0;
phn10 8:d8bc78bda829 45 spi.write(0x0C01); //normal operation
phn10 8:d8bc78bda829 46 SS = 1;
phn10 8:d8bc78bda829 47
phn10 8:d8bc78bda829 48 SS = 0;
phn10 8:d8bc78bda829 49 spi.write(0x090F); //decode to bits 0:3
phn10 8:d8bc78bda829 50 SS = 1;
phn10 8:d8bc78bda829 51
phn10 8:d8bc78bda829 52 SS = 0;
phn10 8:d8bc78bda829 53 spi.write(0x0F00); //set to normal mode
phn10 8:d8bc78bda829 54 SS = 1;
phn10 8:d8bc78bda829 55
phn10 8:d8bc78bda829 56 SS = 0;
phn10 8:d8bc78bda829 57 spi.write(0x0A0F); //intensity set to max
phn10 8:d8bc78bda829 58 SS = 1;
phn10 8:d8bc78bda829 59
phn10 8:d8bc78bda829 60 SS = 0;
phn10 8:d8bc78bda829 61 spi.write(0x0B04); //display digits 0:4
phn10 8:d8bc78bda829 62 SS = 1;
phn10 8:d8bc78bda829 63
phn10 8:d8bc78bda829 64 SS = 0;
phn10 8:d8bc78bda829 65 spi.write(0x0100); //set digit 1 to 0
phn10 8:d8bc78bda829 66 SS = 1;
phn10 8:d8bc78bda829 67
phn10 8:d8bc78bda829 68 SS = 0;
phn10 8:d8bc78bda829 69 spi.write(0x0200); //set digit 2 to 0
phn10 8:d8bc78bda829 70 SS = 1;
phn10 8:d8bc78bda829 71
phn10 8:d8bc78bda829 72 SS = 0;
phn10 8:d8bc78bda829 73 spi.write(0x0300); //set digit 3 to 0
phn10 8:d8bc78bda829 74 SS = 1;
phn10 8:d8bc78bda829 75
phn10 8:d8bc78bda829 76 SS = 0;
phn10 8:d8bc78bda829 77 spi.write(0x0400); //set digit 4 to 0
phn10 8:d8bc78bda829 78 SS = 1;
phn10 8:d8bc78bda829 79
phn10 8:d8bc78bda829 80 SS = 0;
phn10 8:d8bc78bda829 81 spi.write(0x0500); //set digit 5 to 0
phn10 8:d8bc78bda829 82 SS = 1;
phn10 8:d8bc78bda829 83 }
phn10 8:d8bc78bda829 84
phn10 8:d8bc78bda829 85 /*
phn10 8:d8bc78bda829 86 * void mod_bcd(int num);
phn10 8:d8bc78bda829 87 * Description:
phn10 8:d8bc78bda829 88 *
phn10 8:d8bc78bda829 89 * Inputs:
phn10 8:d8bc78bda829 90 * Parameters:
phn10 8:d8bc78bda829 91 * int num:
phn10 8:d8bc78bda829 92 * Globals:
phn10 8:d8bc78bda829 93 *
phn10 8:d8bc78bda829 94 * Outputs:
phn10 8:d8bc78bda829 95 * Parameters:
phn10 8:d8bc78bda829 96 * Globals:
phn10 8:d8bc78bda829 97 * Returns: void
phn10 8:d8bc78bda829 98 */
phn10 7:161fe3793ddb 99 void mod_bcd(int num) {
phn10 7:161fe3793ddb 100 int size = 4;
phn10 7:161fe3793ddb 101 int dec_arr[size];
phn10 7:161fe3793ddb 102 int place = 0;
phn10 7:161fe3793ddb 103 while (num != 0) { //converts decimal input to decimal array using %mod
phn10 7:161fe3793ddb 104 int val = num % 10;
phn10 7:161fe3793ddb 105 dec_arr[place] = val;
phn10 7:161fe3793ddb 106 num = num/10;
phn10 7:161fe3793ddb 107 place++;
phn10 7:161fe3793ddb 108 }
phn10 7:161fe3793ddb 109 for (int i = 0; i < size; i++) { //converts decimal array to binary array
phn10 7:161fe3793ddb 110 bcd[i] = convert(dec_arr[i]);
phn10 7:161fe3793ddb 111 }
phn10 7:161fe3793ddb 112 }
phn10 7:161fe3793ddb 113
phn10 8:d8bc78bda829 114 /*
phn10 8:d8bc78bda829 115 * int convert(int dec);
phn10 8:d8bc78bda829 116 * Description:
phn10 8:d8bc78bda829 117 *
phn10 8:d8bc78bda829 118 * Inputs:
phn10 8:d8bc78bda829 119 * Parameters:
phn10 8:d8bc78bda829 120 * int dec:
phn10 8:d8bc78bda829 121 * Globals:
phn10 8:d8bc78bda829 122 *
phn10 8:d8bc78bda829 123 * Outputs:
phn10 8:d8bc78bda829 124 * Parameters:
phn10 8:d8bc78bda829 125 * Globals:
phn10 8:d8bc78bda829 126 * Returns: void
phn10 8:d8bc78bda829 127 */
phn10 7:161fe3793ddb 128 int convert(int dec) {//convert decimal to binary
phn10 7:161fe3793ddb 129 if (dec == 0) //function complete
phn10 7:161fe3793ddb 130 return 0;
phn10 7:161fe3793ddb 131 else //recursive call until converted
phn10 7:161fe3793ddb 132 return (dec % 2 + 10 * convert(dec / 2));
phn10 7:161fe3793ddb 133 }
phn10 7:161fe3793ddb 134
phn10 8:d8bc78bda829 135 /*
phn10 9:06c0d5737e5c 136 * void bin2bcd_array(int num);
phn10 9:06c0d5737e5c 137 * Description: converts a number from binary format to binary coded
phn10 9:06c0d5737e5c 138 * decimal array using sprintf() method
phn10 9:06c0d5737e5c 139 *
phn10 9:06c0d5737e5c 140 * Inputs:
phn10 9:06c0d5737e5c 141 * Parameters:
phn10 9:06c0d5737e5c 142 * int num: number in binary format
phn10 9:06c0d5737e5c 143 * int &bcd: pointer to bcd (binary coded decimal) array
phn10 9:06c0d5737e5c 144 *
phn10 9:06c0d5737e5c 145 * Outputs:
phn10 9:06c0d5737e5c 146 * Returns: void
phn10 9:06c0d5737e5c 147 */
phn10 9:06c0d5737e5c 148 void bin2bcd_array(int num, int &bcd) {
phn10 9:06c0d5737e5c 149 char tmp_array[4];
phn10 9:06c0d5737e5c 150 sprintf(tmp_array, "%d", num);
phn10 9:06c0d5737e5c 151
phn10 9:06c0d5737e5c 152 int i = 0;
phn10 9:06c0d5737e5c 153 while (tmp_array[i] != '\0') {
phn10 9:06c0d5737e5c 154 bcd[3 - i] = tmp_array[i];
phn10 9:06c0d5737e5c 155 i++;
phn10 9:06c0d5737e5c 156 }
phn10 9:06c0d5737e5c 157 }
phn10 9:06c0d5737e5c 158
phn10 9:06c0d5737e5c 159
phn10 9:06c0d5737e5c 160 /*
phn10 8:d8bc78bda829 161 * char to_command(char input, int place);
phn10 8:d8bc78bda829 162 * Description:
phn10 8:d8bc78bda829 163 *
phn10 8:d8bc78bda829 164 * Inputs:
phn10 8:d8bc78bda829 165 * Parameters:
phn10 8:d8bc78bda829 166 * char input:
phn10 8:d8bc78bda829 167 * int place:
phn10 8:d8bc78bda829 168 * Globals:
phn10 8:d8bc78bda829 169 *
phn10 8:d8bc78bda829 170 * Outputs:
phn10 8:d8bc78bda829 171 * Parameters:
phn10 8:d8bc78bda829 172 * Globals:
phn10 8:d8bc78bda829 173 * Returns: char
phn10 8:d8bc78bda829 174 */
phn10 7:161fe3793ddb 175 char to_command(char input, int place) {
phn10 8:d8bc78bda829 176 return 'a';
phn10 7:161fe3793ddb 177 }