GroupA / Mbed 2 deprecated Lab_6_WaG

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Dependencies:   mbed

Fork of WaG by GroupA

display.cpp@22:09dd6977576b, 2018-03-08 (annotated)

Committer:
spm71
Date:
Thu Mar 08 17:16:18 2018 +0000
Revision:
22:09dd6977576b
Parent:
20:d23bcd97f2c5
Child:
23:3da1d39c1ae9
Final code rework

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 *
spm71 18:0e281922212c 4 * Assignment Name: Lab 5: WaG
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 *
spm71 18:0e281922212c 10 * Created: 03/01/2018
spm71 22:09dd6977576b 11 * Last Modified: 03/08/2018
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>
spm71 18:0e281922212c 20 #include "spi.h"
phn10 8:d8bc78bda829 21
spm71 14:be27f6e21a8a 22 //#define VERSION1
spm71 14:be27f6e21a8a 23 #define VERSION2
spm71 10:ae0a262ba48d 24
spm71 18:0e281922212c 25 extern SPI wag_spi;
spm71 18:0e281922212c 26 extern spi_cfg as1107;
phn10 8:d8bc78bda829 27
phn10 8:d8bc78bda829 28 /*
spm71 22:09dd6977576b 29 * void initial_setup(struct spi_cfg spi_obj);
phn10 8:d8bc78bda829 30 * Description: setup spi data length (in bit), spi frequency, set LED
phn10 8:d8bc78bda829 31 * display to normal operation, and set all display numbers
phn10 8:d8bc78bda829 32 * to 0.
phn10 8:d8bc78bda829 33 *
phn10 8:d8bc78bda829 34 * Inputs:
phn10 8:d8bc78bda829 35 * Parameters:
spm71 22:09dd6977576b 36 * struct spi_cfg spi_obj: spi_cfg object
phn10 8:d8bc78bda829 37 *
phn10 8:d8bc78bda829 38 * Outputs:
phn10 8:d8bc78bda829 39 * Returns: void
phn10 8:d8bc78bda829 40 */
spm71 20:d23bcd97f2c5 41 void initial_setup(struct spi_cfg spi_obj) {
spm71 20:d23bcd97f2c5 42 spi_obj.spi_ncs = 1;
phn10 8:d8bc78bda829 43
spm71 20:d23bcd97f2c5 44 spi_send(spi_obj, 0x0C01);
spm71 20:d23bcd97f2c5 45 spi_send(spi_obj, 0x090F);
spm71 20:d23bcd97f2c5 46 spi_send(spi_obj, 0x0F00);
spm71 20:d23bcd97f2c5 47 spi_send(spi_obj, 0x0A0F);
spm71 20:d23bcd97f2c5 48 spi_send(spi_obj, 0x0B04);
spm71 20:d23bcd97f2c5 49 spi_send(spi_obj, 0x0100);
spm71 20:d23bcd97f2c5 50 spi_send(spi_obj, 0x0200);
spm71 20:d23bcd97f2c5 51 spi_send(spi_obj, 0x0300);
spm71 20:d23bcd97f2c5 52 spi_send(spi_obj, 0x0400);
spm71 20:d23bcd97f2c5 53 spi_send(spi_obj, 0x0500);
phn10 8:d8bc78bda829 54 }
phn10 8:d8bc78bda829 55
spm71 10:ae0a262ba48d 56
spm71 10:ae0a262ba48d 57 #ifdef VERSION1
phn10 8:d8bc78bda829 58 /*
spm71 10:ae0a262ba48d 59 * void bin2bcd_array(int num);
spm71 13:8936b2f64aa2 60 * Description: Converts to BCD array using modulo method.
phn10 8:d8bc78bda829 61 *
phn10 8:d8bc78bda829 62 * Inputs:
phn10 8:d8bc78bda829 63 * Parameters:
spm71 13:8936b2f64aa2 64 * int num: number to push to display
spm71 13:8936b2f64aa2 65 char bcd[]: BCD array that will be written to
phn10 8:d8bc78bda829 66 * Globals:
phn10 8:d8bc78bda829 67 *
phn10 8:d8bc78bda829 68 * Outputs:
phn10 8:d8bc78bda829 69 * Returns: void
phn10 8:d8bc78bda829 70 */
spm71 10:ae0a262ba48d 71 void bin2bcd_array(int num, char bcd[]) {
spm71 13:8936b2f64aa2 72 int place = 0;
phn10 7:161fe3793ddb 73 while (num != 0) { //converts decimal input to decimal array using %mod
phn10 7:161fe3793ddb 74 int val = num % 10;
spm71 12:a947a6609a23 75 bcd[place] = val;
phn10 7:161fe3793ddb 76 num = num/10;
spm71 13:8936b2f64aa2 77 place++;
phn10 7:161fe3793ddb 78 }
phn10 7:161fe3793ddb 79 }
spm71 10:ae0a262ba48d 80 #endif
phn10 7:161fe3793ddb 81
spm71 10:ae0a262ba48d 82 #ifdef VERSION2
phn10 8:d8bc78bda829 83 /*
phn10 9:06c0d5737e5c 84 * void bin2bcd_array(int num);
phn10 9:06c0d5737e5c 85 * Description: converts a number from binary format to binary coded
phn10 9:06c0d5737e5c 86 * decimal array using sprintf() method
phn10 9:06c0d5737e5c 87 *
phn10 9:06c0d5737e5c 88 * Inputs:
phn10 9:06c0d5737e5c 89 * Parameters:
phn10 9:06c0d5737e5c 90 * int num: number in binary format
phn10 15:100321eb2aac 91 * char bcd[]: bcd (binary coded decimal) array
phn10 9:06c0d5737e5c 92 *
phn10 9:06c0d5737e5c 93 * Outputs:
phn10 9:06c0d5737e5c 94 * Returns: void
phn10 9:06c0d5737e5c 95 */
spm71 10:ae0a262ba48d 96 void bin2bcd_array(int num, char bcd[]) {
phn10 9:06c0d5737e5c 97 char tmp_array[4];
phn10 11:6751b9406142 98 char reverse_bcd[4];
phn10 11:6751b9406142 99 int last_index = 0;
phn10 9:06c0d5737e5c 100 int i = 0;
phn10 11:6751b9406142 101
phn10 11:6751b9406142 102 sprintf(tmp_array, "%d", num);
phn10 11:6751b9406142 103 for (i = 0; i < 4; i++) {
phn10 11:6751b9406142 104 bcd[i] = 0;
phn10 11:6751b9406142 105 reverse_bcd[i] = 0;
phn10 11:6751b9406142 106 }
phn10 11:6751b9406142 107
phn10 11:6751b9406142 108 while (last_index < 4 and tmp_array[last_index] != '\0') {
phn10 11:6751b9406142 109 reverse_bcd[last_index] = tmp_array[last_index] - '0';
phn10 11:6751b9406142 110 last_index++;
phn10 11:6751b9406142 111 }
phn10 11:6751b9406142 112
phn10 11:6751b9406142 113 // reverse the order to fit binary coded decimal
phn10 11:6751b9406142 114 for (i = 0; i < last_index; i++) {
phn10 11:6751b9406142 115 bcd[i] = reverse_bcd[last_index - 1 - i];
phn10 9:06c0d5737e5c 116 }
phn10 9:06c0d5737e5c 117 }
spm71 10:ae0a262ba48d 118 #endif
phn10 9:06c0d5737e5c 119
phn10 15:100321eb2aac 120 /*
phn10 15:100321eb2aac 121 * void send_command_to_display(char bcd[]);
phn10 15:100321eb2aac 122 * Description: send bcd[] array to the display driver to display number
phn10 15:100321eb2aac 123 * in the display
phn10 15:100321eb2aac 124 *
phn10 15:100321eb2aac 125 * Inputs:
phn10 15:100321eb2aac 126 * Parameters:
phn10 15:100321eb2aac 127 * char bcd[]: bcd (binary coded decimal) array
phn10 15:100321eb2aac 128 *
phn10 15:100321eb2aac 129 * Outputs:
phn10 15:100321eb2aac 130 * Returns: void
phn10 15:100321eb2aac 131 */
phn10 11:6751b9406142 132 void send_command_to_display(char bcd[]) {
phn10 11:6751b9406142 133 int command;
phn10 11:6751b9406142 134
phn10 11:6751b9406142 135
phn10 11:6751b9406142 136 for (int i = 1; i <= 4; i++) {
phn10 11:6751b9406142 137 command = 0;
phn10 11:6751b9406142 138 // command has following form: 0x0[place]0[value]
phn10 11:6751b9406142 139 // the value converted to int is 16 * 16 * place + value
phn10 11:6751b9406142 140 command = 16 * 16 * i + bcd[i - 1];
spm71 18:0e281922212c 141 spi_send(as1107, command);
phn10 11:6751b9406142 142 }
phn10 7:161fe3793ddb 143 }