lorenzo cervelli / Mbed 2 deprecated DisplayTemperature_Max7219-Max6675_SD

A program to measure the temperature using the Max6675 board. The temperature is shown on 8x8 Max7219 matrix display and it is saved on SD as well.

Dependencies:   MAX7219 SDFileSystem mbed

Fork of MAXREFDES99_demo by Maxim Integrated

The program measures the temperature using the Max6675 board designed for Arduino. The temperature is shown on Max7219 8x8 matrix display (designed for Arduino as well) as text marque from right to left. The fonf size is 5x7 so the last row is used to show some info:

- All leds off: Normal temperature measuring - Leds shifting: Saving on SD card - Leds blinking: SD card missing or damaged

The Blue "user button" is used to save measured temperature on SD card. First click start saving, the second stop the process. Together the temperature is saved also the time. The time is reset when the process start. Connecting the USB to PC it's possible to see instant temperature and all saved data on SD.

main.cpp@0:6b0161c3e440, 2016-01-12 (annotated)

Committer:
j3
Date:
Tue Jan 12 23:44:43 2016 +0000
Revision:
0:6b0161c3e440
Child:
3:41bdbc9b3cec
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
j3 0:6b0161c3e440 1 /***********************************************************************
j3 0:6b0161c3e440 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
j3 0:6b0161c3e440 3 *
j3 0:6b0161c3e440 4 * Permission is hereby granted, free of charge, to any person obtaining a
j3 0:6b0161c3e440 5 * copy of this software and associated documentation files (the "Software"),
j3 0:6b0161c3e440 6 * to deal in the Software without restriction, including without limitation
j3 0:6b0161c3e440 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
j3 0:6b0161c3e440 8 * and/or sell copies of the Software, and to permit persons to whom the
j3 0:6b0161c3e440 9 * Software is furnished to do so, subject to the following conditions:
j3 0:6b0161c3e440 10 *
j3 0:6b0161c3e440 11 * The above copyright notice and this permission notice shall be included
j3 0:6b0161c3e440 12 * in all copies or substantial portions of the Software.
j3 0:6b0161c3e440 13 *
j3 0:6b0161c3e440 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
j3 0:6b0161c3e440 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
j3 0:6b0161c3e440 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
j3 0:6b0161c3e440 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
j3 0:6b0161c3e440 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
j3 0:6b0161c3e440 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
j3 0:6b0161c3e440 20 * OTHER DEALINGS IN THE SOFTWARE.
j3 0:6b0161c3e440 21 *
j3 0:6b0161c3e440 22 * Except as contained in this notice, the name of Maxim Integrated
j3 0:6b0161c3e440 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
j3 0:6b0161c3e440 24 * Products, Inc. Branding Policy.
j3 0:6b0161c3e440 25 *
j3 0:6b0161c3e440 26 * The mere transfer of this software does not imply any licenses
j3 0:6b0161c3e440 27 * of trade secrets, proprietary technology, copyrights, patents,
j3 0:6b0161c3e440 28 * trademarks, maskwork rights, or any other form of intellectual
j3 0:6b0161c3e440 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
j3 0:6b0161c3e440 30 * ownership rights.
j3 0:6b0161c3e440 31 **********************************************************************/
j3 0:6b0161c3e440 32
j3 0:6b0161c3e440 33
j3 0:6b0161c3e440 34 #include "maxrefdes99.h"
j3 0:6b0161c3e440 35
j3 0:6b0161c3e440 36
j3 0:6b0161c3e440 37 int main(void)
j3 0:6b0161c3e440 38 {
j3 0:6b0161c3e440 39 Max7219 display(D11, D12, D13, D10);
j3 0:6b0161c3e440 40
j3 0:6b0161c3e440 41 //struct for holding MAX7219 configuration data
j3 0:6b0161c3e440 42 max7219_configuration_t display_config;
j3 0:6b0161c3e440 43
j3 0:6b0161c3e440 44 //configuration data
j3 0:6b0161c3e440 45 display_config.decode_mode = 0; //no BCD decode
j3 0:6b0161c3e440 46 display_config.intensity = 0x0F; //max intensity
j3 0:6b0161c3e440 47 display_config.scan_limit = 0x07; //scan all digits
j3 0:6b0161c3e440 48
j3 0:6b0161c3e440 49 //set number of MAX7219 devices being used
j3 0:6b0161c3e440 50 display.set_num_devices(4);
j3 0:6b0161c3e440 51
j3 0:6b0161c3e440 52 //config display
j3 0:6b0161c3e440 53 display.init_display(display_config);
j3 0:6b0161c3e440 54
j3 0:6b0161c3e440 55 //ensure all data registers are 0
j3 0:6b0161c3e440 56 display.display_all_off();
j3 0:6b0161c3e440 57
j3 0:6b0161c3e440 58 display.enable_display();
j3 0:6b0161c3e440 59
j3 0:6b0161c3e440 60 uint32_t user_input = 0; //
j3 0:6b0161c3e440 61 uint32_t shift_right;
j3 0:6b0161c3e440 62 char user_char;
j3 0:6b0161c3e440 63 char *p_str;
j3 0:6b0161c3e440 64
j3 0:6b0161c3e440 65 while(user_input != 9)
j3 0:6b0161c3e440 66 {
j3 0:6b0161c3e440 67 user_input = print_menu();
j3 0:6b0161c3e440 68
j3 0:6b0161c3e440 69 switch(user_input)
j3 0:6b0161c3e440 70 {
j3 0:6b0161c3e440 71 case 1:
j3 0:6b0161c3e440 72
j3 0:6b0161c3e440 73 user_input = get_user_input("\nPlease enter a value from 0 to 15: ", 15);
j3 0:6b0161c3e440 74
j3 0:6b0161c3e440 75 printf("\nUpdating display configuration...\n");
j3 0:6b0161c3e440 76
j3 0:6b0161c3e440 77 display_config.intensity = user_input;
j3 0:6b0161c3e440 78
j3 0:6b0161c3e440 79 display.init_display(display_config);
j3 0:6b0161c3e440 80
j3 0:6b0161c3e440 81 //make sure is good for next loop
j3 0:6b0161c3e440 82 user_input = 0;
j3 0:6b0161c3e440 83
j3 0:6b0161c3e440 84 break;
j3 0:6b0161c3e440 85
j3 0:6b0161c3e440 86 case 2:
j3 0:6b0161c3e440 87
j3 0:6b0161c3e440 88 user_input = get_user_input("\nPlease enter which position, 1 to 32: ", 32);
j3 0:6b0161c3e440 89
j3 0:6b0161c3e440 90 user_char = get_user_char("\nPlease enter an ASCII character from 'space' (0x20), to '~' (0x7E): ");
j3 0:6b0161c3e440 91
j3 0:6b0161c3e440 92 print_char(&display, user_input, user_char);
j3 0:6b0161c3e440 93
j3 0:6b0161c3e440 94 //make sure is good for next loop
j3 0:6b0161c3e440 95 user_input = 0;
j3 0:6b0161c3e440 96
j3 0:6b0161c3e440 97 break;
j3 0:6b0161c3e440 98
j3 0:6b0161c3e440 99 case 3:
j3 0:6b0161c3e440 100
j3 0:6b0161c3e440 101 user_input = get_user_input("\nPlease enter which position, 1 to 32: ", 32);
j3 0:6b0161c3e440 102
j3 0:6b0161c3e440 103 p_str = get_user_string("\nPlease enter a string less than 24 characters: ");
j3 0:6b0161c3e440 104
j3 0:6b0161c3e440 105 print_string(&display, user_input, p_str);
j3 0:6b0161c3e440 106
j3 0:6b0161c3e440 107 //make sure is good for next loop
j3 0:6b0161c3e440 108 user_input = 0;
j3 0:6b0161c3e440 109
j3 0:6b0161c3e440 110 break;
j3 0:6b0161c3e440 111
j3 0:6b0161c3e440 112 case 4:
j3 0:6b0161c3e440 113
j3 0:6b0161c3e440 114 user_input = get_user_input("\nPlease enter number of shifts, 1 to 32: ", 32);
j3 0:6b0161c3e440 115 shift_right = get_user_input("\nWhich direction? 0 for left, 1 for right.: ", 1);
j3 0:6b0161c3e440 116
j3 0:6b0161c3e440 117 if(shift_right)
j3 0:6b0161c3e440 118 {
j3 0:6b0161c3e440 119 printf("\nShifting Display Right %d positions\n", user_input);
j3 0:6b0161c3e440 120 shift_display_right(&display, user_input, 100);
j3 0:6b0161c3e440 121 }
j3 0:6b0161c3e440 122 else
j3 0:6b0161c3e440 123 {
j3 0:6b0161c3e440 124 printf("\nShifting Display Left %d positions\n", user_input);
j3 0:6b0161c3e440 125 shift_display_left(&display, user_input, 100);
j3 0:6b0161c3e440 126 }
j3 0:6b0161c3e440 127
j3 0:6b0161c3e440 128 break;
j3 0:6b0161c3e440 129
j3 0:6b0161c3e440 130 case 5:
j3 0:6b0161c3e440 131
j3 0:6b0161c3e440 132 all_off(&display);
j3 0:6b0161c3e440 133
j3 0:6b0161c3e440 134 break;
j3 0:6b0161c3e440 135
j3 0:6b0161c3e440 136 case 6:
j3 0:6b0161c3e440 137
j3 0:6b0161c3e440 138 printf("\nRunning Demo\n");
j3 0:6b0161c3e440 139 demo(&display, display_config, false);
j3 0:6b0161c3e440 140
j3 0:6b0161c3e440 141 break;
j3 0:6b0161c3e440 142
j3 0:6b0161c3e440 143 case 7:
j3 0:6b0161c3e440 144
j3 0:6b0161c3e440 145 printf("\nEntering Endless Loop\n");
j3 0:6b0161c3e440 146 demo(&display, display_config, true);
j3 0:6b0161c3e440 147
j3 0:6b0161c3e440 148 break;
j3 0:6b0161c3e440 149
j3 0:6b0161c3e440 150 case 8:
j3 0:6b0161c3e440 151
j3 0:6b0161c3e440 152 //blocking case, endless loop
j3 0:6b0161c3e440 153 shift_right = get_user_input("\nWhich direction? 0 for left, 1 for right.: ", 1);
j3 0:6b0161c3e440 154 endless_scroll_display(&display, shift_right);
j3 0:6b0161c3e440 155
j3 0:6b0161c3e440 156 break;
j3 0:6b0161c3e440 157
j3 0:6b0161c3e440 158 case 9:
j3 0:6b0161c3e440 159
j3 0:6b0161c3e440 160 printf("\nEnding Program\n");
j3 0:6b0161c3e440 161
j3 0:6b0161c3e440 162 break;
j3 0:6b0161c3e440 163
j3 0:6b0161c3e440 164 default:
j3 0:6b0161c3e440 165 printf("\nInvalid entry, please try again\n");
j3 0:6b0161c3e440 166 break;
j3 0:6b0161c3e440 167 }
j3 0:6b0161c3e440 168 }
j3 0:6b0161c3e440 169
j3 0:6b0161c3e440 170 return 0;
j3 0:6b0161c3e440 171 }