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@7:4b81ed6da6ab, 2016-04-28 (annotated)

Committer:
pradipv
Date:
Thu Apr 28 08:46:24 2016 +0000
Revision:
7:4b81ed6da6ab
Parent:
6:00aabe967e51
Child:
8:a6a0c9e280ae
version 0.2 - Updated with note while using 16x16 fonts

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 #include "maxrefdes99.h"
j3 0:6b0161c3e440 34
j3 0:6b0161c3e440 35 int main(void)
j3 0:6b0161c3e440 36 {
j3 0:6b0161c3e440 37 Max7219 display(D11, D12, D13, D10);
j3 0:6b0161c3e440 38
j3 0:6b0161c3e440 39 //struct for holding MAX7219 configuration data
j3 0:6b0161c3e440 40 max7219_configuration_t display_config;
j3 0:6b0161c3e440 41
j3 0:6b0161c3e440 42 //configuration data
j3 0:6b0161c3e440 43 display_config.decode_mode = 0; //no BCD decode
j3 0:6b0161c3e440 44 display_config.intensity = 0x0F; //max intensity
j3 0:6b0161c3e440 45 display_config.scan_limit = 0x07; //scan all digits
j3 0:6b0161c3e440 46
j3 0:6b0161c3e440 47 //set number of MAX7219 devices being used
j3 0:6b0161c3e440 48 display.set_num_devices(4);
j3 0:6b0161c3e440 49
j3 0:6b0161c3e440 50 //config display
j3 0:6b0161c3e440 51 display.init_display(display_config);
j3 0:6b0161c3e440 52
j3 0:6b0161c3e440 53 //ensure all data registers are 0
j3 0:6b0161c3e440 54 display.display_all_off();
j3 0:6b0161c3e440 55
j3 0:6b0161c3e440 56 display.enable_display();
j3 0:6b0161c3e440 57
pradipv 3:41bdbc9b3cec 58 uint32_t user_input = 0,user_font = 0;
j3 0:6b0161c3e440 59 uint32_t shift_right;
j3 0:6b0161c3e440 60 char user_char;
j3 0:6b0161c3e440 61 char *p_str;
j3 0:6b0161c3e440 62
j3 0:6b0161c3e440 63 while(user_input != 9)
j3 0:6b0161c3e440 64 {
j3 0:6b0161c3e440 65 user_input = print_menu();
j3 0:6b0161c3e440 66
j3 0:6b0161c3e440 67 switch(user_input)
j3 0:6b0161c3e440 68 {
pradipv 3:41bdbc9b3cec 69
pradipv 3:41bdbc9b3cec 70 case 1:
pradipv 6:00aabe967e51 71 printf("\n 0: For 5x7 font");
pradipv 6:00aabe967e51 72 printf("\n 1: For 16x16 Aerial bold font");
pradipv 6:00aabe967e51 73 printf("\n 2: For 16x16 Manual font");
pradipv 6:00aabe967e51 74 user_font = get_user_input("\nPlease select font: ", 2);
pradipv 7:4b81ed6da6ab 75 if((user_font ==1)||(user_font ==2))
pradipv 6:00aabe967e51 76 printf("\nNote:Position option works only for 5x7 font\n");
pradipv 3:41bdbc9b3cec 77 break;
pradipv 3:41bdbc9b3cec 78
pradipv 3:41bdbc9b3cec 79 case 2:
j3 0:6b0161c3e440 80
j3 0:6b0161c3e440 81 user_input = get_user_input("\nPlease enter a value from 0 to 15: ", 15);
j3 0:6b0161c3e440 82
j3 0:6b0161c3e440 83 printf("\nUpdating display configuration...\n");
j3 0:6b0161c3e440 84
j3 0:6b0161c3e440 85 display_config.intensity = user_input;
j3 0:6b0161c3e440 86
j3 0:6b0161c3e440 87 display.init_display(display_config);
j3 0:6b0161c3e440 88
j3 0:6b0161c3e440 89 //make sure is good for next loop
j3 0:6b0161c3e440 90 user_input = 0;
j3 0:6b0161c3e440 91
j3 0:6b0161c3e440 92 break;
j3 0:6b0161c3e440 93
pradipv 3:41bdbc9b3cec 94 case 3:
pradipv 3:41bdbc9b3cec 95
pradipv 3:41bdbc9b3cec 96 if(user_font==0)
pradipv 3:41bdbc9b3cec 97 user_input = get_user_input("\nPlease enter which position, 1 to 32: ", 32);
pradipv 3:41bdbc9b3cec 98
pradipv 3:41bdbc9b3cec 99 user_char = get_user_char("\nPlease enter an ASCII character from '0' (zero) to 'z' (0x7A): ");
j3 0:6b0161c3e440 100
pradipv 3:41bdbc9b3cec 101 if(user_font==0)
pradipv 3:41bdbc9b3cec 102 print_char(&display, user_input, user_char);
pradipv 6:00aabe967e51 103 else if(user_font>=1)
pradipv 6:00aabe967e51 104 print_char_16x16(&display, 0, user_char,user_font);
pradipv 3:41bdbc9b3cec 105
j3 0:6b0161c3e440 106 //make sure is good for next loop
j3 0:6b0161c3e440 107 user_input = 0;
j3 0:6b0161c3e440 108
j3 0:6b0161c3e440 109 break;
j3 0:6b0161c3e440 110
pradipv 3:41bdbc9b3cec 111 case 4:
j3 0:6b0161c3e440 112
pradipv 3:41bdbc9b3cec 113 if(user_font==0)
pradipv 6:00aabe967e51 114 user_input = get_user_input("\nPlease enter which position 1 to 32: ", 32);
pradipv 3:41bdbc9b3cec 115
j3 0:6b0161c3e440 116 p_str = get_user_string("\nPlease enter a string less than 24 characters: ");
j3 0:6b0161c3e440 117
pradipv 3:41bdbc9b3cec 118 if(user_font==0)
pradipv 3:41bdbc9b3cec 119 print_string(&display, user_input, p_str);
pradipv 6:00aabe967e51 120 else if(user_font>=1)
pradipv 6:00aabe967e51 121 print_string_16x16(&display,p_str,user_font);
pradipv 3:41bdbc9b3cec 122
j3 0:6b0161c3e440 123 //make sure is good for next loop
j3 0:6b0161c3e440 124 user_input = 0;
j3 0:6b0161c3e440 125
j3 0:6b0161c3e440 126 break;
j3 0:6b0161c3e440 127
pradipv 3:41bdbc9b3cec 128 case 5:
j3 0:6b0161c3e440 129
pradipv 3:41bdbc9b3cec 130 if(user_font==0)
pradipv 3:41bdbc9b3cec 131 user_input = get_user_input("\nPlease enter number of shifts, 1 to 32: ", 32);
pradipv 6:00aabe967e51 132 else if(user_font>=1)
pradipv 3:41bdbc9b3cec 133 user_input = get_user_input("\nPlease enter number of shifts, 1 to 96: ", 96);
pradipv 3:41bdbc9b3cec 134
pradipv 3:41bdbc9b3cec 135 shift_right = get_user_input("\nWhich direction? 0 for left, 1 for right: ", 1);
j3 0:6b0161c3e440 136
j3 0:6b0161c3e440 137 if(shift_right)
j3 0:6b0161c3e440 138 {
j3 0:6b0161c3e440 139 printf("\nShifting Display Right %d positions\n", user_input);
pradipv 3:41bdbc9b3cec 140 if(user_font==0)
pradipv 3:41bdbc9b3cec 141 shift_display_right(&display, user_input, 100);
pradipv 6:00aabe967e51 142 else if(user_font>=1)
pradipv 3:41bdbc9b3cec 143 shift_display_right_16x16(&display, user_input, 100);
j3 0:6b0161c3e440 144 }
j3 0:6b0161c3e440 145 else
j3 0:6b0161c3e440 146 {
j3 0:6b0161c3e440 147 printf("\nShifting Display Left %d positions\n", user_input);
pradipv 3:41bdbc9b3cec 148 if(user_font==0)
pradipv 3:41bdbc9b3cec 149 shift_display_left(&display, user_input, 100);
pradipv 6:00aabe967e51 150 else if(user_font>=1)
pradipv 3:41bdbc9b3cec 151 shift_display_left_16x16(&display, user_input, 100);
pradipv 3:41bdbc9b3cec 152
j3 0:6b0161c3e440 153 }
j3 0:6b0161c3e440 154
j3 0:6b0161c3e440 155 break;
j3 0:6b0161c3e440 156
pradipv 3:41bdbc9b3cec 157 case 6:
j3 0:6b0161c3e440 158
j3 0:6b0161c3e440 159 all_off(&display);
j3 0:6b0161c3e440 160
j3 0:6b0161c3e440 161 break;
j3 0:6b0161c3e440 162
pradipv 3:41bdbc9b3cec 163 case 7:
j3 0:6b0161c3e440 164
j3 0:6b0161c3e440 165 printf("\nRunning Demo\n");
pradipv 3:41bdbc9b3cec 166 if(user_font==0)
pradipv 6:00aabe967e51 167 demo(&display, display_config, false);
pradipv 6:00aabe967e51 168 else if(user_font>=1)
pradipv 6:00aabe967e51 169 demo_16x16(&display, display_config, user_font,false);
j3 0:6b0161c3e440 170
j3 0:6b0161c3e440 171 break;
pradipv 3:41bdbc9b3cec 172
j3 0:6b0161c3e440 173 case 8:
j3 0:6b0161c3e440 174
j3 0:6b0161c3e440 175 //blocking case, endless loop
pradipv 3:41bdbc9b3cec 176 shift_right = get_user_input("\nWhich direction? 0 for left, 1 for right: ", 1);
pradipv 3:41bdbc9b3cec 177 if(user_font==0)
pradipv 6:00aabe967e51 178 endless_scroll_display(&display, shift_right);
pradipv 6:00aabe967e51 179 else if(user_font>=1)
pradipv 6:00aabe967e51 180 endless_scroll_display_16x16(&display, shift_right);
j3 0:6b0161c3e440 181
j3 0:6b0161c3e440 182 break;
j3 0:6b0161c3e440 183
j3 0:6b0161c3e440 184 case 9:
pradipv 3:41bdbc9b3cec 185 printf("\nEnding Program\n");
j3 0:6b0161c3e440 186 break;
j3 0:6b0161c3e440 187
j3 0:6b0161c3e440 188 default:
j3 0:6b0161c3e440 189 printf("\nInvalid entry, please try again\n");
j3 0:6b0161c3e440 190 break;
j3 0:6b0161c3e440 191 }
j3 0:6b0161c3e440 192 }
j3 0:6b0161c3e440 193 return 0;
j3 0:6b0161c3e440 194 }
pradipv 3:41bdbc9b3cec 195