Fredric Rice / Mbed 2 deprecated DemoKeypadMoorseCodeUnlockTouchAndButton

This is a demonstration program which draws a keypad on the LCD and uses the touch screen to allow an operator to key-in an access code. Two possible codes are allowed to grant to different levels of access. Additionally the push button is used to allow an operator to send Moorse Code pulses in to the device which is checked against two characters to determine if there was a match, and if so, access is granted.

Dependencies:   LCD_DISCO_F429ZI mbed TS_DISCO_F429ZI mbed-os BSP_DISCO_F429ZI

Also draws a mushroom on the screen and animates it.

SecurityUnlockDemo-Main.cpp@3:0e554d8d5a19, 2019-06-03 (annotated)

Committer:
Damotclese
Date:
Mon Jun 03 21:56:36 2019 +0000
Revision:
3:0e554d8d5a19
Parent:
1:316582aec4fb
Child:
5:5c507689ae66
When the keypad keys are touched, they flash YELLOW for a quarter of a second now;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Damotclese 0:04d4cc695e56 1
Damotclese 0:04d4cc695e56 2 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 3 // SecurityUnlockDemo-Main.cpp
Damotclese 0:04d4cc695e56 4 //
Damotclese 1:316582aec4fb 5 // Fredric L. Rice, June 2019
Damotclese 0:04d4cc695e56 6 //
Damotclese 0:04d4cc695e56 7 // This is a demonstration of how to build a keypad on the liquid
Damotclese 0:04d4cc695e56 8 // crystal display and then use the touch screen as a keypad to enter
Damotclese 0:04d4cc695e56 9 // an access code which grants access to other functionality. Two
Damotclese 0:04d4cc695e56 10 // levels of access is possible, with the more permissive access a
Damotclese 0:04d4cc695e56 11 // longer series of digits than the lesser-permissive access code.
Damotclese 0:04d4cc695e56 12 //
Damotclese 0:04d4cc695e56 13 // The keypad is built using position information in a table with some
Damotclese 0:04d4cc695e56 14 // fairly easy ways to move the keypad around on the display.
Damotclese 0:04d4cc695e56 15 //
Damotclese 0:04d4cc695e56 16 // The demonstration code also allows for the push button to be used
Damotclese 0:04d4cc695e56 17 // to key in Moorse Code pulses which are timed and then checked to
Damotclese 0:04d4cc695e56 18 // see if they match an expected access code for Moorse access.
Damotclese 0:04d4cc695e56 19 //
Damotclese 0:04d4cc695e56 20 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 21
Damotclese 1:316582aec4fb 22 #include "mbed.h" // The mbed operating system
Damotclese 1:316582aec4fb 23 #include "LCD_DISCO_F429ZI.h" // For controlling the LCD
Damotclese 1:316582aec4fb 24 #include "TS_DISCO_F429ZI.h" // For controlling the touch screen
Damotclese 1:316582aec4fb 25 #include "SecurityUnlockDemo-Main.h" // Always include our own header
Damotclese 1:316582aec4fb 26 #include "SecurityUnlockDemo-Keypad.h" // For all of the keypad functionality
Damotclese 1:316582aec4fb 27 #include "SecurityUnlockDemo-Moorse.h" // For all of the Moorse Code functionality
Damotclese 1:316582aec4fb 28 #include "SecurityUnlockDemo-Animation.h" // For performing animation
Damotclese 0:04d4cc695e56 29
Damotclese 0:04d4cc695e56 30 // ----------------------------------------------------------------------
Damotclese 1:316582aec4fb 31 // Define global data storage which we will export
Damotclese 0:04d4cc695e56 32 //
Damotclese 0:04d4cc695e56 33 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 34
Damotclese 0:04d4cc695e56 35 // We will be using the LCD so instantiate an object locally
Damotclese 1:316582aec4fb 36 LCD_DISCO_F429ZI st_lcd;
Damotclese 0:04d4cc695e56 37
Damotclese 0:04d4cc695e56 38 // We will be using the touch screen so instantiate an object
Damotclese 1:316582aec4fb 39 TS_DISCO_F429ZI st_touchScreen;
Damotclese 0:04d4cc695e56 40
Damotclese 1:316582aec4fb 41 // ----------------------------------------------------------------------
Damotclese 1:316582aec4fb 42 // Local data storage this module will hold
Damotclese 1:316582aec4fb 43 //
Damotclese 1:316582aec4fb 44 // ----------------------------------------------------------------------
Damotclese 1:316582aec4fb 45
Damotclese 1:316582aec4fb 46 // Because the mbed randomizer is not very good, we maintain the
Damotclese 1:316582aec4fb 47 // following counter which is incremented every time the main
Damotclese 1:316582aec4fb 48 // thread executes so that we can use it to assist in randoming
Damotclese 1:316582aec4fb 49 // our numbers for the animation
Damotclese 1:316582aec4fb 50 static uint32_t u32_randomSeeder;
Damotclese 0:04d4cc695e56 51
Damotclese 3:0e554d8d5a19 52 // We keep track of what access level we may have granted
Damotclese 3:0e554d8d5a19 53 static uint8_t u8_thisAccessLevel;
Damotclese 3:0e554d8d5a19 54
Damotclese 0:04d4cc695e56 55 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 56 // MainInit()
Damotclese 0:04d4cc695e56 57 //
Damotclese 0:04d4cc695e56 58 // This function will:
Damotclese 0:04d4cc695e56 59 // o Initialize the module's locally-held data
Damotclese 0:04d4cc695e56 60 // o Clear the LCD and set the display to WHITE
Damotclese 0:04d4cc695e56 61 // o Set the default character font size
Damotclese 0:04d4cc695e56 62 // o Initialize the touch screen by polling the size of the LCD
Damotclese 0:04d4cc695e56 63 // o Sets the push button to have no pull-up
Damotclese 0:04d4cc695e56 64 //
Damotclese 0:04d4cc695e56 65 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 66 static void MainInit(void)
Damotclese 0:04d4cc695e56 67 {
Damotclese 1:316582aec4fb 68 // Initialize locally-held data
Damotclese 3:0e554d8d5a19 69 u32_randomSeeder = 0;
Damotclese 3:0e554d8d5a19 70 u8_thisAccessLevel = 0;
Damotclese 0:04d4cc695e56 71
Damotclese 1:316582aec4fb 72 uint8_t u8_TouchScreenStatus = 0;
Damotclese 1:316582aec4fb 73
Damotclese 0:04d4cc695e56 74 // Bring the LCD up
Damotclese 0:04d4cc695e56 75 st_lcd.Clear(LCD_COLOR_WHITE);
Damotclese 0:04d4cc695e56 76
Damotclese 0:04d4cc695e56 77 // Set the default font size
Damotclese 0:04d4cc695e56 78 BSP_LCD_SetFont(&Font16);
Damotclese 0:04d4cc695e56 79
Damotclese 0:04d4cc695e56 80 // Initialize the touch screen
Damotclese 0:04d4cc695e56 81 u8_TouchScreenStatus = st_touchScreen.Init(st_lcd.GetXSize(), st_lcd.GetYSize());
Damotclese 0:04d4cc695e56 82
Damotclese 0:04d4cc695e56 83 if (TS_OK != u8_TouchScreenStatus)
Damotclese 0:04d4cc695e56 84 {
Damotclese 0:04d4cc695e56 85 st_lcd.DisplayStringAt(1, LINE(ENTERED_KEYS_LINE),
Damotclese 0:04d4cc695e56 86 (uint8_t *)"Touch screen failed", CENTER_MODE);
Damotclese 0:04d4cc695e56 87 }
Damotclese 0:04d4cc695e56 88 }
Damotclese 0:04d4cc695e56 89
Damotclese 0:04d4cc695e56 90 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 91 // MainGrantAccess()
Damotclese 0:04d4cc695e56 92 //
Damotclese 0:04d4cc695e56 93 // This function is invoked to display what access level has been
Damotclese 0:04d4cc695e56 94 // granted.
Damotclese 0:04d4cc695e56 95 //
Damotclese 0:04d4cc695e56 96 // ----------------------------------------------------------------------
Damotclese 1:316582aec4fb 97 void MainGrantAccess(uint8_t u8_thisAccessLevel)
Damotclese 0:04d4cc695e56 98 {
Damotclese 0:04d4cc695e56 99 uint8_t au8_reportString[21] = { 0 };
Damotclese 0:04d4cc695e56 100
Damotclese 0:04d4cc695e56 101 // Clear the display
Damotclese 0:04d4cc695e56 102 st_lcd.Clear(LCD_COLOR_WHITE);
Damotclese 0:04d4cc695e56 103
Damotclese 0:04d4cc695e56 104 // Build a report to offer
Damotclese 0:04d4cc695e56 105 (void)sprintf((char *)au8_reportString, "Level %u", u8_thisAccessLevel);
Damotclese 0:04d4cc695e56 106
Damotclese 0:04d4cc695e56 107 // Display the level of access that was granted
Damotclese 0:04d4cc695e56 108 st_lcd.DisplayStringAt(1, LINE(1), (uint8_t *)"Access granted", CENTER_MODE);
Damotclese 0:04d4cc695e56 109 st_lcd.DisplayStringAt(1, LINE(2), au8_reportString, CENTER_MODE);
Damotclese 0:04d4cc695e56 110 st_lcd.DisplayStringAt(1, LINE(3), (uint8_t *)"Press RESET to exit", CENTER_MODE);
Damotclese 0:04d4cc695e56 111
Damotclese 1:316582aec4fb 112 // Perform the screen animation
Damotclese 1:316582aec4fb 113 AnimationPerformAnimation(u32_randomSeeder);
Damotclese 3:0e554d8d5a19 114
Damotclese 3:0e554d8d5a19 115 // Flag the fact that we have granted access already
Damotclese 3:0e554d8d5a19 116 uint8_t u8_accessLevelGranted = u8_thisAccessLevel;
Damotclese 0:04d4cc695e56 117 }
Damotclese 0:04d4cc695e56 118
Damotclese 0:04d4cc695e56 119 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 120 // MainThread()
Damotclese 0:04d4cc695e56 121 //
Damotclese 0:04d4cc695e56 122 // Called ten times a second.
Damotclese 0:04d4cc695e56 123 //
Damotclese 0:04d4cc695e56 124 // This function will:
Damotclese 0:04d4cc695e56 125 // o Get the state of the touch screen
Damotclese 0:04d4cc695e56 126 // o Check to see if a touch screen touch was detected
Damotclese 0:04d4cc695e56 127 // o Extract the X and Y coordinates of the screen touch
Damotclese 0:04d4cc695e56 128 // o Call a function which will handle the screen touch
Damotclese 0:04d4cc695e56 129 // o Call a function to monitor the push button to drive the
Damotclese 0:04d4cc695e56 130 // Moorse Code access functionality
Damotclese 0:04d4cc695e56 131 //
Damotclese 0:04d4cc695e56 132 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 133 static void MainThread(void)
Damotclese 0:04d4cc695e56 134 {
Damotclese 0:04d4cc695e56 135 uint16_t u16_screenX = 0;
Damotclese 0:04d4cc695e56 136 uint16_t u16_screenY = 0;
Damotclese 0:04d4cc695e56 137 TS_StateTypeDef st_touchScreenState;
Damotclese 0:04d4cc695e56 138
Damotclese 3:0e554d8d5a19 139 // Have we not offered access already?
Damotclese 3:0e554d8d5a19 140 if (0 == u8_thisAccessLevel)
Damotclese 0:04d4cc695e56 141 {
Damotclese 3:0e554d8d5a19 142 // Get the status of the Touch Screen interface
Damotclese 3:0e554d8d5a19 143 st_touchScreen.GetState(&st_touchScreenState);
Damotclese 0:04d4cc695e56 144
Damotclese 3:0e554d8d5a19 145 // Has the screen been touched?
Damotclese 3:0e554d8d5a19 146 if (st_touchScreenState.TouchDetected)
Damotclese 3:0e554d8d5a19 147 {
Damotclese 3:0e554d8d5a19 148 // It has been, extract the X and Y coordinates touched
Damotclese 3:0e554d8d5a19 149 u16_screenX = st_touchScreenState.X;
Damotclese 3:0e554d8d5a19 150 u16_screenY = st_touchScreenState.Y;
Damotclese 3:0e554d8d5a19 151
Damotclese 3:0e554d8d5a19 152 // Call the routine which handles the key press
Damotclese 3:0e554d8d5a19 153 KeypadHandleKeyPress(u16_screenX, u16_screenY);
Damotclese 3:0e554d8d5a19 154 }
Damotclese 0:04d4cc695e56 155
Damotclese 3:0e554d8d5a19 156 // Drive the Moorse Code access functionality, scanning the
Damotclese 3:0e554d8d5a19 157 // push button 10 times a second
Damotclese 3:0e554d8d5a19 158 MoorseScanPushButton();
Damotclese 3:0e554d8d5a19 159 }
Damotclese 0:04d4cc695e56 160
Damotclese 1:316582aec4fb 161 // Keep track of how many times this function has been called
Damotclese 1:316582aec4fb 162 // so that we can attempt to see the random generator
Damotclese 1:316582aec4fb 163 u32_randomSeeder++;
Damotclese 0:04d4cc695e56 164 }
Damotclese 0:04d4cc695e56 165
Damotclese 0:04d4cc695e56 166 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 167 // main()
Damotclese 0:04d4cc695e56 168 //
Damotclese 0:04d4cc695e56 169 // This is the main entry called by thembed operating system.
Damotclese 0:04d4cc695e56 170 //
Damotclese 0:04d4cc695e56 171 // This function will:
Damotclese 0:04d4cc695e56 172 // o Initialize this module
Damotclese 0:04d4cc695e56 173 // o Call the function that established the LCD screen and
Damotclese 0:04d4cc695e56 174 // draws the keypad
Damotclese 0:04d4cc695e56 175 // o Goes in to a forever loop that wakes up 10 times a second
Damotclese 0:04d4cc695e56 176 // o Calls a function which drives the main task which scans the
Damotclese 0:04d4cc695e56 177 // LCD touch screen for screen touches
Damotclese 0:04d4cc695e56 178 //
Damotclese 0:04d4cc695e56 179 // ----------------------------------------------------------------------
Damotclese 0:04d4cc695e56 180 int main(void)
Damotclese 0:04d4cc695e56 181 {
Damotclese 0:04d4cc695e56 182 // Perform local module initialization, if any
Damotclese 0:04d4cc695e56 183 MainInit();
Damotclese 0:04d4cc695e56 184
Damotclese 1:316582aec4fb 185 // Initialize the Keypad module
Damotclese 1:316582aec4fb 186 KeypadInit();
Damotclese 1:316582aec4fb 187
Damotclese 1:316582aec4fb 188 // Initialize the Moorse Code module
Damotclese 1:316582aec4fb 189 MoorseInit();
Damotclese 1:316582aec4fb 190
Damotclese 1:316582aec4fb 191 // Initialize the Animation module
Damotclese 1:316582aec4fb 192 AnimationInit();
Damotclese 1:316582aec4fb 193
Damotclese 0:04d4cc695e56 194 // When we start up we will draw the touch screen keypad
Damotclese 1:316582aec4fb 195 KeypadDrawKeypad();
Damotclese 0:04d4cc695e56 196
Damotclese 0:04d4cc695e56 197 // Enter in to a forever loop which wakes up once a second
Damotclese 0:04d4cc695e56 198 while (true)
Damotclese 0:04d4cc695e56 199 {
Damotclese 0:04d4cc695e56 200 // Sleep for a tenth of a second
Damotclese 0:04d4cc695e56 201 wait(0.1);
Damotclese 0:04d4cc695e56 202
Damotclese 0:04d4cc695e56 203 // Call the main process
Damotclese 0:04d4cc695e56 204 MainThread();
Damotclese 0:04d4cc695e56 205 }
Damotclese 0:04d4cc695e56 206 }
Damotclese 0:04d4cc695e56 207
Damotclese 0:04d4cc695e56 208 // End of file
Damotclese 0:04d4cc695e56 209