T Morgan / FRDM-KL46Z-Clock

FRDM-KL46Z clock based on Paul Staron's FRDM-KL46Z-LCD-rtc-demo. Uses the on-board touch slider to set hours, minutes and seconds.

Dependencies:   SLCD TSI mbed-src

Fork of FRDM-KL46Z LCD rtc Demo by Paul Staron

After the instructions have finished scrolling across the LCD, press SW3 to cycle between, SET_HOURS, SET_MINUTES, SET_SECONDS and SHOW_TIME modes.

In (e.g.) SET_HOURS mode, press the capacitive touch slider (TSI), releasing when the LCD shows the correct hour (24H clock).

main.cpp@2:46d52fa160b2, 2014-02-24 (annotated)

Committer:
tmorgan
Date:
Mon Feb 24 20:48:50 2014 +0000
Revision:
2:46d52fa160b2
Parent:
1:34f0bfc62803 
Initial release.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tmorgan 2:46d52fa160b2 1 /*
tmorgan 2:46d52fa160b2 2 * LCD code based on FRDM-KL46Z-LCD-rtc-Demo by Paul Staron.
tmorgan 2:46d52fa160b2 3 * Touch slider code based on serialSENS by Aaron Huang.
tmorgan 2:46d52fa160b2 4 */
star297 0:4f67859595b2 5 #include "mbed.h"
star297 0:4f67859595b2 6 #include "SLCD.h"
tmorgan 2:46d52fa160b2 7 #include "TSISensor.h"
star297 0:4f67859595b2 8
tmorgan 2:46d52fa160b2 9 // Peripherals
tmorgan 2:46d52fa160b2 10 SLCD sLCD;
tmorgan 2:46d52fa160b2 11 Serial pc(USBTX, USBRX);
tmorgan 2:46d52fa160b2 12 TSISensor tsi;
tmorgan 2:46d52fa160b2 13 DigitalOut greenLED(LED1);
tmorgan 2:46d52fa160b2 14 DigitalOut redLED(LED2);
tmorgan 2:46d52fa160b2 15 InterruptIn setModeSwitch (SW3);
tmorgan 2:46d52fa160b2 16
tmorgan 2:46d52fa160b2 17 // FUNCTION-MODES
tmorgan 2:46d52fa160b2 18 // In SET_HOURS mode, wait for slider touch to set hours, or SW3 press to enter SET_MINUTES mode.
tmorgan 2:46d52fa160b2 19 // In SET_MINUTES mode, wait for slider touch to set minutes, or SW3 press to enter SET_SECONDS mode.
tmorgan 2:46d52fa160b2 20 // In SET_SECONDS mode, wait for slider touch to set seconds, or SW3 press to enter SHOW_TIME mode.
tmorgan 2:46d52fa160b2 21 // In SHOW_TIME mode, advance display state every seconds, or, on SW3 press, enter SET_HOURS mode.
tmorgan 2:46d52fa160b2 22 #define SET_HOURS 0
tmorgan 2:46d52fa160b2 23 #define SET_MINUTES 1
tmorgan 2:46d52fa160b2 24 #define SET_SECONDS 2
tmorgan 2:46d52fa160b2 25 #define SHOW_TIME 3
tmorgan 2:46d52fa160b2 26 int function_mode;
tmorgan 2:46d52fa160b2 27
tmorgan 2:46d52fa160b2 28 // TIME-DISPLAY STATES
tmorgan 2:46d52fa160b2 29 // Show HH:MM from state SHOW_HHMM to state SHOW_SS,
tmorgan 2:46d52fa160b2 30 // Show :SS from state SHOW_SS to state SHOW_LOOP
tmorgan 2:46d52fa160b2 31 #define SHOW_HHMM 0
tmorgan 2:46d52fa160b2 32 #define SHOW_SS 5
tmorgan 2:46d52fa160b2 33 #define SHOW_LOOP 10
tmorgan 2:46d52fa160b2 34 int display_state;
tmorgan 2:46d52fa160b2 35
tmorgan 2:46d52fa160b2 36 char LCDbuffer[32];
tmorgan 2:46d52fa160b2 37
tmorgan 2:46d52fa160b2 38 // Scroll instructions across the LCD
tmorgan 2:46d52fa160b2 39 void scroll_message(void)
tmorgan 2:46d52fa160b2 40 {
tmorgan 2:46d52fa160b2 41 char message[60] = " Press SW3 and touch slider to set time ";
tmorgan 2:46d52fa160b2 42
tmorgan 2:46d52fa160b2 43 for (int start = 0; start < strlen(message) - 4; start++)
tmorgan 2:46d52fa160b2 44 {
tmorgan 2:46d52fa160b2 45 for (int digit = 0; digit < 4; digit++)
tmorgan 2:46d52fa160b2 46 sLCD.putc(message[start + digit]);
tmorgan 2:46d52fa160b2 47 wait(0.25);
tmorgan 2:46d52fa160b2 48 }
tmorgan 2:46d52fa160b2 49 }
star297 0:4f67859595b2 50
tmorgan 2:46d52fa160b2 51 // Set Real-time Clock HH:MM:SS
tmorgan 2:46d52fa160b2 52 void set_HHMMSS(int hours, int minutes, int seconds)
tmorgan 2:46d52fa160b2 53 {
tmorgan 2:46d52fa160b2 54 struct tm t;
tmorgan 2:46d52fa160b2 55
tmorgan 2:46d52fa160b2 56 if(hours > 23) hours = 0;
tmorgan 2:46d52fa160b2 57 if(minutes > 59) minutes = 0;
tmorgan 2:46d52fa160b2 58 t.tm_sec = seconds;
tmorgan 2:46d52fa160b2 59 t.tm_min = minutes;
tmorgan 2:46d52fa160b2 60 t.tm_hour = hours;
tmorgan 2:46d52fa160b2 61 t.tm_mday = 23;
tmorgan 2:46d52fa160b2 62 t.tm_mon = 2;
tmorgan 2:46d52fa160b2 63 t.tm_year = 114;
tmorgan 2:46d52fa160b2 64 set_time (mktime(&t));
tmorgan 2:46d52fa160b2 65 }
tmorgan 2:46d52fa160b2 66
tmorgan 2:46d52fa160b2 67 // Read Real-time Clock HH:MM:SS
tmorgan 2:46d52fa160b2 68 void get_HHMMSS(int *hours, int *minutes, int *seconds)
tmorgan 2:46d52fa160b2 69 {
tmorgan 2:46d52fa160b2 70 time_t rtcTime = time(NULL);
tmorgan 2:46d52fa160b2 71 struct tm *t = localtime(&rtcTime);
tmorgan 2:46d52fa160b2 72 *hours = t->tm_hour;
tmorgan 2:46d52fa160b2 73 *minutes = t->tm_min;
tmorgan 2:46d52fa160b2 74 *seconds = t->tm_sec;
tmorgan 2:46d52fa160b2 75 }
tmorgan 2:46d52fa160b2 76
tmorgan 2:46d52fa160b2 77 // On SW3 press, cycle between function-modes
tmorgan 2:46d52fa160b2 78 void setMode(void)
tmorgan 2:46d52fa160b2 79 {
tmorgan 2:46d52fa160b2 80 if (function_mode == SET_HOURS)
tmorgan 2:46d52fa160b2 81 function_mode = SET_MINUTES;
tmorgan 2:46d52fa160b2 82 else if (function_mode == SET_MINUTES)
tmorgan 2:46d52fa160b2 83 function_mode = SET_SECONDS;
tmorgan 2:46d52fa160b2 84 else if (function_mode == SET_SECONDS)
tmorgan 2:46d52fa160b2 85 function_mode = SHOW_TIME;
tmorgan 2:46d52fa160b2 86 else if (function_mode == SHOW_TIME)
tmorgan 2:46d52fa160b2 87 function_mode = SET_HOURS;
tmorgan 2:46d52fa160b2 88 }
tmorgan 2:46d52fa160b2 89
tmorgan 2:46d52fa160b2 90 // Wait for slider to be pressed (or mode change)
tmorgan 2:46d52fa160b2 91 void waitForTouch(int mode)
tmorgan 2:46d52fa160b2 92 {
tmorgan 2:46d52fa160b2 93 redLED = 0;
tmorgan 2:46d52fa160b2 94 while(tsi.readDistance() == 0 && function_mode == mode)
tmorgan 2:46d52fa160b2 95 {
tmorgan 2:46d52fa160b2 96 wait(0.2);
tmorgan 2:46d52fa160b2 97 redLED = !redLED;
tmorgan 2:46d52fa160b2 98 }
tmorgan 2:46d52fa160b2 99 redLED = 1;
tmorgan 2:46d52fa160b2 100 }
star297 0:4f67859595b2 101
tmorgan 2:46d52fa160b2 102 // Wait for slider to be released and return slider value between 0 and <scale>
tmorgan 2:46d52fa160b2 103 int waitForRelease(char *label, int scale)
tmorgan 2:46d52fa160b2 104 {
tmorgan 2:46d52fa160b2 105 float pct;
tmorgan 2:46d52fa160b2 106 int return_value = 0;
tmorgan 2:46d52fa160b2 107
tmorgan 2:46d52fa160b2 108 greenLED = 0;
tmorgan 2:46d52fa160b2 109 while((pct = tsi.readPercentage()) != 0)
tmorgan 2:46d52fa160b2 110 {
tmorgan 2:46d52fa160b2 111 // In practice, readPercentage returns a number in the range 0.06..0.99
tmorgan 2:46d52fa160b2 112 // Stretch it to 0.00..0.99 before applying scale.
tmorgan 2:46d52fa160b2 113 pct = (pct - 0.09)/ 0.90;
tmorgan 2:46d52fa160b2 114 if (pct < 0.0) pct = 0.0;
tmorgan 2:46d52fa160b2 115 return_value = scale * pct;
tmorgan 2:46d52fa160b2 116 sLCD.printf("%2s%2i", label, return_value);
tmorgan 2:46d52fa160b2 117 wait(0.2);
tmorgan 2:46d52fa160b2 118 greenLED = !greenLED;
tmorgan 2:46d52fa160b2 119 }
tmorgan 2:46d52fa160b2 120 greenLED = 1;
tmorgan 2:46d52fa160b2 121 return return_value;
tmorgan 2:46d52fa160b2 122 }
tmorgan 2:46d52fa160b2 123
tmorgan 2:46d52fa160b2 124 // If slider is touched, update hours
tmorgan 2:46d52fa160b2 125 void setHours(void)
tmorgan 2:46d52fa160b2 126 {
tmorgan 2:46d52fa160b2 127 int hours, minutes, seconds;
tmorgan 2:46d52fa160b2 128
tmorgan 2:46d52fa160b2 129 get_HHMMSS(&hours, &minutes, &seconds);
tmorgan 2:46d52fa160b2 130 sLCD.printf("HH%2i", hours);
tmorgan 2:46d52fa160b2 131 waitForTouch(SET_HOURS);
tmorgan 2:46d52fa160b2 132 if (function_mode == SET_HOURS)
tmorgan 2:46d52fa160b2 133 {
tmorgan 2:46d52fa160b2 134 hours = waitForRelease("HH",24);
tmorgan 2:46d52fa160b2 135 pc.printf("Setting hours to %i\r\n", hours);
tmorgan 2:46d52fa160b2 136 set_HHMMSS(hours, minutes, seconds);
tmorgan 2:46d52fa160b2 137 function_mode = SHOW_TIME;
tmorgan 2:46d52fa160b2 138 display_state = SHOW_HHMM;
tmorgan 2:46d52fa160b2 139 }
tmorgan 2:46d52fa160b2 140 }
star297 0:4f67859595b2 141
tmorgan 2:46d52fa160b2 142 // If slider is touched, update minutes
tmorgan 2:46d52fa160b2 143 void setMinutes(void)
tmorgan 2:46d52fa160b2 144 {
tmorgan 2:46d52fa160b2 145 int hours, minutes, seconds;
tmorgan 2:46d52fa160b2 146
tmorgan 2:46d52fa160b2 147 get_HHMMSS(&hours, &minutes, &seconds);
tmorgan 2:46d52fa160b2 148 sLCD.printf("MM%2i", minutes);
tmorgan 2:46d52fa160b2 149 waitForTouch(SET_MINUTES);
tmorgan 2:46d52fa160b2 150 if (function_mode == SET_MINUTES)
tmorgan 2:46d52fa160b2 151 {
tmorgan 2:46d52fa160b2 152 minutes = waitForRelease("MM",60);
tmorgan 2:46d52fa160b2 153 pc.printf("Setting minutes to %i\r\n", minutes);
tmorgan 2:46d52fa160b2 154 set_HHMMSS(hours, minutes, seconds);
tmorgan 2:46d52fa160b2 155 function_mode = SHOW_TIME;
tmorgan 2:46d52fa160b2 156 display_state = SHOW_HHMM;
tmorgan 2:46d52fa160b2 157 }
tmorgan 2:46d52fa160b2 158 }
star297 0:4f67859595b2 159
tmorgan 2:46d52fa160b2 160 // If slider is touched, update seconds
tmorgan 2:46d52fa160b2 161 void setSeconds(void)
tmorgan 2:46d52fa160b2 162 {
tmorgan 2:46d52fa160b2 163 int hours, minutes, seconds;
tmorgan 2:46d52fa160b2 164
tmorgan 2:46d52fa160b2 165 get_HHMMSS(&hours, &minutes, &seconds);
tmorgan 2:46d52fa160b2 166 sLCD.printf("SS%2i", seconds);
tmorgan 2:46d52fa160b2 167 waitForTouch(SET_SECONDS);
tmorgan 2:46d52fa160b2 168 if (function_mode == SET_SECONDS)
tmorgan 2:46d52fa160b2 169 {
tmorgan 2:46d52fa160b2 170 seconds = waitForRelease("SS",60);
tmorgan 2:46d52fa160b2 171 pc.printf("Setting seconds to %i\r\n", seconds);
tmorgan 2:46d52fa160b2 172 set_HHMMSS(hours, minutes, seconds);
tmorgan 2:46d52fa160b2 173 function_mode = SHOW_TIME;
tmorgan 2:46d52fa160b2 174 display_state = SHOW_SS;
tmorgan 2:46d52fa160b2 175 }
tmorgan 2:46d52fa160b2 176 }
star297 0:4f67859595b2 177
tmorgan 2:46d52fa160b2 178 // Cycle between time-display states
tmorgan 2:46d52fa160b2 179 // In states SHOW_HHMM to SHOW_SS - 1, display HH:MM & flash green LED.
tmorgan 2:46d52fa160b2 180 // In states SHOW_SS to SHOW_LOOP, display :SS & flash red LED.
tmorgan 2:46d52fa160b2 181 void showTime(void)
tmorgan 2:46d52fa160b2 182 {
tmorgan 2:46d52fa160b2 183 DigitalOut *flashLED;
tmorgan 2:46d52fa160b2 184 time_t rtcTime = time(NULL);
tmorgan 2:46d52fa160b2 185
tmorgan 2:46d52fa160b2 186 if(display_state < SHOW_SS)
tmorgan 2:46d52fa160b2 187 {
tmorgan 2:46d52fa160b2 188 strftime(LCDbuffer, 4, "%H%M", localtime(&rtcTime));// display HH:MM
tmorgan 2:46d52fa160b2 189 flashLED = &greenLED; // while flashing green LED
tmorgan 2:46d52fa160b2 190 }
tmorgan 2:46d52fa160b2 191 else
tmorgan 2:46d52fa160b2 192 {
tmorgan 2:46d52fa160b2 193 strftime(LCDbuffer, 4, " %S", localtime(&rtcTime));// display :SS
tmorgan 2:46d52fa160b2 194 flashLED = &redLED; // while flashing red LED
tmorgan 2:46d52fa160b2 195 }
tmorgan 2:46d52fa160b2 196 sLCD.printf(LCDbuffer); // Send to LCD
tmorgan 2:46d52fa160b2 197 redLED = 1; greenLED = 1; // Both LEDs off
tmorgan 2:46d52fa160b2 198 wait(0.5);
tmorgan 2:46d52fa160b2 199 *flashLED = 0; // Red or Green on.
tmorgan 2:46d52fa160b2 200 wait(0.5);
tmorgan 2:46d52fa160b2 201 redLED = 1; greenLED = 1; // Both LEDs off.
tmorgan 2:46d52fa160b2 202 if (function_mode == SHOW_TIME) display_state++; // Increment display counter if no switch pressed
tmorgan 2:46d52fa160b2 203 if (display_state > SHOW_LOOP) display_state = SHOW_HHMM;
tmorgan 2:46d52fa160b2 204 }
star297 0:4f67859595b2 205
star297 0:4f67859595b2 206 main()
star297 1:34f0bfc62803 207 {
tmorgan 2:46d52fa160b2 208 pc.printf("\r\n\nFRDM-KL46Z Clock\r\n");
star297 1:34f0bfc62803 209
tmorgan 2:46d52fa160b2 210 sLCD.All_Segments(1); wait(1); // Flash LCD segments
tmorgan 2:46d52fa160b2 211 sLCD.All_Segments(0); wait(1);
star297 0:4f67859595b2 212
tmorgan 2:46d52fa160b2 213 greenLED = 1; redLED = 1; // Both LEDs off
tmorgan 2:46d52fa160b2 214
tmorgan 2:46d52fa160b2 215 scroll_message(); // Display instructions
tmorgan 2:46d52fa160b2 216
tmorgan 2:46d52fa160b2 217 setModeSwitch.rise(setMode); // Enable setMode interrupt handler
star297 1:34f0bfc62803 218
tmorgan 2:46d52fa160b2 219 sLCD.Colon(1); sLCD.DP2(0);
tmorgan 2:46d52fa160b2 220 function_mode = SHOW_TIME;
tmorgan 2:46d52fa160b2 221 while(1)
tmorgan 2:46d52fa160b2 222 {
tmorgan 2:46d52fa160b2 223 if (function_mode == SET_HOURS)
tmorgan 2:46d52fa160b2 224 setHours();
tmorgan 2:46d52fa160b2 225 else if (function_mode == SET_MINUTES)
tmorgan 2:46d52fa160b2 226 setMinutes();
tmorgan 2:46d52fa160b2 227 else if (function_mode == SET_SECONDS)
tmorgan 2:46d52fa160b2 228 setSeconds();
tmorgan 2:46d52fa160b2 229 else if (function_mode == SHOW_TIME)
tmorgan 2:46d52fa160b2 230 showTime();
star297 0:4f67859595b2 231 }
star297 1:34f0bfc62803 232 }
star297 0:4f67859595b2 233
star297 0:4f67859595b2 234