Mark Randall / LKM1638

This is a library for the JY-LKM1638 Display

LKM1638.cpp@0:c05022d4f68c, 2013-08-19 (annotated)

Committer:
mr63
Date:
Mon Aug 19 17:09:38 2013 +0000
Revision:
0:c05022d4f68c
This is a library for the JY-LKM1638 Display

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mr63 0:c05022d4f68c 1
mr63 0:c05022d4f68c 2 #include "mbed.h"
mr63 0:c05022d4f68c 3 #include "LKM1638.h"
mr63 0:c05022d4f68c 4
mr63 0:c05022d4f68c 5
mr63 0:c05022d4f68c 6 const char READMODE = 0x42;
mr63 0:c05022d4f68c 7 const char INTENSITY = 0x00; //Intensity of LED and Seven Segment Displays (0-7)
mr63 0:c05022d4f68c 8 const int WAIT = 1;
mr63 0:c05022d4f68c 9
mr63 0:c05022d4f68c 10
mr63 0:c05022d4f68c 11 //MPL3115A2 Class Constructor
mr63 0:c05022d4f68c 12 LKM1636::LKM1636(PinName pin1, PinName pin2, PinName pin3) :_Strobe(pin1),_CLK(pin2),_Data(pin3)
mr63 0:c05022d4f68c 13 {
mr63 0:c05022d4f68c 14 _Data.mode(PullUp);
mr63 0:c05022d4f68c 15
mr63 0:c05022d4f68c 16 }
mr63 0:c05022d4f68c 17
mr63 0:c05022d4f68c 18
mr63 0:c05022d4f68c 19 //Driver Function that is used to write any printable char to the seven segment displays 0-7
mr63 0:c05022d4f68c 20 void LKM1636::displaychar (unsigned char value, unsigned char Seg_num, bool decimal) //Seg_num 0-7 ____,____
mr63 0:c05022d4f68c 21 {
mr63 0:c05022d4f68c 22
mr63 0:c05022d4f68c 23 unsigned char address;
mr63 0:c05022d4f68c 24 unsigned char Seg_value=0;
mr63 0:c05022d4f68c 25 address = 0xC0 + Seg_num * 2; //Base Address for Segments is 0xC0 Each segment uses to Bytes of Mem.
mr63 0:c05022d4f68c 26 Seg_value = getchar(value);
mr63 0:c05022d4f68c 27 if(decimal)
mr63 0:c05022d4f68c 28 Seg_value = Seg_value | 0x80;
mr63 0:c05022d4f68c 29 if(Seg_value<0xff) // If Seg_value == 0xFF then character was not recognized
mr63 0:c05022d4f68c 30 {
mr63 0:c05022d4f68c 31 _Strobe = 0;
mr63 0:c05022d4f68c 32 SendChar(address);
mr63 0:c05022d4f68c 33 SendChar(Seg_value);
mr63 0:c05022d4f68c 34 _Strobe = 1;
mr63 0:c05022d4f68c 35 Delay(WAIT);
mr63 0:c05022d4f68c 36 _Strobe = 0;
mr63 0:c05022d4f68c 37 SendChar(INTENSITY | 0x88);
mr63 0:c05022d4f68c 38 _Strobe = 1;
mr63 0:c05022d4f68c 39 }
mr63 0:c05022d4f68c 40
mr63 0:c05022d4f68c 41
mr63 0:c05022d4f68c 42
mr63 0:c05022d4f68c 43 }
mr63 0:c05022d4f68c 44
mr63 0:c05022d4f68c 45
mr63 0:c05022d4f68c 46 //Prints a Long int to the 8 Seven Segment displays
mr63 0:c05022d4f68c 47 void LKM1636::Clear() //bank is either Seven Segs 0-3 Bank==0 or Segs 4-7 Bank==1
mr63 0:c05022d4f68c 48 {
mr63 0:c05022d4f68c 49 unsigned long temp1=0;
mr63 0:c05022d4f68c 50
mr63 0:c05022d4f68c 51 for(temp1=0;temp1<8;temp1++)
mr63 0:c05022d4f68c 52 {
mr63 0:c05022d4f68c 53 displaychar (' ',temp1,0);
mr63 0:c05022d4f68c 54 }
mr63 0:c05022d4f68c 55
mr63 0:c05022d4f68c 56 }
mr63 0:c05022d4f68c 57
mr63 0:c05022d4f68c 58
mr63 0:c05022d4f68c 59
mr63 0:c05022d4f68c 60 ///Writes an 8bool number to either the first or second bank of 4 seven segment displays
mr63 0:c05022d4f68c 61
mr63 0:c05022d4f68c 62 void LKM1636::Write_Short(unsigned char value, bool bank) //bank is either Seven Segs 0-3 Bank==0 or Segs 4-7 Bank==1
mr63 0:c05022d4f68c 63 {
mr63 0:c05022d4f68c 64 unsigned char temp=0;
mr63 0:c05022d4f68c 65 unsigned char Seg_number = 0;
mr63 0:c05022d4f68c 66 if(bank)
mr63 0:c05022d4f68c 67 Seg_number = 5;
mr63 0:c05022d4f68c 68 temp = value/100;
mr63 0:c05022d4f68c 69 temp = temp%10;
mr63 0:c05022d4f68c 70 displaychar (temp, Seg_number,0);
mr63 0:c05022d4f68c 71 temp = value/10;
mr63 0:c05022d4f68c 72 temp = temp%10;
mr63 0:c05022d4f68c 73 displaychar (temp, Seg_number+1,0);
mr63 0:c05022d4f68c 74 temp = value%10;
mr63 0:c05022d4f68c 75 displaychar (temp, Seg_number+2,0);
mr63 0:c05022d4f68c 76 }
mr63 0:c05022d4f68c 77 //Prints a Long int to the 8 Seven Segment displays
mr63 0:c05022d4f68c 78 void LKM1636::Write_Long(unsigned long int value) //bank is either Seven Segs 0-3 Bank==0 or Segs 4-7 Bank==1
mr63 0:c05022d4f68c 79 {
mr63 0:c05022d4f68c 80 unsigned long temp1=0;
mr63 0:c05022d4f68c 81
mr63 0:c05022d4f68c 82 temp1 = (value/10000000);
mr63 0:c05022d4f68c 83 temp1 = temp1%10;
mr63 0:c05022d4f68c 84 displaychar ((unsigned char)temp1,0,0);
mr63 0:c05022d4f68c 85
mr63 0:c05022d4f68c 86 temp1 = (value/1000000);
mr63 0:c05022d4f68c 87 temp1 = temp1%10;
mr63 0:c05022d4f68c 88 displaychar ((unsigned char)temp1,1,0);
mr63 0:c05022d4f68c 89
mr63 0:c05022d4f68c 90 temp1 = (value/100000);
mr63 0:c05022d4f68c 91 temp1 = temp1%10;
mr63 0:c05022d4f68c 92 displaychar ((unsigned char)temp1,2,0);
mr63 0:c05022d4f68c 93
mr63 0:c05022d4f68c 94 temp1 = (value/10000);
mr63 0:c05022d4f68c 95 temp1 = temp1%10;
mr63 0:c05022d4f68c 96 displaychar ((unsigned char)temp1,3,0);
mr63 0:c05022d4f68c 97
mr63 0:c05022d4f68c 98 temp1 = (value/1000);
mr63 0:c05022d4f68c 99 temp1 = temp1%10;
mr63 0:c05022d4f68c 100 displaychar ((unsigned char)temp1,4,0);
mr63 0:c05022d4f68c 101
mr63 0:c05022d4f68c 102 temp1 =(value/100);
mr63 0:c05022d4f68c 103 temp1 = temp1%10;
mr63 0:c05022d4f68c 104 displaychar ((unsigned char)temp1,5,0);
mr63 0:c05022d4f68c 105
mr63 0:c05022d4f68c 106 temp1 = (value/10);
mr63 0:c05022d4f68c 107 temp1 = temp1%10;
mr63 0:c05022d4f68c 108 displaychar ((unsigned char)temp1,6,0);
mr63 0:c05022d4f68c 109
mr63 0:c05022d4f68c 110 temp1 = (value%10);
mr63 0:c05022d4f68c 111 displaychar ((unsigned char)temp1,7,0);
mr63 0:c05022d4f68c 112 }
mr63 0:c05022d4f68c 113
mr63 0:c05022d4f68c 114 // Serializes the Value passed into the character variable and send out using the data pin
mr63 0:c05022d4f68c 115 void LKM1636::SendChar(unsigned char Character)
mr63 0:c05022d4f68c 116 {
mr63 0:c05022d4f68c 117 unsigned char t;
mr63 0:c05022d4f68c 118 _CLK =1;
mr63 0:c05022d4f68c 119 _Data.output();
mr63 0:c05022d4f68c 120 Delay(WAIT);
mr63 0:c05022d4f68c 121 for (t=0;t<8;t++) //Serialize Address and put out on Data Pin
mr63 0:c05022d4f68c 122 {
mr63 0:c05022d4f68c 123
mr63 0:c05022d4f68c 124 _Data = (Character & 0x01);
mr63 0:c05022d4f68c 125 Character = Character>>1;
mr63 0:c05022d4f68c 126 ToggleClock ();
mr63 0:c05022d4f68c 127 }
mr63 0:c05022d4f68c 128 _Data.input();
mr63 0:c05022d4f68c 129
mr63 0:c05022d4f68c 130 }
mr63 0:c05022d4f68c 131 /// Toggles the Clock pin low to high with a minimal delay between the toggle
mr63 0:c05022d4f68c 132 void LKM1636::ToggleClock ()
mr63 0:c05022d4f68c 133 {
mr63 0:c05022d4f68c 134 _CLK = 0;
mr63 0:c05022d4f68c 135 Delay(WAIT);
mr63 0:c05022d4f68c 136 _CLK = 1;
mr63 0:c05022d4f68c 137 Delay(WAIT);
mr63 0:c05022d4f68c 138 }
mr63 0:c05022d4f68c 139 /// Delay for Tick * Tocks of system clock
mr63 0:c05022d4f68c 140 ///
mr63 0:c05022d4f68c 141 void LKM1636::Delay(unsigned int Tick)
mr63 0:c05022d4f68c 142 {
mr63 0:c05022d4f68c 143 unsigned int tock=0,t=0;
mr63 0:c05022d4f68c 144 for(t=0;t<Tick;t++)
mr63 0:c05022d4f68c 145 {
mr63 0:c05022d4f68c 146 for(tock=0;tock<10;tock++);
mr63 0:c05022d4f68c 147 }
mr63 0:c05022d4f68c 148
mr63 0:c05022d4f68c 149 }
mr63 0:c05022d4f68c 150
mr63 0:c05022d4f68c 151 /// Getchar takes a integer value 0-15 or ascii value '0' - 'F'
mr63 0:c05022d4f68c 152 /// and returns the Seven Segment value needed to display the value
mr63 0:c05022d4f68c 153
mr63 0:c05022d4f68c 154 unsigned char LKM1636::getchar(unsigned char value)
mr63 0:c05022d4f68c 155 {
mr63 0:c05022d4f68c 156 int seg_value = 0;
mr63 0:c05022d4f68c 157
mr63 0:c05022d4f68c 158 switch(value)
mr63 0:c05022d4f68c 159 {
mr63 0:c05022d4f68c 160 case ('0'):
mr63 0:c05022d4f68c 161 case (0):
mr63 0:c05022d4f68c 162 seg_value = 0x3f;
mr63 0:c05022d4f68c 163 break;
mr63 0:c05022d4f68c 164 case ('1'):
mr63 0:c05022d4f68c 165 case (1):
mr63 0:c05022d4f68c 166 seg_value = 0x6;
mr63 0:c05022d4f68c 167 break;
mr63 0:c05022d4f68c 168 case ('2'):
mr63 0:c05022d4f68c 169 case (2):
mr63 0:c05022d4f68c 170 seg_value = 0x5b;
mr63 0:c05022d4f68c 171 break;
mr63 0:c05022d4f68c 172 case ('3'):
mr63 0:c05022d4f68c 173 case (3):
mr63 0:c05022d4f68c 174 seg_value = 0x4f;
mr63 0:c05022d4f68c 175 break;
mr63 0:c05022d4f68c 176 case ('4'):
mr63 0:c05022d4f68c 177 case (4):
mr63 0:c05022d4f68c 178 seg_value = 0x66;
mr63 0:c05022d4f68c 179 break;
mr63 0:c05022d4f68c 180 case ('5'):
mr63 0:c05022d4f68c 181 case (5):
mr63 0:c05022d4f68c 182 seg_value = 0x6d;
mr63 0:c05022d4f68c 183 break;
mr63 0:c05022d4f68c 184 case ('6'):
mr63 0:c05022d4f68c 185 case (6):
mr63 0:c05022d4f68c 186 seg_value = 0x7d;
mr63 0:c05022d4f68c 187 break;
mr63 0:c05022d4f68c 188 case ('7'):
mr63 0:c05022d4f68c 189 case (7):
mr63 0:c05022d4f68c 190 seg_value = 0x7;
mr63 0:c05022d4f68c 191 break;
mr63 0:c05022d4f68c 192 case ('8'):
mr63 0:c05022d4f68c 193 case (8):
mr63 0:c05022d4f68c 194 seg_value = 0x7f;
mr63 0:c05022d4f68c 195 break;
mr63 0:c05022d4f68c 196 case ('9'):
mr63 0:c05022d4f68c 197 case (9):
mr63 0:c05022d4f68c 198 seg_value = 0x6f;
mr63 0:c05022d4f68c 199 break;
mr63 0:c05022d4f68c 200 case ('A'):
mr63 0:c05022d4f68c 201 case ('a'):
mr63 0:c05022d4f68c 202 case (10):
mr63 0:c05022d4f68c 203 seg_value = 0x77;
mr63 0:c05022d4f68c 204 break;
mr63 0:c05022d4f68c 205 case ('B'):
mr63 0:c05022d4f68c 206 case ('b'):
mr63 0:c05022d4f68c 207 case (11):
mr63 0:c05022d4f68c 208 seg_value = 0x7c;
mr63 0:c05022d4f68c 209 break;
mr63 0:c05022d4f68c 210 case ('C'):
mr63 0:c05022d4f68c 211 case ('c'):
mr63 0:c05022d4f68c 212 case (12):
mr63 0:c05022d4f68c 213 seg_value = 0x39;
mr63 0:c05022d4f68c 214 break;
mr63 0:c05022d4f68c 215 case ('D'):
mr63 0:c05022d4f68c 216 case ('d'):
mr63 0:c05022d4f68c 217 case (13):
mr63 0:c05022d4f68c 218 seg_value = 0x5e;
mr63 0:c05022d4f68c 219 break;
mr63 0:c05022d4f68c 220 case ('E'):
mr63 0:c05022d4f68c 221 case ('e'):
mr63 0:c05022d4f68c 222 case (14):
mr63 0:c05022d4f68c 223 seg_value = 0x79;
mr63 0:c05022d4f68c 224 break;
mr63 0:c05022d4f68c 225 case ('F'):
mr63 0:c05022d4f68c 226 case ('f'):
mr63 0:c05022d4f68c 227 case (15):
mr63 0:c05022d4f68c 228 seg_value = 0x71;
mr63 0:c05022d4f68c 229 break;
mr63 0:c05022d4f68c 230 case ('.'):
mr63 0:c05022d4f68c 231 seg_value = 0x80;
mr63 0:c05022d4f68c 232 break;
mr63 0:c05022d4f68c 233 case ('-'):
mr63 0:c05022d4f68c 234 seg_value = 0x40;
mr63 0:c05022d4f68c 235 break;
mr63 0:c05022d4f68c 236 case (' '):
mr63 0:c05022d4f68c 237 seg_value =0x0;
mr63 0:c05022d4f68c 238 break;
mr63 0:c05022d4f68c 239 default :
mr63 0:c05022d4f68c 240 seg_value = 0xff;
mr63 0:c05022d4f68c 241 break;
mr63 0:c05022d4f68c 242
mr63 0:c05022d4f68c 243 }
mr63 0:c05022d4f68c 244 return (seg_value);
mr63 0:c05022d4f68c 245 }
mr63 0:c05022d4f68c 246
mr63 0:c05022d4f68c 247 //Reads the current state of all 8 input buttons. The state of each button is returned as an 8bool value
mr63 0:c05022d4f68c 248 //the bool to Sw map:
mr63 0:c05022d4f68c 249 //Switch bool order bool# 7 6 5 4 3 2 1 0 //0x80 0x20 0x08 0x02 || 0x40 0x10 0x04 0x01
mr63 0:c05022d4f68c 250 // Sw# 1 5 2 6 3 7 4 8
mr63 0:c05022d4f68c 251
mr63 0:c05022d4f68c 252 unsigned char LKM1636::read_buttons ()
mr63 0:c05022d4f68c 253 {
mr63 0:c05022d4f68c 254 unsigned char temp=0;
mr63 0:c05022d4f68c 255 char d=0;
mr63 0:c05022d4f68c 256 _Strobe = 0;
mr63 0:c05022d4f68c 257 SendChar(READMODE);
mr63 0:c05022d4f68c 258 //_Data = 1;
mr63 0:c05022d4f68c 259 _CLK = 1;
mr63 0:c05022d4f68c 260 Delay(WAIT);
mr63 0:c05022d4f68c 261 for(d=0;d<32;d++)
mr63 0:c05022d4f68c 262 {
mr63 0:c05022d4f68c 263 if(!((d-1)%4))
mr63 0:c05022d4f68c 264 {
mr63 0:c05022d4f68c 265 temp=temp<<1;
mr63 0:c05022d4f68c 266 if(_Data)
mr63 0:c05022d4f68c 267 temp+=1;
mr63 0:c05022d4f68c 268 }
mr63 0:c05022d4f68c 269 ToggleClock ();
mr63 0:c05022d4f68c 270 }
mr63 0:c05022d4f68c 271 _Strobe = 1;
mr63 0:c05022d4f68c 272 return temp;
mr63 0:c05022d4f68c 273 }
mr63 0:c05022d4f68c 274
mr63 0:c05022d4f68c 275 //Takes the 8bool number returned from the read_buttons function and lights the corsponing LED to current switch posistion
mr63 0:c05022d4f68c 276 void LKM1636::Switch_To_LED(unsigned char Switch_Values)
mr63 0:c05022d4f68c 277 {
mr63 0:c05022d4f68c 278 unsigned char t=0;
mr63 0:c05022d4f68c 279 bool temp_state=0;
mr63 0:c05022d4f68c 280 for(t=0; t<8; t++)
mr63 0:c05022d4f68c 281 {
mr63 0:c05022d4f68c 282 temp_state = (Switch_Values & 0x01);
mr63 0:c05022d4f68c 283 Switch_Values= Switch_Values>>1;
mr63 0:c05022d4f68c 284 switch (t)
mr63 0:c05022d4f68c 285 {
mr63 0:c05022d4f68c 286 case (0):
mr63 0:c05022d4f68c 287 LED (7, temp_state);
mr63 0:c05022d4f68c 288 break;
mr63 0:c05022d4f68c 289 case (1):
mr63 0:c05022d4f68c 290 LED (3, temp_state);
mr63 0:c05022d4f68c 291 break;
mr63 0:c05022d4f68c 292 case (2):
mr63 0:c05022d4f68c 293 LED (6, temp_state);
mr63 0:c05022d4f68c 294 break;
mr63 0:c05022d4f68c 295 case (3):
mr63 0:c05022d4f68c 296 LED (2, temp_state);
mr63 0:c05022d4f68c 297 break;
mr63 0:c05022d4f68c 298 case (4):
mr63 0:c05022d4f68c 299 LED (5, temp_state);
mr63 0:c05022d4f68c 300 break;
mr63 0:c05022d4f68c 301 case (5):
mr63 0:c05022d4f68c 302 LED (1, temp_state);
mr63 0:c05022d4f68c 303 break;
mr63 0:c05022d4f68c 304 case (6):
mr63 0:c05022d4f68c 305 LED (4, temp_state);
mr63 0:c05022d4f68c 306 break;
mr63 0:c05022d4f68c 307 case (7):
mr63 0:c05022d4f68c 308 LED (0, temp_state);
mr63 0:c05022d4f68c 309 break;
mr63 0:c05022d4f68c 310 default:
mr63 0:c05022d4f68c 311 break;
mr63 0:c05022d4f68c 312 }
mr63 0:c05022d4f68c 313
mr63 0:c05022d4f68c 314 }
mr63 0:c05022d4f68c 315 }
mr63 0:c05022d4f68c 316
mr63 0:c05022d4f68c 317 //LED_Num (0-7)) corsponds to the LED that is to be written to state(1=led on, 0 = led off)
mr63 0:c05022d4f68c 318 void LKM1636::LED (unsigned char LED_Num, bool state)//intensity can range from 0-7
mr63 0:c05022d4f68c 319 {
mr63 0:c05022d4f68c 320 unsigned char LED_Address;
mr63 0:c05022d4f68c 321 LED_Address = 0xC0 + (LED_Num*2) + 1; //LED are at odd address 1 to 15;
mr63 0:c05022d4f68c 322 _Strobe = 0;
mr63 0:c05022d4f68c 323 SendChar(LED_Address);
mr63 0:c05022d4f68c 324 if(state)
mr63 0:c05022d4f68c 325 SendChar(0x01);
mr63 0:c05022d4f68c 326 else
mr63 0:c05022d4f68c 327 SendChar(0x00);
mr63 0:c05022d4f68c 328 _Strobe = 1;
mr63 0:c05022d4f68c 329 Delay(WAIT);
mr63 0:c05022d4f68c 330 _Strobe = 0;
mr63 0:c05022d4f68c 331 SendChar(INTENSITY | 0x88);
mr63 0:c05022d4f68c 332 _Strobe = 1;
mr63 0:c05022d4f68c 333 }
mr63 0:c05022d4f68c 334 //Takes a 8bool number and writes out the value to the 8 leds (0-7)
mr63 0:c05022d4f68c 335 void LKM1636::LEDS (unsigned char LED_Values)
mr63 0:c05022d4f68c 336 {
mr63 0:c05022d4f68c 337 unsigned char temp;
mr63 0:c05022d4f68c 338 bool temp_state = 0 ;
mr63 0:c05022d4f68c 339 for(temp=0; temp<8; temp++)
mr63 0:c05022d4f68c 340 {
mr63 0:c05022d4f68c 341 temp_state = (LED_Values & 0x01);
mr63 0:c05022d4f68c 342 LED (temp, temp_state);
mr63 0:c05022d4f68c 343 LED_Values= LED_Values>>1;
mr63 0:c05022d4f68c 344 }
mr63 0:c05022d4f68c 345 }