Jon Trinder / jtlcd

Convenience routines for an I"C connected LCD display. Handy things like taking cursor to home, positioning cursor, clearing display, writing strings etc

Dependents:   gu_squirt_tester

jtlcd.cpp@2:5b220477045b, 2012-11-08 (annotated)

Committer:
jont
Date:
Thu Nov 08 06:12:34 2012 +0000
Revision:
2:5b220477045b
Parent:
1:2ded47079af1
Child:
3:5744bf6006e1
update;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jont 0:8f724a47a820 1 #include "mbed.h"
jont 0:8f724a47a820 2 #include "jtlcd.h"
jont 2:5b220477045b 3 #include "stdarg.h"
jont 2:5b220477045b 4 #include "stdio.h"
jont 2:5b220477045b 5 #define LCDCONTROL 0x00
jont 2:5b220477045b 6 #define LCDDATA 0x40
jont 2:5b220477045b 7
jont 2:5b220477045b 8 #define LCDBOTTOMSTART 0x40 /* start address of bottom line */
jont 2:5b220477045b 9 #define LCDTOPSTART 0x00 /* start address of top line */
jont 0:8f724a47a820 10
jont 0:8f724a47a820 11 I2C i2c(p28, p27); // sda, scl
jont 2:5b220477045b 12
jont 2:5b220477045b 13
jont 2:5b220477045b 14 /*==============================================================*/
jont 2:5b220477045b 15 /* LcdGetAddress */
jont 2:5b220477045b 16 /*==============================================================*/
jont 2:5b220477045b 17 /*
jont 2:5b220477045b 18 int LcdGetAddress(void)
jont 2:5b220477045b 19 {
jont 2:5b220477045b 20 int it; // current address position
jont 2:5b220477045b 21 it =read_E_port( LCDCONTROL);
jont 2:5b220477045b 22 return(it);
jont 2:5b220477045b 23
jont 2:5b220477045b 24 }
jont 2:5b220477045b 25 */
jont 2:5b220477045b 26 /*==============================================================*/
jont 2:5b220477045b 27 /* LcdSetAddress */
jont 2:5b220477045b 28 /*==============================================================*/
jont 2:5b220477045b 29
jont 2:5b220477045b 30 void LcdSetAddress(int address)
jont 2:5b220477045b 31 {
jont 2:5b220477045b 32 // LcdReady();
jont 2:5b220477045b 33 address |= 0x80; /* write cg/dd ram address */
jont 2:5b220477045b 34 write_E_port(LCDCONTROL, address);
jont 2:5b220477045b 35 }
jont 2:5b220477045b 36
jont 2:5b220477045b 37
jont 2:5b220477045b 38 /*==============================================================*/
jont 2:5b220477045b 39 /* LcdClear */
jont 2:5b220477045b 40 /*==============================================================*/
jont 2:5b220477045b 41 void LcdClear(void)
jont 2:5b220477045b 42 {
jont 2:5b220477045b 43 // LcdReady();
jont 2:5b220477045b 44 write_E_port(LCDCONTROL, 0x01);
jont 2:5b220477045b 45 }
jont 2:5b220477045b 46 /*==============================================================*/
jont 2:5b220477045b 47 /* LcdHomeTop */
jont 2:5b220477045b 48 /*==============================================================*/
jont 2:5b220477045b 49 void LcdHomeTop(void)
jont 2:5b220477045b 50 {
jont 2:5b220477045b 51 // LcdReady();
jont 2:5b220477045b 52 write_E_port(LCDCONTROL, 0x02);
jont 2:5b220477045b 53 }
jont 2:5b220477045b 54 /*==============================================================*/
jont 2:5b220477045b 55 /* LcdHomeBottom */
jont 2:5b220477045b 56 /*==============================================================*/
jont 2:5b220477045b 57 void LcdHomeBottom(void)
jont 2:5b220477045b 58 {
jont 2:5b220477045b 59 //LcdReady();
jont 2:5b220477045b 60 write_E_port(LCDCONTROL, 0xc0);
jont 2:5b220477045b 61 }
jont 2:5b220477045b 62
jont 2:5b220477045b 63 /*==============================================================*/
jont 2:5b220477045b 64 /* LcdCursorLeft */
jont 2:5b220477045b 65 /*==============================================================*/
jont 2:5b220477045b 66 void LcdCursorLeft(void)
jont 2:5b220477045b 67 {
jont 2:5b220477045b 68 //LcdReady();
jont 2:5b220477045b 69 write_E_port(LCDCONTROL, 0x10);
jont 2:5b220477045b 70 }
jont 2:5b220477045b 71
jont 2:5b220477045b 72 /*==============================================================*/
jont 2:5b220477045b 73 /* LcdCursorRight */
jont 2:5b220477045b 74 /*==============================================================*/
jont 2:5b220477045b 75 void LcdCursorRight(void)
jont 2:5b220477045b 76 {
jont 2:5b220477045b 77 //LcdReady();
jont 2:5b220477045b 78 write_E_port(LCDCONTROL, 0x14);
jont 2:5b220477045b 79 }
jont 2:5b220477045b 80
jont 2:5b220477045b 81 /*==============================================================*/
jont 2:5b220477045b 82 /* LcdSpace */
jont 2:5b220477045b 83 /*==============================================================*/
jont 2:5b220477045b 84 void LcdSpace(void)
jont 2:5b220477045b 85 {
jont 2:5b220477045b 86 // LcdReady();
jont 2:5b220477045b 87 write_E_port(LCDDATA, 0x20);
jont 2:5b220477045b 88 }
jont 2:5b220477045b 89
jont 2:5b220477045b 90 /*==============================================================*/
jont 2:5b220477045b 91 /* LcdNSpace */
jont 2:5b220477045b 92 /*==============================================================*/
jont 2:5b220477045b 93 void LcdNSpace(int number)
jont 2:5b220477045b 94
jont 2:5b220477045b 95 {
jont 2:5b220477045b 96 int count;
jont 2:5b220477045b 97 for (count = 0; count < number; count++)
jont 2:5b220477045b 98 {
jont 2:5b220477045b 99 LcdSpace();
jont 2:5b220477045b 100 }
jont 2:5b220477045b 101 }
jont 2:5b220477045b 102
jont 2:5b220477045b 103 /*==============================================================*/
jont 2:5b220477045b 104 /* LcdCursorNRight */
jont 2:5b220477045b 105 /*==============================================================*/
jont 2:5b220477045b 106 void LcdCursorNRight(int number)
jont 2:5b220477045b 107 {
jont 2:5b220477045b 108 for (int n=0; n< number; n++)
jont 2:5b220477045b 109 {
jont 2:5b220477045b 110 LcdCursorRight();
jont 2:5b220477045b 111 }
jont 2:5b220477045b 112 }
jont 2:5b220477045b 113
jont 2:5b220477045b 114 /*==============================================================*/
jont 2:5b220477045b 115 /* LcdNLeft */
jont 2:5b220477045b 116 /*==============================================================*/
jont 2:5b220477045b 117 void LcdCursorNLeft(int number)
jont 2:5b220477045b 118
jont 2:5b220477045b 119 {
jont 2:5b220477045b 120 for (int n=0; n< number; n++)
jont 2:5b220477045b 121 {
jont 2:5b220477045b 122 LcdCursorLeft();
jont 2:5b220477045b 123 }
jont 2:5b220477045b 124 }
jont 2:5b220477045b 125
jont 2:5b220477045b 126
jont 2:5b220477045b 127 /*==============================================================*/
jont 2:5b220477045b 128 /* LcdClearTop */
jont 2:5b220477045b 129 /*==============================================================*/
jont 2:5b220477045b 130 void LcdClearTop(void)
jont 2:5b220477045b 131 {
jont 2:5b220477045b 132 LcdHomeTop();
jont 2:5b220477045b 133 LcdNSpace(0x27);
jont 2:5b220477045b 134 LcdHomeTop();
jont 2:5b220477045b 135
jont 2:5b220477045b 136 }
jont 2:5b220477045b 137
jont 2:5b220477045b 138 /*==============================================================*/
jont 2:5b220477045b 139 /* LcdClearBottom */
jont 2:5b220477045b 140 /*==============================================================*/
jont 2:5b220477045b 141 void LcdClearBottom(void)
jont 2:5b220477045b 142 {
jont 2:5b220477045b 143 LcdHomeBottom();
jont 2:5b220477045b 144 LcdNSpace(0x27);
jont 2:5b220477045b 145 LcdHomeBottom();
jont 2:5b220477045b 146
jont 2:5b220477045b 147 }
jont 2:5b220477045b 148
jont 2:5b220477045b 149 /*==============================================================*/
jont 2:5b220477045b 150 /* LcdPositionBottom */
jont 2:5b220477045b 151 /*==============================================================*/
jont 2:5b220477045b 152 void LcdPositionBottom(int pos)
jont 2:5b220477045b 153
jont 2:5b220477045b 154 {
jont 2:5b220477045b 155 LcdSetAddress(LCDBOTTOMSTART + pos);
jont 2:5b220477045b 156
jont 2:5b220477045b 157 }
jont 2:5b220477045b 158
jont 2:5b220477045b 159 /*==============================================================*/
jont 2:5b220477045b 160 /* LcdPositionTop */
jont 2:5b220477045b 161 /*==============================================================*/
jont 2:5b220477045b 162 void LcdPositionTop(int pos)
jont 2:5b220477045b 163
jont 2:5b220477045b 164 {
jont 2:5b220477045b 165 LcdSetAddress(LCDTOPSTART + pos);
jont 2:5b220477045b 166 }
jont 2:5b220477045b 167
jont 2:5b220477045b 168
jont 2:5b220477045b 169 /*==============================================================*/
jont 2:5b220477045b 170 /* LcdCursorFlash */
jont 2:5b220477045b 171 /*==============================================================*/
jont 2:5b220477045b 172 void LcdCursorFlash(void)
jont 2:5b220477045b 173 {
jont 2:5b220477045b 174 //LcdReady();
jont 2:5b220477045b 175 write_E_port(LCDCONTROL, 0x0d);
jont 2:5b220477045b 176 }
jont 2:5b220477045b 177
jont 2:5b220477045b 178 /*==============================================================*/
jont 2:5b220477045b 179 /* LcdCursorOff */
jont 2:5b220477045b 180 /*==============================================================*/
jont 2:5b220477045b 181 void LcdCursorOff(void)
jont 2:5b220477045b 182 {
jont 2:5b220477045b 183 // LcdReady();
jont 2:5b220477045b 184 write_E_port(LCDCONTROL, 0x0c);
jont 2:5b220477045b 185 }
jont 2:5b220477045b 186
jont 2:5b220477045b 187
jont 2:5b220477045b 188 /*==============================================================*/
jont 2:5b220477045b 189 /* LcdCursorNorm */
jont 2:5b220477045b 190 /*==============================================================*/
jont 2:5b220477045b 191 void LcdCursorNorm(void)
jont 2:5b220477045b 192 {
jont 2:5b220477045b 193 // LcdReady();
jont 2:5b220477045b 194 write_E_port(LCDCONTROL, 0x0e);
jont 2:5b220477045b 195 }
jont 2:5b220477045b 196
jont 2:5b220477045b 197
jont 2:5b220477045b 198
jont 2:5b220477045b 199
jont 2:5b220477045b 200
jont 2:5b220477045b 201 /*
jont 2:5b220477045b 202
jont 2:5b220477045b 203 void read_E_port(unsigned char command)
jont 2:5b220477045b 204 {
jont 2:5b220477045b 205 i2c.start();
jont 2:5b220477045b 206 i2c.write(Slave);
jont 2:5b220477045b 207 i2c.write(command);
jont 2:5b220477045b 208 i2c.stop();
jont 2:5b220477045b 209 wait(0.2);
jont 2:5b220477045b 210 }
jont 2:5b220477045b 211 */
jont 2:5b220477045b 212
jont 2:5b220477045b 213 void write_E_port(unsigned char command,unsigned char data)
jont 2:5b220477045b 214 {
jont 2:5b220477045b 215 i2c.start();
jont 2:5b220477045b 216 i2c.write(Slave);
jont 2:5b220477045b 217 i2c.write(command);
jont 2:5b220477045b 218 i2c.write(data);
jont 2:5b220477045b 219 i2c.stop();
jont 2:5b220477045b 220 wait(0.01);
jont 2:5b220477045b 221 }
jont 2:5b220477045b 222
jont 2:5b220477045b 223 void LcdInit()
jont 0:8f724a47a820 224 {
jont 0:8f724a47a820 225
jont 0:8f724a47a820 226 i2c.start();
jont 0:8f724a47a820 227 i2c.write(Slave);
jont 0:8f724a47a820 228 i2c.write(0x00);
jont 0:8f724a47a820 229 i2c.write(0x38);
jont 0:8f724a47a820 230 wait(0.01);
jont 0:8f724a47a820 231 i2c.write(0x39); //i assume now we juyst need data?
jont 0:8f724a47a820 232 wait(0.01);
jont 0:8f724a47a820 233 i2c.write(0x14);
jont 0:8f724a47a820 234 i2c.write(0x74);
jont 0:8f724a47a820 235 i2c.write(0x54);
jont 0:8f724a47a820 236 i2c.write(0x6f);
jont 0:8f724a47a820 237 i2c.write(0x0c);
jont 0:8f724a47a820 238 i2c.write(0x01);
jont 0:8f724a47a820 239 i2c.write(0x06);
jont 0:8f724a47a820 240 wait(0.01);
jont 0:8f724a47a820 241 i2c.stop();
jont 0:8f724a47a820 242
jont 0:8f724a47a820 243
jont 0:8f724a47a820 244 }
jont 2:5b220477045b 245 /*
jont 0:8f724a47a820 246 void lcdclear()
jont 0:8f724a47a820 247 {
jont 0:8f724a47a820 248 i2c.start();
jont 0:8f724a47a820 249 i2c.write(Slave);
jont 0:8f724a47a820 250 i2c.write(0x00);
jont 0:8f724a47a820 251 i2c.write(0x01);
jont 0:8f724a47a820 252 i2c.stop();
jont 0:8f724a47a820 253 wait(0.2);
jont 0:8f724a47a820 254 }
jont 2:5b220477045b 255 */
jont 0:8f724a47a820 256 void test()
jont 0:8f724a47a820 257 {
jont 0:8f724a47a820 258
jont 0:8f724a47a820 259 i2c.start();
jont 0:8f724a47a820 260 i2c.write(Slave);
jont 0:8f724a47a820 261 i2c.stop();
jont 0:8f724a47a820 262 wait(0.2);
jont 0:8f724a47a820 263 }
jont 0:8f724a47a820 264
jont 0:8f724a47a820 265
jont 2:5b220477045b 266 void LcdWriteText(char *text)
jont 0:8f724a47a820 267 {
jont 1:2ded47079af1 268 int n;//,d;
jont 1:2ded47079af1 269 //d=0x00;
jont 0:8f724a47a820 270 int length = strlen(text);
jont 0:8f724a47a820 271 i2c.start();
jont 0:8f724a47a820 272 i2c.write(Slave); //Slave=0x78
jont 2:5b220477045b 273 i2c.write(LCDDATA);//Datasend=0x40
jont 0:8f724a47a820 274 for(n=0;n<length;n++){
jont 0:8f724a47a820 275 i2c.write(*text);
jont 0:8f724a47a820 276 ++text;
jont 0:8f724a47a820 277 }
jont 0:8f724a47a820 278 i2c.stop();
jont 2:5b220477045b 279 }
jont 2:5b220477045b 280
jont 2:5b220477045b 281 /*==============================================================*/
jont 2:5b220477045b 282 /* attemp at lcdlcdprintf */
jont 2:5b220477045b 283 /*==============================================================*/
jont 2:5b220477045b 284
jont 2:5b220477045b 285 static void lcdputchar(char c, void *ptr)
jont 2:5b220477045b 286 {
jont 2:5b220477045b 287 //LcdReady(); /* wait for lcd ready */
jont 2:5b220477045b 288 write_E_port(LCDDATA, c); /* send data to lcd */
jont 2:5b220477045b 289 }
jont 2:5b220477045b 290 /*
jont 2:5b220477045b 291 int lcdprintf(const char *format, ...)
jont 2:5b220477045b 292 {
jont 2:5b220477045b 293 va_list ap;
jont 2:5b220477045b 294 int nr_of_chars;
jont 2:5b220477045b 295 va_start (ap, format); //variable arg begin
jont 2:5b220477045b 296 nr_of_chars = _formatted_write (format, lcdputchar, (void *) 0, ap);
jont 2:5b220477045b 297 va_end(ap); //variable arg end
jont 2:5b220477045b 298 return(nr_of_chars);
jont 2:5b220477045b 299 } */
jont 2:5b220477045b 300