Roger Zuber / DS1307

Demo Clock with Nucleo-F303RE and Starter Shield

Dependents:   Nucleo_StarterShileld_Clock

ds1307.cpp@0:a60e31060229, 2017-05-18 (annotated)

Committer:
rogerzuber
Date:
Thu May 18 08:03:02 2017 +0000
Revision:
0:a60e31060229
Demo Clock with Nucleo-F303RE and Starter Shield

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rogerzuber 0:a60e31060229 1 #include "ds1307.h"
rogerzuber 0:a60e31060229 2
rogerzuber 0:a60e31060229 3 DS1307::DS1307(PinName sda, PinName scl ) : ds1307i2c(sda,scl) {
rogerzuber 0:a60e31060229 4 ds1307i2c.frequency(DS1307_freq);
rogerzuber 0:a60e31060229 5 }
rogerzuber 0:a60e31060229 6
rogerzuber 0:a60e31060229 7 DS1307::~DS1307() {
rogerzuber 0:a60e31060229 8 }
rogerzuber 0:a60e31060229 9
rogerzuber 0:a60e31060229 10 int DS1307::read( int addr, int quantity, char *data) {
rogerzuber 0:a60e31060229 11 // note the char array at data must contain 63 locations or unpredictable behavior will happen
rogerzuber 0:a60e31060229 12 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
rogerzuber 0:a60e31060229 13 // quantity must be 1 - 63 as the 64th ram location is clobered in this method of access
rogerzuber 0:a60e31060229 14 int test = 0 ;
rogerzuber 0:a60e31060229 15 char temp_data[65];
rogerzuber 0:a60e31060229 16
rogerzuber 0:a60e31060229 17 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
rogerzuber 0:a60e31060229 18 if (addr < 0 ) return (1); // fail because address less then 0 is not available
rogerzuber 0:a60e31060229 19 if (quantity > DS1307_lastreg) return (1); // fail because quantity greater then what can be read
rogerzuber 0:a60e31060229 20 if ((addr + quantity) > DS1307_lastreg ) return (1); // fail because cant read past reg 63
rogerzuber 0:a60e31060229 21 if ( quantity == 0 ) return (1); // fail because zero quantity wanted
rogerzuber 0:a60e31060229 22 temp_data[0] = DS1307_lastreg ; // note this ram location is used to set the addressing pointer in DS1307
rogerzuber 0:a60e31060229 23 temp_data[1] = 0; // just junk to clober this address with
rogerzuber 0:a60e31060229 24 test = ds1307i2c.write(DS1307_addr,temp_data,2);
rogerzuber 0:a60e31060229 25 if (test == 1) return (1); // the write operation failed
rogerzuber 0:a60e31060229 26 // ds1307i2c.stop(); // now the DS1307 is pointing to the first register
rogerzuber 0:a60e31060229 27 if ( addr != 0 ) test = ds1307i2c.read(DS1307_addr,temp_data,addr); // now the DS1307 address pointer is pointing to correct address
rogerzuber 0:a60e31060229 28 if (test == 1) return (1); // the read operation failed
rogerzuber 0:a60e31060229 29 test = ds1307i2c.read(DS1307_addr,data,quantity); // read the DS1307 registers now
rogerzuber 0:a60e31060229 30 if (test == 1) return (1); // read operation failed
rogerzuber 0:a60e31060229 31 return(0); // looks like the data read was good
rogerzuber 0:a60e31060229 32 }
rogerzuber 0:a60e31060229 33
rogerzuber 0:a60e31060229 34 int DS1307::read(int addr, int *data) {
rogerzuber 0:a60e31060229 35 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
rogerzuber 0:a60e31060229 36 int test = 0;
rogerzuber 0:a60e31060229 37 char temp_data[65];
rogerzuber 0:a60e31060229 38 test = DS1307::read(addr, 1, &temp_data[0]);
rogerzuber 0:a60e31060229 39 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 40 *data = (int)temp_data[0]; // returing the read data by pointer
rogerzuber 0:a60e31060229 41 return (0); // the single read is successfull
rogerzuber 0:a60e31060229 42 }
rogerzuber 0:a60e31060229 43
rogerzuber 0:a60e31060229 44 int DS1307::write( int addr, int quantity, char *data) {
rogerzuber 0:a60e31060229 45 // note the char array at data must contain 63 locations or unpredictable behavior will happen
rogerzuber 0:a60e31060229 46 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
rogerzuber 0:a60e31060229 47 // quantity must be 1 - 63 as the 64th ram location is clobered in this method of access
rogerzuber 0:a60e31060229 48 int test = 0 ;
rogerzuber 0:a60e31060229 49 char temp_data[65] ;
rogerzuber 0:a60e31060229 50 int loop = 0;
rogerzuber 0:a60e31060229 51
rogerzuber 0:a60e31060229 52 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
rogerzuber 0:a60e31060229 53 if (addr < 0 ) return (1); // fail because address less then 0 is not available
rogerzuber 0:a60e31060229 54 if (quantity > DS1307_lastreg) return (1); // fail because quantity greater then what can be read
rogerzuber 0:a60e31060229 55 if (quantity == 0) return (1); // fail because zero quantity is wanted
rogerzuber 0:a60e31060229 56 if ((addr + quantity) > DS1307_lastreg ) return (1); // fail because cant read past reg 63
rogerzuber 0:a60e31060229 57
rogerzuber 0:a60e31060229 58 temp_data[0] = (char)addr;
rogerzuber 0:a60e31060229 59 for ( ; loop < quantity ; loop++ ) {
rogerzuber 0:a60e31060229 60 temp_data[loop+1] = *(data + loop);
rogerzuber 0:a60e31060229 61 }
rogerzuber 0:a60e31060229 62 test = ds1307i2c.write(DS1307_addr, temp_data, (quantity + 1));
rogerzuber 0:a60e31060229 63 // ds1307i2c.stop();
rogerzuber 0:a60e31060229 64 return(test); // 0 for success 1 for failure to write
rogerzuber 0:a60e31060229 65 }
rogerzuber 0:a60e31060229 66
rogerzuber 0:a60e31060229 67 int DS1307::write( int addr, int data ) {
rogerzuber 0:a60e31060229 68 // addr must be 0 - 62 as the 64th(or 63rd as indexed from 0) ram location is clobered in this method of access
rogerzuber 0:a60e31060229 69 int test = 0 ;
rogerzuber 0:a60e31060229 70 char temp_data[2] ;
rogerzuber 0:a60e31060229 71
rogerzuber 0:a60e31060229 72 temp_data[0] = (char)addr;
rogerzuber 0:a60e31060229 73 temp_data[1] = (char)data;
rogerzuber 0:a60e31060229 74 if (addr > DS1307_lastram) return (1); // fail because address greater then what chip has to read from
rogerzuber 0:a60e31060229 75 if (addr < 0 ) return (1); // fail because address less then 0 is not available
rogerzuber 0:a60e31060229 76 test = ds1307i2c.write(DS1307_addr, temp_data, 2);
rogerzuber 0:a60e31060229 77 // ds1307i2c.stop();
rogerzuber 0:a60e31060229 78 return(test);
rogerzuber 0:a60e31060229 79 }
rogerzuber 0:a60e31060229 80
rogerzuber 0:a60e31060229 81 int DS1307::start_clock(void) { // start the clock
rogerzuber 0:a60e31060229 82 int test = 0;
rogerzuber 0:a60e31060229 83 int junk = 0;
rogerzuber 0:a60e31060229 84
rogerzuber 0:a60e31060229 85 test = DS1307::read(DS1307_sec, &junk);
rogerzuber 0:a60e31060229 86 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 87 junk = ( 0x7F & junk); // basicaly i mask bit 8 to set it to zero
rogerzuber 0:a60e31060229 88 test = DS1307::write(DS1307_sec,junk); // now write the seconds back to register and because bit 8 is zero this starts clock.
rogerzuber 0:a60e31060229 89 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 90 return(test); //
rogerzuber 0:a60e31060229 91 }
rogerzuber 0:a60e31060229 92
rogerzuber 0:a60e31060229 93 int DS1307::stop_clock(void) { // stop clock
rogerzuber 0:a60e31060229 94 int test = 0;
rogerzuber 0:a60e31060229 95 int junk = 0;
rogerzuber 0:a60e31060229 96
rogerzuber 0:a60e31060229 97 test = DS1307::read(DS1307_sec, &junk);
rogerzuber 0:a60e31060229 98 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 99 junk = ( 0x7F & junk); // basicaly i mask bit 8 to set it to zero but keep all other bits
rogerzuber 0:a60e31060229 100 junk = ( 0x80 | junk); // basicaly i mask bit 8 to set it to one
rogerzuber 0:a60e31060229 101 test = DS1307::write(DS1307_sec,junk); // now write the seconds back to register and because bit 8 is one this starts clock.
rogerzuber 0:a60e31060229 102 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 103 return(test); //
rogerzuber 0:a60e31060229 104 }
rogerzuber 0:a60e31060229 105
rogerzuber 0:a60e31060229 106 int DS1307::twelve_hour(void) { // set 12 hour mode
rogerzuber 0:a60e31060229 107 int test = 0;
rogerzuber 0:a60e31060229 108 int junk = 0;
rogerzuber 0:a60e31060229 109
rogerzuber 0:a60e31060229 110 test = DS1307::read(DS1307_hour, &junk);
rogerzuber 0:a60e31060229 111 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 112 if ((junk & 0x40) == 0x40) return(0); // return because 12 mode is active now all done!
rogerzuber 0:a60e31060229 113
rogerzuber 0:a60e31060229 114 junk = ( junk & 0x3F); // only use 24 hour time values
rogerzuber 0:a60e31060229 115 if (junk == 0x00)
rogerzuber 0:a60e31060229 116 junk = 0x12;
rogerzuber 0:a60e31060229 117 else if (junk >= 0x13)
rogerzuber 0:a60e31060229 118 if (junk < 0x20) {
rogerzuber 0:a60e31060229 119 junk = junk - 0x12;
rogerzuber 0:a60e31060229 120 junk = (junk | 0x20); // add back the pm indicator
rogerzuber 0:a60e31060229 121 } else
rogerzuber 0:a60e31060229 122 switch (junk) {
rogerzuber 0:a60e31060229 123 case 0x20:
rogerzuber 0:a60e31060229 124 junk = 0x28;
rogerzuber 0:a60e31060229 125 break;
rogerzuber 0:a60e31060229 126 case 0x21:
rogerzuber 0:a60e31060229 127 junk = 0x29;
rogerzuber 0:a60e31060229 128 break;
rogerzuber 0:a60e31060229 129 case 0x22:
rogerzuber 0:a60e31060229 130 junk = 0x30;
rogerzuber 0:a60e31060229 131 break;
rogerzuber 0:a60e31060229 132 case 0x23:
rogerzuber 0:a60e31060229 133 junk = 0x31;
rogerzuber 0:a60e31060229 134 break;
rogerzuber 0:a60e31060229 135 }
rogerzuber 0:a60e31060229 136
rogerzuber 0:a60e31060229 137 test = DS1307::write(DS1307_hour,(0x40 | junk)); // set bit 6 with the new 12 hour time converted from the 24 hour time
rogerzuber 0:a60e31060229 138 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 139
rogerzuber 0:a60e31060229 140 return(0);
rogerzuber 0:a60e31060229 141 }
rogerzuber 0:a60e31060229 142
rogerzuber 0:a60e31060229 143 int DS1307::twentyfour_hour(void) { // set 24 hour mode
rogerzuber 0:a60e31060229 144 int test = 0;
rogerzuber 0:a60e31060229 145 int junk = 0;
rogerzuber 0:a60e31060229 146
rogerzuber 0:a60e31060229 147 test = DS1307::read(DS1307_hour, &junk);
rogerzuber 0:a60e31060229 148 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 149 if ((junk & 0x40) == 0) return(0); // return because 24 mode is active now all done!
rogerzuber 0:a60e31060229 150
rogerzuber 0:a60e31060229 151 junk = (junk & 0xBF); // get value bits and am/pm indicator bit but drop 12/24 hour bit
rogerzuber 0:a60e31060229 152
rogerzuber 0:a60e31060229 153 if (junk > 0x12)
rogerzuber 0:a60e31060229 154 if ( junk <= 0x27 )
rogerzuber 0:a60e31060229 155 junk = junk - 0x0E;
rogerzuber 0:a60e31060229 156 else
rogerzuber 0:a60e31060229 157 junk = junk - 0x08;
rogerzuber 0:a60e31060229 158
rogerzuber 0:a60e31060229 159 test = DS1307::write(DS1307_hour,( 0xBF & junk)); // clear bit 6 and set the new 24 hour time converted from 12 hour time
rogerzuber 0:a60e31060229 160 if (test == 1) return(1); // fail because read to DS1307 failed
rogerzuber 0:a60e31060229 161
rogerzuber 0:a60e31060229 162 return(0);
rogerzuber 0:a60e31060229 163 }
rogerzuber 0:a60e31060229 164
rogerzuber 0:a60e31060229 165 int DS1307::settime(int sec, int min, int hour, int day, int date, int month, int year) { // to set the current time and start clock
rogerzuber 0:a60e31060229 166 // sec = 0 to 59, min = 0 to 59, hours = 0 to 23 ( 24 hour mode only ), day = 1 to 7 ( day of week ), date = 1 to 31, month = 1 to 12, year 0 to 99 ( this is for 2000 to 2099)
rogerzuber 0:a60e31060229 167 DS1307::stop_clock();
rogerzuber 0:a60e31060229 168
rogerzuber 0:a60e31060229 169 if (1 == DS1307::hilow_check( 59, 0, sec)) {
rogerzuber 0:a60e31060229 170 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 171 } else {
rogerzuber 0:a60e31060229 172 if (1 == (DS1307::write(DS1307_sec,DS1307::dectobcd(sec)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 173 }
rogerzuber 0:a60e31060229 174
rogerzuber 0:a60e31060229 175 if (1 == DS1307::hilow_check( 59, 0, min)) {
rogerzuber 0:a60e31060229 176 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 177 } else {
rogerzuber 0:a60e31060229 178 if (1 == (DS1307::write(DS1307_min,DS1307::dectobcd(min)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 179 }
rogerzuber 0:a60e31060229 180
rogerzuber 0:a60e31060229 181 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour format
rogerzuber 0:a60e31060229 182 if (1 == DS1307::hilow_check( 23, 0, hour)) { // note setting 24 hour mode befor and after writing the hour value ensures 24 hour mode is set
rogerzuber 0:a60e31060229 183 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 184 } else {
rogerzuber 0:a60e31060229 185 if (1 == (DS1307::write(DS1307_hour,DS1307::dectobcd(hour)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 186 }
rogerzuber 0:a60e31060229 187 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour format
rogerzuber 0:a60e31060229 188
rogerzuber 0:a60e31060229 189 if (1 == DS1307::hilow_check( 7, 1, day)) {
rogerzuber 0:a60e31060229 190 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 191 } else {
rogerzuber 0:a60e31060229 192 if (1 == (DS1307::write(DS1307_day,DS1307::dectobcd(day)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 193 }
rogerzuber 0:a60e31060229 194
rogerzuber 0:a60e31060229 195 if (1 == DS1307::hilow_check( 31, 1, date)) {
rogerzuber 0:a60e31060229 196 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 197 } else {
rogerzuber 0:a60e31060229 198 if (1 == (DS1307::write(DS1307_date,DS1307::dectobcd(date)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 199 }
rogerzuber 0:a60e31060229 200
rogerzuber 0:a60e31060229 201 if (1 == DS1307::hilow_check( 12, 1, month)) {
rogerzuber 0:a60e31060229 202 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 203 } else {
rogerzuber 0:a60e31060229 204 if (1 == (DS1307::write(DS1307_month,DS1307::dectobcd(month)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 205 }
rogerzuber 0:a60e31060229 206
rogerzuber 0:a60e31060229 207 if (1 == DS1307::hilow_check( 99, 0, year)) {
rogerzuber 0:a60e31060229 208 return(1); // failed because recieved value is not in bounds
rogerzuber 0:a60e31060229 209 } else {
rogerzuber 0:a60e31060229 210 if (1 == (DS1307::write(DS1307_year,DS1307::dectobcd(year)))) return(1); // failed to write for some reason
rogerzuber 0:a60e31060229 211 }
rogerzuber 0:a60e31060229 212
rogerzuber 0:a60e31060229 213 DS1307::start_clock();
rogerzuber 0:a60e31060229 214 return (0); // time is now set
rogerzuber 0:a60e31060229 215 }
rogerzuber 0:a60e31060229 216
rogerzuber 0:a60e31060229 217 int DS1307::gettime(int *sec, int *min, int *hour, int *day, int *date, int *month, int *year) { // to get the current time information
rogerzuber 0:a60e31060229 218 // sec = 0 to 59, min = 0 to 59, hours = 0 to 23 ( 24 hour mode only ), day = 1 to 7 ( day of week ), date = 1 to 31, month = 1 to 12, year 0 to 99 ( this is for 2000 to 2099)
rogerzuber 0:a60e31060229 219 if (1 == DS1307::read(DS1307_sec,sec)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 220 *sec = (*sec & 0x7F ); // drop the clock start stop bit
rogerzuber 0:a60e31060229 221 *sec = DS1307::bcdtodec( *sec); // bcd is now dec value
rogerzuber 0:a60e31060229 222
rogerzuber 0:a60e31060229 223 if (1 == DS1307::read(DS1307_min,min)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 224 *min = (*min & 0x7F ); // drop bit 7 because it should be 0 anyways
rogerzuber 0:a60e31060229 225 *min = DS1307::bcdtodec( *min); // bcd is now dec value
rogerzuber 0:a60e31060229 226
rogerzuber 0:a60e31060229 227 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 228 if ((*hour & 0x40) == 0x40) { // if true then 12 hour mode is set currently so change to 24 hour, read value, and return to 12 hour mode
rogerzuber 0:a60e31060229 229 if (1 == DS1307::twentyfour_hour()) return(1); // failed to set 24 hour mode for some reason
rogerzuber 0:a60e31060229 230 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 231 *hour = (*hour & 0x3F ); // drop bit 7 & 6 they are not used for 24 hour mode reading
rogerzuber 0:a60e31060229 232 *hour = DS1307::bcdtodec( *hour); // bcd is now dec value
rogerzuber 0:a60e31060229 233 if (1 == DS1307::twelve_hour()) return(1); // failed to return to 12 hour mode for some reason
rogerzuber 0:a60e31060229 234 } else { // in 24 hour mode already so just read the hour value
rogerzuber 0:a60e31060229 235 if (1 == DS1307::read(DS1307_hour,hour)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 236 *hour = (*hour & 0x3F ); // drop bit 7 & 6 they are not used for 24 hour mode reading
rogerzuber 0:a60e31060229 237 *hour = DS1307::bcdtodec( *hour); // bcd is now dec value
rogerzuber 0:a60e31060229 238 }
rogerzuber 0:a60e31060229 239
rogerzuber 0:a60e31060229 240 if (1 == DS1307::read(DS1307_day,day)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 241 *day = (*day & 0x07 ); // drop the non used bits
rogerzuber 0:a60e31060229 242 *day = DS1307::bcdtodec( *day); // bcd is now dec value
rogerzuber 0:a60e31060229 243
rogerzuber 0:a60e31060229 244 if (1 == DS1307::read(DS1307_date,date)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 245 *date = (*date & 0x3F ); // drop bit 6 and 7 not used for date value
rogerzuber 0:a60e31060229 246 *date = DS1307::bcdtodec( *date); // bcd is now dec value
rogerzuber 0:a60e31060229 247
rogerzuber 0:a60e31060229 248 if (1 == DS1307::read(DS1307_month,month)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 249 *month = (*month & 0x1F ); // drop bit 5, 6 and 7 not used for month value
rogerzuber 0:a60e31060229 250 *month = DS1307::bcdtodec( *month); // bcd is now dec value
rogerzuber 0:a60e31060229 251
rogerzuber 0:a60e31060229 252 if (1 == DS1307::read(DS1307_year,year)) return(1); // failed to read for some reason
rogerzuber 0:a60e31060229 253 *year = DS1307::bcdtodec( *year); // bcd is now dec value
rogerzuber 0:a60e31060229 254
rogerzuber 0:a60e31060229 255 return (0); // data returned is valid
rogerzuber 0:a60e31060229 256 }
rogerzuber 0:a60e31060229 257
rogerzuber 0:a60e31060229 258
rogerzuber 0:a60e31060229 259 int DS1307::dectobcd( int dec) {
rogerzuber 0:a60e31060229 260 int low = 0;
rogerzuber 0:a60e31060229 261 int high = 0;
rogerzuber 0:a60e31060229 262
rogerzuber 0:a60e31060229 263 high = dec / 10; // this gives the high nibble value
rogerzuber 0:a60e31060229 264 low = dec - (high * 10); // this gives the lower nibble value
rogerzuber 0:a60e31060229 265 return ((high *16) + low); // this is the final bcd value but in interger format
rogerzuber 0:a60e31060229 266 }
rogerzuber 0:a60e31060229 267
rogerzuber 0:a60e31060229 268 int DS1307::bcdtodec( int bcd) {
rogerzuber 0:a60e31060229 269 int low = 0;
rogerzuber 0:a60e31060229 270 int high = 0;
rogerzuber 0:a60e31060229 271
rogerzuber 0:a60e31060229 272 high = bcd / 16;
rogerzuber 0:a60e31060229 273 low = bcd - (high * 16);
rogerzuber 0:a60e31060229 274 return ((high * 10) + low);
rogerzuber 0:a60e31060229 275
rogerzuber 0:a60e31060229 276 }
rogerzuber 0:a60e31060229 277
rogerzuber 0:a60e31060229 278 int DS1307::hilow_check( int hi, int low, int value) {
rogerzuber 0:a60e31060229 279 if ((value >= low)&(value <= hi))
rogerzuber 0:a60e31060229 280 return(0); // value is equal to or inbetween hi and low
rogerzuber 0:a60e31060229 281 else
rogerzuber 0:a60e31060229 282 return(1); // value is not equal to or inbetween hi and low
rogerzuber 0:a60e31060229 283 }
rogerzuber 0:a60e31060229 284
rogerzuber 0:a60e31060229 285
rogerzuber 0:a60e31060229 286
rogerzuber 0:a60e31060229 287