Fork of Ds3231 library that replaces inheritance of I2C class with a private member var of type I2C *
Dependents: ard2pmod DS3231_Alarm_Demo MAXREFDES130_131_Demo MAXREFDES130_Demo
Fork of ds3231 by
ds3231.cpp
- Committer:
- j3
- Date:
- 2016-08-21
- Revision:
- 16:e1c0f63595d9
- Parent:
- 15:16ca4c747252
File content as of revision 16:e1c0f63595d9:
/******************************************************************//** * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. **********************************************************************/ #include "ds3231.h" #define DS3231_I2C_ADRS 0x68 #define I2C_WRITE 0 #define I2C_READ 1 #define AM_PM (1 << 5) #define MODE (1 << 6) #define DY_DT (1 << 6) #define ALRM_MASK (1 << 7) //control register bit masks #define A1IE (1 << 0) #define A2IE (1 << 1) #define INTCN (1 << 2) #define RS1 (1 << 3) #define RS2 (1 << 4) #define CONV (1 << 5) #define BBSQW (1 << 6) #define EOSC (1 << 7) //status register bit masks #define A1F (1 << 0) #define A2F (1 << 1) #define BSY (1 << 2) #define EN32KHZ (1 << 3) #define OSF (1 << 7) //********************************************************************* Ds3231::Ds3231(PinName sda, PinName scl) :_p_i2c(new I2C(sda, scl)), _i2c_owner(true), _w_adrs((DS3231_I2C_ADRS << 1) | I2C_WRITE), _r_adrs((DS3231_I2C_ADRS << 1) | I2C_READ) { } //********************************************************************* Ds3231::Ds3231(I2C & i2c_bus) :_p_i2c(&i2c_bus), _i2c_owner(false), _w_adrs((DS3231_I2C_ADRS << 1) | I2C_WRITE), _r_adrs((DS3231_I2C_ADRS << 1) | I2C_READ) { } //********************************************************************* Ds3231::~Ds3231() { if(_i2c_owner) { delete _p_i2c; } } //********************************************************************* uint16_t Ds3231::set_time(ds3231_time_t time) { uint8_t data[] = {0,0,0,0}; uint8_t data_length = 0; uint8_t max_hour = 24; data[data_length++] = SECONDS; data[data_length++] = uchar_2_bcd(time.seconds); data[data_length++] = uchar_2_bcd(time.minutes); //format Hours register data[data_length] = uchar_2_bcd(time.hours); if(time.mode) { max_hour = max_hour/2; data[data_length] |= MODE; if(time.am_pm) { data[data_length] |= AM_PM; } } else { max_hour = max_hour - 1; } data_length++; //Make sure data is within range. if((time.seconds > 59) || (time.minutes > 59) || (time.hours > max_hour)) { return(1); } else { return(_p_i2c->write(_w_adrs,(const char*) data, data_length)); } } //********************************************************************* uint16_t Ds3231::set_calendar(ds3231_calendar_t calendar) { uint8_t data[] = {0,0,0,0,0}; uint8_t data_length = 0; data[data_length++] = DAY; data[data_length++] = uchar_2_bcd(calendar.day); data[data_length++] = uchar_2_bcd(calendar.date); data[data_length++] = uchar_2_bcd(calendar.month); data[data_length++] = uchar_2_bcd(calendar.year); //Make sure data is within range. if(((calendar.day < 1) || (calendar.day > 7)) || ((calendar.date < 1) || (calendar.date > 31)) || ((calendar.month < 1) || (calendar.month > 12)) || (calendar.year > 99)) { return(1); } else { return(_p_i2c->write(_w_adrs,(const char*) data, data_length)); } } //********************************************************************* uint16_t Ds3231::set_alarm(ds3231_alrm_t alarm, bool one_r_two) { uint8_t data[] = {0,0,0,0,0}; uint8_t data_length = 0; uint8_t max_hour = 24; uint8_t mask_var = 0; //setting alarm 1 or 2? if(one_r_two) { data[data_length++] = ALRM1_SECONDS; //config seconds register if(alarm.am1) { mask_var |= ALRM_MASK; } data[data_length++] = (mask_var | uchar_2_bcd(alarm.seconds)); mask_var = 0; //config minutes register if(alarm.am2) { mask_var |= ALRM_MASK; } data[data_length++] = (mask_var | uchar_2_bcd(alarm.minutes)); mask_var = 0; //config hours register if(alarm.am3) { mask_var |= ALRM_MASK; } if(alarm.mode) { max_hour = max_hour/2; mask_var |= MODE; if(alarm.am_pm) { mask_var |= AM_PM; } } else { max_hour = max_hour - 1; } data[data_length++] = (mask_var | uchar_2_bcd(alarm.hours)); mask_var = 0; //config day/date register if(alarm.am4) { mask_var |= ALRM_MASK; } if(alarm.dy_dt) { mask_var |= DY_DT; data[data_length++] = (mask_var | uchar_2_bcd(alarm.day)); } else { data[data_length++] = (mask_var | uchar_2_bcd(alarm.date)); } mask_var = 0; } else { data[data_length++] = ALRM2_MINUTES; //config minutes register if(alarm.am2) { mask_var |= ALRM_MASK; } data[data_length++] = (mask_var | uchar_2_bcd(alarm.minutes)); mask_var = 0; //config hours register if(alarm.am3) { mask_var |= ALRM_MASK; } if(alarm.mode) { max_hour = max_hour/2; mask_var |= MODE; if(alarm.am_pm) { mask_var |= AM_PM; } } else { max_hour = max_hour - 1; } data[data_length++] = (mask_var | uchar_2_bcd(alarm.hours)); mask_var = 0; //config day/date register if(alarm.am4) { mask_var |= ALRM_MASK; } if(alarm.dy_dt) { mask_var |= DY_DT; data[data_length++] = (mask_var | uchar_2_bcd(alarm.day)); } else { data[data_length++] = (mask_var | uchar_2_bcd(alarm.date)); } mask_var = 0; } //Make sure data is within range. if((alarm.seconds > 59) || (alarm.minutes > 59) || (alarm.hours > max_hour) || ((alarm.day < 1) || (alarm.day > 7)) || ((alarm.date < 1) || (alarm.date > 31))) { return(1); } else { return(_p_i2c->write(_w_adrs,(const char*) data, data_length)); } } //********************************************************************* uint16_t Ds3231::set_cntl_stat_reg(ds3231_cntl_stat_t data) { uint8_t local_data[] = {0,0,0}; uint8_t data_length = 0; local_data[data_length++] = CONTROL; local_data[data_length++] = data.control; local_data[data_length++] = data.status; //users responsibility to make sure data is logical return(_p_i2c->write(_w_adrs,(const char*) local_data, data_length)); } //********************************************************************* uint16_t Ds3231::get_time(ds3231_time_t* time) { uint16_t rtn_val = 1; uint8_t data[3]; data[0] = SECONDS; rtn_val = _p_i2c->write(_w_adrs, (const char*) data, 1); if(!rtn_val) { rtn_val = _p_i2c->read(_r_adrs,(char *) data, 3); time->seconds = bcd_2_uchar(data[0]); time->minutes = bcd_2_uchar(data[1]); time->am_pm = (data[2]&AM_PM); time->mode = (data[2]&MODE); if(time->mode) { time->hours = bcd_2_uchar((data[2]&0x1F)); } else { time->hours = bcd_2_uchar((data[2]&0x3F)); } } return(rtn_val); } //********************************************************************* uint16_t Ds3231::get_calendar(ds3231_calendar_t* calendar) { uint16_t rtn_val = 1; uint8_t data[4]; data[0] = DAY; rtn_val = _p_i2c->write(_w_adrs, (const char*) data, 1); if(!rtn_val) { rtn_val = _p_i2c->read(_r_adrs,(char *) data, 4); calendar->day = bcd_2_uchar(data[0]); calendar->date = bcd_2_uchar(data[1]); calendar->month = bcd_2_uchar((data[2]&0x1F)); calendar->year = bcd_2_uchar(data[3]); } return(rtn_val); } //********************************************************************* uint16_t Ds3231::get_alarm(ds3231_alrm_t* alarm, bool one_r_two) { uint16_t rtn_val = 1; uint8_t data[4]; if(one_r_two) { data[0] = ALRM1_SECONDS; rtn_val = _p_i2c->write(_w_adrs, (const char*) data, 1); if(!rtn_val) { rtn_val = _p_i2c->read(_r_adrs,(char *) data, 4); alarm->seconds = bcd_2_uchar(data[0]&0x7F); alarm->am1 = (data[0]&ALRM_MASK); alarm->minutes = bcd_2_uchar(data[1]&0x7F); alarm->am2 = (data[1]&ALRM_MASK); alarm->am3 = (data[2]&ALRM_MASK); alarm->am_pm = (data[2]&AM_PM); alarm->mode = (data[2]&MODE); if(alarm->mode) { alarm->hours = bcd_2_uchar((data[2]&0x1F)); } else { alarm->hours = bcd_2_uchar((data[2]&0x3F)); } if(data[3] & DY_DT) { alarm->dy_dt = 1; alarm->day = bcd_2_uchar(data[3]&0x0F); } else { alarm->date = bcd_2_uchar(data[3]&0x3F); } alarm->am4 = (data[3]&ALRM_MASK); } } else { data[0] = ALRM2_MINUTES; rtn_val = _p_i2c->write(_w_adrs, (const char*) data, 1); if(!rtn_val) { rtn_val = _p_i2c->read(_r_adrs,(char *) data, 4); alarm->minutes = bcd_2_uchar(data[0]&0x7F); alarm->am2 = (data[0]&ALRM_MASK); alarm->am3 = (data[1]&ALRM_MASK); alarm->am_pm = (data[1]&AM_PM); alarm->mode = (data[1]&MODE); if(alarm->mode) { alarm->hours = bcd_2_uchar((data[1]&0x1F)); } else { alarm->hours = bcd_2_uchar((data[1]&0x3F)); } if(data[2] & DY_DT) { alarm->dy_dt = 1; alarm->day = bcd_2_uchar(data[2]&0x0F); } else { alarm->date = bcd_2_uchar(data[2]&0x3F); } alarm->am4 = (data[2]&ALRM_MASK); } } return(rtn_val); } //********************************************************************* uint16_t Ds3231::get_cntl_stat_reg(ds3231_cntl_stat_t* data) { uint16_t rtn_val = 1; uint8_t local_data[2]; local_data[0] = CONTROL; rtn_val = _p_i2c->write(_w_adrs, (const char*) local_data, 1); if(!rtn_val) { rtn_val = _p_i2c->read(_r_adrs,(char *) local_data, 2); data->control = local_data[0]; data->status = local_data[1]; } return(rtn_val); } //********************************************************************* uint16_t Ds3231::get_temperature(void) { uint16_t rtn_val = 1; uint8_t data[2]; data[0] = MSB_TEMP; rtn_val = _p_i2c->write(_w_adrs, (const char*) data, 1); if(!rtn_val) { _p_i2c->read(_r_adrs,(char *) data, 2); rtn_val = data[0] << 8; rtn_val |= data[1]; } return(rtn_val); } //********************************************************************* time_t Ds3231::get_epoch(void) { //system vars struct tm sys_time; //RTC vars ds3231_time_t rtc_time = {0,0,0,0,0}; ds3231_calendar_t rtc_calendar = {0,0,0,0}; get_calendar(&rtc_calendar); get_time(&rtc_time); sys_time.tm_wday = rtc_calendar.day - 1; sys_time.tm_mday = rtc_calendar.date; sys_time.tm_mon = rtc_calendar.month - 1; sys_time.tm_year = rtc_calendar.year + 100; //check for 12hr or 24hr mode if(rtc_time.mode) { //check am/pm if(rtc_time.am_pm && (rtc_time.hours != 12)) { sys_time.tm_hour = rtc_time.hours + 12; } else { sys_time.tm_hour = rtc_time.hours; } } else { //24hr mode sys_time.tm_hour = rtc_time.hours; } sys_time.tm_min = rtc_time.minutes; sys_time.tm_sec = rtc_time.seconds; //make epoch time return(mktime(&sys_time)); } //********************************************************************* uint16_t Ds3231::uchar_2_bcd(uint8_t data) { uint16_t bcd_result = 0; //Get hundreds bcd_result |= ((data/100) << 8); data = (data - (data/100)*100); //Get tens bcd_result |= ((data/10) << 4); data = (data - (data/10)*10); //Get ones bcd_result |= data; return(bcd_result); } //********************************************************************* uint8_t Ds3231::bcd_2_uchar(uint8_t bcd) { uint8_t rtn_val = 0; rtn_val += ((bcd&0xf0)>>4)*10; rtn_val += (bcd&0x000f); return rtn_val; }