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DS1307 clock support

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This commit is contained in:
Asbelos 2024-11-30 13:11:43 +00:00
parent e7eff7ef56
commit 9bf90bf1fd
4 changed files with 235 additions and 15 deletions
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16
IODevice.h
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@ -559,20 +559,6 @@ protected:
};
#include "IO_MCP23008.h"
#include "IO_MCP23017.h"
#include "IO_PCF8574.h"
#include "IO_PCF8575.h"
#include "IO_PCA9555.h"
#include "IO_duinoNodes.h"
#include "IO_EXIOExpander.h"
#include "IO_trainbrains.h"
#include "IO_EncoderThrottle.h"
#include "IO_TCA8418.h"
#include "IO_NeoPixel.h"
#include "IO_I2CRailcom.h"
#include "IO_TM1638.h"
#include "IO_EXSensorCAM.h"
#include "IODeviceList.h"
#endif // iodevice_h

37
IODeviceList.h Normal file
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/*
* © 2024, Chris Harlow. All rights reserved.
*
* This file is part of CommandStation-EX
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
/*
This is the list of HAL drivers automatically included by IODevice.h
It has been moved here to be easier to maintain than editing IODevice.h
*/
#include "IO_MCP23008.h"
#include "IO_MCP23017.h"
#include "IO_PCF8574.h"
#include "IO_PCF8575.h"
#include "IO_PCA9555.h"
#include "IO_duinoNodes.h"
#include "IO_EXIOExpander.h"
#include "IO_trainbrains.h"
#include "IO_EncoderThrottle.h"
#include "IO_TCA8418.h"
#include "IO_NeoPixel.h"
#include "IO_I2CRailcom.h"
#include "IO_TM1638.h"
#include "IO_EXSensorCAM.h"
#include "IO_DS1307.h"

143
IO_DS1307.cpp Normal file
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/*
* © 2024, Chris Harlow. All rights reserved.
*
* This file is part of CommandStation-EX
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
/*
* The IO_DS1307 device driver is used to interface a standalone realtime clock.
* The clock will announce every minute (which will trigger EXRAIL ONTIME events).
* Seconds, and Day/date info is ignored, except that the announced hhmm time
* will attempt to synchronize with the 0 seconds of the clock.
* An analog read in EXRAIL (IFGTE(vpin, value) etc will check against the hh*60+mm time.
* The clock can be easily set by an analog write to the vpin using 24 hr clock time
* with the command <z vpin hh mm ss>
*/
#include "IO_DS1307.h"
#include "I2CManager.h"
#include "DIAG.h"
#include "CommandDistributor.h"
uint8_t d2b(uint8_t d) {
return (d >> 4)*10 + (d & 0x0F);
}
void DS1307::create(VPIN vpin, I2CAddress i2cAddress) {
if (checkNoOverlap(vpin, 1, i2cAddress)) new DS1307(vpin, i2cAddress);
}
// Constructor
DS1307::DS1307(VPIN vpin,I2CAddress i2cAddress){
_firstVpin = vpin;
_nPins = 1;
_I2CAddress = i2cAddress;
addDevice(this);
}
uint32_t DS1307::getTime() {
// Obtain ss,mm,hh buffers from device
uint8_t readBuffer[3];
const uint8_t writeBuffer[1]={0};
// address register 0 for read.
I2CManager.write(_I2CAddress, writeBuffer, 1);
if (I2CManager.read(_I2CAddress, readBuffer, 3) != I2C_STATUS_OK) {
_deviceState=DEVSTATE_FAILED;
return 0;
}
_deviceState=DEVSTATE_NORMAL;
if (debug) {
static const char hexchars[]="0123456789ABCDEF";
USB_SERIAL.print(F("<*RTC"));
for (int i=2;i>=0;i--) {
USB_SERIAL.write(' ');
USB_SERIAL.write(hexchars[readBuffer[i]>>4]);
USB_SERIAL.write(hexchars[readBuffer[i]& 0x0F ]);
}
StringFormatter::send(&USB_SERIAL,F(" %d *>\n"),_deviceState);
}
if (readBuffer[0] & 0x80) {
_deviceState=DEVSTATE_INITIALISING;
DIAG(F("DS1307 clock in standby"));
return 0; // clock is not running
}
// convert device format to seconds since midnight
uint8_t ss=d2b(readBuffer[0] & 0x7F);
uint8_t mm=d2b(readBuffer[1]);
uint8_t hh=d2b(readBuffer[2] & 0x3F);
return (hh*60ul +mm)*60ul +ss;
}
void DS1307::_begin() {
// Initialise device and sync loop() to zero seconds
I2CManager.begin();
auto tstamp=getTime();
if (_deviceState==DEVSTATE_NORMAL) {
byte seconds=tstamp%60;
delayUntil(micros() + ((60-seconds) * 1000000));
}
_display();
}
// Processing loop to obtain clock time.
// This self-synchronizes to the next minute tickover
void DS1307::_loop(unsigned long currentMicros) {
auto time=getTime();
if (_deviceState==DEVSTATE_NORMAL) {
byte ss=time%60;
CommandDistributor::setClockTime(time/60, 1, 1);
delayUntil(currentMicros + ((60-ss) * 1000000));
}
}
// Display device driver info.
void DS1307::_display() {
auto tstamp=getTime();
byte ss=tstamp%60;
tstamp/=60;
byte mm=tstamp%60;
byte hh=tstamp/60;
DIAG(F("DS1307 on I2C:%s vpin %d %d:%d:%d %S"),
_I2CAddress.toString(), _firstVpin,
hh,mm,ss,
(_deviceState==DEVSTATE_FAILED) ? F("OFFLINE") : F(""));
}
// allow user to set the clock
void DS1307::_writeAnalogue(VPIN vpin, int hh, uint8_t mm, uint16_t ss) {
(void) vpin;
uint8_t writeBuffer[3];
writeBuffer[0]=1; // write mm,hh first
writeBuffer[1]=((mm/10)<<4) + (mm % 10);
writeBuffer[2]=((hh/10)<<4) + (hh % 10);
I2CManager.write(_I2CAddress, writeBuffer, 3);
writeBuffer[0]=0; // write ss
writeBuffer[1]=((ss/10)<<4) + (ss % 10);
I2CManager.write(_I2CAddress, writeBuffer, 2);
_loop(micros()); // resync with seconds rollover
}
// Method to read analogue hh*60+mm time
int DS1307::_readAnalogue(VPIN vpin) {
(void)vpin;
return getTime()/60;
};

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IO_DS1307.h Normal file
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/*
* © 2024, Chris Harlow. All rights reserved.
*
* This file is part of CommandStation-EX
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
/*
* The IO_DS1307 device driver is used to interface a standalone realtime clock.
* The clock will announce every minute (which will trigger EXRAIL ONTIME events).
* Seconds, and Day/date info is ignored, except that the announced hhmm time
* will attempt to synchronize with the 0 seconds of the clock.
* An analog read in EXRAIL (IFGTE(vpin, value) etc will check against the hh*60+mm time.
* The clock can be easily set by an analog write to the vpin using 24 hr clock time
* with the command <z vpin hh mm ss>
*/
#ifndef IO_DS1307_h
#define IO_DS1307_h
#include "IODevice.h"
class DS1307 : public IODevice {
public:
static const bool debug=false;
static void create(VPIN vpin, I2CAddress i2cAddress);
private:
// Constructor
DS1307(VPIN vpin,I2CAddress i2cAddress);
uint32_t getTime();
void _begin() override;
void _display() override;
void _loop(unsigned long currentMicros) override;
int _readAnalogue(VPIN vpin) override;
void _writeAnalogue(VPIN vpin, int hh, uint8_t mm, uint16_t ss) override;
};
#endif