Tasmota/tasmota/xsns_59_ds1624.ino

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/*
xsns_59_ds1624.ino - Support for I2C DS1624 Temperature Sensor
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Copyright (C) 2020 Leonid Myravjev <asm@asm.pp.ru>
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_I2C
#ifdef USE_DS1624
/*********************************************************************************************\
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* DS1624, DS1621 - Temperature
*
* I2C Address: 0x48 - 0x4F
\*********************************************************************************************/
#define XSNS_59 59
#define XI2C_42 42 // See I2CDEVICES.md
#define DS1624_MEM_REGISTER 0x17 //only for ds1624, don't exists on 1621
#define DS1624_CONF_REGISTER 0xAC
#define DS1624_TEMP_REGISTER 0xAA
#define DS1624_START_REGISTER 0xEE
#define DS1624_STOP_REGISTER 0x22
#define DS1621_COUNTER_REGISTER 0xA8 //exists on 1621 and 1624(undocumented)
#define DS1621_SLOPE_REGISTER 0xA9 //exists on 1624 and 1624(undocumented)
#define DS1621_CFG_1SHOT (1<<0)
#define DS1621_CFG_DONE (1<<7)
enum {
DS1624_TYPE_DS1624,
DS1624_TYPE_DS1621
};
#define DS1624_MAX_SENSORS 8
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bool ds1624_init = false;
struct {
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float value;
uint8_t type;
int errcnt;
int misscnt;
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bool valid;
char name[9];
} ds1624_sns[DS1624_MAX_SENSORS];
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uint32_t DS1624_Idx2Addr(uint32_t idx) {
return 0x48 + idx;
}
int DS1624_Restart(uint8_t config, uint32_t idx) {
uint32_t addr = DS1624_Idx2Addr(idx);
if ((config & 1) == 1) {
config &= ~(DS1621_CFG_DONE|DS1621_CFG_1SHOT);
I2cWrite8(addr, DS1624_CONF_REGISTER, config); // 1shot off
delay(10); // by spec after writing
AddLog_P2(LOG_LEVEL_ERROR, "%s addr %x is reset, reconfig: %x", ds1624_sns[idx].name, addr, config);
}
I2cValidRead(addr, DS1624_START_REGISTER, 1);
}
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void DS1624_HotPlugUp(uint32_t idx)
{
uint32_t addr = DS1624_Idx2Addr(idx);
if (I2cActive(addr)) { return; }
if (!I2cSetDevice(addr)) { return; }
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uint8_t config;
if (I2cValidRead8(&config, addr, DS1624_CONF_REGISTER)) {
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uint8_t tmp;
ds1624_sns[idx].type = (I2cValidRead8(&tmp, addr, DS1624_MEM_REGISTER)) ? DS1624_TYPE_DS1624 : DS1624_TYPE_DS1621;
snprintf_P(ds1624_sns[idx].name, sizeof(ds1624_sns[idx].name), PSTR("DS162%c%c%d"),
(ds1624_sns[idx].type == DS1624_TYPE_DS1621) ? '1' : '4', IndexSeparator(), idx);
I2cSetActiveFound(addr, ds1624_sns[idx].name);
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ds1624_sns[idx].valid = true;
ds1624_sns[idx].errcnt = 0;
ds1624_sns[idx].misscnt = 0;
DS1624_Restart(config,idx);
AddLog_P2(LOG_LEVEL_INFO, "Hot Plug %s addr %x config: %x", ds1624_sns[idx].name, addr, config);
}
}
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void DS1624_HotPlugDown(int idx)
{
uint32_t addr = DS1624_Idx2Addr(idx);
if (!I2cActive(addr)) { return; }
I2cResetActive(addr);
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ds1624_sns[idx].valid = false;
AddLog_P2(LOG_LEVEL_INFO, "Hot UnPlug %s", ds1624_sns[idx].name);
}
bool DS1624GetTemp(float *value, int idx)
{
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uint32_t addr = DS1624_Idx2Addr(idx);
uint8_t config;
if (!I2cValidRead8(&config, addr, DS1624_CONF_REGISTER)) {
ds1624_sns[idx].misscnt++;
AddLog_P2(LOG_LEVEL_INFO, "%s device missing (errors: %i)", ds1624_sns[idx].name, ds1624_sns[idx].misscnt);
return false;
}
ds1624_sns[idx].misscnt=0;
if (config & (DS1621_CFG_1SHOT|DS1621_CFG_DONE)) {
ds1624_sns[idx].errcnt++;
AddLog_P2(LOG_LEVEL_INFO, "%s config error, restart... (errors: %i)", ds1624_sns[idx].name, ds1624_sns[idx].errcnt);
DS1624_Restart(config, idx);
return false;
}
uint16_t t;
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if (!I2cValidRead16(&t, DS1624_Idx2Addr(idx), DS1624_TEMP_REGISTER)) { return false; }
if (ds1624_sns[idx].type == DS1624_TYPE_DS1624) {
*value = ((float)(int8_t)(t>>8)) + ((t>>4)&0xf)*0.0625;
} else { //type == DS1624_TYPE_DS1621
// Datasheet for ds1621 is wrong for high resolution, real is:
*value = ((float)(int8_t)(t>>8));
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uint8_t remain;
if (!I2cValidRead8(&remain, addr, DS1621_COUNTER_REGISTER)) { return true; }
uint8_t perc;
if (!I2cValidRead8(&perc, addr, DS1621_SLOPE_REGISTER)) { return true; }
float fix=(float)(perc - remain)/(float)perc;
*value+=fix;
}
ds1624_sns[idx].errcnt=0;
config &= ~(DS1621_CFG_DONE);
I2cWrite8(addr, DS1624_CONF_REGISTER, config);
return true;
}
void DS1624HotPlugScan(void)
{
uint16_t t;
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for (uint32_t idx = 0; idx < DS1624_MAX_SENSORS; idx++) {
uint32_t addr = DS1624_Idx2Addr(idx);
if (I2cActive(addr) && !ds1624_sns[idx].valid) {
continue; // is busy by another driver
}
if (ds1624_sns[idx].valid) {
if ((ds1624_sns[idx].misscnt>2)||(ds1624_sns[idx].errcnt>2)) {
DS1624_HotPlugDown(idx);
continue;
}
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}
DS1624_HotPlugUp(idx);
}
}
void DS1624EverySecond(void)
{
float t;
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for (uint32_t i = 0; i < DS1624_MAX_SENSORS; i++) {
if (!ds1624_sns[i].valid) { continue; }
if (!DS1624GetTemp(&t, i)) { continue; }
ds1624_sns[i].value = ConvertTemp(t);
}
}
void DS1624Show(bool json)
{
char temperature[33];
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bool once = true;
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for (uint32_t i = 0; i < DS1624_MAX_SENSORS; i++) {
if (!ds1624_sns[i].valid) { continue; }
dtostrfd(ds1624_sns[i].value, Settings.flag2.temperature_resolution, temperature);
if (json) {
ResponseAppend_P(PSTR(",\"%s\":{\"" D_JSON_TEMPERATURE "\":%s}"), ds1624_sns[i].name, temperature);
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if ((0 == tele_period) && once) {
#ifdef USE_DOMOTICZ
DomoticzSensor(DZ_TEMP, temperature);
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#endif // USE_DOMOTICZ
#ifdef USE_KNX
KnxSensor(KNX_TEMPERATURE, temperature);
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#endif // USE_KNX
once = false;
}
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#ifdef USE_WEBSERVER
} else {
WSContentSend_PD(HTTP_SNS_TEMP, ds1624_sns[i].name, temperature, TempUnit());
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#endif // USE_WEBSERVER
}
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xsns59(uint8_t function)
{
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if (!I2cEnabled(XI2C_42)) { return false; }
bool result = false;
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if (FUNC_INIT == function) {
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if (!ds1624_init) {
memset(ds1624_sns, 0, sizeof(ds1624_sns));
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ds1624_init = true;
DS1624HotPlugScan(); // If HotPlug is off
}
}
switch (function) {
case FUNC_HOTPLUG_SCAN:
DS1624HotPlugScan();
break;
case FUNC_EVERY_SECOND:
DS1624EverySecond();
break;
case FUNC_JSON_APPEND:
DS1624Show(1);
break;
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#ifdef USE_WEBSERVER
case FUNC_WEB_SENSOR:
DS1624Show(0);
break;
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#endif // USE_WEBSERVER
}
return result;
}
#endif // USE_DS1624
#endif // USE_I2C