From 579035851f95a33129c96be1c6818a5f40067663 Mon Sep 17 00:00:00 2001
From: Francois <thiebolt@irit.fr>
Date: Thu, 10 Mar 2022 00:39:40 +0100
Subject: [PATCH] update
---
.../libraries/neocampus_drivers/SCD4x.cpp | 50 +++++-----
neosensor/libraries/neocampus_drivers/SCD4x.h | 98 ++++++-------------
2 files changed, 56 insertions(+), 92 deletions(-)
diff --git a/neosensor/libraries/neocampus_drivers/SCD4x.cpp b/neosensor/libraries/neocampus_drivers/SCD4x.cpp
index 75789847..28cd8fb9 100644
--- a/neosensor/libraries/neocampus_drivers/SCD4x.cpp
+++ b/neosensor/libraries/neocampus_drivers/SCD4x.cpp
@@ -42,22 +42,18 @@
const uint8_t SCD4x::i2c_addrs[] = { 0x69 };
-#if 0
-TO BE CONTINUED
-
-
/**************************************************************************/
/*!
@brief Test if device at 'adr' is really what we think of
*/
/**************************************************************************/
-boolean SHT3x::is_device( uint8_t a ) {
+boolean SCD4x::is_device( uint8_t a ) {
// First step, parse all addresses
boolean found = false;
- for( uint8_t i=0; i < sizeof(SHT3x::i2c_addrs); i++ ) {
- if( SHT3x::i2c_addrs[i] == a) {
+ for( uint8_t i=0; i < sizeof(SCD4x::i2c_addrs); i++ ) {
+ if( SCD4x::i2c_addrs[i] == a) {
found = true;
break;
}
@@ -77,21 +73,22 @@ boolean SHT3x::is_device( uint8_t a ) {
@brief Instantiates a new class
*/
/**************************************************************************/
-SHT3x::SHT3x( sht3xMeasureType_t kindness ) : generic_driver() {
+SCD4x::SCD4x( scd4xMeasureType_t kindness ) : generic_driver() {
_i2caddr = -1;
_measureType = kindness;
- _resolution = SHT3X_DEFL_RESOLUTION;
}
/* declare kind of units */
-const char *SHT3x::_t_units = "celsius";
-const char *SHT3x::_rh_units = "%r.H.";
+const char *SCD4x::units_co2 = "ppm";
+const char *SCD4x::units_temp = "celsius";
+const char *SCD4x::units_rh = "%r.H.";
/* declare others static vars */
-unsigned long SHT3x::_lastMsRead = 0;
-uint16_t SHT3x::_t_sensor = (uint16_t)(-1);
-uint16_t SHT3x::_rh_sensor = (uint16_t)(-1);
+unsigned long SCD4x::_lastMsRead = 0;
+uint16_t SCD4x::_co2_sensor = (uint16_t)(-1);
+uint16_t SCD4x::_t_sensor = (uint16_t)(-1);
+uint16_t SCD4x::_rh_sensor = (uint16_t)(-1);
/**************************************************************************/
@@ -99,17 +96,20 @@ uint16_t SHT3x::_rh_sensor = (uint16_t)(-1);
@brief send back units
*/
/**************************************************************************/
-const char * SHT3x::sensorUnits( uint8_t idx ) {
+const char * SCD4x::sensorUnits( uint8_t idx ) {
switch( _measureType ) {
- case sht3xMeasureType_t::temperature:
- return _t_units;
+ case scd4xMeasureType_t::co2:
+ return units_co2;
break;
- case sht3xMeasureType_t::humidity:
- return _rh_units;
+ case scd4xMeasureType_t::temperature:
+ return units_temp;
+ break;
+ case scd4xMeasureType_t::humidity:
+ return units_rh;
break;
default:
- log_error(F("\n[SHT3x] unknown kind of measureType ?!?")); log_flush();
+ log_error(F("\n[SCD4x] unknown kind of measureType ?!?")); log_flush();
return nullptr;
}
}
@@ -120,7 +120,7 @@ const char * SHT3x::sensorUnits( uint8_t idx ) {
@brief Setups the HW
*/
/**************************************************************************/
-boolean SHT3x::begin( uint8_t addr=-1) {
+boolean SCD4x::begin( uint8_t addr=-1) {
// get i2caddr
if( (addr < (uint8_t)(I2C_ADDR_START)) or (addr > (uint8_t)(I2C_ADDR_STOP)) ) return false;
_i2caddr = addr;
@@ -134,7 +134,6 @@ boolean SHT3x::begin( uint8_t addr=-1) {
*/
// define defaults parameters
- setResolution( _resolution );
/* start lastmsg time measurement.
* This way, we get sure to have at least a first acquisition! */
@@ -147,16 +146,17 @@ boolean SHT3x::begin( uint8_t addr=-1) {
/*
* Power modes: ON or powerOFF
*/
-void SHT3x::powerOFF( void )
+void SCD4x::powerOFF( void )
{
// device does not feature continuous integration so nothing to start or stop
}
-void SHT3x::powerON( void )
+void SCD4x::powerON( void )
{
// device does not feature continuous integration so nothing to start or stop
}
+TO BE CONTINUED
/**************************************************************************/
/*!
@@ -505,5 +505,3 @@ bool SHT3x::_check_identity( uint8_t a ) {
return true;
}
-
-#endif /* 0 */
diff --git a/neosensor/libraries/neocampus_drivers/SCD4x.h b/neosensor/libraries/neocampus_drivers/SCD4x.h
index b8fe40fa..ca37674a 100644
--- a/neosensor/libraries/neocampus_drivers/SCD4x.h
+++ b/neosensor/libraries/neocampus_drivers/SCD4x.h
@@ -50,7 +50,7 @@
* - CO2, temp and humidity are measured and sent in a single 9bytes frame
* 16bits C02 + CRC + 16bits T + CRC + 16bits RH + CRC
* - every 16bits frames are CRC protected
- * - CRC8 0x31, initial=0xFF for 16bits data (first is )
+ * - CRC8 0x31, initial=0xFF, final xor=0x00 for 16bits data (first is )
*/
enum class sht3xCmd_t : uint16_t {
@@ -74,73 +74,37 @@ enum class sht3xCmd_t : uint16_t {
// low-power operations
start_low_power_periodoc_measurement = 0x21ac, // 30s measurement delay
get_data_ready_status = 0xe4b8, // execution time: 1ms
-
-TO BE CONTINUED
-
-//Advanced features
-#define SCD4x_COMMAND_PERSIST_SETTINGS 0x3615 // execution time: 800ms
-#define SCD4x_COMMAND_GET_SERIAL_NUMBER 0x3682 // execution time: 1ms
-#define SCD4x_COMMAND_PERFORM_SELF_TEST 0x3639 // execution time: 10000ms
-#define SCD4x_COMMAND_PERFORM_FACTORY_RESET 0x3632 // execution time: 1200ms
-#define SCD4x_COMMAND_REINIT 0x3646 // execution time: 20ms
-
-//Low power single shot - SCD41 only
-#define SCD4x_COMMAND_MEASURE_SINGLE_SHOT 0x219d // execution time: 5000ms
-#define SCD4x_COMMAND_MEASURE_SINGLE_SHOT_RHT_ONLY 0x2196 // execution time: 50ms
-
-
-
- soft_reset = 0X30A2, // software reset
- heater_enable = 0x306D, // on-chip heater enable
- heater_disable = 0x3066, // on-chip heater disable
- get_status = 0xF32D, // read Status Register
- clear_status = 0x3041, // clear Status Register
- meas_highRes_stretch = 0x2C06, // Measurement High Repeatability (resolution) with Clock Stretch Enabled
- meas_medRes_stretch = 0x2C0D, // Measurement Medium Repeatability (resolution) with Clock Stretch Enabled
- meas_lowRes_stretch = 0x2C10, // Measurement Low Repeatability (resolution) with Clock Stretch Enabled
- meas_highRes = 0x2400, // Measurement High Repeatability (resolution) WITHOUT clock stretching
- meas_medRes = 0x240B, // Measurement Medium Repeatability (resolution) WITHOUT clock stretching
- meas_lowRes = 0x2416, // Measurement Low Repeatability (resolution) WITHOUT clock stretching
+ // stop_periodic_measurement to stop low_power periodic measurement
+
+ // advanced features
+ persist_settings = 0x3615, // execution time: 800ms
+ get_serial_number = 0x3682, // execution time: 1ms
+ perform_self_test = 0x3639, // execution time: 10000ms
+ perform_factory_reset = 0x3632, // execution time: 1200ms
+ reinit = 0x3646, // execution time: 20ms
+
+ // low-power single shot - SCD41 only
+ measure_single_shot = 0x219d, // execution time: 5000ms
+ measure_single_shot_rht_only = 0x2196, // execution time: 50ms
};
-// status
-#define SHT3X_STATUS_REG_MASK 0xFC1F // removed bit 9:5 because of their unspecified value
-#define SHT3X_STATUS_REG_DEFL 0x8010 // expected default value (apply MASK for value checking)
-
// type of measure
-enum class sht3xMeasureType_t : uint8_t {
+enum class scd4xMeasureType_t : uint8_t {
+ co2 = 0x00,
humidity = 0x10,
temperature = 0x20
};
-// resolution
-enum class sht3xResolution_t : uint8_t {
- high_res,
- medium_res,
- low_res
-};
-#define SHT3X_DEFL_RESOLUTION sht3xResolution_t::high_res
-
-// integration time (ms)
-enum class sht3xIntegration_t : uint8_t {
- ms_integrate_high = 16, // integraion time (ms) for high resolution measure
- ms_integrate_medium = 7, // integraion time (ms) for medium resolution measure
- ms_integrate_low = 5 // integraion time (ms) for low resolution measure
-};
-
-#define SHT3X_INTEGRATION_TIME_CTE 5 // additionnal ms delay to all timings (total <= 255 ---uint8_t)
-
/*
* Class
*/
-class SHT3x : public generic_driver {
+class SCD4x : public generic_driver {
public:
- SHT3x( sht3xMeasureType_t );
+ SCD4x( scd4xMeasureType_t );
- boolean begin( uint8_t ); // start with an i2c address
- bool setResolution( sht3xResolution_t );
+ boolean begin( uint8_t ); // start with an i2c address
void powerON( void ); // switch ON
void powerOFF( void ); // switch OFF
@@ -150,17 +114,18 @@ class SHT3x : public generic_driver {
String subID( uint8_t=0 ) { return String(_i2caddr); };
// read sensor's values
+ boolean getCO2( float* ); // retroieve co2
boolean getRH( float* ); // retrieve humidity
boolean getTemp( float* ); // retrieve temperature
// --- static methods / constants -----------------------
-
+
// list of possibles I2C addrs
static const uint8_t i2c_addrs[];
// device detection
static boolean is_device( uint8_t );
-
+
private:
// -- private methods
bool _readSensor( uint16_t* ); // low-level function to read value registers
@@ -171,22 +136,23 @@ class SHT3x : public generic_driver {
// --- private attributes
uint8_t _i2caddr;
- sht3xResolution_t _resolution;
- sht3xMeasureType_t _measureType;
- static const char *_t_units;
- static const char *_rh_units;
- uint8_t _integrationTime; // ms time to integrate a measure (for non continuous mode)
- /* both TEMP and RH are read at the same time ==> hence we store them
+ scd4xMeasureType_t _measureType;
+ static const char *units_co2;
+ static const char *units_temp;
+ static const char *units_rh;
+ uint16_t _integrationTime; // ms time to integrate a measure
+ /* CO2, TEMP and RH are read at the same time ==> hence we store them
as shared attributes across all instances */
static unsigned long _lastMsRead; // last time data have been read (elapsed ms from beginning)
- static uint16_t _t_sensor; // shared across all instances (for both humidity and temperature modules)
- static uint16_t _rh_sensor; // shared across all instances (for both humidity and temperature modules)
+ static uint16_t _co2_sensor; // shared across all instances
+ static uint16_t _t_sensor; // shared across all instances
+ static uint16_t _rh_sensor; // shared across all instances
// CRC computation
static const uint8_t _crc8_polynom; // crc P(x)=x^8+x^5+x^4+1 (0x31) 1.00110001, init=0xFF
-#ifdef SHT3X_CRC_LOOKUP_TABLE
+#ifdef SCD4X_CRC_LOOKUP_TABLE
static const uint8_t _crc8_table[256];
-#endif /* SHT3X_CRC_LOOKUP_TABLE */
+#endif /* SCD4X_CRC_LOOKUP_TABLE */
};
#endif /* _SCD4X_H_ */
--
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