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109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
#ifndef STA_SENSORS_MS5607_HPP
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#define STA_SENSORS_MS5607_HPP
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#include<sta/spi/device.hpp>
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#include<sta/endian.hpp>
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#include<sta/stm32/delay.hpp>
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namespace sta {
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// Class to represent a MS5607 pressure sensor which is used with SPI
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class MS5607 {
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public:
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// Different OSR levels for the sensor
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enum OsrLevel {
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_256 = 0,
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_512 = 1,
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_1024 = 2,
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_2048 = 3,
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_4096 = 4
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};
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MS5607(SpiDevice* device, OsrLevel osr=OsrLevel::_1024);
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// Request Calculation of uncompensated pressure
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// Takes a few ms -> Call, then do sth. else, then get Pressure with function
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// If calculation already running, do nothing
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void requestAdcReadout(uint32_t curTime);
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// Function to get Pressure
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// Parameter should be Temperature in Celsius * 100 (e.g. 20.3 deg. C -> 2030)
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// If currently still processing, use old value
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// If currently not processing, start processing to minmize potential wating times
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int32_t getPressure(int32_t temp, uint32_t curTime);
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// Parameterless version of function above
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// Calls getTemperature, to get temp
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// NOT RECOMMENDED
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int32_t getPressure();
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// Getter for temperature
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// Deprecated because of time constrains
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// NOT RECOMMENDED
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int32_t getTemperature();
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void changeOsrLevel(OsrLevel newOsr) {
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// Don't I need to write this to the sensor?
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this->osr_ = newOsr;
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}
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private:
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// Helper method to keep code clean
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void pulseCS(uint32_t ms=1) {
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this->device_->endTransmission();
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sta::delayMs(ms);
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this->device_->beginTransmission();
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}
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// Last Presure Value meassured; Used to give any output if still calculating ADC
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int32_t lastPresVal;
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// Value to store, when adc was started
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// On STM32 with HAL_GetTick() (Gives ms since startup)
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uint32_t adcStartTime;
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// STA internal object for SPi abstraction
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SpiDevice* device_;
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OsrLevel osr_;
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// 6 Different constants; Includes Offsets, references etc.
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uint16_t sens, off, tcs, tco, t_ref, tempsens;
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// All possible commands to send to the sensor
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enum Operations {
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RESET = 0x1E,
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READ_PROM = 0xA2,
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D1_CONVERSION = 0x40,
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D2_CONVERSION = 0x50,
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ADC_RESULT = 0x00
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};
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// Request pure ADC converted values from the sensor
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// Calculations with offset required
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uint32_t readPressure();
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// Read temp should not be used, rather give temp from e.g. SCA3300 as parameter to readPres
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uint32_t readTemp();
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// Calculate pure ADC values to final pressure/temperature values
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int32_t calculatePressure(uint32_t d1, int32_t dT);
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int32_t calculateTemperature(uint32_t d2);
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void reset();
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void readPROM();
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// Constants for waiting
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const char RESET_DELAY = 2800; // in uS
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// Function to get the delay times needed for different OSR Levels
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// Values not found in datasheet (facepalm)
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// Thus partly googled, partly tested out
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static uint8_t delayTimes(OsrLevel level) {
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switch (level) {
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case _256:
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return
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}
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}
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};
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}
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#endif // ifndef STA_SENSORS_MS5607_HPP
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