//
//
//
#include "driver_SFM3000.h"
bool SensorSFM3000::Init(t_i2cdevices device, void* hw_handle)
{
DriverContext* dc;
dc = (DriverContext*)hw_handle;
hwi = (HW*)dc->hwi;<--- C-style pointer casting [+]C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
dbg = (DebugIfaceClass*)dc->dbg;<--- C-style pointer casting [+]C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
i2c_device = device;
uint8_t wBuffer[6];
wBuffer[0] = 0x10;
wBuffer[1] = 0x00;
hwi->I2CWrite(i2c_device, wBuffer, 2, true);
return hwi->I2CWrite(i2c_device, wBuffer, 2, true);
}
bool SensorSFM3000::doMeasure(float* Flow, float* T)
{
uint32_t result = 0;
bool bres = MeasureFluxRaw(&result);
if (!bres) return false;
int offset = 32000; // Offset for the sensor
float scale = 140.0; // Scale factor for Air and N2 is 140.0, O2 is 142.8
float _flow = ((float)result - offset) / scale;
*Flow = _flow;
*T = 24.0;
Integral += _flow;
return true;
}
float SensorSFM3000::GetIntegral()
{
return Integral;
}
void SensorSFM3000::ResetIntegral()
{
Integral = 0;
}
uint8_t SensorSFM3000::crc8(const uint8_t data, uint8_t crc)<--- The function 'crc8' is never used.
{
crc ^= data;
for (uint8_t i = 8; i; --i) {
crc = (crc & 0x80)
? (crc << 1) ^ 0x31
: (crc << 1);
}
return crc;
}
bool SensorSFM3000::MeasureFluxRaw(uint32_t *raw)
{
uint8_t rBuffer[6];
bool bres = hwi->I2CRead(i2c_device, rBuffer, 3, true);
if (!bres) return false;
uint16_t a = rBuffer[0]; // first received byte stored here. The variable "uint16_t" can hold 2 bytes, this will be relevant later
uint8_t b = rBuffer[1]; // second received byte stored here
uint8_t crc = rBuffer[2]; // crc value stored here<--- Variable 'crc' is assigned a value that is never used.
uint8_t mycrc = 0xFF; // initialize crc variable<--- Variable 'mycrc' is assigned a value that is never used.
a = (a << 8) | b; // combine the two received bytes to a 16bit integer value
uint32_t Flow = a;
*raw = Flow;
return true;
}