eive-obsw/mission/devices/max1227.cpp
Jakob Meier 17d17dce06
Some checks failed
EIVE/eive-obsw/pipeline/head There was a failure building this commit
bugfix for some negative temperature conversions
2022-06-10 10:39:43 +02:00

32 lines
947 B
C++

#include "max1227.h"
#include <cstring>
void max1227::prepareExternallyClockedSingleChannelRead(uint8_t *spiBuf, uint8_t channel,
size_t &sz) {
spiBuf[0] = buildConvByte(ScanModes::N_ONCE, channel, false);
spiBuf[1] = 0x00;
spiBuf[2] = 0x00;
sz = 3;
}
void max1227::prepareExternallyClockedRead0ToN(uint8_t *spiBuf, uint8_t n, size_t &sz) {
for (uint8_t idx = 0; idx <= n; idx++) {
spiBuf[idx * 2] = buildConvByte(ScanModes::N_ONCE, idx, false);
spiBuf[idx * 2 + 1] = 0x00;
}
spiBuf[(n + 1) * 2] = 0x00;
sz += (n + 1) * 2 + 1;
}
void max1227::prepareExternallyClockedTemperatureRead(uint8_t *spiBuf, size_t &sz) {
spiBuf[0] = buildConvByte(ScanModes::N_ONCE, 0, true);
std::memset(spiBuf + 1, 0, 24);
sz += 25;
}
float max1227::getTemperature(uint16_t raw) {
float temp = static_cast<float>((-2048 * (raw >> 11)) + (raw & 0x7FF)) * 0.125;
return temp;
}