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TBS Crossfire SerialRX protocol and telemetry (grafting from Betaflight)

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Inject link quality to virtual channel 17 for CRSF telemetry, change to integer arithmetic for channel value conversion
Rename USE_PWM and USE_PPM to USE_RX_PWM and USE_RX_PPM
This commit is contained in:
Konstantin Sharlaimov (DigitalEntity) 2017-01-10 17:55:54 +10:00
parent a966135eb5
commit 4f250b96c4
22 changed files with 849 additions and 130 deletions
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13
src/main/common/maths.c
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@ -459,6 +459,19 @@ uint16_t crc16_ccitt(uint16_t crc, unsigned char a)
return crc;
}
uint8_t crc8_dvb_s2(uint8_t crc, unsigned char a)
{
crc ^= a;
for (int ii = 0; ii < 8; ++ii) {
if (crc & 0x80) {
crc = (crc << 1) ^ 0xD5;
} else {
crc = crc << 1;
}
}
return crc;
}
float bellCurve(const float x, const float curveWidth)
{
return powf(M_Ef, -sq(x) / (2.0f * sq(curveWidth)));