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Code Issues Wiki Activity

Improved mixTable calculation efficiency

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This commit is contained in:
Martin Budden 2017-08-17 07:54:08 +01:00
parent e058fe697c
commit e4975d735d
1 changed files with 18 additions and 15 deletions
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33
src/main/flight/mixer.c
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@ -543,7 +543,8 @@ void calculateThrottleAndCurrentMotorEndpoints(void)
motorOutputRange = motorOutputMax - motorOutputMin;
}
void applyMixToMotors(float motorMix[MAX_SUPPORTED_MOTORS]) {
static void applyMixToMotors(float motorMix[MAX_SUPPORTED_MOTORS])
{
// Now add in the desired throttle, but keep in a range that doesn't clip adjusted
// roll/pitch/yaw. This could move throttle down, but also up for those low throttle flips.
for (uint32_t i = 0; i < motorCount; i++) {
@ -586,33 +587,35 @@ void mixTable(uint8_t vbatPidCompensation)
// Find min and max throttle based on conditions. Throttle has to be known before mixing
calculateThrottleAndCurrentMotorEndpoints();
float motorMix[MAX_SUPPORTED_MOTORS];
// Calculate and Limit the PIDsum
const float scaledAxisPidRoll =
float scaledAxisPidRoll =
constrainf((axisPID_P[FD_ROLL] + axisPID_I[FD_ROLL] + axisPID_D[FD_ROLL]) / PID_MIXER_SCALING, -pidSumLimit, pidSumLimit);
const float scaledAxisPidPitch =
float scaledAxisPidPitch =
constrainf((axisPID_P[FD_PITCH] + axisPID_I[FD_PITCH] + axisPID_D[FD_PITCH]) / PID_MIXER_SCALING, -pidSumLimit, pidSumLimit);
const float scaledAxisPidYaw =
float scaledAxisPidYaw =
constrainf((axisPID_P[FD_YAW] + axisPID_I[FD_YAW]) / PID_MIXER_SCALING, -pidSumLimitYaw, pidSumLimitYaw);
if (isMotorsReversed()) {
scaledAxisPidRoll = -scaledAxisPidRoll;
scaledAxisPidPitch = -scaledAxisPidPitch;
scaledAxisPidYaw = -scaledAxisPidYaw;
}
if (mixerConfig()->yaw_motors_reversed) {
scaledAxisPidYaw = -scaledAxisPidYaw;
}
// Calculate voltage compensation
const float vbatCompensationFactor = (vbatPidCompensation) ? calculateVbatPidCompensation() : 1.0f;
// Find roll/pitch/yaw desired output
float motorMix[MAX_SUPPORTED_MOTORS];
float motorMixMax = 0, motorMixMin = 0;
const int yawDirection = GET_DIRECTION(mixerConfig()->yaw_motors_reversed);
int motorDirection = GET_DIRECTION(isMotorsReversed());
for (int i = 0; i < motorCount; i++) {
float mix =
scaledAxisPidRoll * currentMixer[i].roll * (motorDirection) +
scaledAxisPidPitch * currentMixer[i].pitch * (motorDirection) +
scaledAxisPidYaw * currentMixer[i].yaw * (-yawDirection) * (motorDirection);
scaledAxisPidRoll * currentMixer[i].roll +
scaledAxisPidPitch * currentMixer[i].pitch +
scaledAxisPidYaw * currentMixer[i].yaw;
if (vbatCompensationFactor > 1.0f) {
mix *= vbatCompensationFactor; // Add voltage compensation
}
mix *= vbatCompensationFactor; // Add voltage compensation
if (mix > motorMixMax) {
motorMixMax = mix;