Rev 1796 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 1775 | - | 1 | #include <inttypes.h> |
| 2 | #include "attitude.h" |
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| 3 | #include "uart0.h" |
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| 4 | #include "configuration.h" |
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| 5 | #include "controlMixer.h" |
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| 6 | |||
| 7 | // for digital / LED debug. |
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| 8 | #include "output.h" |
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| 9 | |||
| 10 | // For scope debugging only! |
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| 11 | #include "rc.h" |
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| 12 | |||
| 13 | #define INTEGRAL_LIMIT 100000 |
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| 14 | |||
| 15 | /* |
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| 16 | #define DEBUGINTEGRAL 0 |
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| 17 | #define DEBUGDIFFERENTIAL 0 |
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| 18 | #define DEBUGHOVERTHROTTLE 0 |
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| 19 | #define DEBUGHEIGHTSWITCH 0 |
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| 20 | */ |
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| 21 | |||
| 22 | #define LATCH_TIME 40 |
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| 23 | |||
| 24 | int32_t groundPressure; |
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| 25 | |||
| 26 | int32_t targetHeight; |
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| 27 | int32_t rampedTargetHeight; |
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| 28 | |||
| 29 | #define DEFAULT_HOVERTHROTTLE 50 |
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| 30 | int32_t stronglyFilteredHeightDiff = 0; |
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| 31 | uint16_t hoverThrottle = 0; // DEFAULT_HOVERTHROTTLE; |
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| 32 | uint16_t stronglyFilteredThrottle = DEFAULT_HOVERTHROTTLE; |
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| 33 | #define HOVERTHROTTLEFILTER 25 |
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| 34 | |||
| 35 | uint8_t heightRampingTimer = 0; |
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| 36 | int32_t maxHeight; |
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| 37 | int32_t iHeight; |
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| 38 | /* |
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| 39 | These parameters are free to take: |
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| 40 | uint8_t HeightMinGas; // Value : 0-100 |
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| 41 | uint8_t HeightD; // Value : 0-250 |
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| 42 | uint8_t MaxHeight; // Value : 0-32 |
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| 43 | uint8_t HeightP; // Value : 0-32 |
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| 44 | uint8_t Height_Gain; // Value : 0-50 |
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| 45 | uint8_t Height_ACC_Effect; // Value : 0-250 |
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| 46 | |||
| 47 | */ |
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| 48 | |||
| 49 | int32_t getHeight(void) { |
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| 50 | return groundPressure - filteredAirPressure; |
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| 51 | } |
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| 52 | |||
| 53 | void HC_setGround(void) { |
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| 54 | groundPressure = filteredAirPressure; |
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| 55 | // This should also happen when height control is enabled in-flight. |
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| 56 | rampedTargetHeight = getHeight(); |
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| 57 | maxHeight = 0; |
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| 58 | iHeight = 0; |
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| 59 | } |
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| 60 | |||
| 61 | void HC_update(void) { |
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| 62 | int32_t height = getHeight(); |
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| 63 | static uint8_t setHeightLatch = 0; |
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| 64 | |||
| 65 | if (height > maxHeight) |
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| 66 | maxHeight = height; |
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| 67 | |||
| 68 | if (staticParams.GlobalConfig & CFG_HEIGHT_SWITCH) { |
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| 69 | // If switch is activated in config |
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| 70 | DebugOut.Digital[0] |= DEBUG_HEIGHT_SWITCH; |
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| 71 | if (dynamicParams.MaxHeight < 40 || dynamicParams.MaxHeight > 255-40) { |
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| 72 | // Switch is ON |
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| 73 | if (setHeightLatch <= LATCH_TIME) { |
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| 74 | if (setHeightLatch == LATCH_TIME) { |
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| 75 | // Freeze the height as target. We want to do this exactly once each time the switch is thrown ON. |
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| 76 | targetHeight = height; |
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| 77 | DebugOut.Digital[1] |= DEBUG_HEIGHT_SWITCH; |
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| 78 | } |
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| 79 | // Time not yet reached. |
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| 80 | setHeightLatch++; |
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| 81 | } |
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| 82 | } else { |
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| 83 | // Switch is OFF. |
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| 84 | setHeightLatch = 0; |
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| 85 | DebugOut.Digital[1] &= ~DEBUG_HEIGHT_SWITCH; |
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| 86 | } |
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| 87 | } else { |
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| 88 | // Switch is not activated; take the "max-height" as the target height. |
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| 89 | DebugOut.Digital[0] &= ~DEBUG_HEIGHT_SWITCH; |
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| 90 | targetHeight = (uint16_t)dynamicParams.MaxHeight * 100; //getHeight() + 10 * 100; |
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| 91 | } |
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| 92 | |||
| 93 | if (++heightRampingTimer == INTEGRATION_FREQUENCY/10) { |
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| 94 | heightRampingTimer = 0; |
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| 95 | if (rampedTargetHeight + staticParams.Height_Gain <= targetHeight) { |
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| 96 | rampedTargetHeight += staticParams.Height_Gain; |
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| 97 | } else if (rampedTargetHeight - staticParams.Height_Gain >= targetHeight) { |
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| 98 | rampedTargetHeight -= staticParams.Height_Gain; |
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| 99 | } |
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| 100 | } |
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| 101 | |||
| 102 | //DebugOut.Analog[16] = (int16_t)(height / 10); |
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| 103 | //DebugOut.Analog[17] = (int16_t)(rampedTargetHeight / 10); |
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| 104 | } |
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| 105 | |||
| 106 | // ParamSet.GlobalConfig & CFG_HEIGHT_CONTROL |
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| 107 | // ParamSet.GlobalConfig & CFG_HEIGHT_SWITCH |
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| 108 | // ParamSet.BitConfig & CFG_HEIGHT_3SWITCH |
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| 109 | |||
| 110 | // takes 180-200 usec (with integral term). That is too heavy!!! |
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| 111 | // takes 100 usec without integral term. |
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| 112 | uint16_t HC_getThrottle(uint16_t throttle) { |
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| 113 | int32_t height = getHeight(); |
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| 114 | int32_t heightError = rampedTargetHeight - height; |
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| 115 | |||
| 116 | static int32_t lastHeight; |
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| 117 | |||
| 118 | int16_t dHeight = height - lastHeight; |
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| 119 | lastHeight = height; |
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| 120 | |||
| 121 | // DebugOut.Analog[20] = dHeight; |
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| 122 | // DebugOut.Analog[21] = dynamicParams.MaxHeight; |
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| 123 | |||
| 124 | // iHeight, at a difference of 5 meters and a freq. of 488 Hz, will grow with 244000 / sec.... |
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| 125 | // iHeight += heightError; |
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| 126 | |||
| 127 | if (dHeight > 0) { |
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| 128 | DebugOut.Digital[0] |= DEBUG_HEIGHT_DIFF; |
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| 129 | DebugOut.Digital[1] &= ~DEBUG_HEIGHT_DIFF; |
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| 130 | } else if (dHeight < 0) { |
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| 131 | DebugOut.Digital[1] |= DEBUG_HEIGHT_DIFF; |
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| 132 | DebugOut.Digital[0] &= ~DEBUG_HEIGHT_DIFF; |
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| 133 | } |
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| 134 | |||
| 135 | /* |
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| 136 | if (iHeight > INTEGRAL_LIMIT) { iHeight = INTEGRAL_LIMIT; if (DEBUGINTEGRAL) {DebugOut.Digital[0] = 1; DebugOut.Digital[1] = 1;}} |
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| 137 | else if (iHeight < -INTEGRAL_LIMIT) { iHeight = -INTEGRAL_LIMIT; if (DEBUGINTEGRAL) {DebugOut.Digital[0] = 0; DebugOut.Digital[1] = 0; }} |
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| 138 | else if (iHeight > 0) { if (DEBUGINTEGRAL) DebugOut.Digital[0] = 1;} |
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| 139 | else if (iHeight < 0) { if (DEBUGINTEGRAL) DebugOut.Digital[1] = 1;} |
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| 140 | */ |
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| 141 | |||
| 142 | int16_t dThrottle = heightError * staticParams.HeightP / 1000 /*+ iHeight / 10000L * staticParams.Height_ACC_Effect */ - dHeight * staticParams.HeightD; |
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| 143 | |||
| 144 | // the "minGas" is now a limit for how much up / down the throttle can be varied |
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| 145 | if (dThrottle > staticParams.HeightMinGas) dThrottle = staticParams.HeightMinGas; |
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| 146 | else if (dThrottle < -staticParams.HeightMinGas) dThrottle = -staticParams.HeightMinGas; |
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| 147 | |||
| 148 | //DebugOut.Analog[18] = dThrottle; |
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| 149 | //DebugOut.Analog[19] = iHeight / 10000L; |
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| 150 | |||
| 151 | // TODO: Eliminate repitition. |
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| 152 | if (staticParams.GlobalConfig & CFG_HEIGHT_CONTROL) { |
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| 153 | if (!(staticParams.GlobalConfig & CFG_HEIGHT_SWITCH) || (dynamicParams.MaxHeight < 40 || dynamicParams.MaxHeight > 255-40)) { |
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| 154 | // If switch is not in use --> Just apply height control. |
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| 155 | // If switch is in use --> only apply height control when switch is also ON. |
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| 156 | throttle += dThrottle; |
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| 157 | } |
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| 158 | } |
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| 159 | |||
| 160 | /* Experiment: Find hover-throttle */ |
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| 161 | stronglyFilteredHeightDiff = (stronglyFilteredHeightDiff * (HOVERTHROTTLEFILTER - 1) + dHeight) / HOVERTHROTTLEFILTER; |
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| 162 | stronglyFilteredThrottle = (stronglyFilteredThrottle * (HOVERTHROTTLEFILTER - 1) + throttle) / HOVERTHROTTLEFILTER; |
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| 163 | |||
| 164 | if (isFlying >= 1000 && stronglyFilteredHeightDiff < 3 && stronglyFilteredHeightDiff > -3) { |
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| 165 | hoverThrottle = stronglyFilteredThrottle; |
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| 166 | DebugOut.Digital[0] |= DEBUG_HOVERTHROTTLE; |
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| 167 | // DebugOut.Analog[18] = hoverThrottle; |
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| 168 | } else |
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| 169 | DebugOut.Digital[0] &= ~DEBUG_HOVERTHROTTLE; |
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| 170 | return throttle; |
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| 171 | } |
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| 172 | |||
| 173 | /* |
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| 174 | For a variometer thingy: |
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| 175 | When switch is thrown on, freeze throttle (capture it into variable) |
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| 176 | For each iter., add (throttle - frozen throttle) to target height. Maybe don't do ramping. |
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| 177 | Output = frozen throttle + whatever is computed +/-. Integral? |
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| 178 | */ |