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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// + Copyright (c) 04.2007 Holger Buss
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// + Copyright (c) 04.2007 Holger Buss
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// + only for non-profit use
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// + only for non-profit use
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// + www.MikroKopter.com
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// + www.MikroKopter.com
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// + see the File "License.txt" for further Informations
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// + see the File "License.txt" for further Informations
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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#include <stdlib.h>
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#include <stdlib.h>
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#include <avr/io.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/interrupt.h>
10
 
10
 
11
#include "analog.h"
11
#include "analog.h"
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#include "main.h"
12
#include "main.h"
13
#include "timer0.h"
13
#include "timer0.h"
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#include "fc.h"
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#include "fc.h"
15
#include "printf_P.h"
15
#include "printf_P.h"
16
#include "eeprom.h"
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#include "eeprom.h"
17
 
17
 
18
volatile int16_t Current_Nick = 0, Current_Roll = 0, Current_Gier = 0;
18
volatile int16_t Current_Pitch = 0, Current_Roll = 0, Current_Yaw = 0;
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volatile int16_t Current_AccX = 0, Current_AccY = 0, Current_AccZ = 0;
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volatile int16_t Current_AccX = 0, Current_AccY = 0, Current_AccZ = 0;
20
volatile int16_t UBat = 100;
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volatile int16_t UBat = 100;
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volatile int16_t AdValueGyrNick = 0, AdValueGyrRoll = 0, AdValueGyrGier = 0;
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volatile int16_t AdValueGyrPitch = 0, AdValueGyrRoll = 0, AdValueGyrYaw = 0;
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volatile int16_t AdValueAccRoll = 0, AdValueAccNick = 0, AdValueAccTop = 0;
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volatile int16_t AdValueAccRoll = 0, AdValueAccPitch = 0, AdValueAccTop = 0;
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volatile uint8_t messanzahl_AccHoch = 0;
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volatile uint8_t messanzahl_AccHoch = 0;
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volatile int32_t Luftdruck = 32000;
24
volatile int32_t AirPressure = 32000;
25
volatile int16_t StartLuftdruck;
25
volatile int16_t StartAirPressure;
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volatile uint16_t MessLuftdruck = 1023;
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volatile uint16_t ReadingAirPressure = 1023;
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uint8_t DruckOffsetSetting;
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uint8_t DruckOffsetSetting;
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volatile int16_t HoeheD = 0;
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volatile int16_t HoeheD = 0;
29
volatile int16_t tmpLuftdruck;
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volatile int16_t tmpAirPressure;
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volatile uint16_t ZaehlMessungen = 0;
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volatile uint16_t ZaehlMessungen = 0;
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31
 
32
/*****************************************************/
32
/*****************************************************/
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/*     Initialize Analog Digital Converter           */
33
/*     Initialize Analog Digital Converter           */
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/*****************************************************/
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/*****************************************************/
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void ADC_Init(void)
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void ADC_Init(void)
36
{
36
{
37
        uint8_t sreg = SREG;
37
        uint8_t sreg = SREG;
38
        // disable all interrupts before reconfiguration
38
        // disable all interrupts before reconfiguration
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        cli();
39
        cli();
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        //ADC0 ... ADC7 is connected to PortA pin 0 ... 7
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        //ADC0 ... ADC7 is connected to PortA pin 0 ... 7
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        DDRA = 0x00;
41
        DDRA = 0x00;
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        PORTA = 0x00;
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        PORTA = 0x00;
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        // Digital Input Disable Register 0
43
        // Digital Input Disable Register 0
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        // Disable digital input buffer for analog adc_channel pins
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        // Disable digital input buffer for analog adc_channel pins
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        DIDR0 = 0xFF;
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        DIDR0 = 0xFF;
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        // external reference, adjust data to the right
46
        // external reference, adjust data to the right
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    ADMUX &= ~((1 << REFS1)|(1 << REFS0)|(1 << ADLAR));
47
    ADMUX &= ~((1 << REFS1)|(1 << REFS0)|(1 << ADLAR));
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    // set muxer to ADC adc_channel 0 (0 to 7 is a valid choice)
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    // set muxer to ADC adc_channel 0 (0 to 7 is a valid choice)
49
    ADMUX = (ADMUX & 0xE0) | 0x00;
49
    ADMUX = (ADMUX & 0xE0) | 0x00;
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    //Set ADC Control and Status Register A
50
    //Set ADC Control and Status Register A
51
    //Auto Trigger Enable, Prescaler Select Bits to Division Factor 128, i.e. ADC clock = SYSCKL/128 = 156.25 kHz
51
    //Auto Trigger Enable, Prescaler Select Bits to Division Factor 128, i.e. ADC clock = SYSCKL/128 = 156.25 kHz
52
    ADCSRA = (1<<ADATE)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);
52
    ADCSRA = (1<<ADATE)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);
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        //Set ADC Control and Status Register B
53
        //Set ADC Control and Status Register B
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        //Trigger Source to Free Running Mode
54
        //Trigger Source to Free Running Mode
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        ADCSRB &= ~((1 << ADTS2)|(1 << ADTS1)|(1 << ADTS0));
55
        ADCSRB &= ~((1 << ADTS2)|(1 << ADTS1)|(1 << ADTS0));
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        // Enable AD conversion
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        // Enable AD conversion
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        ADC_Enable();
57
        ADC_Enable();
58
    // restore global interrupt flags
58
    // restore global interrupt flags
59
    SREG = sreg;
59
    SREG = sreg;
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}
60
}
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61
 
62
void SucheLuftruckOffset(void)
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void SearchAirPressureOffset(void)
63
{
63
{
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 uint8_t off;
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 uint8_t off;
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 off = GetParamByte(PID_LAST_OFFSET);
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 off = GetParamByte(PID_LAST_OFFSET);
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 if(off > 20) off -= 10;
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 if(off > 20) off -= 10;
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 OCR0A = off;
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 OCR0A = off;
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 Delay_ms_Mess(100);
68
 Delay_ms_Mess(100);
69
 if(MessLuftdruck < 850) off = 0;
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 if(ReadingAirPressure < 850) off = 0;
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 for(; off < 250;off++)
70
 for(; off < 250;off++)
71
  {
71
  {
72
  OCR0A = off;
72
  OCR0A = off;
73
  Delay_ms_Mess(50);
73
  Delay_ms_Mess(50);
74
  printf(".");
74
  printf(".");
75
  if(MessLuftdruck < 900) break;
75
  if(ReadingAirPressure < 900) break;
76
  }
76
  }
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 SetParamByte(PID_LAST_OFFSET, off);
77
 SetParamByte(PID_LAST_OFFSET, off);
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 DruckOffsetSetting = off;
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 DruckOffsetSetting = off;
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 Delay_ms_Mess(300);
79
 Delay_ms_Mess(300);
80
}
80
}
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81
 
82
 
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/*****************************************************/
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/*****************************************************/
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/*     Interrupt Service Routine for ADC             */
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/*     Interrupt Service Routine for ADC             */
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/*****************************************************/
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/*****************************************************/
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ISR(ADC_vect)
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ISR(ADC_vect)
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{
87
{
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    static uint8_t adc_channel = 0, state = 0;
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    static uint8_t adc_channel = 0, state = 0;
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    static uint16_t gier1, roll1, nick1;
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    static uint16_t yaw1, roll1, pitch1;
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    static uint8_t messanzahl_Druck = 0;
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    static uint8_t messanzahl_Druck = 0;
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    // disable further AD conversion
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    // disable further AD conversion
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    ADC_Disable();
92
    ADC_Disable();
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    // state machine
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    // state machine
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    switch(state++)
94
    switch(state++)
95
        {
95
        {
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        case 0:
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        case 0:
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            gier1 = ADC; // get Gyro Gier Voltage 1st sample
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            yaw1 = ADC; // get Gyro Yaw Voltage 1st sample
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            adc_channel = 1; // set next channel to ADC1 = ROLL GYRO
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            adc_channel = 1; // set next channel to ADC1 = ROLL GYRO
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            ZaehlMessungen++; // increment total measurement counter
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            ZaehlMessungen++; // increment total measurement counter
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            break;
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            break;
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        case 1:
101
        case 1:
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            roll1 = ADC; // get Gyro Roll Voltage 1st sample
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            roll1 = ADC; // get Gyro Roll Voltage 1st sample
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            adc_channel = 2; // set next channel to ADC2 = NICK GYRO
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            adc_channel = 2; // set next channel to ADC2 = PITCH GYRO
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            break;
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            break;
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        case 2:
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        case 2:
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            nick1 = ADC; // get Gyro Nick Voltage 1st sample
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            pitch1 = ADC; // get Gyro Pitch Voltage 1st sample
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            adc_channel = 4; // set next channel to ADC4 = UBAT
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            adc_channel = 4; // set next channel to ADC4 = UBAT
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            break;
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            break;
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        case 3:
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        case 3:
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                // get actual UBat (Volts*10) is ADC*30V/1024*10 = ADC/3
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                // get actual UBat (Volts*10) is ADC*30V/1024*10 = ADC/3
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            UBat = (3 * UBat + ADC / 3) / 4; // low pass filter updates UBat only to 1 quater with actual ADC value
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            UBat = (3 * UBat + ADC / 3) / 4; // low pass filter updates UBat only to 1 quater with actual ADC value
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            adc_channel = 6; // set next channel to ADC6 = ACC_Y
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            adc_channel = 6; // set next channel to ADC6 = ACC_Y
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            break;
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            break;
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        case 4:
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        case 4:
115
            Current_AccY = NeutralAccY - ADC; // get acceleration in Y direction
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            Current_AccY = NeutralAccY - ADC; // get acceleration in Y direction
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            AdValueAccRoll = Current_AccY;
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            AdValueAccRoll = Current_AccY;
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            adc_channel = 7; // set next channel to ADC7 = ACC_X
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            adc_channel = 7; // set next channel to ADC7 = ACC_X
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            break;
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            break;
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        case 5:
119
        case 5:
120
            Current_AccX = ADC - NeutralAccX; // get acceleration in X direction
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            Current_AccX = ADC - NeutralAccX; // get acceleration in X direction
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            AdValueAccNick =  Current_AccX;
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            AdValueAccPitch =  Current_AccX;
122
                    adc_channel = 0; // set next channel to ADC7 = GIER GYRO
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                    adc_channel = 0; // set next channel to ADC7 = YAW GYRO
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            break;
123
            break;
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        case 6:
124
        case 6:
125
                // average over two samples to create current ADValueGier
125
                // average over two samples to create current AdValueGyrYaw
126
            if(BoardRelease == 10)  AdValueGyrGier = (ADC + gier1) / 2;
126
            if(BoardRelease == 10)  AdValueGyrYaw = (ADC + yaw1) / 2;
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                        else                                       AdValueGyrGier = ADC + gier1; // gain is 2 times lower on FC 1.1
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                        else                                       AdValueGyrYaw = ADC + yaw1; // gain is 2 times lower on FC 1.1
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            adc_channel = 1; // set next channel to ADC7 = ROLL GYRO
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            adc_channel = 1; // set next channel to ADC7 = ROLL GYRO
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            break;
129
            break;
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        case 7:
130
        case 7:
131
                // average over two samples to create current ADValueRoll
131
                // average over two samples to create current ADValueGyrRoll
132
            if(BoardRelease == 10)  AdValueGyrRoll = (ADC + roll1) / 2;
132
            if(BoardRelease == 10)  AdValueGyrRoll = (ADC + roll1) / 2;
133
                        else                                       AdValueGyrRoll = ADC + roll1; // gain is 2 times lower on FC 1.1
133
                        else                                       AdValueGyrRoll = ADC + roll1; // gain is 2 times lower on FC 1.1
134
            adc_channel = 2; // set next channel to ADC2 = NICK GYRO
134
            adc_channel = 2; // set next channel to ADC2 = PITCH GYRO
135
            break;
135
            break;
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        case 8:
136
        case 8:
137
                // average over two samples to create current ADValueNick
137
                // average over two samples to create current ADValuePitch
138
            if(BoardRelease == 10)  AdValueGyrNick = (ADC + nick1) / 2;
138
            if(BoardRelease == 10)  AdValueGyrPitch = (ADC + pitch1) / 2;
139
                        else                                       AdValueGyrNick = ADC + nick1; // gain is 2 times lower on FC 1.1
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                        else                                       AdValueGyrPitch = ADC + pitch1; // gain is 2 times lower on FC 1.1
140
            adc_channel = 5; // set next channel to ADC5 = ACC_Z
140
            adc_channel = 5; // set next channel to ADC5 = ACC_Z
141
            break;
141
            break;
142
       case 9:
142
       case 9:
143
                // get z acceleration
143
                // get z acceleration
144
            AdValueAccTop =  (int16_t) ADC - NeutralAccZ; // get plain acceleration in Z direction
144
            AdValueAccTop =  (int16_t) ADC - NeutralAccZ; // get plain acceleration in Z direction
145
            AdValueAccTop += abs(Current_AccY) / 4 + abs(Current_AccX) / 4;
145
            AdValueAccTop += abs(Current_AccY) / 4 + abs(Current_AccX) / 4;
146
            if(AdValueAccTop > 1)
146
            if(AdValueAccTop > 1)
147
             {
147
             {
148
              if(NeutralAccZ < 800) NeutralAccZ+= 0.02;
148
              if(NeutralAccZ < 800) NeutralAccZ+= 0.02;
149
             }
149
             }
150
             else if(AdValueAccTop < -1)
150
             else if(AdValueAccTop < -1)
151
             {
151
             {
152
              if(NeutralAccZ > 600) NeutralAccZ-= 0.02;
152
              if(NeutralAccZ > 600) NeutralAccZ-= 0.02;
153
             }
153
             }
154
            messanzahl_AccHoch = 1;
154
            messanzahl_AccHoch = 1;
155
            Current_AccZ = ADC;
155
            Current_AccZ = ADC;
156
            Mess_Integral_Hoch += AdValueAccTop;      // Integrieren
156
            Reading_Integral_Top += AdValueAccTop;      // Integrieren
157
            Mess_Integral_Hoch -= Mess_Integral_Hoch / 1024; // dämfen
157
            Reading_Integral_Top -= Reading_Integral_Top / 1024; // dämfen
158
                adc_channel = 3; // set next channel to ADC3 = air pressure
158
                adc_channel = 3; // set next channel to ADC3 = air pressure
159
            break;
159
            break;
160
        case 10:
160
        case 10:
161
            tmpLuftdruck += ADC; // sum vadc values
161
            tmpAirPressure += ADC; // sum vadc values
162
            if(++messanzahl_Druck >= 5) // if 5 values are summerized for averaging
162
            if(++messanzahl_Druck >= 5) // if 5 values are summerized for averaging
163
                {
163
                {
164
                MessLuftdruck = ADC; // update measured air pressure
164
                ReadingAirPressure = ADC; // update measured air pressure
165
                messanzahl_Druck = 0; // reset air pressure measurement counter
165
                messanzahl_Druck = 0; // reset air pressure measurement counter
166
                                HoeheD = (int16_t)(StartLuftdruck - tmpLuftdruck - HoehenWert);  // D-Anteil = neuerWert - AlterWert
166
                                HoeheD = (int16_t)(StartAirPressure - tmpAirPressure - ReadingHight);  // D-Anteil = neuerWert - AlterWert
167
                Luftdruck = (tmpLuftdruck + 3 * Luftdruck) / 4; // averaging using history
167
                AirPressure = (tmpAirPressure + 3 * AirPressure) / 4; // averaging using history
168
                HoehenWert = StartLuftdruck - Luftdruck;
168
                ReadingHight = StartAirPressure - AirPressure;
169
                tmpLuftdruck = 0;
169
                tmpAirPressure = 0;
170
                }
170
                }
171
            adc_channel = 0; // set next channel to ADC0 = GIER GYRO
171
            adc_channel = 0; // set next channel to ADC0 = GIER GYRO
172
            state = 0; // reset state
172
            state = 0; // reset state
173
            break;
173
            break;
174
        default:
174
        default:
175
            adc_channel = 0;
175
            adc_channel = 0;
176
            state = 0;
176
            state = 0;
177
            break;
177
            break;
178
        }
178
        }
179
    // set adc muxer to next adc_channel
179
    // set adc muxer to next adc_channel
180
    ADMUX = (ADMUX & 0xE0) | adc_channel;
180
    ADMUX = (ADMUX & 0xE0) | adc_channel;
181
    // ??
181
    // ??
182
    if(state != 0) ADC_Enable();
182
    if(state != 0) ADC_Enable();
183
}
183
}
184
 
184