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annotate src/calibrate.asm @ 578:2b8ef780cfa8

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work in progress...
author heinrichsweikamp
date Sun, 18 Feb 2018 21:04:54 +0100
parents 54346c651b6a
children b455b31ce022
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ;=============================================================================
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2 ;
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3 ; File calibration.asm REFACTORED VERSION V2.91
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4 ;
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5 ; o2 sensor calibration subroutines
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6 ;
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7 ; Copyright (c) 2014, Heinrichs Weikamp, all right reserved.
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8 ;=============================================================================
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9
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10 #include "hwos.inc"
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11 #include "shared_definitions.h" ; Mailbox between c and asm
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12 #include "math.inc"
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13 #include "adc_lightsensor.inc"
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14 #include "eeprom_rs232.inc"
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15
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16 calibrate CODE
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17
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18 global check_sensors ; Check O2 sensor thresholds for fallback and voting logic
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19 check_sensors:
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20 ; Check min_mv
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21 movff o2_mv_sensor1+0, sub_a+0
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22 movff o2_mv_sensor1+1, sub_a+1
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23 movlw LOW min_mv
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24 movwf sub_b+0
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25 movlw HIGH min_mv
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26 movwf sub_b+1
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27 call sub16 ; sub_c = sub_a - sub_b
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28 bsf use_O2_sensor1 ;=1: Use this sensor for deco
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29 btfsc neg_flag
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30 bcf use_O2_sensor1 ;=1: Use this sensor for deco
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31
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32 movff o2_mv_sensor2+0, sub_a+0
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33 movff o2_mv_sensor2+1, sub_a+1
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34 movlw LOW min_mv
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35 movwf sub_b+0
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36 movlw HIGH min_mv
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37 movwf sub_b+1
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38 call sub16 ; sub_c = sub_a - sub_b
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39 bsf use_O2_sensor2 ;=1: Use this sensor for deco
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40 btfsc neg_flag
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41 bcf use_O2_sensor2 ;=1: Use this sensor for deco
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43 movff o2_mv_sensor3+0, sub_a+0
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44 movff o2_mv_sensor3+1, sub_a+1
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45 movlw LOW min_mv
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46 movwf sub_b+0
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47 movlw HIGH min_mv
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48 movwf sub_b+1
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49 call sub16 ; sub_c = sub_a - sub_b
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50 bsf use_O2_sensor3 ;=1: Use this sensor for deco
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51 btfsc neg_flag
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52 bcf use_O2_sensor3 ;=1: Use this sensor for deco
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53
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54 ; Check max_mv
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55 movff o2_mv_sensor1+0, sub_a+0
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56 movff o2_mv_sensor1+1, sub_a+1
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57 movlw LOW max_mv
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58 movwf sub_b+0
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59 movlw HIGH max_mv
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60 movwf sub_b+1
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61 call sub16 ; sub_c = sub_a - sub_b
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62 btfss neg_flag
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63 bcf use_O2_sensor1 ;=1: Use this sensor for deco
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65 movff o2_mv_sensor2+0, sub_a+0
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66 movff o2_mv_sensor2+1, sub_a+1
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67 movlw LOW max_mv
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68 movwf sub_b+0
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69 movlw HIGH max_mv
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70 movwf sub_b+1
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71 call sub16 ; sub_c = sub_a - sub_b
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72 btfss neg_flag
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73 bcf use_O2_sensor2 ;=1: Use this sensor for deco
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75 movff o2_mv_sensor3+0, sub_a+0
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76 movff o2_mv_sensor3+1, sub_a+1
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77 movlw LOW max_mv
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78 movwf sub_b+0
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79 movlw HIGH max_mv
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80 movwf sub_b+1
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81 call sub16 ; sub_c = sub_a - sub_b
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82 btfss neg_flag
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83 bcf use_O2_sensor3 ;=1: Use this sensor for deco
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85 btfss hud_connection_ok ;=1: HUD connection ok
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86 bra check_sensor2 ; No HUD/Digital data
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87
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88 ; Copy disable flags from digital input
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89 btfss sensor1_active
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90 bcf use_O2_sensor1
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91 btfss sensor2_active
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92 bcf use_O2_sensor2
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93 btfss sensor3_active
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94 bcf use_O2_sensor3
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95 bra check_sensor3 ; Check for voting logic
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96
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97 check_sensor2:
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98 ; Copy disable flags from internal calibration routine
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99 btfss sensor1_calibrated_ok
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100 bcf use_O2_sensor1
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101 btfss sensor2_calibrated_ok
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102 bcf use_O2_sensor2
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103 btfss sensor3_calibrated_ok
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104 bcf use_O2_sensor3
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105 check_sensor3: ; Check for voting logic
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106 ; bcf voting_logic_sensor3 ; Yes, ignore this sensor
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107 return
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108
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109
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110 global calibrate_mix
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111 calibrate_mix:
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112 ; calibrate S8 HUD
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113 btfss s8_digital ; S8 Digital?
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114 bra calibrate_mix2 ; No
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115
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116 ; Yes, calibrate any S8-connected HUD
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117 clrf temp1 ; Chksum
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118 movlw 0xAA ; Start Byte
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119 addwf temp1,F
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120 movff WREG,TXREG2
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121 call rs232_wait_tx2
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122
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123 movlw 0x31 ; Calibrate
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124 addwf temp1,F
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125 movff WREG,TXREG2
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126 call rs232_wait_tx2
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127
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128 movff opt_calibration_O2_ratio,WREG ; Calibration gas %O2
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129 addwf temp1,F
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130 movff WREG,TXREG2
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131 call rs232_wait_tx2
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132
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133 movff amb_pressure+0,WREG ; Ambient pressure
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134 addwf temp1,F
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135 movff WREG,TXREG2
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136 call rs232_wait_tx2
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137 movff amb_pressure+1,WREG
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138 addwf temp1,F
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139 movff WREG,TXREG2
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140 call rs232_wait_tx2
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141
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142 movff temp1,TXREG2 ; Chksum
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143 call rs232_wait_tx2
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144
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145 calibrate_mix2:
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146 movff opt_calibration_O2_ratio,WREG ; Calibration gas %O2
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147 mullw .100
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148 movff PRODL,xA+0
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149 movff PRODH,xA+1
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150 ; (%O2*100)*[ambient,mbar]/100 -> xC
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151 movff amb_pressure+0,xB+0
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152 movff amb_pressure+1,xB+1
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153 rcall calibrate_mix2_helper
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154 movff o2_mv_sensor1+0,xB+0
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155 movff o2_mv_sensor1+1,xB+1
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156 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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157 ; xC= ppO2/mV
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158 movff xC+0,opt_x_s1+0
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159 movff xC+1,opt_x_s1+1 ; Factor for Sensor1
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160
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161 movff opt_calibration_O2_ratio,WREG ; Calibration gas %O2
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162 mullw .100
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163 movff PRODL,xA+0
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164 movff PRODH,xA+1
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165 ; (%O2*100)*[ambient,mbar]/100 -> xC
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166 movff amb_pressure+0,xB+0
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167 movff amb_pressure+1,xB+1
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168 rcall calibrate_mix2_helper
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169 movff o2_mv_sensor2+0,xB+0
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170 movff o2_mv_sensor2+1,xB+1
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171 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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172 ; xC= ppO2/mV
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173 movff xC+0,opt_x_s2+0
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174 movff xC+1,opt_x_s2+1 ; Factor for Sensor2
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175
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176 movff opt_calibration_O2_ratio,WREG ; Calibration gas %O2
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177 mullw .100
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178 movff PRODL,xA+0
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179 movff PRODH,xA+1
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180 ; (%O2*100)*[ambient,mbar]/100 -> xC
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181 movff amb_pressure+0,xB+0
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182 movff amb_pressure+1,xB+1
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183 rcall calibrate_mix2_helper
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184 movff o2_mv_sensor3+0,xB+0
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185 movff o2_mv_sensor3+1,xB+1
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186 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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187 ; xC= ppO2/mV
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188 movff xC+0,opt_x_s3+0
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189 movff xC+1,opt_x_s3+1 ; Factor for Sensor3
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190
189
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191 bsf sensor1_calibrated_ok
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192 bsf sensor2_calibrated_ok
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193 bsf sensor3_calibrated_ok ; Set flags prior check
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194
189
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195 rcall check_sensors ; Check O2 sensor thresholds min_mv and max_mv and set use_02_sensorX flags
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196 ; initialise internal calibration flags
192
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197 btfss use_O2_sensor1 ; Sensor out of range?
189
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198 bcf sensor1_calibrated_ok ; Yes, disable this sensor
192
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199 btfss use_O2_sensor2 ; Sensor out of range?
189
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200 bcf sensor2_calibrated_ok ; Yes, disable this sensor
192
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201 btfss use_O2_sensor3 ; Sensor out of range?
189
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202 bcf sensor3_calibrated_ok ; Yes, disable this sensor
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203
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204 ; When no sensor is found, enable all three to show error state
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205 btfsc use_O2_sensor1
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206 return
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207 btfsc use_O2_sensor2
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208 return
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209 btfsc use_O2_sensor3
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210 return
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211 bsf use_O2_sensor1
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212 bsf use_O2_sensor2
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213 bsf use_O2_sensor3
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214 ; Clear factors
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215 banksel opt_x_s1+0
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216 clrf opt_x_s1+0
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217 clrf opt_x_s1+1
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218 clrf opt_x_s2+0
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219 clrf opt_x_s2+1
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220 clrf opt_x_s3+0
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221 clrf opt_x_s3+1
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222 banksel common
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223 return
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224
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225
448
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226 calibrate_mix2_helper:
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227 call mult16x16 ; xA*xB=xC
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228 movlw LOW .100
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229 movwf xB+0
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230 movlw HIGH .100
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231 movwf xB+1
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232 goto div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder (And return)
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233
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234
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235 global compute_mvolts_for_all_sensors
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236 compute_mvolts_for_all_sensors: ; Compute mV or all sensors (S8 Mode)
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237 ; compute AD results in 100µV steps (16bit/sensor)
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238 ; 24bit AD result is in 244,1406541nV
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239 ; Devide 24bit value through 409,5999512 -> 410 (0,01% error)
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240 #DEFINE ad2mv_factor .410
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241 ; Sensor 1
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242 clrf xC+3
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243 movff s8_rawdata_sensor1+2,xC+2
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244 movff s8_rawdata_sensor1+1,xC+1
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245 movff s8_rawdata_sensor1+0,xC+0
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246 movlw LOW ad2mv_factor
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247 movwf xB+0
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248 movlw HIGH ad2mv_factor
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249 movwf xB+1
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250 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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251 movff xC+1,o2_mv_sensor1+1
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252 movff xC+0,o2_mv_sensor1+0 ; in 100uV steps
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253 ; Sensor 2
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254 clrf xC+3
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255 movff s8_rawdata_sensor2+2,xC+2
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256 movff s8_rawdata_sensor2+1,xC+1
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257 movff s8_rawdata_sensor2+0,xC+0
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258 movlw LOW ad2mv_factor
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259 movwf xB+0
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260 movlw HIGH ad2mv_factor
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261 movwf xB+1
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262 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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263 movff xC+1,o2_mv_sensor2+1
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264 movff xC+0,o2_mv_sensor2+0 ; in 100uV steps
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265 ; Sensor 3
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266 clrf xC+3
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267 movff s8_rawdata_sensor3+2,xC+2
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268 movff s8_rawdata_sensor3+1,xC+1
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269 movff s8_rawdata_sensor3+0,xC+0
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270 movlw LOW ad2mv_factor
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271 movwf xB+0
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272 movlw HIGH ad2mv_factor
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273 movwf xB+1
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274 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder
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275 movff xC+1,o2_mv_sensor3+1
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276 movff xC+0,o2_mv_sensor3+0 ; in 100uV steps
113
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277
560
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278 bcf new_s8_data_available ; Clear flag
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279 return ; Done.
113
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280
560
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281
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282
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283 global transmit_setpoint ; Transmit current setpoint from WREG (in cbar) to external electronics
352
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284 transmit_setpoint:
448
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285 return
352
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286 btfss s8_digital ; S8 Digital?
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287 return ; No, ignore
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288
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289 ; Yes, transmit setpoint from WREG
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290 movwf temp2 ; Store setpoint
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291 clrf temp1 ; Chksum
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292 movlw 0xAA ; Start Byte
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293 addwf temp1,F
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294 movff WREG,TXREG2
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295 call rs232_wait_tx2
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296
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297 movlw 0x60 ; New SP
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298 addwf temp1,F
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299 movff WREG,TXREG2
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300 call rs232_wait_tx2
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301
560
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302 movff temp2,WREG ; SP in cbar
352
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303 addwf temp1,F
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304 movff WREG,TXREG2
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305 call rs232_wait_tx2
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306
560
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307 movff temp1,TXREG2 ; Chksum
352
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308 call rs232_wait_tx2
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309 return
113
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310
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311
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312 END