annotate code_part1/OSTC_code_asm_part1/altimeter.asm @ 327:6544f79e298c

Preparations for stable release (CF reset)
author heinrichsweikamp
date Sat, 07 May 2011 18:59:33 +0200
parents 8a0bbe43df65
children 6bdf80d7276c 2144f19fa1eb
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1 ;=============================================================================
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2 ;
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3 ; File altimeter.asm
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4 ;
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5 ; Altimeter function prototype.
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6 ;
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7 ; This program is free software: you can redistribute it and/or modify
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8 ; it under the terms of the GNU General Public License as published by
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9 ; the Free Software Foundation, either version 3 of the License, or
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10 ; (at your option) any later version.
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11 ;
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12 ; This program is distributed in the hope that it will be useful,
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13 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 ; GNU General Public License for more details.
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16 ;
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17 ; You should have received a copy of the GNU General Public License
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18 ; along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 ;
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20 ; Copyright (c) 2010, JD Gascuel.
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21 ;=============================================================================
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22 ; HISTORY
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23 ; 2010-12-15 : [jDG] First prototype with quadratic polynomial ant tp°.
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24 ; 2010-12-28 : [jDG] Use MPLAB Math and C libraries for FP32 computations.
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25 ; 2011-01-02 : [jDG] Edit reference pressure by 0.25 mbar.
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26 ; 2011-01-31 : [jDG] Better menu: default 1013mbar, and editing by +/- 1mbar.
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27 ; 2011-02-23 : [jDG] Fix restart after sleepmode.
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28 ;
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29 ; Known bug: Simulator reset altitude and reference...
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30
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31 altimeter_calc:
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32 movlb HIGH(pressureAvg) ; Altimeter data in bank 0.
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33
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34 movlw HIGH(4*.900) ; Is presure ref bigger than 900mbar
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35 cpfsgt pressureRef+1
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36 bra altimeter_reset ; No: Should do a reset now.
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37
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38 movlw HIGH(4*.1100) ; Is ref pressure bigger than 1100mbar ?
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39 cpfsgt pressureRef+1
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40 bra altimeter_1 ; No: ok it is valid...
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41
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42 ; Reset calibration value to default.
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43 altimeter_reset:
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44 movlb HIGH(pressureAvg) ; Altimeter data in bank 0.
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45 movlw LOW(4*.1013+1) ; Init see level at 1013,25 mbar.
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46 movwf pressureRef+0
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47 movlw HIGH(4*.1013+1)
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48 movwf pressureRef+1
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49
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d19445e0cb2f BUGFIX Altimeter reset when exiting sleep mode (bug#&6).
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50 ; Restart averaging. Eg. after a sleep, enables to faster restart with correct
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51 ; values...
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52 altimeter_restart:
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53 movlb HIGH(pressureAvg) ; Altimeter data in bank 0.
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54 clrf pressureSum+0 ; Init averaging area
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55 clrf pressureSum+1
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56 clrf pressureCount
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57
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58 movff amb_pressure+0,pressureAvg+0 ; And init first average.
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59 movff amb_pressure+1,pressureAvg+1
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60
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61 movlw 4 ; And multiply AVG by 16 to be coherent.
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62 altimeter_reset_1:
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63 bcf STATUS,C
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64 rlcf pressureAvg+0
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65 rlcf pressureAvg+1
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66 decfsz WREG
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67 bra altimeter_reset_1
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69 rcall compute_altitude
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70
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71 movlb 1 ; Back to normal bank1.
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72 return
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73
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74 altimeter_1:
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75 ;---- Do a bank-safe 16bit summing -----------------------------------
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76 movff amb_pressure+0,WREG
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77 addwf pressureSum+0,F
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78 movff amb_pressure+1,WREG
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79 addwfc pressureSum+1,F
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80
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81 incf pressureCount ; Increment count too.
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82 movlw .32 ; Already 32 done ?
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83 subwf pressureCount,W
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84 bnz altimeter_4 ; NO: skip update.
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85
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86 ;---- Update altitude every 32 pressure measures --------------------
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87 bcf STATUS,C ; Divide by 2, to store pressure x16
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88 rrcf pressureSum+1
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89 rrcf pressureSum+0
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90
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91 movff pressureSum+0,pressureAvg+0
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92 movff pressureSum+1,pressureAvg+1
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93
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94 rcall compute_altitude ; Compute from the averaged value...
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95
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96 clrf pressureSum+0 ; And reset sum zone for next averaging.
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97 clrf pressureSum+1
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98 clrf pressureCount
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99
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100 altimeter_4:
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101 movlb 1 ; make sure to be in normal bank1
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102 return
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103
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104 ;---- Display result -------------------------------------------------
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105 altimeter_display:
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106 GETCUSTOM8 .49 ; Check CF#49
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107 btfss WREG,0 ; Enabled ?
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108 return ; NO: return
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109
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110 WIN_TOP .35 ; Custom view drawing zone...
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111 WIN_LEFT .90
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112 WIN_INVERT .0
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113 WIN_FONT .0
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114 call PLED_standard_color
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115
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80de93d72a17 Allow display of altitude <= 0m
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116 STRCPY "Alt: "
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117
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118 movff altitude+0,lo ; BANK-SAFE read altitude
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119 movff altitude+1,hi
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120 btfss hi,7 ; Is altitude negativ ?
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121 bra altimeter_2 ; No: just print it
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122
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123 PUTC '-' ; Yes: print the minus sign
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124 comf hi ; And do a 16bit 2-complement.
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125 comf lo
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126 infsnz lo
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127 incf hi
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128
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129 altimeter_2:
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130 bsf leftbind
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131 output_16
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132 bcf leftbind
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133
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134 STRCAT_PRINT "m "
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135 return
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136
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137 ;=============================================================================
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138 ; Compute altitude, using the formula:
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139 ; H(P) = 18.787 log10(P0/P) (Log base 10)
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140
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141 ;---- Interface the the Mayh library -----------------------------------------
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142 extern __AARGB2 ; A float in fA2, fA1, fA0, fAExo
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143 extern __BARGB2 ; B float in fB2, fB1, fB0, fBExo
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144 extern FLO1632U ; convert uint16 fA+1 --> fp32 fA
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145 extern FPD32 ; fp32 divide fA/fB --> fA
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146 extern FPM32 ; fp32 multiply fA*fB --> fA
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147 extern INT3216 ; convert fp32 fA --> int16 fA+1
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148 #define fA __AARGB2
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149 #define fB __BARGB2
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150
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151 ;---- Interface to the C library ---------------------------------------------
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152 extern __AARGB3
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153 extern log10 ; float32 log(auto float32)
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154 #define fRet __AARGB3
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155
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156 compute_altitude:
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157 ; Setup C-code stack, to enable calling the log() function.
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158 lfsr FSR1, c_code_data_stack
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159 lfsr FSR2, c_code_data_stack
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160
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161 ; Convert pressure to float, --> fB
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162 movff pressureAvg+0, fA+1
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163 movff pressureAvg+1, fA+2
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164 call FLO1632U ; u16 fA[1:2] --> fp32 fA
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165 movff fA+0, fB+0
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166 movff fA+1, fB+1
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167 movff fA+2, fB+2
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168 movff fA+3, fB+3
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169
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170 ; Convert sea-level reference pressure to float, --> fB
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171 movff pressureRef+0, fA+1 ; Get sea level pressure.
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172 movff pressureRef+1, fA+2
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173 bcf STATUS,C ; Multiply by 4.
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174 rlcf fA+1
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175 rlcf fA+2
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176 bcf STATUS,C
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177 rlcf fA+1
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178 rlcf fA+2
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179 call FLO1632U ; to float: u16 fA[1:2] --> fp32 fA
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180
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181 ; Divide
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182 call FPD32 ; fp32 X/Y --> X
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183
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184 ; log10()
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185 movff fA+0, POSTINC1 ; Push X to stack
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186 movff fA+1, POSTINC1
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187 movff fA+2, POSTINC1
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188 movff fA+3, POSTINC1
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189 call log10 ; log(P0/P)
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190
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191 movf POSTDEC1,F,ACCESS ; pop argument
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192 movf POSTDEC1,F,ACCESS
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193 movf POSTDEC1,F,ACCESS
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194 movf POSTDEC1,F,ACCESS
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195
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196 ; Move log10(P0/P) to fB
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197 movff fRet+0,fB+0 ; move result to fB
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198 movff fRet+1,fB+1
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199 movff fRet+2,fB+2
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200 movff fRet+3,fB+3
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201
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202 ; Multiply by scaling factor for meters, and standatd atmosphere.
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203 movlw LOW(.18787)
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204 movff WREG, fA+1
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205 movlw HIGH(.18787)
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206 movff WREG, fA+2
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207 call FLO1632U ; u16 fA[1:2] --> fp32 fA
2907b42c195b Altimeter:
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parents:
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208 call FPM32 ; altitute --> fp32 fA
2907b42c195b Altimeter:
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209
2907b42c195b Altimeter:
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parents:
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210 ; Convert result to int16 --> altitude.
2907b42c195b Altimeter:
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parents:
diff changeset
211 call INT3216 ; fp32 fA --> int16 fA+1
2907b42c195b Altimeter:
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parents:
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212 movff fA+1, altitude+0
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parents:
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213 movff fA+2, altitude+1
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parents:
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214
2907b42c195b Altimeter:
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parents:
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215 return
2907b42c195b Altimeter:
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parents:
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216
2907b42c195b Altimeter:
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parents:
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217 ;=============================================================================
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218 ; Altimeter menu
2907b42c195b Altimeter:
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parents:
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219 ;
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220 ; Edit reference (where altitude = 0) pressure, while displaying corresponding
2907b42c195b Altimeter:
JeanDo
parents:
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221 ; altitude.
2907b42c195b Altimeter:
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parents:
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222 ;
2907b42c195b Altimeter:
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parents:
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223 altimeter_menu:
132
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
224 movff pressureRef+0,WREG ; Make sure it is initialized...
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
225 movff pressureRef+1,fA
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
226 iorwf fA
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
227 bnz altimeter_menu_1 ; Yes: skip reset...
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
228 rcall altimeter_reset
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
229
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
230 altimeter_menu_1:
125
2907b42c195b Altimeter:
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parents:
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231 call PLED_ClearScreen ; Menu header.
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232 call PLED_standard_color
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233 call PLED_topline_box
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parents:
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234 WIN_INVERT .1 ; Init new Wordprocessor
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
235 DISPLAYTEXTH .288 ; Title bar
125
2907b42c195b Altimeter:
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parents:
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236
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
237 movlw 2 ; Start menu on line 2.
125
2907b42c195b Altimeter:
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238 movwf menupos
2907b42c195b Altimeter:
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parents:
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239
2907b42c195b Altimeter:
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parents:
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240 altimeter_menu_2:
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
241 WIN_INVERT 0
53b16a746166 Multi-lang
JeanDo
parents: 170
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242 WIN_FONT 0
125
2907b42c195b Altimeter:
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parents:
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243 WIN_LEFT .20 ; First line:
2907b42c195b Altimeter:
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parents:
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244 WIN_TOP .35
174
53b16a746166 Multi-lang
JeanDo
parents: 170
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245 lfsr FSR2,letter
53b16a746166 Multi-lang
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parents: 170
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246 OUTPUTTEXTH .289 ; Sea ref:
125
2907b42c195b Altimeter:
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parents:
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247
2907b42c195b Altimeter:
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248 movff pressureRef+0, lo
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parents:
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249 movff pressureRef+1, hi
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parents:
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250 bcf STATUS,C ; Divide ref pressure by 4
2907b42c195b Altimeter:
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parents:
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251 rrcf hi ; to get the integer part of it:
2907b42c195b Altimeter:
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parents:
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252 rrcf lo
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253 bcf STATUS,C
2907b42c195b Altimeter:
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parents:
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254 rrcf hi
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parents:
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255 rrcf lo
2907b42c195b Altimeter:
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parents:
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256 bsf leftbind
2907b42c195b Altimeter:
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parents:
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257 output_16
2907b42c195b Altimeter:
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parents:
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258
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
259 STRCAT_PRINT " mbar "
125
2907b42c195b Altimeter:
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parents:
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260
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
261 WIN_TOP .65 ; Action enable
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
262 lfsr FSR2, letter
53b16a746166 Multi-lang
JeanDo
parents: 170
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263 OUTPUTTEXTH .290
125
2907b42c195b Altimeter:
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parents:
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264 GETCUSTOM8 .49
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parents:
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265 btfss WREG,0
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parents:
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266 bra alt_menu_1
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
267 OUTPUTTEXT .130 ; ON
125
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parents:
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268 bra alt_menu_2
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269 alt_menu_1:
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
270 OUTPUTTEXT .131 ; OFF
125
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parents:
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271 alt_menu_2:
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
272 call word_processor
125
2907b42c195b Altimeter:
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parents:
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273
174
53b16a746166 Multi-lang
JeanDo
parents: 170
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274 DISPLAYTEXTH .291 ; Action reset
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
275 DISPLAYTEXTH .292 ; Action add
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
276 DISPLAYTEXTH .293 ; Action sub
53b16a746166 Multi-lang
JeanDo
parents: 170
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277 DISPLAYTEXT .011 ; Action exit
125
2907b42c195b Altimeter:
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parents:
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278
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
279 WIN_LEFT .85 ; Bottom right.
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
280 lfsr FSR2, letter
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
281 OUTPUTTEXTH .294 ; "Alt: "
53b16a746166 Multi-lang
JeanDo
parents: 170
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282
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
283 movff altitude+0, lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
284 movff altitude+1, hi
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
285 btfss hi,7 ; Is altitude negativ ?
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
286 bra altimeter_menu_3 ; No: just print it
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
287
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
288 PUTC '-' ; Yes: print the minus sign
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
289 comf hi ; And do a 16bit 2-complement.
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
290 comf lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
291 infsnz lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
292 incf hi
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
293
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
294 altimeter_menu_3:
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
295 bsf leftbind
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
296 output_16
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
297 bcf leftbind
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
298 STRCAT_PRINT "m "
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
299
125
2907b42c195b Altimeter:
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parents:
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300 alt_menu_loop:
2907b42c195b Altimeter:
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parents:
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301 call PLED_menu_cursor ; Display cursor
2907b42c195b Altimeter:
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parents:
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302 bcf switch_left ; reset buttons state
2907b42c195b Altimeter:
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parents:
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303 bcf switch_right
2907b42c195b Altimeter:
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parents:
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304
2907b42c195b Altimeter:
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parents:
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305 alt_menu_loop1: ; Wait for button.
2907b42c195b Altimeter:
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parents:
diff changeset
306 btfsc switch_right ; [[MENU]] button
2907b42c195b Altimeter:
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parents:
diff changeset
307 bra alt_menu_next
2907b42c195b Altimeter:
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parents:
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308
2907b42c195b Altimeter:
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parents:
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309 btfsc switch_left ;[[ENTER]] button
2907b42c195b Altimeter:
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parents:
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310 bra alt_menu_do_it
2907b42c195b Altimeter:
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parents:
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311
2907b42c195b Altimeter:
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parents:
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312 btfsc divemode ; Diving stared ?
2907b42c195b Altimeter:
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parents:
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313 goto restart ; YES: quit this menu !
2907b42c195b Altimeter:
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parents:
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314
2907b42c195b Altimeter:
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parents:
diff changeset
315 btfsc onesecupdate ; Check what should be every 1sec.
2907b42c195b Altimeter:
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parents:
diff changeset
316 call timeout_surfmode
2907b42c195b Altimeter:
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parents:
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317
2907b42c195b Altimeter:
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parents:
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318 btfsc onesecupdate
2907b42c195b Altimeter:
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parents:
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319 call set_dive_modes
2907b42c195b Altimeter:
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parents:
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320
2907b42c195b Altimeter:
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parents:
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321 bcf onesecupdate ; end of 1sek. tasks
2907b42c195b Altimeter:
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parents:
diff changeset
322
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
323 btfsc sleepmode ; Sleep mode entered ?
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
324 bra alt_menu_exit
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
325
2907b42c195b Altimeter:
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parents:
diff changeset
326 bra alt_menu_loop1
2907b42c195b Altimeter:
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parents:
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327
2907b42c195b Altimeter:
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parents:
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328 ;---- Move to next line ------------------------------------------------------
2907b42c195b Altimeter:
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parents:
diff changeset
329
2907b42c195b Altimeter:
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330 alt_menu_next:
2907b42c195b Altimeter:
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parents:
diff changeset
331 incf menupos ; next line.
2907b42c195b Altimeter:
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parents:
diff changeset
332 movlw .7
2907b42c195b Altimeter:
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parents:
diff changeset
333 cpfseq menupos ; Below last line ?
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
334 bra alt_menu_loop
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
335 movlw .2 ; Yes: back to line no 2.
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
336 movwf menupos
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
337 bra alt_menu_loop
2907b42c195b Altimeter:
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parents:
diff changeset
338
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
339 ;----- Execute menu line -----------------------------------------------------
2907b42c195b Altimeter:
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parents:
diff changeset
340
2907b42c195b Altimeter:
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parents:
diff changeset
341 alt_menu_do_it:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
342 movf menupos,W ; test line value
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
343 addlw -2
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
344 bz alt_menu_enable ; 2 --> reset
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
345 dcfsnz WREG
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
346 bra alt_menu_reset ; 3 --> +1
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
347 dcfsnz WREG
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
348 bra alt_menu_plus1 ; 4 --> +1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
349 dcfsnz WREG
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
350 bra alt_menu_minus1 ; 5 --> -1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
351 bra alt_menu_exit ; else --> exit
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
352
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
353 ;---- Toggle altimeter (CF#49) -----------------------------------------------
2907b42c195b Altimeter:
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parents:
diff changeset
354 alt_menu_enable:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
355 GETCUSTOM8 .49 ; Read CF#49
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
356 btg WREG,0 ; Toggle boolean value
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
357 movwf EEDATA
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
358 movlw d'1' ; Upper EEPROM Bank
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
359 movwf EEADRH
2907b42c195b Altimeter:
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parents:
diff changeset
360 movlw 4*(.49-.32) + 0x82 ; CF#49 low byte address in EEPROM
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
361 movwf EEADR
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
362 call write_eeprom
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
363 bra altimeter_menu_2
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
364
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
365 ;---- Reset sea level pressure to reference ----------------------------------
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
366 alt_menu_reset:
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
367 rcall altimeter_reset
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
368 bra altimeter_menu_2
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
369
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
370 ;---- Increment sea level pressure -------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
371 alt_menu_plus1:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
372 movlb HIGH(pressureRef) ; Setup our own ram bank
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
373 movlw 4
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
374 addwf pressureRef+0,F ; 16bit inc.
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
375 movlw 0
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
376 addwfc pressureRef+1,F
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
377 bra alt_menu_recompute ; then recompute altitude.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
378
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
379 ;---- Decrement sea level pressure -------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
380 alt_menu_minus1:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
381 movlb HIGH(pressureRef) ; Setup our own ram bank
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
382 movlw -4
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
383 addwf pressureRef+0,F ; 16bit decrement
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
384 movlw -1
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
385 addwfc pressureRef+1,F
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
386
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
387 alt_menu_recompute:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
388 rcall compute_altitude ; Recompute altitude
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
389 movlb 1 ; Go back to normal bank1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
390 bra altimeter_menu_2
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
391
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
392 ;---- Exit altimeter menu ----------------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
393 alt_menu_exit:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
394 movlw .5 ; reset position to Altimeter line.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
395 movwf menupos ;
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
396 goto more_menu2 ; in the More... menu.