annotate code_part1/OSTC_code_asm_part1/altimeter.asm @ 514:3e9904d3c040

BUGFIX spurious CNS bound check.
author JeanDo
date Sun, 04 Dec 2011 17:46:13 +0100
parents 6e57b5bb98ce
children ab2686087bce
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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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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 SAFE_2BYTE_COPY amb_pressure, pressureAvg ; And init first average.
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59
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60 movlw 4 ; And multiply AVG by 16 to be coherent.
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61 altimeter_reset_1:
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62 bcf STATUS,C
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63 rlcf pressureAvg+0
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64 rlcf pressureAvg+1
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65 decfsz WREG
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66 bra altimeter_reset_1
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68 rcall compute_altitude
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69
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70 movlb 1 ; Back to normal bank1.
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71 return
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72
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73 altimeter_1:
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74 ;---- Do a bank-safe 16bit summing -----------------------------------
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75 SAFE_2BYTE_COPY amb_pressure, lo ; And init first average.
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76
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77 movff lo,WREG
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78 addwf pressureSum+0,F
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79 movff hi,WREG
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80 addwfc pressureSum+1,F
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81
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82 incf pressureCount ; Increment count too.
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83 movlw .32 ; Already 32 done ?
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84 subwf pressureCount,W
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85 bnz altimeter_4 ; NO: skip update.
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86
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87 ;---- Update altitude every 32 pressure measures --------------------
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88 bcf STATUS,C ; Divide by 2, to store pressure x16
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89 rrcf pressureSum+1
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90 rrcf pressureSum+0
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91
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92 movff pressureSum+0,pressureAvg+0
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93 movff pressureSum+1,pressureAvg+1
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94
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95 rcall compute_altitude ; Compute from the averaged value...
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96
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97 clrf pressureSum+0 ; And reset sum zone for next averaging.
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98 clrf pressureSum+1
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99 clrf pressureCount
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100
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101 altimeter_4:
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102 movlb 1 ; make sure to be in normal bank1
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103 return
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104
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105 ;---- Display result -------------------------------------------------
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106 altimeter_display:
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107 GETCUSTOM8 .49 ; Check CF#49
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108 btfss WREG,0 ; Enabled ?
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109 return ; NO: return
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110
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111 WIN_TOP .35 ; Custom view drawing zone...
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112 WIN_LEFT .90
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113 WIN_INVERT .0
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114 WIN_FONT .0
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115 call PLED_standard_color
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116
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117 STRCPY TXT_ALT5
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118
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119 movff altitude+0,lo ; BANK-SAFE read altitude
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120 movff altitude+1,hi
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121 btfss hi,7 ; Is altitude negativ ?
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122 bra altimeter_2 ; No: just print it
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123
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124 PUTC '-' ; Yes: print the minus sign
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125 comf hi ; And do a 16bit 2-complement.
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126 comf lo
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127 infsnz lo
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128 incf hi
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129
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130 altimeter_2:
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131 bsf leftbind
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132 output_16
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133 bcf leftbind
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134
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135 STRCAT_PRINT TXT_METER5
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136 return
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137
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138 ;=============================================================================
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139 ; Compute altitude, using the formula:
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140 ; H(P) = 18.787 log10(P0/P) (Log base 10)
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141
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142 ;---- Interface the the Mayh library -----------------------------------------
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143 extern __AARGB2 ; A float in fA2, fA1, fA0, fAExo
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144 extern __BARGB2 ; B float in fB2, fB1, fB0, fBExo
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145 extern FLO1632U ; convert uint16 fA+1 --> fp32 fA
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146 extern FPD32 ; fp32 divide fA/fB --> fA
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147 extern FPM32 ; fp32 multiply fA*fB --> fA
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148 extern INT3216 ; convert fp32 fA --> int16 fA+1
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149 #define fA __AARGB2
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150 #define fB __BARGB2
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151
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152 ;---- Interface to the C library ---------------------------------------------
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153 extern __AARGB3
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154 extern log10 ; float32 log(auto float32)
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155 #define fRet __AARGB3
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156
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157 compute_altitude:
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158 ; Setup C-code stack, to enable calling the log() function.
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159 lfsr FSR1, c_code_data_stack
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160 lfsr FSR2, c_code_data_stack
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161
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162 ; Convert pressure to float, --> fB
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163 movff pressureAvg+0, fA+1
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164 movff pressureAvg+1, fA+2
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165 call FLO1632U ; u16 fA[1:2] --> fp32 fA
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166 movff fA+0, fB+0
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167 movff fA+1, fB+1
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168 movff fA+2, fB+2
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169 movff fA+3, fB+3
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170
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171 ; Convert sea-level reference pressure to float, --> fB
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172 movff pressureRef+0, fA+1 ; Get sea level pressure.
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173 movff pressureRef+1, fA+2
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174 bcf STATUS,C ; Multiply by 4.
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175 rlcf fA+1
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176 rlcf fA+2
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177 bcf STATUS,C
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178 rlcf fA+1
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179 rlcf fA+2
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180 call FLO1632U ; to float: u16 fA[1:2] --> fp32 fA
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181
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182 ; Divide
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183 call FPD32 ; fp32 X/Y --> X
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184
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185 ; log10()
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186 movff fA+0, POSTINC1 ; Push X to stack
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187 movff fA+1, POSTINC1
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188 movff fA+2, POSTINC1
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189 movff fA+3, POSTINC1
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190 call log10 ; log(P0/P)
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191
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192 movf POSTDEC1,F,ACCESS ; pop argument
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193 movf POSTDEC1,F,ACCESS
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194 movf POSTDEC1,F,ACCESS
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195 movf POSTDEC1,F,ACCESS
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196
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197 ; Move log10(P0/P) to fB
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198 movff fRet+0,fB+0 ; move result to fB
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199 movff fRet+1,fB+1
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200 movff fRet+2,fB+2
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201 movff fRet+3,fB+3
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202
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203 ; Multiply by scaling factor for meters, and standatd atmosphere.
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204 movlw LOW(.18787)
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205 movff WREG, fA+1
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206 movlw HIGH(.18787)
2907b42c195b Altimeter:
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parents:
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207 movff WREG, fA+2
2907b42c195b Altimeter:
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parents:
diff changeset
208 call FLO1632U ; u16 fA[1:2] --> fp32 fA
2907b42c195b Altimeter:
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parents:
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209 call FPM32 ; altitute --> fp32 fA
2907b42c195b Altimeter:
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parents:
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210
2907b42c195b Altimeter:
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parents:
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211 ; Convert result to int16 --> altitude.
2907b42c195b Altimeter:
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parents:
diff changeset
212 call INT3216 ; fp32 fA --> int16 fA+1
2907b42c195b Altimeter:
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parents:
diff changeset
213 movff fA+1, altitude+0
2907b42c195b Altimeter:
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parents:
diff changeset
214 movff fA+2, altitude+1
2907b42c195b Altimeter:
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parents:
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215
2907b42c195b Altimeter:
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parents:
diff changeset
216 return
2907b42c195b Altimeter:
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parents:
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217
2907b42c195b Altimeter:
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parents:
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218 ;=============================================================================
2907b42c195b Altimeter:
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parents:
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219 ; Altimeter menu
2907b42c195b Altimeter:
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parents:
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220 ;
2907b42c195b Altimeter:
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parents:
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221 ; Edit reference (where altitude = 0) pressure, while displaying corresponding
2907b42c195b Altimeter:
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parents:
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222 ; altitude.
2907b42c195b Altimeter:
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parents:
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223 ;
2907b42c195b Altimeter:
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parents:
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224 altimeter_menu:
132
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
225 movff pressureRef+0,WREG ; Make sure it is initialized...
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
226 movff pressureRef+1,fA
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
227 iorwf fA
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
228 bnz altimeter_menu_1 ; Yes: skip reset...
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
229 rcall altimeter_reset
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
230
49bb155ddfbf Fix altimeter after simulator (zero divide -> 32767m)
JeanDo
parents: 125
diff changeset
231 altimeter_menu_1:
125
2907b42c195b Altimeter:
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parents:
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232 call PLED_ClearScreen ; Menu header.
2907b42c195b Altimeter:
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233 call PLED_standard_color
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parents:
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234 call PLED_topline_box
2907b42c195b Altimeter:
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parents:
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235 WIN_INVERT .1 ; Init new Wordprocessor
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
236 DISPLAYTEXTH .288 ; Title bar
125
2907b42c195b Altimeter:
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237
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
238 movlw 2 ; Start menu on line 2.
125
2907b42c195b Altimeter:
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parents:
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239 movwf menupos
2907b42c195b Altimeter:
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parents:
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240
2907b42c195b Altimeter:
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parents:
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241 altimeter_menu_2:
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
242 WIN_INVERT 0
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
243 WIN_FONT 0
125
2907b42c195b Altimeter:
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parents:
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244 WIN_LEFT .20 ; First line:
2907b42c195b Altimeter:
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parents:
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245 WIN_TOP .35
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
246 lfsr FSR2,letter
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
247 OUTPUTTEXTH .289 ; Sea ref:
125
2907b42c195b Altimeter:
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parents:
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248
2907b42c195b Altimeter:
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249 movff pressureRef+0, lo
2907b42c195b Altimeter:
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parents:
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250 movff pressureRef+1, hi
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parents:
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251 bcf STATUS,C ; Divide ref pressure by 4
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parents:
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252 rrcf hi ; to get the integer part of it:
2907b42c195b Altimeter:
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parents:
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253 rrcf lo
2907b42c195b Altimeter:
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parents:
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254 bcf STATUS,C
2907b42c195b Altimeter:
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parents:
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255 rrcf hi
2907b42c195b Altimeter:
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parents:
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256 rrcf lo
2907b42c195b Altimeter:
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parents:
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257 bsf leftbind
2907b42c195b Altimeter:
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parents:
diff changeset
258 output_16
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parents:
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259
445
6e57b5bb98ce localisation part 1 from Sergei
heinrichsweikamp
parents: 384
diff changeset
260 STRCAT_PRINT TXT_MBAR7
125
2907b42c195b Altimeter:
JeanDo
parents:
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261
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
262 WIN_TOP .65 ; Action enable
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
263 lfsr FSR2, letter
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
264 OUTPUTTEXTH .290
125
2907b42c195b Altimeter:
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parents:
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265 GETCUSTOM8 .49
2907b42c195b Altimeter:
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parents:
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266 btfss WREG,0
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parents:
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267 bra alt_menu_1
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
268 OUTPUTTEXT .130 ; ON
125
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parents:
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269 bra alt_menu_2
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parents:
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270 alt_menu_1:
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
271 OUTPUTTEXT .131 ; OFF
125
2907b42c195b Altimeter:
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272 alt_menu_2:
199
f5e9db793dd3 Minor missing translations
JeanDo
parents: 174
diff changeset
273 call word_processor
125
2907b42c195b Altimeter:
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parents:
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274
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
275 DISPLAYTEXTH .291 ; Action reset
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
276 DISPLAYTEXTH .292 ; Action add
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
277 DISPLAYTEXTH .293 ; Action sub
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
278 DISPLAYTEXT .011 ; Action exit
125
2907b42c195b Altimeter:
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parents:
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279
174
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
280 WIN_LEFT .85 ; Bottom right.
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
281 lfsr FSR2, letter
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
282 OUTPUTTEXTH .294 ; "Alt: "
53b16a746166 Multi-lang
JeanDo
parents: 170
diff changeset
283
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
284 movff altitude+0, lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
285 movff altitude+1, hi
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
286 btfss hi,7 ; Is altitude negativ ?
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
287 bra altimeter_menu_3 ; No: just print it
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
288
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
289 PUTC '-' ; Yes: print the minus sign
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
290 comf hi ; And do a 16bit 2-complement.
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
291 comf lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
292 infsnz lo
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
293 incf hi
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
294
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
295 altimeter_menu_3:
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
296 bsf leftbind
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
297 output_16
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
298 bcf leftbind
445
6e57b5bb98ce localisation part 1 from Sergei
heinrichsweikamp
parents: 384
diff changeset
299 STRCAT_PRINT TXT_METER5
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
300
125
2907b42c195b Altimeter:
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parents:
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301 alt_menu_loop:
2907b42c195b Altimeter:
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parents:
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302 call PLED_menu_cursor ; Display cursor
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
303 bcf switch_left ; reset buttons state
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
304 bcf switch_right
2907b42c195b Altimeter:
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parents:
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305
2907b42c195b Altimeter:
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parents:
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306 alt_menu_loop1: ; Wait for button.
337
6bdf80d7276c Added screen dumps of general menus.
JeanDo
parents: 214
diff changeset
307 btfsc uart_dump_screen ; Asked to dump screen contains ?
6bdf80d7276c Added screen dumps of general menus.
JeanDo
parents: 214
diff changeset
308 call dump_screen ; Yes!
6bdf80d7276c Added screen dumps of general menus.
JeanDo
parents: 214
diff changeset
309
125
2907b42c195b Altimeter:
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parents:
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310 btfsc switch_right ; [[MENU]] button
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
311 bra alt_menu_next
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
312
2907b42c195b Altimeter:
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parents:
diff changeset
313 btfsc switch_left ;[[ENTER]] button
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
314 bra alt_menu_do_it
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
315
2907b42c195b Altimeter:
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parents:
diff changeset
316 btfsc divemode ; Diving stared ?
2907b42c195b Altimeter:
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parents:
diff changeset
317 goto restart ; YES: quit this menu !
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
318
2907b42c195b Altimeter:
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parents:
diff changeset
319 btfsc onesecupdate ; Check what should be every 1sec.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
320 call timeout_surfmode
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
321
2907b42c195b Altimeter:
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parents:
diff changeset
322 btfsc onesecupdate
2907b42c195b Altimeter:
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parents:
diff changeset
323 call set_dive_modes
2907b42c195b Altimeter:
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parents:
diff changeset
324
2907b42c195b Altimeter:
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parents:
diff changeset
325 bcf onesecupdate ; end of 1sek. tasks
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
326
2907b42c195b Altimeter:
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parents:
diff changeset
327 btfsc sleepmode ; Sleep mode entered ?
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
328 bra alt_menu_exit
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
329
2907b42c195b Altimeter:
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parents:
diff changeset
330 bra alt_menu_loop1
2907b42c195b Altimeter:
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parents:
diff changeset
331
2907b42c195b Altimeter:
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parents:
diff changeset
332 ;---- Move to next line ------------------------------------------------------
2907b42c195b Altimeter:
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parents:
diff changeset
333
2907b42c195b Altimeter:
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parents:
diff changeset
334 alt_menu_next:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
335 incf menupos ; next line.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
336 movlw .7
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
337 cpfseq menupos ; Below last line ?
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
338 bra alt_menu_loop
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
339 movlw .2 ; Yes: back to line no 2.
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
340 movwf menupos
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
341 bra alt_menu_loop
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
342
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
343 ;----- Execute menu line -----------------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
344
2907b42c195b Altimeter:
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parents:
diff changeset
345 alt_menu_do_it:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
346 movf menupos,W ; test line value
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
347 addlw -2
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
348 bz alt_menu_enable ; 2 --> reset
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
349 dcfsnz WREG
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
350 bra alt_menu_reset ; 3 --> +1
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
351 dcfsnz WREG
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
352 bra alt_menu_plus1 ; 4 --> +1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
353 dcfsnz WREG
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
354 bra alt_menu_minus1 ; 5 --> -1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
355 bra alt_menu_exit ; else --> exit
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
356
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
357 ;---- Toggle altimeter (CF#49) -----------------------------------------------
2907b42c195b Altimeter:
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parents:
diff changeset
358 alt_menu_enable:
2907b42c195b Altimeter:
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parents:
diff changeset
359 GETCUSTOM8 .49 ; Read CF#49
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
360 btg WREG,0 ; Toggle boolean value
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
361 movwf EEDATA
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
362 movlw d'1' ; Upper EEPROM Bank
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
363 movwf EEADRH
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
364 movlw 4*(.49-.32) + 0x82 ; CF#49 low byte address in EEPROM
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
365 movwf EEADR
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
366 call write_eeprom
384
904863f96582 Work-Around for "Reset all" overwriting 0x00 to 0x04 in EEPROM Bank1
heinrichsweikamp
parents: 344
diff changeset
367 clrf EEADRH ; Reset EEADRH for compatibility
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
368 bra altimeter_menu_2
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
369
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
370 ;---- Reset sea level pressure to reference ----------------------------------
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
371 alt_menu_reset:
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
372 rcall altimeter_reset
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
373 bra altimeter_menu_2
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
374
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
375 ;---- Increment sea level pressure -------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
376 alt_menu_plus1:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
377 movlb HIGH(pressureRef) ; Setup our own ram bank
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
378 movlw 4
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
379 addwf pressureRef+0,F ; 16bit inc.
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
380 movlw 0
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
381 addwfc pressureRef+1,F
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
382 bra alt_menu_recompute ; then recompute altitude.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
383
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
384 ;---- Decrement sea level pressure -------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
385 alt_menu_minus1:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
386 movlb HIGH(pressureRef) ; Setup our own ram bank
170
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
387 movlw -4
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
388 addwf pressureRef+0,F ; 16bit decrement
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
389 movlw -1
0f7ca37b1412 Altimeter: auto reset
JeanDo
parents: 166
diff changeset
390 addwfc pressureRef+1,F
125
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
391
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
392 alt_menu_recompute:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
393 rcall compute_altitude ; Recompute altitude
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
394 movlb 1 ; Go back to normal bank1
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
395 bra altimeter_menu_2
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
396
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
397 ;---- Exit altimeter menu ----------------------------------------------------
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
398 alt_menu_exit:
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
399 movlw .5 ; reset position to Altimeter line.
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
400 movwf menupos ;
2907b42c195b Altimeter:
JeanDo
parents:
diff changeset
401 goto more_menu2 ; in the More... menu.