Mercurial > public > mk2
annotate code_part1/OSTC_code_asm_part1/ms5535.asm @ 246:90af80e57b49
German texts added
| author | heinrichsweikamp |
|---|---|
| date | Tue, 29 Mar 2011 13:15:33 +0200 |
| parents | e26f49674956 |
| children | 6d8a2550c9ea |
| rev | line source |
|---|---|
| 0 | 1 ; OSTC - diving computer code |
| 2 ; Copyright (C) 2008 HeinrichsWeikamp GbR | |
| 3 | |
| 4 ; This program is free software: you can redistribute it and/or modify | |
| 5 ; it under the terms of the GNU General Public License as published by | |
| 6 ; the Free Software Foundation, either version 3 of the License, or | |
| 7 ; (at your option) any later version. | |
| 8 | |
| 9 ; This program is distributed in the hope that it will be useful, | |
| 10 ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 ; GNU General Public License for more details. | |
| 13 | |
| 14 ; You should have received a copy of the GNU General Public License | |
| 15 ; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | |
| 17 | |
| 18 ; routines for Intersema MS5535A, MS5541B and MS5541C | |
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19 ; history: |
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20 ; 2005-09-26: Written by Matthias Heinrichs, info@heinrichsweikamp.com |
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21 ; 2008-08-21: MH last updated, with second order compensation. |
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22 ; 2011-01-19: jDG Clean up using true signed arithmetics. |
| 0 | 23 ; known bugs: |
| 24 ; ToDo: | |
| 25 | |
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26 ;============================================================================= |
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27 ; Expose internal variables, to ease debug: |
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28 global D1, D2 |
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29 global C1, C2, C3, C4, C5 |
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30 global xdT, xdT2, OFF, SENS, amb_pressure |
| 0 | 31 |
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32 ;============================================================================= |
| 0 | 33 calculate_compensation: |
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34 ; calculate UT1 = 8*C5 + 10000 (u16 range 10.000 .. +42.760) |
| 0 | 35 clrf isr_xA+1 |
| 36 movlw d'8' | |
| 37 movwf isr_xA+0 | |
| 38 movff C5+0,isr_xB+0 | |
| 39 movff C5+1,isr_xB+1 | |
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40 call isr_unsigned_mult16x16 ;isr_xA*isr_xB=isr_xC |
| 0 | 41 movlw LOW d'10000' |
| 42 addwf isr_xC+0, f | |
| 43 movlw HIGH d'10000' | |
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44 addwfc isr_xC+1, f ;isr_xC= 8*C5 + 10000 |
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45 |
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46 ; xdT = D2 - UT1 (s16 range -11.400 .. +12.350) |
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47 movf isr_xC+0,W ; Get Value to be subtracted |
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48 subwf D2+0,W ; Do the Low Byte |
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49 movwf xdT+0 |
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50 movf isr_xC+1,W ; Then the high byte. |
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51 subwfb D2+1,W |
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52 movwf xdT+1 |
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53 |
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54 ; Second order temperature calculation |
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55 ; xdT/128 is in range -89..+96, hence signed 8bit. dT/128 = (2*dT)/256 |
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56 rlcf xdT+0,W ; put hit bit in carry. |
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57 rlcf xdT+1,W ; inject in high byte. |
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58 movwf isr_xA+0 ; and put result in low byte. |
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59 clrf isr_xA+1 |
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60 btfsc xdT+1,7 ; If dT < 0 |
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61 setf isr_xA+1 ; then signextend to -1 |
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62 movff isr_xA+0,isr_xB+0 ; copy A to B |
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63 movff isr_xA+1,isr_xB+1 |
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64 call isr_signed_mult16x16 ; dT*dT --> xC (32 bits) |
| 0 | 65 |
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66 ; dT >= 0: divide by 8, ie. 3 shifts rights. |
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67 ; dT < 0: divide by 2, ie. 1 shifts rights. |
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68 movlw .3 |
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69 btfss xdT+1,7 ; Was dT negatif ? |
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70 movlw .1 |
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71 calc_loop_1: |
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72 bcf STATUS,C ;dT^2 is positiv, so injected zeros. |
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73 rrcf isr_xC+1,F |
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74 rrcf isr_xC+0,F |
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75 decfsz WREG |
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76 bra calc_loop_1 |
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77 |
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78 movf isr_xC+0,W ; dT2 = dT - (dT/128)*(dT/128)/(2 ...or... 8) |
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79 subwf xdT+0,W |
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80 movwf xdT2+0 |
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81 movf isr_xC+1,W |
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82 subwfb xdT+1,W |
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83 movwf xdT2+1 |
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85 ; Calculate OFF = C2 + ((C4-250)*dT2)/2^12 + 10000 |
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86 ; (range +9.246 .. +18.887) |
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87 movlw LOW(-.250) ; C4 - 250 --> A |
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88 addwf C4+0,W |
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89 movwf isr_xA+0 |
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90 movlw -1 ; HIGH(- .250) is not hunderstood... |
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91 addwfc C4+1,W |
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92 movwf isr_xA+1 |
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93 |
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94 movff xdT2+0,isr_xB+0 ; dT2 --> B |
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95 movff xdT2+1,isr_xB+1 |
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96 call isr_signed_mult16x16 |
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97 movlw .12-.8 ; A 12bit shift = 1 byte + 4 bits. |
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98 call isr_shift_C31 |
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100 movlw LOW(.10000) ; Add 10000 |
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101 addwf isr_xC+1,F |
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102 movlw HIGH(.10000) |
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103 addwfc isr_xC+2,F |
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104 |
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105 movf C2+0,W ; Add C2, and save into OFF |
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106 addwf isr_xC+1,W |
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107 movwf OFF+0 |
| 0 | 108 movf C2+1,W |
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109 addwfc isr_xC+2,W |
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110 movwf OFF+1 |
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111 |
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112 ; Calculate SENS = C1/2 + ((C3+200)*dT)/2^13 + 3000 |
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113 movlw LOW(.200) ; C3+200 --> A |
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114 addwf C3+0,W |
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115 movwf isr_xA+0 |
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116 movlw HIGH(.200) |
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117 addwfc C3+1,W |
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118 movwf isr_xA+1 |
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119 ; B still contains dT2 |
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120 call isr_signed_mult16x16 ; A*B --> C |
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121 movlw .13-.8 ; A 13bit shift = 1 byte + 5 bits. |
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122 call isr_shift_C31 |
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123 |
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124 bcf STATUS,C ; SENS = C1 / 2 |
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125 rrcf C1+1,W |
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126 movwf SENS+1 |
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127 rrcf C1+0,W |
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128 movwf SENS+0 |
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129 |
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130 movlw LOW(.3000) ; Add 3000 |
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131 addwf isr_xC+1,F |
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132 movlw HIGH(.3000) |
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133 addwfc isr_xC+2,F |
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135 movf isr_xC+1,W ; And sum into SENS |
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136 addwf SENS+0,F |
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137 movf isr_xC+2,W |
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138 addwfc SENS+1,F |
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139 |
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140 ; calculate amb_pressure = (sens * (d1-off))/2^12 + 1000 |
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141 movf OFF+0,W ; d1-off --> a |
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142 subwf D1+0,W |
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143 movwf isr_xA+0 |
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144 movf OFF+1,W |
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145 subwfb D1+1,W |
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146 movwf isr_xA+1 |
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148 movff SENS+0,isr_xB+0 ; sens --> b |
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149 movff SENS+1,isr_xB+1 |
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150 call isr_signed_mult16x16 |
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151 movlw .12-.8 ; a 12bit shift = 1 byte + 4 bits. |
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152 call isr_shift_C31 |
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153 |
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154 movlw LOW(.1000) ; add 1000, and save into amb_pressure |
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155 addwf isr_xC+1,W |
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156 movwf amb_pressure+0 |
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157 movlw HIGH(.1000) |
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158 addwfc isr_xC+2,W |
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159 movwf amb_pressure+1 |
| 0 | 160 |
| 161 btfss simulatormode_active ; are we in simulator mode? | |
| 162 bra calc_pressure_done ; no | |
| 163 | |
| 164 movff sim_pressure+0,amb_pressure+0 ; override readings with simulator values | |
| 165 movff sim_pressure+1,amb_pressure+1 | |
| 166 | |
| 167 calc_pressure_done: | |
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168 ; calculate temp = 200 + dT*(C6+100)/2^11 |
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169 movlw LOW(.100) ; C6 + 100 --> A |
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170 addwf C6+0,W |
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171 movwf isr_xA+0 |
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172 movlw HIGH(.100) |
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173 addwfc C6+1,W |
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174 movwf isr_xA+1 |
| 0 | 175 |
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176 movff xdT2+0,isr_xB+0 ; dT2 --> B |
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177 movff xdT2+1,isr_xB+1 |
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178 call isr_signed_mult16x16 ; A*B |
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179 movlw .11-.8 ; A 12bit shift = 1 byte + 3 bits. |
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180 call isr_shift_C31 |
| 0 | 181 |
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182 movlw LOW(.200) ; Add 200, and save into temperature |
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183 addwf isr_xC+1,W |
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184 movwf temperature+0 |
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185 movlw HIGH(.200) |
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186 addwfc isr_xC+2,W |
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187 movwf temperature+1 |
| 0 | 188 |
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189 bcf neg_temp |
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190 bnn calc_pos_temp ; Is Temp° negativ ? |
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191 |
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192 bsf neg_temp ; Yes: set flag and store -temp |
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193 comf temperature+1 |
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194 negf temperature+0 |
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195 btfsc STATUS,C |
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196 incf temperature+1 |
| 0 | 197 |
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198 calc_pos_temp: |
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199 return ; Fertig mit allem |
| 0 | 200 |
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201 ;============================================================================= |
| 0 | 202 get_pressure_start: |
| 203 rcall reset_MS5535A | |
| 204 movlw b'10100000' ;+3*high as start and 1+low as stop! | |
| 205 get_pressure_start2: | |
| 206 movwf isr1_temp | |
| 207 movlw d'12' | |
| 208 movwf clock_count | |
| 209 rcall send_data_MS55535A | |
| 210 return | |
| 211 | |
| 212 get_pressure_value: | |
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213 #ifndef TESTING |
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214 ; Use register injection instead when in MPLab Sim emulation... |
| 0 | 215 rcall get_2bytes_MS5535A |
| 216 movff dMSB,D1+1 | |
| 217 movff dLSB,D1+0 | |
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218 #endif |
| 0 | 219 return |
| 220 | |
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221 ;============================================================================= |
| 0 | 222 get_temperature_start: |
| 223 rcall reset_MS5535A | |
| 224 movlw b'10010000' ;+3*high as start and 1+low as stop! | |
| 225 bra get_pressure_start2 ; continue in "get_pressure" | |
| 226 | |
| 227 get_temperature_value: | |
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228 #ifndef TESTING |
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229 ; Use register injection instead... |
| 0 | 230 rcall get_2bytes_MS5535A |
| 231 movff dMSB,D2+1 | |
| 232 movff dLSB,D2+0 | |
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233 #endif |
| 0 | 234 return |
| 235 | |
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236 ;============================================================================= |
| 0 | 237 get_calibration_data: |
| 238 rcall reset_MS5535A | |
| 239 movlw d'13' | |
| 240 movwf clock_count | |
| 241 movlw b'01010100' ;+3*high as start and 1+low as stop! | |
| 242 movwf isr1_temp | |
| 243 rcall send_data_MS55535A | |
| 244 rcall get_2bytes_MS5535A | |
| 245 movff dMSB,W1+1 | |
| 246 movff dLSB,W1+0 | |
| 247 | |
| 248 movlw d'13' | |
| 249 movwf clock_count | |
| 250 movlw b'01011000' ;+3*high as start and 1+low as stop! | |
| 251 movwf isr1_temp | |
| 252 rcall send_data_MS55535A | |
| 253 rcall get_2bytes_MS5535A | |
| 254 movff dMSB,W2+1 | |
| 255 movff dLSB,W2+0 | |
| 256 | |
| 257 movlw d'13' | |
| 258 movwf clock_count | |
| 259 movlw b'01100100' ;+3*high as start and 1+low as stop! | |
| 260 movwf isr1_temp | |
| 261 rcall send_data_MS55535A | |
| 262 rcall get_2bytes_MS5535A | |
| 263 movff dMSB,W3+1 | |
| 264 movff dLSB,W3+0 | |
| 265 | |
| 266 movlw d'13' | |
| 267 movwf clock_count | |
| 268 movlw b'01101000' ;+3*high as start and 1+low as stop! | |
| 269 movwf isr1_temp | |
| 270 rcall send_data_MS55535A | |
| 271 rcall get_2bytes_MS5535A | |
| 272 movff dMSB,W4+1 | |
| 273 movff dLSB,W4+0 | |
| 274 | |
| 275 ; calculate C1 (16Bit) | |
| 276 movff W1+1, C1+1 | |
| 277 bcf STATUS,C | |
| 278 rrcf C1+1 | |
| 279 bcf STATUS,C | |
| 280 rrcf C1+1 | |
| 281 bcf STATUS,C | |
| 282 rrcf C1+1 | |
| 283 movff W1+0, C1+0 | |
| 284 bsf STATUS,C | |
| 285 btfss W1+1,0 | |
| 286 bcf STATUS,C | |
| 287 rrcf C1+0 | |
| 288 bsf STATUS,C | |
| 289 btfss W1+1,1 | |
| 290 bcf STATUS,C | |
| 291 rrcf C1+0 | |
| 292 bsf STATUS,C | |
| 293 btfss W1+1,2 | |
| 294 bcf STATUS,C | |
| 295 rrcf C1+0 | |
| 296 | |
| 297 ; calculate C2 (16Bit) | |
| 298 movff W2+0, C2+0 | |
| 299 bsf STATUS,C | |
| 300 btfss W2+1,0 | |
| 301 bcf STATUS,C | |
| 302 rrcf C2+0 | |
| 303 bsf STATUS,C | |
| 304 btfss W2+1,1 | |
| 305 bcf STATUS,C | |
| 306 rrcf C2+0 | |
| 307 bsf STATUS,C | |
| 308 btfss W2+1,2 | |
| 309 bcf STATUS,C | |
| 310 rrcf C2+0 | |
| 311 bsf STATUS,C | |
| 312 btfss W2+1,3 | |
| 313 bcf STATUS,C | |
| 314 rrcf C2+0 | |
| 315 bsf STATUS,C | |
| 316 btfss W2+1,4 | |
| 317 bcf STATUS,C | |
| 318 rrcf C2+0 | |
| 319 bsf STATUS,C | |
| 320 btfss W2+1,5 | |
| 321 bcf STATUS,C | |
| 322 rrcf C2+0 | |
| 323 | |
| 324 movff W2+1, C2+1 | |
| 325 bsf STATUS,C | |
| 326 btfss W1+0,0 | |
| 327 bcf STATUS,C | |
| 328 rrcf C2+1 | |
| 329 bsf STATUS,C | |
| 330 btfss W1+0,1 | |
| 331 bcf STATUS,C | |
| 332 rrcf C2+1 | |
| 333 bsf STATUS,C | |
| 334 btfss W1+0,2 | |
| 335 bcf STATUS,C | |
| 336 rrcf C2+1 | |
| 337 bcf STATUS,C | |
| 338 rrcf C2+1 | |
| 339 bcf STATUS,C | |
| 340 rrcf C2+1 | |
| 341 bcf STATUS,C | |
| 342 rrcf C2+1 | |
| 343 | |
| 344 ; calculate C3 (16Bit) | |
| 345 movff W3+1,C3+0 | |
| 346 bsf STATUS,C | |
| 347 btfss W3+0,7 | |
| 348 bcf STATUS,C | |
| 349 rlcf C3+0 | |
| 350 bsf STATUS,C | |
| 351 btfss W3+0,6 | |
| 352 bcf STATUS,C | |
| 353 rlcf C3+0 | |
| 354 clrf C3+1 | |
| 355 btfsc W3+1,7 | |
| 356 bsf C3+1,1 | |
| 357 btfsc W3+1,6 | |
| 358 bsf C3+1,0 | |
| 359 | |
| 360 ; calculate C4 (16Bit) | |
| 361 movff W4+1,C4+0 | |
| 362 bsf STATUS,C | |
| 363 btfss W4+0,7 | |
| 364 bcf STATUS,C | |
| 365 rlcf C4+0 | |
| 366 clrf C4+1 | |
| 367 btfsc W4+1,7 | |
| 368 bsf C4+1,0 | |
| 369 | |
| 370 ; calculate C5 (16Bit) | |
| 371 movff W3+0,C5+0 | |
| 372 bcf C5+0,6 | |
| 373 btfsc W2+0,0 | |
| 374 bsf C5+0,6 | |
| 375 bcf C5+0,7 | |
| 376 btfsc W2+0,1 | |
| 377 bsf C5+0,7 | |
| 378 clrf C5+1 | |
| 379 btfsc W2+0,2 | |
| 380 bsf C5+1,0 | |
| 381 btfsc W2+0,3 | |
| 382 bsf C5+1,1 | |
| 383 btfsc W2+0,4 | |
| 384 bsf C5+1,2 | |
| 385 btfsc W2+0,5 | |
| 386 bsf C5+1,3 | |
| 387 | |
| 388 ; calculate C6 (16Bit) | |
| 389 clrf C6+1 | |
| 390 movff W4+0,C6+0 | |
| 391 bcf C6+0,7 | |
| 392 | |
| 393 bcf no_sensor_int ; enable sensor interrupts | |
| 394 return | |
| 395 | |
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396 ;============================================================================= |
| 0 | 397 reset_MS5535A_one: |
| 398 bsf sensor_SDO | |
| 399 nop | |
| 400 bsf sensor_CLK | |
| 401 nop | |
| 402 nop | |
| 403 nop | |
| 404 nop | |
| 405 nop | |
| 406 nop | |
| 407 bcf sensor_CLK | |
| 408 return | |
| 409 | |
| 410 reset_MS5535A_zero: | |
| 411 bcf sensor_SDO | |
| 412 nop | |
| 413 bsf sensor_CLK | |
| 414 nop | |
| 415 nop | |
| 416 nop | |
| 417 nop | |
| 418 nop | |
| 419 nop | |
| 420 bcf sensor_CLK | |
| 421 return | |
| 422 | |
| 423 reset_MS5535A: | |
| 424 rcall reset_MS5535A_one ;0 | |
| 425 rcall reset_MS5535A_zero | |
| 426 rcall reset_MS5535A_one | |
| 427 rcall reset_MS5535A_zero | |
| 428 rcall reset_MS5535A_one | |
| 429 rcall reset_MS5535A_zero | |
| 430 rcall reset_MS5535A_one | |
| 431 rcall reset_MS5535A_zero | |
| 432 rcall reset_MS5535A_one | |
| 433 rcall reset_MS5535A_zero | |
| 434 rcall reset_MS5535A_one | |
| 435 rcall reset_MS5535A_zero | |
| 436 rcall reset_MS5535A_one | |
| 437 rcall reset_MS5535A_zero | |
| 438 rcall reset_MS5535A_one | |
| 439 rcall reset_MS5535A_zero ;15 | |
| 440 rcall reset_MS5535A_zero | |
| 441 rcall reset_MS5535A_zero | |
| 442 rcall reset_MS5535A_zero | |
| 443 rcall reset_MS5535A_zero | |
| 444 rcall reset_MS5535A_zero ;20 | |
| 445 return | |
| 446 | |
| 447 get_2bytes_MS5535A: | |
| 448 movlw d'8' | |
| 449 movwf clock_count | |
| 450 rcall recieve_loop | |
| 451 movff isr1_temp,dMSB | |
| 452 | |
| 453 movlw d'8' | |
| 454 movwf clock_count | |
| 455 rcall recieve_loop | |
| 456 movff isr1_temp,dLSB | |
| 457 bsf sensor_CLK | |
| 458 nop | |
| 459 nop | |
| 460 nop | |
| 461 nop | |
| 462 nop | |
| 463 nop | |
| 464 bcf sensor_CLK | |
| 465 return | |
| 466 | |
| 467 recieve_loop: | |
| 468 bsf sensor_CLK | |
| 469 nop | |
| 470 nop | |
| 471 nop | |
| 472 nop | |
| 473 nop | |
| 474 nop | |
| 475 bcf sensor_CLK | |
| 476 btfss sensor_SDI ;MSB first | |
| 477 bcf STATUS,C | |
| 478 btfsc sensor_SDI ;MSB first | |
| 479 bsf STATUS,C | |
| 480 rlcf isr1_temp,F | |
| 481 decfsz clock_count,F | |
| 482 bra recieve_loop | |
| 483 return | |
| 484 | |
| 485 send_data_MS55535A: | |
| 486 ; send three startbits first | |
| 487 bcf sensor_CLK | |
| 488 bsf sensor_SDO | |
| 489 movlw d'3' | |
| 490 subwf clock_count,F ; total bit counter | |
| 491 bsf sensor_CLK | |
| 492 nop | |
| 493 nop | |
| 494 nop | |
| 495 nop | |
| 496 nop | |
| 497 nop | |
| 498 bcf sensor_CLK | |
| 499 nop | |
| 500 nop | |
| 501 nop | |
| 502 nop | |
| 503 nop | |
| 504 nop | |
| 505 bsf sensor_CLK | |
| 506 nop | |
| 507 nop | |
| 508 nop | |
| 509 nop | |
| 510 nop | |
| 511 nop | |
| 512 bcf sensor_CLK | |
| 513 nop | |
| 514 nop | |
| 515 nop | |
| 516 nop | |
| 517 nop | |
| 518 nop | |
| 519 bsf sensor_CLK | |
| 520 nop | |
| 521 nop | |
| 522 nop | |
| 523 nop | |
| 524 nop | |
| 525 nop | |
| 526 bcf sensor_CLK | |
| 527 ; now send 8 bytes from isr_temp1 and fill-up with zeros | |
| 528 datenbits: | |
| 529 btfss isr1_temp,7 ;MSB first | |
| 530 bcf sensor_SDO | |
| 531 btfsc isr1_temp,7 ;MSB first | |
| 532 bsf sensor_SDO | |
| 533 bcf STATUS,C | |
| 534 rlcf isr1_temp | |
| 535 | |
| 536 bsf sensor_CLK | |
| 537 nop | |
| 538 nop | |
| 539 nop | |
| 540 nop | |
| 541 nop | |
| 542 nop | |
| 543 bcf sensor_CLK | |
| 544 | |
| 545 decfsz clock_count,F | |
| 546 bra datenbits | |
| 547 return |