1 ###############################################################################
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3 # IAR Atmel AVR C/C++ Compiler V4.30F/W32 13/Mar/2008 04:49:35 #
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4 # Copyright 1996-2007 IAR Systems. All rights reserved. #
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6 # Source file = C:\home\kevin\pub\src\bc100\IAR\ADC.c #
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7 # Command line = C:\home\kevin\pub\src\bc100\IAR\ADC.c #
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8 # --cpu=tiny861 -ms -o C:\home\kevin\pub\src\bc10 #
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9 # 0\IAR\Release\Obj\ -D NDEBUG -lCN #
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10 # C:\home\kevin\pub\src\bc100\IAR\Release\List\ #
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11 # -lB C:\home\kevin\pub\src\bc100\IAR\Release\Lis #
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12 # t\ --initializers_in_flash -s9 --no_cross_call #
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13 # --no_tbaa -DENABLE_BIT_DEFINITIONS -e -I #
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14 # "C:\Program Files\IAR Systems\Embedded #
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15 # Workbench 4.0\avr\INC\" -I "C:\Program #
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16 # Files\IAR Systems\Embedded Workbench #
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17 # 4.0\avr\INC\CLIB\" --eeprom_size 512 #
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18 # --misrac=5-9,11-12,14,16-17,19-21,24-26,29-32, #
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19 # 34-35,38-39,42-43,46,50,52-54,56-59,61-62, #
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20 # 64-65,68-80,83-84,87-91,94-95,98-100,103-110, #
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22 # Enabled MISRA C rules = 5-9,11-12,14,16-17,19-21,24-26,29-32,34-35, #
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23 # 38-39,42-43,46,50,52-54,56-59,61-62,64-65, #
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24 # 68-80,83-84,87-91,94-95,98-100,103-110,112-126 #
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25 # Checked = 5,7-9,11-12,14,17,19-21,24,29-32,34-35,38-39, #
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26 # 42,46,50,52-54,56-59,61-62,64,68-69,71-80, #
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27 # 83-84,87-89,91,94-95,98,100,104-105,108-109, #
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29 # Not checked = 6,16,25-26,43,65,70,90,99,103,106-107,110, #
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31 # List file = C:\home\kevin\pub\src\bc100\IAR\Release\List\AD #
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33 # Object file = C:\home\kevin\pub\src\bc100\IAR\Release\Obj\ADC #
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37 ###############################################################################
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39 C:\home\kevin\pub\src\bc100\IAR\ADC.c
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40 1 /* This file has been prepared for Doxygen automatic documentation generation.*/
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41 2 /*! \file *********************************************************************
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44 5 * Functions for use of ADC
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46 7 * Contains high level functions for initializing the ADC, interrupt
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47 8 * handling, and treatment of samples.\n
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48 9 * The ADC is set to free running mode and uses an external reference
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50 11 * To make all sampling take at least 25 clock cycles the ADC is stopped
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51 12 * and restarted by the ISR.
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53 14 * \par Application note:
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54 15 * AVR458: Charging Li-Ion Batteries with BC100 \n
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55 16 * AVR463: Charging NiMH Batteries with BC100
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57 18 * \par Documentation:
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58 19 * For comprehensive code documentation, supported compilers, compiler
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59 20 * settings and supported devices see readme.html
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62 23 * Atmel Corporation: http://www.atmel.com \n
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63 24 * Support email: avr@atmel.com \n
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64 25 * Original author: \n
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67 28 * $Revision: 2299 $
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69 30 * $URL: http://svn.norway.atmel.com/AppsAVR8/avr458_Charging_Li-Ion_Batteries_with_BC100/tag/20070904_release_1.0/code/IAR/ADC.c $
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70 31 * $Date: 2007-08-23 12:55:51 +0200 (to, 23 aug 2007) $\n
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71 32 ******************************************************************************/
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73 34 #include <ioavr.h>
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75 \ In segment ABSOLUTE, at 0x3b
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76 \ <unnamed> volatile __io _A_PORTA
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80 \ In segment ABSOLUTE, at 0x3a
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81 \ <unnamed> volatile __io _A_DDRA
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85 \ In segment ABSOLUTE, at 0x27
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86 \ <unnamed> volatile __io _A_ADMUX
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90 \ In segment ABSOLUTE, at 0x26
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91 \ <unnamed> volatile __io _A_ADCSRA
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95 \ In segment ABSOLUTE, at 0x24
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96 \ <unnamed> volatile __io _A_ADC
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100 \ In segment ABSOLUTE, at 0x23
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101 \ <unnamed> volatile __io _A_ADCSRB
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104 35 #include <inavr.h>
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106 37 #include "structs.h"
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108 39 #include "main.h"
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109 40 #include "ADC.h"
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112 43 //******************************************************************************
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114 45 //******************************************************************************
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115 46 // ADC status struct.
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116 47 //! \brief Holds sampled data and ADC-status
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117 48 ADC_Status_t ADCS;
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120 51 /*! \brief Indicates maximum battery voltage.
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122 53 * This variable is stored in EEPROM and indicates how much the battery voltage
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123 54 * is downscaled by HW before it is sampled. The amount of downscaling depends
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124 55 * on the maximum battery voltage, and is necessary to avoid saturation of the
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125 56 * ADC (reference voltage is 2.5 V).
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127 58 * \note Used by the ADC ISR when calling ScaleU() and ScaleI().
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129 60 * \note Defaults to 1, which means 10 V max battery voltage.
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131 62 * \note Table of settings:
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133 64 * VBAT_RANGE | Max battery voltage | Jumper setting
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137 68 * 3 | 30V | 1/12
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138 69 * 4 | 40V | 1/16
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141 72 // Maximum battery voltage (affects scaling of samples).
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143 \ In segment EEPROM_I, align 1, keep-with-next
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144 73 __eeprom unsigned char VBAT_RANGE = 1;
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149 76 //******************************************************************************
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151 78 //******************************************************************************
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152 79 /*! \brief Interrupt Service routine for ADC.
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154 81 * This ISR stores the sampled values in the ADC status-struct, then
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155 82 * updates the ADC MUX to the next channel in the scanning-sequence.\n
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156 83 * Once the sequence is completed, ADCS.Flag is set and unless
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157 84 * ADCS.Halt has been set, the sequence starts over. Otherwise, the ADC
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158 85 * is disabled.\n
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159 86 * If the mains voltage is below minimum, ADCS.Mains gets set to FALSE.
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161 88 * \note Table of scanning sequence:
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163 90 * Seq | MUX | pos I/P | neg I/P | gain | measure | signed
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164 91 * ----+--------+----------+----------+------+---------+-------
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165 92 * 01 | 000001 | ADC1/PA1 | n/a | 1x | NTC | no
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166 93 * 02 | 000010 | ADC2/PA2 | n/a | 1x | RID | no
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167 94 * 03 | 000011 | ADC3/PA4 | n/a | 1x | VIN- | no
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168 95 * 04 | 000100 | ADC4/PA5 | n/a | 1x | VIN+ | no
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169 96 * 05 | 000101 | ADC5/PA6 | n/a | 1x | VBAT- | no
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170 97 * 06 | 000110 | ADC6/PA7 | n/a | 1x | VBAT+ | no
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171 98 * 07 | 010010 | ADC4/PA5 | ADC3/PA4 | 20x | IIN | no
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172 99 * 08 | 010111 | ADC6/PA7 | ADC5/PA6 | 20x | IBAT | yes
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175 102 * \todo IIN (#7 in sequence) is never used.
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177 104 * \todo Signed is never set. Signed measurements of IBAT will halve the
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178 105 * measuring sensitivity, and is therefore not favourable. At the moment,
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179 106 * great currents (f.ex. if something happens with the battery) will be
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180 107 * interpreted as negative, which might cause unfavourable behaviour during
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181 108 * charging (depending on what PWM behaviour is defined), f.ex.
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182 109 * ConstantCurrent() will keep increasing the PWM output. This results in an
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183 110 * PWM controller error being flagged and the program going into
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184 111 * error-state and eventually reinitializing.
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186 113 #pragma vector=ADC_vect
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188 \ In segment CODE, align 2, keep-with-next
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189 114 __interrupt void ADC_ISR(void)
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192 \ 00000000 924A ST -Y, R4
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193 \ 00000002 93BA ST -Y, R27
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194 \ 00000004 93AA ST -Y, R26
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195 \ 00000006 939A ST -Y, R25
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196 \ 00000008 938A ST -Y, R24
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197 \ 0000000A 93FA ST -Y, R31
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198 \ 0000000C 93EA ST -Y, R30
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199 \ 0000000E 923A ST -Y, R3
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200 \ 00000010 922A ST -Y, R2
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201 \ 00000012 921A ST -Y, R1
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202 \ 00000014 920A ST -Y, R0
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203 \ 00000016 937A ST -Y, R23
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204 \ 00000018 936A ST -Y, R22
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205 \ 0000001A 935A ST -Y, R21
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206 \ 0000001C 934A ST -Y, R20
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207 \ 0000001E 933A ST -Y, R19
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208 \ 00000020 932A ST -Y, R18
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209 \ 00000022 931A ST -Y, R17
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210 \ 00000024 930A ST -Y, R16
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211 \ 00000026 B64F IN R4, 0x3F
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212 \ 00000028 REQUIRE ?Register_R4_is_cg_reg
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213 116 static unsigned char avgIndex = 0;
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214 117 unsigned char i, Next, Signed;
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215 118 signed int temp = 0;
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216 \ 00000028 E080 LDI R24, 0
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217 \ 0000002A E090 LDI R25, 0
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219 120 Signed = FALSE; // Presume next conversion is unipolar.
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220 121 ADCSRA &= ~(1<<ADEN); // Stop conversion before handling. This makes all
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221 \ 0000002C 9837 CBI 0x06, 0x07
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222 122 // conversions take at least 25 ADCCLK. (It is restarted later)
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224 124 // Handle the conversion, depending on what channel it is from, then
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225 125 // switch to the next channel in the sequence.
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226 126 switch (ADCS.MUX){
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227 \ 0000002E .... LDI R26, LOW(ADCS)
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228 \ 00000030 .... LDI R27, (ADCS) >> 8
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229 \ 00000032 910C LD R16, X
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230 \ 00000034 710F ANDI R16, 0x1F
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231 \ 00000036 950A DEC R16
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232 \ 00000038 F049 BREQ ??ADC_ISR_0
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233 \ 0000003A 950A DEC R16
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234 \ 0000003C F071 BREQ ??ADC_ISR_1
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235 \ 0000003E 950A DEC R16
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236 \ 00000040 F099 BREQ ??ADC_ISR_2
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237 \ 00000042 5002 SUBI R16, 2
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238 \ 00000044 F111 BREQ ??ADC_ISR_3
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239 \ 00000046 5102 SUBI R16, 18
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240 \ 00000048 F181 BREQ ??ADC_ISR_4
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241 \ 0000004A C07E RJMP ??ADC_ISR_5
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242 127 // MUX = 0b000001 => ADC1 (PA1) = NTC
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244 129 ADCS.rawNTC = ADC;
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246 \ 0000004C B104 IN R16, 0x04
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247 \ 0000004E B115 IN R17, 0x05
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248 \ 00000050 01FD MOVW R31:R30, R27:R26
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249 \ 00000052 8304 STD Z+4, R16
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250 \ 00000054 8315 STD Z+5, R17
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252 \ 00000056 E002 LDI R16, 2
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253 \ 00000058 C078 RJMP ??ADC_ISR_6
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257 134 // MUX = 0b000010 => ADC2 (PA2) = RID
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259 136 ADCS.rawRID = ADC;
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261 \ 0000005A B104 IN R16, 0x04
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262 \ 0000005C B115 IN R17, 0x05
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263 \ 0000005E 01FD MOVW R31:R30, R27:R26
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264 \ 00000060 8302 STD Z+2, R16
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265 \ 00000062 8313 STD Z+3, R17
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267 \ 00000064 E003 LDI R16, 3
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268 \ 00000066 C071 RJMP ??ADC_ISR_6
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272 141 // MUX = 0b000011 => ADC3 (PA4) = VIN-
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274 143 // Supply voltage is always divided by 16.
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275 144 ADCS.VIN = ScaleU(4, (unsigned int)ADC); // Cast because ADC is short.
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277 \ 00000068 B124 IN R18, 0x04
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278 \ 0000006A B135 IN R19, 0x05
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279 \ 0000006C E004 LDI R16, 4
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280 \ 0000006E .... RCALL ScaleU
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281 \ 00000070 01FD MOVW R31:R30, R27:R26
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282 \ 00000072 8700 STD Z+8, R16
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283 \ 00000074 8711 STD Z+9, R17
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285 146 // Is mains failing?
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286 147 if (ADCS.VIN < VIN_MIN) {
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287 \ 00000076 3300 CPI R16, 48
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288 \ 00000078 4111 SBCI R17, 17
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289 \ 0000007A 910C LD R16, X
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290 \ 0000007C F410 BRCC ??ADC_ISR_7
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291 148 ADCS.Mains = FALSE;
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292 \ 0000007E 7B0F ANDI R16, 0xBF
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293 \ 00000080 C001 RJMP ??ADC_ISR_8
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295 150 ADCS.Mains = TRUE;
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297 \ 00000082 6400 ORI R16, 0x40
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299 \ 00000084 930C ST X, R16
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303 \ 00000086 E005 LDI R16, 5
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304 \ 00000088 C060 RJMP ??ADC_ISR_6
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308 157 // MUX = 0b000101 => ADC5 (PA6) = VBAT-
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310 159 ADCS.rawVBAT = ADC;
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312 \ 0000008A B104 IN R16, 0x04
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313 \ 0000008C B115 IN R17, 0x05
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314 \ 0000008E 01FD MOVW R31:R30, R27:R26
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315 \ 00000090 8306 STD Z+6, R16
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316 \ 00000092 8317 STD Z+7, R17
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318 161 // Scale voltage according to jumper setting.
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319 162 ADCS.VBAT = ScaleU(VBAT_RANGE, (unsigned int)ADC); // ADC is a short.
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320 \ 00000094 B124 IN R18, 0x04
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321 \ 00000096 B135 IN R19, 0x05
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322 \ 00000098 .... LDI R20, LOW(VBAT_RANGE)
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323 \ 0000009A .... LDI R21, (VBAT_RANGE) >> 8
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324 \ 0000009C .... RCALL __eeget8_16
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325 \ 0000009E .... RCALL ScaleU
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326 \ 000000A0 01FD MOVW R31:R30, R27:R26
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327 \ 000000A2 8702 STD Z+10, R16
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328 \ 000000A4 8713 STD Z+11, R17
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330 \ 000000A6 E107 LDI R16, 23
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331 \ 000000A8 C050 RJMP ??ADC_ISR_6
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332 164 // Signed = TRUE; // Next conversion is bipolar. Halves sensitivity!
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336 168 case 0x17: // MUX = 0b010111 => 20 x [ADC6(PA7) - ADC5(PA6)] = IBAT
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337 169 // If bipolar, from -512 to 0, to 511:
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338 170 // 0x200 ... 0x3ff, 0x000, 0x001 ... 0x1FF
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340 172 // Scale sample according to jumper setting, handle negative numbers.
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341 173 if (ADC > 511) {
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343 \ 000000AA B104 IN R16, 0x04
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344 \ 000000AC B115 IN R17, 0x05
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345 \ 000000AE 3012 CPI R17, 2
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346 \ 000000B0 F0C0 BRCS ??ADC_ISR_9
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347 174 ADCS.IBAT = -(signed int)ScaleI(VBAT_RANGE,
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348 175 (1024 - (ADC-ADCS.ADC5_G20_OS)));
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349 \ 000000B2 E000 LDI R16, 0
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350 \ 000000B4 E014 LDI R17, 4
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351 \ 000000B6 B124 IN R18, 0x04
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352 \ 000000B8 B135 IN R19, 0x05
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353 \ 000000BA 1B02 SUB R16, R18
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354 \ 000000BC 0B13 SBC R17, R19
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355 \ 000000BE 01FD MOVW R31:R30, R27:R26
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356 \ 000000C0 8121 LDD R18, Z+1
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357 \ 000000C2 9522 SWAP R18
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358 \ 000000C4 702F ANDI R18, 0x0F
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359 \ 000000C6 E030 LDI R19, 0
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360 \ 000000C8 0F20 ADD R18, R16
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361 \ 000000CA 1F31 ADC R19, R17
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362 \ 000000CC .... LDI R20, LOW(VBAT_RANGE)
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363 \ 000000CE .... LDI R21, (VBAT_RANGE) >> 8
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364 \ 000000D0 .... RCALL __eeget8_16
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365 \ 000000D2 .... RCALL ScaleI
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366 \ 000000D4 9511 NEG R17
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367 \ 000000D6 9501 NEG R16
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368 \ 000000D8 4010 SBCI R17, 0
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370 \ 000000DA 01FD MOVW R31:R30, R27:R26
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371 \ 000000DC 8704 STD Z+12, R16
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372 \ 000000DE 8715 STD Z+13, R17
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373 \ 000000E0 C014 RJMP ??ADC_ISR_11
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374 176 } else if (ADC > 0) {
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376 \ 000000E2 B104 IN R16, 0x04
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377 \ 000000E4 B115 IN R17, 0x05
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378 \ 000000E6 2B01 OR R16, R17
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379 \ 000000E8 F069 BREQ ??ADC_ISR_12
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380 177 ADCS.IBAT = ScaleI(VBAT_RANGE, (ADC-ADCS.ADC5_G20_OS));
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381 \ 000000EA B124 IN R18, 0x04
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382 \ 000000EC B135 IN R19, 0x05
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383 \ 000000EE 01FD MOVW R31:R30, R27:R26
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384 \ 000000F0 8101 LDD R16, Z+1
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385 \ 000000F2 9502 SWAP R16
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386 \ 000000F4 700F ANDI R16, 0x0F
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387 \ 000000F6 1B20 SUB R18, R16
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388 \ 000000F8 4030 SBCI R19, 0
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389 \ 000000FA .... LDI R20, LOW(VBAT_RANGE)
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390 \ 000000FC .... LDI R21, (VBAT_RANGE) >> 8
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391 \ 000000FE .... RCALL __eeget8_16
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392 \ 00000100 .... RCALL ScaleI
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393 \ 00000102 CFEB RJMP ??ADC_ISR_10
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397 \ 00000104 01FD MOVW R31:R30, R27:R26
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398 \ 00000106 8784 STD Z+12, R24
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399 \ 00000108 8785 STD Z+13, R24
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402 182 // Insert sample of battery current into the averaging-array
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403 183 // (overwriting the oldest sample), then recalculate and store the
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404 184 // average. This is the last conversion in the sequence, so
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405 185 // flag a complete ADC-cycle and restart sequence.
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406 186 ADCS.discIBAT[(avgIndex++ & 0x03)] = ADCS.IBAT;
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408 \ 0000010A 8524 LDD R18, Z+12
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409 \ 0000010C 8535 LDD R19, Z+13
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410 \ 0000010E 8D00 LDD R16, Z+24
\r
411 \ 00000110 7003 ANDI R16, 0x03
\r
412 \ 00000112 0F00 LSL R16
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413 \ 00000114 0FE0 ADD R30, R16
\r
414 \ 00000116 1FF8 ADC R31, R24
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415 \ 00000118 8726 STD Z+14, R18
\r
416 \ 0000011A 8737 STD Z+15, R19
\r
417 \ 0000011C 01FD MOVW R31:R30, R27:R26
\r
418 \ 0000011E 8D00 LDD R16, Z+24
\r
419 \ 00000120 9503 INC R16
\r
420 \ 00000122 8F00 STD Z+24, R16
\r
421 187 for (i = 0; i < 4 ; i++) {
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422 \ 00000124 963E ADIW R31:R30, 14
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423 \ 00000126 E004 LDI R16, 4
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424 188 temp += ADCS.discIBAT[i];
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426 \ 00000128 9121 LD R18, Z+
\r
427 \ 0000012A 9131 LD R19, Z+
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428 \ 0000012C 0F82 ADD R24, R18
\r
429 \ 0000012E 1F93 ADC R25, R19
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431 \ 00000130 950A DEC R16
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432 \ 00000132 F7D1 BRNE ??ADC_ISR_13
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434 191 ADCS.avgIBAT = (temp / 4);
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435 \ 00000134 018C MOVW R17:R16, R25:R24
\r
436 \ 00000136 E044 LDI R20, 4
\r
437 \ 00000138 E050 LDI R21, 0
\r
438 \ 0000013A .... RCALL ?SS_DIVMOD_L02
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439 \ 0000013C 01FD MOVW R31:R30, R27:R26
\r
440 \ 0000013E 8B06 STD Z+22, R16
\r
441 \ 00000140 8B17 STD Z+23, R17
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443 193 ADCS.Flag = TRUE;
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444 \ 00000142 910C LD R16, X
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445 \ 00000144 6200 ORI R16, 0x20
\r
446 \ 00000146 930C ST X, R16
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448 195 Signed = FALSE; // This is the only bipolar conversion.
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452 199 default: // Should not happen. (Invalid MUX-channel)
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453 200 Next=0x01; // Start at the beginning of sequence.
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455 \ 00000148 E001 LDI R16, 1
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459 204 // Update MUX to next channel in sequence, set a bipolar conversion if
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460 205 // this has been flagged.
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461 206 ADCS.MUX = Next;
\r
463 \ 0000014A 911C LD R17, X
\r
464 \ 0000014C 7E10 ANDI R17, 0xE0
\r
465 \ 0000014E 710F ANDI R16, 0x1F
\r
466 \ 00000150 2B01 OR R16, R17
\r
467 \ 00000152 930C ST X, R16
\r
468 207 ADMUX = (1<<REFS0) + ADCS.MUX;
\r
469 \ 00000154 710F ANDI R16, 0x1F
\r
470 \ 00000156 5C00 SUBI R16, 192
\r
471 \ 00000158 B907 OUT 0x07, R16
\r
474 210 ADCSRB |= (1<<BIN);
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476 212 ADCSRB &= ~(1<<BIN);
\r
477 \ 0000015A 981F CBI 0x03, 0x07
\r
480 215 // Re-enable the ADC unless a halt has been flagged and a conversion
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481 216 // cycle has completed.
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482 217 if (!((ADCS.Halt) && (ADCS.Flag))) {
\r
483 \ 0000015C 910C LD R16, X
\r
484 \ 0000015E 7A00 ANDI R16, 0xA0
\r
485 \ 00000160 3A00 CPI R16, 160
\r
486 \ 00000162 F019 BREQ ??ADC_ISR_14
\r
487 218 ADCSRA |= (1<<ADEN)|(1<<ADSC);
\r
488 \ 00000164 B106 IN R16, 0x06
\r
489 \ 00000166 6C00 ORI R16, 0xC0
\r
490 \ 00000168 B906 OUT 0x06, R16
\r
494 \ 0000016A BE4F OUT 0x3F, R4
\r
495 \ 0000016C 9109 LD R16, Y+
\r
496 \ 0000016E 9119 LD R17, Y+
\r
497 \ 00000170 9129 LD R18, Y+
\r
498 \ 00000172 9139 LD R19, Y+
\r
499 \ 00000174 9149 LD R20, Y+
\r
500 \ 00000176 9159 LD R21, Y+
\r
501 \ 00000178 9169 LD R22, Y+
\r
502 \ 0000017A 9179 LD R23, Y+
\r
503 \ 0000017C 9009 LD R0, Y+
\r
504 \ 0000017E 9019 LD R1, Y+
\r
505 \ 00000180 9029 LD R2, Y+
\r
506 \ 00000182 9039 LD R3, Y+
\r
507 \ 00000184 91E9 LD R30, Y+
\r
508 \ 00000186 91F9 LD R31, Y+
\r
509 \ 00000188 9189 LD R24, Y+
\r
510 \ 0000018A 9199 LD R25, Y+
\r
511 \ 0000018C 91A9 LD R26, Y+
\r
512 \ 0000018E 91B9 LD R27, Y+
\r
513 \ 00000190 9049 LD R4, Y+
\r
514 \ 00000192 9518 RETI
\r
515 \ 00000194 REQUIRE _A_ADMUX
\r
516 \ 00000194 REQUIRE _A_ADCSRA
\r
517 \ 00000194 REQUIRE _A_ADC
\r
518 \ 00000194 REQUIRE _A_ADCSRB
\r
520 \ In segment NEAR_Z, align 1, keep-with-next
\r
521 \ 00000000 REQUIRE `?<Segment init: NEAR_Z>`
\r
527 223 /*! \brief Scales sample to represent "actual voltage" in mV.
\r
529 225 * This function returns the actual sampled voltage, scaled according
\r
530 226 * to the jumper settings.
\r
532 228 * \param setting Indicates what downscaling was used.
\r
533 229 * \param data The sampled value.
\r
535 231 * \note Table for setting-parameter:\n
\r
537 233 * Presume VREF = 2.5V and Gain = 1x.
\r
538 234 * => Resolution @ 1/1 = 2.5V / 1024 = 2.4414 mV/LSB
\r
539 235 * setting | source | R1 | R2/(R1+R2) | UADC(LSB) | U(MAX)
\r
540 236 * --------+--------+------+------------+-----------+-------
\r
541 237 * N/A | | - | - | 2.441mV | 2.50V
\r
542 238 * 0 | VBAT | 10k | 1/2 | 4.883mV | 5.00V
\r
543 239 * 1 | VBAT | 30k | 1/4 | 9.766mV | 9.99V
\r
544 240 * 2 | VBAT | 70k | 1/8 | 19.53mV | 19.98V
\r
545 241 * 3 | VBAT | 110k | 1/12 | 29.30mV | 29.97V
\r
546 242 * 4 | VBAT | 150k | 1/16 | 39.06mV | 39.96V
\r
547 243 * 4 | VIN | 150k | 1/16 | 39.06mV | 39.96V
\r
551 \ In segment CODE, align 2, keep-with-next
\r
552 246 unsigned int ScaleU(unsigned char setting, unsigned int data)
\r
555 \ 00000000 2E2A MOV R2, R26
\r
556 \ 00000002 01BC MOVW R23:R22, R25:R24
\r
557 \ 00000004 2FA0 MOV R26, R16
\r
558 \ 00000006 01C9 MOVW R25:R24, R19:R18
\r
559 248 // Temporary variable needed.
\r
560 249 unsigned int scaled = 0;
\r
562 251 // Jumper setting 3: mV/LSB = 29.30 ~= 29 + 1/4 + 1/16
\r
563 252 if (setting == 3) {
\r
564 \ 00000008 3003 CPI R16, 3
\r
565 \ 0000000A 01A9 MOVW R21:R20, R19:R18
\r
566 \ 0000000C F4A1 BRNE ??ScaleU_0
\r
567 253 scaled = 29 * data;
\r
568 254 scaled += (data >> 2);
\r
569 255 scaled += (data >> 4);
\r
570 \ 0000000E E10D LDI R16, 29
\r
571 \ 00000010 E010 LDI R17, 0
\r
572 \ 00000012 .... RCALL ?S_MUL_L02
\r
573 \ 00000014 9536 LSR R19
\r
574 \ 00000016 9527 ROR R18
\r
575 \ 00000018 9536 LSR R19
\r
576 \ 0000001A 9527 ROR R18
\r
577 \ 0000001C 0D20 ADD R18, R0
\r
578 \ 0000001E 1D31 ADC R19, R1
\r
579 \ 00000020 9596 LSR R25
\r
580 \ 00000022 9587 ROR R24
\r
581 \ 00000024 9596 LSR R25
\r
582 \ 00000026 9587 ROR R24
\r
583 \ 00000028 9596 LSR R25
\r
584 \ 0000002A 9587 ROR R24
\r
585 \ 0000002C 9596 LSR R25
\r
586 \ 0000002E 9587 ROR R24
\r
587 \ 00000030 0F82 ADD R24, R18
\r
588 \ 00000032 1F93 ADC R25, R19
\r
589 \ 00000034 C014 RJMP ??ScaleU_1
\r
591 257 // Jumper setting 4: mV/LSB = 39.06 ~= 39 + 1/16
\r
592 258 scaled = 39 * data;
\r
593 259 scaled += (data >> 4);
\r
595 \ 00000036 E207 LDI R16, 39
\r
596 \ 00000038 E010 LDI R17, 0
\r
597 \ 0000003A .... RCALL ?S_MUL_L02
\r
598 \ 0000003C 9596 LSR R25
\r
599 \ 0000003E 9587 ROR R24
\r
600 \ 00000040 9596 LSR R25
\r
601 \ 00000042 9587 ROR R24
\r
602 \ 00000044 9596 LSR R25
\r
603 \ 00000046 9587 ROR R24
\r
604 \ 00000048 9596 LSR R25
\r
605 \ 0000004A 9587 ROR R24
\r
606 \ 0000004C 0D80 ADD R24, R0
\r
607 \ 0000004E 1D91 ADC R25, R1
\r
609 261 if (setting <3) {
\r
610 \ 00000050 30A3 CPI R26, 3
\r
611 \ 00000052 F428 BRCC ??ScaleU_1
\r
612 262 // Jumper setting 0: mV/LSB = 4.883 = 39.06 / 8
\r
613 263 // 1: mV/LSB = 9.766 = 39.06 / 4
\r
614 264 // 2: mV/LSB = 19.53 = 39.06 / 2
\r
615 265 scaled = (scaled >> (3-setting));
\r
616 \ 00000054 018C MOVW R17:R16, R25:R24
\r
617 \ 00000056 E043 LDI R20, 3
\r
618 \ 00000058 1B4A SUB R20, R26
\r
619 \ 0000005A .... RCALL ?US_SHR_L02
\r
620 \ 0000005C 01C8 MOVW R25:R24, R17:R16
\r
624 269 return(scaled);
\r
626 \ 0000005E 018C MOVW R17:R16, R25:R24
\r
627 \ 00000060 01CB MOVW R25:R24, R23:R22
\r
628 \ 00000062 2DA2 MOV R26, R2
\r
629 \ 00000064 9508 RET
\r
633 273 /*! \brief Scales sample to represent "actual current" in mA.
\r
635 275 * This function returns the actual sampled current, scaled according
\r
636 276 * to the jumper settings.
\r
638 278 * \param setting Indicates what downscaling was used.
\r
639 279 * \param data The sampled value.
\r
641 281 * \note Table for setting-parameter:\n
\r
643 283 * Presume VREF = 2.5V and Gain = 1x or 20x.
\r
644 284 * => Resolution(U) @ (1/1 and 20x) = 2.5V / (GAIN x 1024) = 0.1221 mV/LSB
\r
645 285 * => Resolution(I) = Resolution(U) / Rshunt = Resolution(U) / 0.07
\r
646 286 * Setting | R1 | R2/(R1+R2) | U(LSB) | I(LSB) | I(MAX) | Gain
\r
647 287 * --------+------+------------+----------+----------+--------+-----
\r
648 288 * N/A | - | - | 0.1221mV | 1.744mA | 1.78A | 20x
\r
649 289 * 0 | 10k | 1/2 | 0.2442mV | 3.489mA | 3.57A | 20x
\r
650 290 * 1 | 30k | 1/4 | 0.4884mV | 6.978mA | 7.14A | 20x
\r
651 291 * 2 | 70k | 1/8 | 0.9768mV | 13.955mA | 14.3A | 20x
\r
652 292 * 3 | 110k | 1/12 | 1.4652mV | 20.931mA | 21.4A | 20x
\r
653 293 * 4 | 150k | 1/16 | 1.9536mV | 27.909mA | 28.5A | 20x
\r
654 294 * 5 | 10k | 1/2 | 2.4414mV | 34.877mA | 35.7A | 1x
\r
658 \ In segment CODE, align 2, keep-with-next
\r
659 297 unsigned int ScaleI(unsigned char setting, unsigned int data)
\r
662 \ 00000000 2E2A MOV R2, R26
\r
663 \ 00000002 01BC MOVW R23:R22, R25:R24
\r
664 \ 00000004 2FA0 MOV R26, R16
\r
665 \ 00000006 01C9 MOVW R25:R24, R19:R18
\r
666 299 // Temporary variable needed.
\r
667 300 unsigned int scaled = 0;
\r
669 302 // Jumper setting 3: mA/LSB = 20.931mA ~= 21 - 1/16 + 1/128
\r
670 303 if (setting == 3) {
\r
671 \ 00000008 3003 CPI R16, 3
\r
672 \ 0000000A 01A9 MOVW R21:R20, R19:R18
\r
673 \ 0000000C F4A9 BRNE ??ScaleI_0
\r
674 304 scaled = 21 * data;
\r
675 305 scaled -= (data >> 4);
\r
676 306 scaled += (data >> 7);
\r
677 \ 0000000E E105 LDI R16, 21
\r
678 \ 00000010 E010 LDI R17, 0
\r
679 \ 00000012 .... RCALL ?S_MUL_L02
\r
680 \ 00000014 9536 LSR R19
\r
681 \ 00000016 9527 ROR R18
\r
682 \ 00000018 9536 LSR R19
\r
683 \ 0000001A 9527 ROR R18
\r
684 \ 0000001C 9536 LSR R19
\r
685 \ 0000001E 9527 ROR R18
\r
686 \ 00000020 9536 LSR R19
\r
687 \ 00000022 9527 ROR R18
\r
688 \ 00000024 1B02 SUB R16, R18
\r
689 \ 00000026 0B13 SBC R17, R19
\r
690 \ 00000028 0F88 LSL R24
\r
691 \ 0000002A 2F89 MOV R24, R25
\r
692 \ 0000002C 1F88 ROL R24
\r
693 \ 0000002E E090 LDI R25, 0
\r
694 \ 00000030 1F99 ROL R25
\r
695 \ 00000032 0F80 ADD R24, R16
\r
696 \ 00000034 1F91 ADC R25, R17
\r
697 \ 00000036 C01A RJMP ??ScaleI_1
\r
698 307 } else { // Jumper setting 4: mA/LSB = 27.909mA ~= 28 - 1/8 + 1/32
\r
699 308 scaled = 28 * data;
\r
700 309 scaled -= (data >> 3);
\r
701 310 scaled += (data >> 5);
\r
703 \ 00000038 E10C LDI R16, 28
\r
704 \ 0000003A E010 LDI R17, 0
\r
705 \ 0000003C .... RCALL ?S_MUL_L02
\r
706 \ 0000003E 0198 MOVW R19:R18, R17:R16
\r
707 \ 00000040 018C MOVW R17:R16, R25:R24
\r
708 \ 00000042 9516 LSR R17
\r
709 \ 00000044 9507 ROR R16
\r
710 \ 00000046 9516 LSR R17
\r
711 \ 00000048 9507 ROR R16
\r
712 \ 0000004A 9516 LSR R17
\r
713 \ 0000004C 9507 ROR R16
\r
714 \ 0000004E 1B20 SUB R18, R16
\r
715 \ 00000050 0B31 SBC R19, R17
\r
716 \ 00000052 018C MOVW R17:R16, R25:R24
\r
717 \ 00000054 E045 LDI R20, 5
\r
718 \ 00000056 .... RCALL ?US_SHR_L02
\r
719 \ 00000058 01C8 MOVW R25:R24, R17:R16
\r
720 \ 0000005A 0F82 ADD R24, R18
\r
721 \ 0000005C 1F93 ADC R25, R19
\r
723 312 if (setting <3) {
\r
724 \ 0000005E 30A3 CPI R26, 3
\r
725 \ 00000060 F428 BRCC ??ScaleI_1
\r
726 313 // Jumper setting 0: mA/LSB = 3.489mA = 27.909 / 8
\r
727 314 // 1: mA/LSB = 6.978mA = 27.909 / 4
\r
728 315 // 2: mA/LSB = 13.955mA = 27.909 / 2
\r
729 316 scaled = (scaled >> (3-setting));
\r
730 \ 00000062 018C MOVW R17:R16, R25:R24
\r
731 \ 00000064 E043 LDI R20, 3
\r
732 \ 00000066 1B4A SUB R20, R26
\r
733 \ 00000068 .... RCALL ?US_SHR_L02
\r
734 \ 0000006A 01C8 MOVW R25:R24, R17:R16
\r
738 320 return(scaled);
\r
740 \ 0000006C 018C MOVW R17:R16, R25:R24
\r
741 \ 0000006E 01CB MOVW R25:R24, R23:R22
\r
742 \ 00000070 2DA2 MOV R26, R2
\r
743 \ 00000072 9508 RET
\r
747 324 /*! \brief Waits for two full cycles of ADC-conversions to occur.
\r
749 326 * This function clears the cycle complete-flag, then waits for it to be set
\r
750 327 * again. This is then repeated once before the function exits.
\r
754 \ In segment CODE, align 2, keep-with-next
\r
755 330 void ADC_Wait(void)
\r
759 332 // Clear ADC flag and wait for cycle to complete.
\r
760 333 ADCS.Flag = FALSE;
\r
762 335 } while (ADCS.Flag == FALSE);
\r
763 \ 00000000 CFFF RJMP ??ADC_Wait_0
\r
765 337 // Repeat, so we are sure the data beong to the same cycle.
\r
766 338 ADCS.Flag = FALSE;
\r
768 340 } while (ADCS.Flag == FALSE);
\r
772 344 /*! \brief Initializes ADC and input pins.
\r
774 346 * This function initializes the ADC to free running mode, sampling from
\r
775 347 * PA1/2/4/5/6/7, and using an external reference voltage (PA3).\n
\r
776 348 * It also measures and stores calibration data for offset.
\r
778 350 * \todo Odd offset measurement for ADC3_G20_OS? It is never used anyway.
\r
780 352 * \note Table of MUX settings for offset measurement:
\r
782 354 * Ch | Pin | Gain | MUX
\r
783 355 * ------+-----+---------+-------
\r
784 356 * ADC1 | PA1 | 20x | 001101
\r
785 357 * ADC3 | PA4 | 20x | 010001
\r
786 358 * ADC5 | PA6 | 20x | 010110
\r
787 359 * ADC9 | PB6 | 20x | 011011
\r
788 360 * ADC0 | PA0 | 20x/32x | 111000
\r
789 361 * ADC0 | PA0 | 1x/8x | 111001
\r
790 362 * ADC1 | PA1 | 20x/32x | 111010
\r
791 363 * ADC2 | PA2 | 20x/32x | 111011
\r
792 364 * ADC4 | PA5 | 20x/32x | 111100
\r
793 365 * ADC5 | PA6 | 20x/32x | 111101
\r
794 366 * ADC6 | PA7 | 20x/32x | 111110
\r
798 \ In segment CODE, align 2, keep-with-next
\r
799 369 void ADC_Init(void)
\r
802 371 unsigned char i;
\r
804 373 __disable_interrupt();
\r
805 \ 00000000 94F8 CLI
\r
807 375 ADCS.Halt = FALSE; // Enable consecutive runs of ADC.
\r
808 \ 00000002 .... LDI R30, LOW(ADCS)
\r
809 \ 00000004 .... LDI R31, (ADCS) >> 8
\r
810 \ 00000006 8100 LD R16, Z
\r
811 \ 00000008 770F ANDI R16, 0x7F
\r
812 \ 0000000A 8300 ST Z, R16
\r
814 377 // Configure ADC pins (inputs and disabled pull-ups).
\r
815 378 DDRA &= ~((1<<PA1)|(1<<PA2)|(1<<PA4)|(1<<PA5)|(1<<PA6)|(1<<PA7));
\r
816 \ 0000000C B30A IN R16, 0x1A
\r
817 \ 0000000E 7009 ANDI R16, 0x09
\r
818 \ 00000010 BB0A OUT 0x1A, R16
\r
819 379 PORTA &= ~((1<<PA1)|(1<<PA2)|(1<<PA4)|(1<<PA5)|(1<<PA6)|(1<<PA7));
\r
820 \ 00000012 B30B IN R16, 0x1B
\r
821 \ 00000014 7009 ANDI R16, 0x09
\r
822 \ 00000016 BB0B OUT 0x1B, R16
\r
824 381 // Set ADC3 as reference, and MUX to measure the same pin.
\r
825 382 ADMUX = (1<<REFS0) | (1<<MUX0) | (1<<MUX1);
\r
826 \ 00000018 E403 LDI R16, 67
\r
827 \ 0000001A B907 OUT 0x07, R16
\r
830 \ 0000001C E000 LDI R16, 0
\r
831 \ 0000001E B903 OUT 0x03, R16
\r
833 386 // Start conversion, no interrupt (disable ADC-ISR).
\r
834 387 ADCSRA = (1<<ADEN) | (1<<ADSC) | ADC_PRESCALER;
\r
835 \ 00000020 EC07 LDI R16, 199
\r
836 \ 00000022 B906 OUT 0x06, R16
\r
838 389 do { // Wait for conversion to finish.
\r
839 390 } while (!(ADCSRA & (1<<ADIF)));
\r
841 \ 00000024 9B34 SBIS 0x06, 0x04
\r
842 \ 00000026 CFFE RJMP ??ADC_Init_0
\r
844 392 ADCSRA |= (1<<ADIF); // Clear ADC interrupt flag manually.
\r
845 \ 00000028 9A34 SBI 0x06, 0x04
\r
847 394 ADCS.ADC3_G20_OS = ADC; // Save the sampled offset.
\r
848 \ 0000002A 8121 LDD R18, Z+1
\r
849 \ 0000002C 7F20 ANDI R18, 0xF0
\r
850 \ 0000002E B104 IN R16, 0x04
\r
851 \ 00000030 B115 IN R17, 0x05
\r
852 \ 00000032 700F ANDI R16, 0x0F
\r
853 \ 00000034 2B02 OR R16, R18
\r
854 \ 00000036 8301 STD Z+1, R16
\r
856 396 ADMUX = (1<<REFS0) | 0x16; // ADC5/ADC5 (external ref.), 20x
\r
857 \ 00000038 E516 LDI R17, 86
\r
858 \ 0000003A B917 OUT 0x07, R17
\r
860 398 // Start conversion, no interrupt. ADC_PRESCALER is defined in ADC.h.
\r
861 399 ADCSRA = (1<<ADEN) | (1<<ADSC) | ADC_PRESCALER;
\r
862 \ 0000003C EC17 LDI R17, 199
\r
863 \ 0000003E B916 OUT 0x06, R17
\r
865 401 do { // Wait for conversion to finish.
\r
866 402 } while (!(ADCSRA & (1<<ADIF)));
\r
868 \ 00000040 9B34 SBIS 0x06, 0x04
\r
869 \ 00000042 CFFE RJMP ??ADC_Init_1
\r
871 404 ADCSRA |= (1<<ADIF); // Clear ADC interrupt flag.
\r
872 \ 00000044 9A34 SBI 0x06, 0x04
\r
874 406 ADCS.ADC5_G20_OS = ADC; // Save the sampled offset.
\r
875 \ 00000046 700F ANDI R16, 0x0F
\r
876 \ 00000048 B124 IN R18, 0x04
\r
877 \ 0000004A B135 IN R19, 0x05
\r
878 \ 0000004C 9522 SWAP R18
\r
879 \ 0000004E 7F20 ANDI R18, 0xF0
\r
880 \ 00000050 2B20 OR R18, R16
\r
881 \ 00000052 8321 STD Z+1, R18
\r
883 408 // Reset the ADC-cycle.
\r
884 409 ADCS.Flag = FALSE;
\r
885 410 ADCS.MUX = 0x01;
\r
886 \ 00000054 8100 LD R16, Z
\r
887 \ 00000056 7C00 ANDI R16, 0xC0
\r
888 \ 00000058 6001 ORI R16, 0x01
\r
889 \ 0000005A 8300 ST Z, R16
\r
890 411 ADMUX = (1<<REFS0) | ADCS.MUX;
\r
891 \ 0000005C E401 LDI R16, 65
\r
892 \ 0000005E B907 OUT 0x07, R16
\r
894 413 // Clear averaged battery current and the discrete readings.
\r
895 414 ADCS.avgIBAT = 0;
\r
896 \ 00000060 E000 LDI R16, 0
\r
897 \ 00000062 8B06 STD Z+22, R16
\r
898 \ 00000064 8B07 STD Z+23, R16
\r
900 416 for (i = 0; i < 4; i++) {
\r
901 \ 00000066 963E ADIW R31:R30, 14
\r
902 \ 00000068 E024 LDI R18, 4
\r
903 417 ADCS.discIBAT[i] = 0;
\r
905 \ 0000006A 9301 ST Z+, R16
\r
906 \ 0000006C 9301 ST Z+, R16
\r
908 \ 0000006E 952A DEC R18
\r
909 \ 00000070 F7E1 BRNE ??ADC_Init_2
\r
911 420 // Re-enable the ADC and ISR.
\r
912 421 ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADIE)|ADC_PRESCALER;
\r
913 \ 00000072 EC0F LDI R16, 207
\r
914 \ 00000074 B906 OUT 0x06, R16
\r
916 423 __enable_interrupt();
\r
917 \ 00000076 9478 SEI
\r
919 425 // Get a complete cycle of data before returning.
\r
922 \ 00000078 CFFF RJMP ??ADC_Init_3
\r
923 \ 0000007A REQUIRE _A_PORTA
\r
924 \ 0000007A REQUIRE _A_DDRA
\r
925 \ 0000007A REQUIRE _A_ADMUX
\r
926 \ 0000007A REQUIRE _A_ADCSRA
\r
927 \ 0000007A REQUIRE _A_ADC
\r
928 \ 0000007A REQUIRE _A_ADCSRB
\r
931 \ In segment INTVEC, offset 0x16, root
\r
932 \ `??ADC_ISR??INTVEC 22`:
\r
933 \ 00000016 .... RJMP ADC_ISR
\r
935 Maximum stack usage in bytes:
\r
937 Function CSTACK RSTACK
\r
938 -------- ------ ------
\r
950 Segment part sizes:
\r
952 Function/Label Bytes
\r
953 -------------- -----
\r
967 ??ADC_ISR??INTVEC 22 2
\r
971 7 bytes in segment ABSOLUTE
\r
972 746 bytes in segment CODE
\r
973 1 byte in segment EEPROM_I
\r
974 6 bytes in segment INITTAB
\r
975 2 bytes in segment INTVEC
\r
976 25 bytes in segment NEAR_Z
\r
978 746 bytes of CODE memory (+ 8 bytes shared)
\r
979 25 bytes of DATA memory (+ 7 bytes shared)
\r
980 1 byte of XDATA memory
\r
projects / avr_bc100.git / blob