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1 // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <kernel/kernel.h> |
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17 #include <integratorap.h> |
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18 #include <iolines.h> |
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19 |
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20 // NOTE: |
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21 // We use 2 different timers on this test: |
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22 // 1) the Core module FRC - 32-bit clocked at 24MHz, non-interruptible, for the time stamps |
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23 // 2) IntegratorAP Timer 1 - 16-bit, clocked at 1.5MHz , interruptible, for the Interrupts latency measurements |
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24 // |
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25 |
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26 #define KHwFrcFreqHz 24000000 // uses the core module FRC clocked at 24MHz |
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27 #define KHwApFreqHz 24000000 // uses the IntegratorAP Timer 1 clocked at 24MHz |
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28 |
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29 #include "k32bm.h" |
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30 |
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31 class DBMMi920Device : public DPhysicalDevice |
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32 { |
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33 public: |
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34 DBMMi920Device(); |
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35 virtual TInt Install(); |
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36 virtual void GetCaps(TDes8& aDes) const; |
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37 virtual TInt Create(DBase*& aChannel, TInt aUnit, const TDesC8* anInfo, const TVersion& aVer); |
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38 virtual TInt Validate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer); |
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39 }; |
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40 |
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41 class DBMMi920Channel : public DBMPChannel |
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42 { |
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43 public: |
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44 DBMMi920Channel(); |
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45 ~DBMMi920Channel(); |
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46 TInt InitialiseTimer(); |
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47 virtual TBMTicks TimerPeriod(); |
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48 virtual TBMTicks TimerStamp(); |
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49 virtual TBMNs TimerTicksToNs(TBMTicks); |
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50 virtual TBMTicks TimerNsToTicks(TBMNs); |
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51 virtual TInt BindInterrupt(MBMIsr*); |
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52 virtual TInt BindInterrupt(MBMInterruptLatencyIsr*); |
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53 virtual void RequestInterrupt(); |
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54 virtual void CancelInterrupt(); |
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55 |
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56 private: |
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57 |
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58 static void ClearAp1TimerInt(); |
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59 TInt BindInterrupt(); |
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60 |
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61 static const TBMTicks KBMMi920FrcPeriod = (((TBMTicks) 1) << 32); // FRC |
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62 static const TUint KBMMi920ApPeriod = (((TBMTicks) 1) << 16); // FRC |
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63 static const TBMNs KBMMi920NsPerTick = (1000*1000*1000) / KHwFrcFreqHz; // FRC |
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64 static const TUint KBMMi920InterruptDelayTicks = KHwApFreqHz / 1000; // 1ms in AP Timer 1 ticks |
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65 |
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66 static void Isr(TAny*); |
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67 |
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68 MBMIsr* iIsr; |
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69 MBMInterruptLatencyIsr* iInterruptLatencyIsr; |
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70 TInt iInterruptId; |
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71 }; |
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72 |
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73 DECLARE_STANDARD_PDD() |
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74 // |
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75 // Create a new device |
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76 // |
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77 { |
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78 __ASSERT_CRITICAL; |
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79 return new DBMMi920Device; |
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80 } |
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81 |
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82 DBMMi920Device::DBMMi920Device() |
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83 // |
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84 // Constructor |
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85 // |
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86 { |
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87 //iUnitsMask=0; |
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88 iVersion = TVersion(1,0,1); |
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89 } |
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90 |
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91 TInt DBMMi920Device::Install() |
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92 // |
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93 // Install the device driver. |
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94 // |
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95 { |
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96 TInt r = SetName(&KBMPdName); |
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97 return r; |
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98 } |
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99 |
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100 void DBMMi920Device::GetCaps(TDes8& aDes) const |
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101 // |
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102 // Return the Comm capabilities. |
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103 // |
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104 { |
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105 } |
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106 |
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107 TInt DBMMi920Device::Create(DBase*& aChannel, TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/) |
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108 // |
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109 // Create a channel on the device. |
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110 // |
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111 { |
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112 __ASSERT_CRITICAL; |
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113 DBMMi920Channel* pD= new DBMMi920Channel; |
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114 aChannel = pD; |
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115 TInt r=KErrNoMemory; |
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116 if (pD) |
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117 r=pD->InitialiseTimer(); |
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118 return r; |
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119 } |
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120 |
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121 TInt DBMMi920Device::Validate(TInt /*aUnit*/, const TDesC8* /*anInfo*/, const TVersion& aVer) |
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122 { |
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123 if (!Kern::QueryVersionSupported(iVersion,aVer)) |
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124 { |
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125 return KErrNotSupported; |
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126 } |
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127 return KErrNone; |
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128 } |
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129 |
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130 void DBMMi920Channel::ClearAp1TimerInt() |
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131 { |
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132 do |
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133 TIntegratorAP::ClearTimerInt(TIntegratorAP::ECounterTimer1); |
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134 // WARNING: Integrator bug! The timer interrupts are not always cleared the first time round |
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135 // so keep on clearing them until they are no longer active. |
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136 while (*(volatile TUint*)(KHwIrqBaseSet0) & KHtIntTimer1); |
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137 } |
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138 |
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139 DBMMi920Channel::DBMMi920Channel() |
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140 { |
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141 // iIsr = NULL; |
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142 // iInterruptLatencyIsr = NULL; |
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143 iInterruptId = KIntIdMatchGeneral2; |
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144 } |
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145 |
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146 DBMMi920Channel::~DBMMi920Channel() |
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147 { |
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148 // Disable the IntegratorAP Timer 1 and associated interrupt |
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149 if (iIsr || iInterruptLatencyIsr) |
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150 { |
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151 ClearAp1TimerInt(); |
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152 Interrupt::Disable(iInterruptId); |
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153 Interrupt::Unbind(iInterruptId); |
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154 } |
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155 TIntegratorAP::EnableTimer(TIntegratorAP::ECounterTimer1, TIntegratorAP::EDisable); |
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156 } |
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157 |
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158 TInt DBMMi920Channel::InitialiseTimer() |
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159 { |
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160 // Set up the IntegratorAP Timer 1 to run at 1.5MHz, free-running mode, and enable it |
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161 TIntegratorAP::SetTimerMode(TIntegratorAP::ECounterTimer1, TIntegratorAP::ETimerModeFreeRunning); |
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162 TIntegratorAP::SetTimerPreScale(TIntegratorAP::ECounterTimer1, TIntegratorAP::ETimerPreScaleNone); // 24MHz |
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163 TIntegratorAP::EnableTimer(TIntegratorAP::ECounterTimer1, TIntegratorAP::EEnable); |
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164 return KErrNone; |
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165 } |
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166 |
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167 TBMTicks DBMMi920Channel::TimerPeriod() |
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168 { |
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169 return KBMMi920FrcPeriod; |
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170 } |
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171 |
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172 TBMTicks DBMMi920Channel::TimerStamp() |
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173 { |
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174 return (*(volatile TUint*)(KHwRwCoreClkCounter)); // FRC |
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175 } |
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176 |
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177 TBMNs DBMMi920Channel::TimerTicksToNs(TBMTicks ticks) |
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178 { |
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179 return ticks * KBMMi920NsPerTick; // FRC |
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180 } |
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181 |
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182 TBMTicks DBMMi920Channel::TimerNsToTicks(TBMNs ns) |
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183 { |
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184 return ns / KBMMi920NsPerTick; // FRC |
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185 } |
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186 |
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187 |
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188 void DBMMi920Channel::Isr(TAny* ptr) |
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189 { |
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190 DBMMi920Channel* mCh = (DBMMi920Channel*) ptr; |
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191 BM_ASSERT(mCh->iIsr || mCh->iInterruptLatencyIsr); |
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192 if (mCh->iIsr) |
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193 { |
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194 mCh->iIsr->Isr(*(volatile TUint*)(KHwRwCoreClkCounter)); // read timestamp off FRC |
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195 } |
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196 else |
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197 { // calculate time elapsed between the interrupt going off and now in FRC ticks |
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198 TUint value = TIntegratorAP::TimerValue(TIntegratorAP::ECounterTimer1); |
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199 BM_ASSERT(((KHwFrcFreqHz/KHwApFreqHz)*KHwApFreqHz) == KHwFrcFreqHz); |
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200 mCh->iInterruptLatencyIsr->InterruptLatencyIsr((KBMMi920ApPeriod - value) * (KHwFrcFreqHz/KHwApFreqHz)); |
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201 } |
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202 ClearAp1TimerInt(); |
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203 Interrupt::Disable(mCh->iInterruptId); |
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204 } |
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205 |
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206 TInt DBMMi920Channel::BindInterrupt() |
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207 { |
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208 BM_ASSERT(iInterruptId==KIntIdMatchGeneral2); |
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209 TInt r=Interrupt::Bind(iInterruptId, Isr, this); |
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210 if (r<0) |
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211 { |
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212 return r; |
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213 } |
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214 iInterruptId = r; |
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215 return KErrNone; |
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216 } |
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217 |
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218 TInt DBMMi920Channel::BindInterrupt(MBMIsr* aIsr) |
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219 { |
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220 BM_ASSERT(!iIsr); |
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221 BM_ASSERT(!iInterruptLatencyIsr); |
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222 iIsr = aIsr; |
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223 return BindInterrupt(); |
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224 } |
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225 |
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226 TInt DBMMi920Channel::BindInterrupt(MBMInterruptLatencyIsr* aIsr) |
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227 { |
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228 BM_ASSERT(!iIsr); |
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229 BM_ASSERT(!iInterruptLatencyIsr); |
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230 iInterruptLatencyIsr = aIsr; |
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231 return BindInterrupt(); |
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232 } |
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233 |
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234 |
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235 void DBMMi920Channel::RequestInterrupt() |
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236 { |
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237 BM_ASSERT(iIsr || iInterruptLatencyIsr); |
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238 TIntegratorAP::SetTimerLoad(TIntegratorAP::ECounterTimer1, KBMMi920InterruptDelayTicks); |
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239 ClearAp1TimerInt(); |
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240 Interrupt::Enable(iInterruptId); // Timer interrupts on Integrator are always enabled! |
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241 } |
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242 |
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243 void DBMMi920Channel::CancelInterrupt() |
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244 { |
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245 if (iIsr || iInterruptLatencyIsr) |
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246 { |
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247 TIntegratorAP::EnableTimer(TIntegratorAP::ECounterTimer1, TIntegratorAP::EDisable); |
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248 } |
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249 } |
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250 |