1 /* ----------------------------------------------------------------------------
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2 * ATMEL Microcontroller Software Support
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3 * ----------------------------------------------------------------------------
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4 * Copyright (c) 2008, Atmel Corporation
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6 * All rights reserved.
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions are met:
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11 * - Redistributions of source code must retain the above copyright notice,
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12 * this list of conditions and the disclaimer below.
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14 * Atmel's name may not be used to endorse or promote products derived from
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15 * this software without specific prior written permission.
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17 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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20 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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23 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 * ----------------------------------------------------------------------------
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30 //------------------------------------------------------------------------------
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32 //------------------------------------------------------------------------------
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36 #include <utility/assert.h>
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40 //------------------------------------------------------------------------------
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41 // Local definitions
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42 //------------------------------------------------------------------------------
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44 /// Size of SLCDC buffer in bytes.
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45 #define BUFFER_SIZE 320
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47 //------------------------------------------------------------------------------
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49 //------------------------------------------------------------------------------
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51 //------------------------------------------------------------------------------
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52 /// Initializes the Segment LCD controller.
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53 /// \param commons Number of commons used by the display.
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54 /// \param segments Number of segments used by the display.
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55 /// \param bias Bias value.
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56 /// \param timeSetting Buffer timing value.
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57 //------------------------------------------------------------------------------
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58 void SLCDC_Configure(
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59 unsigned int commons,
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60 unsigned int segments,
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62 unsigned int timeSetting)
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64 SANITY_CHECK((commons > 0) && (commons <= 10));
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65 SANITY_CHECK((segments > 0) && (segments <= 40));
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66 SANITY_CHECK((bias & ~AT91C_SLCDC_BIAS) == 0);
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67 SANITY_CHECK((timeSetting & ~(0xF << 16)) == 0);
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68 SANITY_CHECK((timeSetting >> 16) < 0x0A);
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70 // Enable peripheral clock
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71 AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SLCD;
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72 AT91C_BASE_SLCDC->SLCDC_MR = (commons - 1) | ((segments - 1) << 8) | bias | timeSetting;
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75 //------------------------------------------------------------------------------
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76 /// Clears the SLCD display buffer.
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77 //------------------------------------------------------------------------------
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78 void SLCDC_Clear(void)
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80 memset((void *) AT91C_BASE_SLCDC->SLCDC_MEM, 0, BUFFER_SIZE);
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83 //------------------------------------------------------------------------------
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84 /// Enables the SLCD controller.
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85 //------------------------------------------------------------------------------
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86 void SLCDC_Enable(void)
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88 AT91C_BASE_SLCDC->SLCDC_CR = AT91C_SLCDC_LCDEN;
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89 while (AT91C_BASE_SLCDC -> SLCDC_SR != AT91C_SLCDC_ENA);
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92 //------------------------------------------------------------------------------
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93 /// Disables the SLCD controller.
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94 //------------------------------------------------------------------------------
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95 void SLCDC_Disable(void)
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97 AT91C_BASE_SLCDC->SLCDC_CR = AT91C_SLCDC_LCDDIS;
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100 //------------------------------------------------------------------------------
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101 /// Enables the SLCD low power mode.
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102 //------------------------------------------------------------------------------
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103 void SLCDC_EnableLowPowerMode(void)
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105 unsigned int value;
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107 value = AT91C_BASE_SLCDC->SLCDC_MR;
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108 value &= ~AT91C_SLCDC_LPMODE;
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109 value |=AT91C_SLCDC_LPMODE;
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110 AT91C_BASE_SLCDC->SLCDC_MR = value;
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113 //------------------------------------------------------------------------------
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114 /// Disables the SLCD low power mode
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115 //------------------------------------------------------------------------------
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116 void SLCDC_DisableLowPowerMode(void)
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118 unsigned int value;
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120 value = AT91C_BASE_SLCDC->SLCDC_MR;
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121 value &= ~AT91C_SLCDC_LPMODE;
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122 AT91C_BASE_SLCDC->SLCDC_MR = value;
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125 //------------------------------------------------------------------------------
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126 /// Adjusts the frame frequency. Frequency = FsCLK / (prescaler * divider . NCOM)
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127 /// \param prescalerValue Prescaler value
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128 /// \param dividerValue Divider value
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129 //------------------------------------------------------------------------------
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130 void SLCDC_SetFrameFreq(unsigned int prescalerValue, unsigned int dividerValue)
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132 SANITY_CHECK((prescalerValue & ~AT91C_SLCDC_PRESC) == 0);
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133 SANITY_CHECK((dividerValue & (~(0x07 << 8))) == 0);
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135 AT91C_BASE_SLCDC->SLCDC_FRR = prescalerValue | dividerValue;
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138 //------------------------------------------------------------------------------
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139 /// Sets the display mode (normal/force off/force on/blinking).
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140 /// \param mode Display mode to be set
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141 //------------------------------------------------------------------------------
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142 void SLCDC_SetDisplayMode(unsigned int mode)
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144 unsigned int value;
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146 SANITY_CHECK(mode < 8);
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148 value = AT91C_BASE_SLCDC->SLCDC_DR;
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149 value &= ~AT91C_SLCDC_DISPMODE;
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151 AT91C_BASE_SLCDC->SLCDC_DR = value;
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154 //------------------------------------------------------------------------------
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155 /// Adjusts the display blinking frequency.
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156 /// Blinking frequency = Frame Frequency / LCDBLKFREQ.
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157 /// \param frequency Frequency value.
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158 //------------------------------------------------------------------------------
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159 void SLCDC_SetBlinkFreq(unsigned int frequency)
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161 unsigned int value;
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163 SANITY_CHECK((frequency & ~(0xFF << 8)) == 0);
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165 value = AT91C_BASE_SLCDC->SLCDC_DR;
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166 value &= ~AT91C_SLCDC_BLKFREQ;
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167 value |= frequency;
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168 AT91C_BASE_SLCDC->SLCDC_DR = frequency;
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171 //------------------------------------------------------------------------------
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172 /// Enables the selected SLCDC interrupt sources.
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173 /// \param sources Interrupt sources to enable.
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174 //------------------------------------------------------------------------------
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175 void SLCDC_EnableInterrupts(unsigned int sources)
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177 SANITY_CHECK((sources & 0xFFFFFFFA) == 0);
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179 AT91C_BASE_SLCDC->SLCDC_IER = sources;
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182 //------------------------------------------------------------------------------
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183 /// Disables the selected SLCDC interrupt sources.
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184 /// \param sources Interrupt sources to disable.
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185 //------------------------------------------------------------------------------
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186 void SLCDC_DisableInterrupts(unsigned int sources)
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188 SANITY_CHECK((sources & 0xFFFFFFFA) == 0);
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190 AT91C_BASE_SLCDC->SLCDC_IDR = sources;
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