1 | /********** lcd.c *****************/
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2 | #include <16F1829.H>
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3 | #include "lcd.h"
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4 | #use delay(clock=16000000)
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5 |
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6 | void LCD_write4Bit(unsigned char zeichen)
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7 | {
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8 | LCD_E=0;
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9 | LCD_D7=zeichen &0x80;
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10 | LCD_D6=zeichen &0x40;
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11 | LCD_D5=zeichen &0x20;
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12 | LCD_D4=zeichen &0x10;
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13 | LCD_E=1;
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14 | LCD_E=0;
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15 | delay_us(50); //50µs warten
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16 | LCD_D7=zeichen &0x08;
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17 | LCD_D6=zeichen &0x04;
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18 | LCD_D5=zeichen &0x02;
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19 | LCD_D4=zeichen &0x01;
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20 | LCD_E=1;
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21 | LCD_E=0;
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22 | delay_us(50); //50 µs warten
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23 | }
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24 |
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25 | void LCD_reset()
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26 | {
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27 | LCD_E=0;
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28 | LCD_RS=REG;
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29 | LCD_D7=0;
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30 | LCD_D6=0;
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31 | LCD_D5=1;
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32 | LCD_D4=1;
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33 | LCD_E=1;
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34 | LCD_E=0;
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35 | delay_ms(5);
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36 | LCD_D7=0;
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37 | LCD_D6=0;
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38 | LCD_D5=1;
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39 | LCD_D4=1;
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40 | LCD_E=1;
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41 | LCD_E=0;
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42 | delay_us(100);
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43 | LCD_D7=0;
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44 | LCD_D6=0;
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45 | LCD_D5=1;
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46 | LCD_D4=1;
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47 | LCD_E=1;
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48 | LCD_E=0;
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49 | delay_ms(1);
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50 | }
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51 |
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52 |
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53 | void LCD_init()
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54 | {
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55 | LCD_reset();
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56 | LCD_E=0;
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57 | LCD_RS=REG;
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58 | LCD_D7=0;
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59 | LCD_D6=0;
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60 | LCD_D5=1;
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61 | LCD_D4=0;
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62 | LCD_E=1;
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63 | LCD_E=0;
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64 | delay_ms(2);
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65 | LCD_write4Bit(0x28);
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66 | delay_ms(2);
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67 | LCD_write4Bit(0x0c);
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68 | delay_ms(2);
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69 | LCD_write4Bit(0x01);
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70 | delay_ms(2); //1 ms warten
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71 | }
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72 |
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73 | void LCD_del()
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74 | {
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75 | LCD_RS=REG; //Registerbefehl
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76 | LCD_write4Bit(0x01); //Daten werden gesendet
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77 | delay_ms(1);//700µs warten
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78 | }
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79 |
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80 | void LCD_pos1()
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81 | {
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82 | LCD_RS=REG; //Registerbefehl
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83 | LCD_write4Bit(0x02); //Daten werden gesendet
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84 | delay_ms(1);//700µs warten
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85 | }
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86 |
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87 | void LCD_on()
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88 | {
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89 | LCD_RS=REG; //Registerbefehl
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90 | LCD_write4Bit(0x0C);//Daten werden gesendet
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91 | delay_us(50);//50µs warten
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92 | }
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93 |
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94 |
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95 | void LCD_out(char *text)
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96 | {
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97 | LCD_RS=DAT;
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98 | while(*text!='\0')
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99 | {
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100 | LCD_write4Bit(*text++); //string wird zeichen für zeichen ausgegeben bis '\0'
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101 | }
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102 | }
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103 | void LCD_movexy(unsigned char row, unsigned char col)
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104 | {
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105 | unsigned char address;
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106 | if (row==1)
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107 | {
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108 | address=0x80+col; //0x80 1.Zeile 1.Zeichen
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109 | }
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110 | else
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111 | {
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112 | address=0xc0+col; //0xc0 2.Zeile 1.Zeichen
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113 | }
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114 | LCD_RS=REG; //Registerbefehl
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115 | LCD_write4Bit(address); //Daten werden gesendet
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116 | delay_ms(1);//1 ms warten
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117 | }
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118 | void LCD_enable()
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119 | {
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120 | LCD_E=1;//negative Flanke wird erzeugt
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121 | LCD_E=0;
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122 | }
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123 |
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124 |
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125 | void DefineBarSigns()
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126 | {
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127 | // to set a bar with xx elements 0-100%
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128 | // 8 rows must be inserted for one user sign
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129 | unsigned char i;
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130 | unsigned char addr_inc;
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131 | unsigned char value=0;
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132 | unsigned char fac=1;
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133 |
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134 | LCD_RS = REG;
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135 | LCD_write4Bit(0x40); // address 0 character ram
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136 | // address auto increment
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137 | delay_ms(1);
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138 | for(addr_inc=0;addr_inc<6;addr_inc++)
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139 | {
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140 | LCD_RS = DAT;
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141 | LCD_write4Bit(0x1F);//(0b00011111); //Daten werden gesendet
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142 | delay_ms(1);
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143 | for (i=0;i<6;i++)
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144 | {
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145 | LCD_write4Bit(0x1F-value);//0b00011111 - value
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146 | delay_ms(1);
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147 | }
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148 | LCD_write4Bit(0x1F); //0b00011111
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149 | delay_ms(1);
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150 | value=value + fac;
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151 | fac=fac*2;
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152 | }
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153 | }
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154 |
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155 | void DrawBar(unsigned char percent) //10 segment
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156 | {
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157 | unsigned char i;
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158 | unsigned char rest=0;
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159 | unsigned char cnt_full=0;
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160 | unsigned char cnt_rest=0;
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161 | unsigned char cnt_barseg=0;
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162 |
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163 | if(percent>100)percent=100;
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164 | if(percent<0)percent=0;
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165 |
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166 | cnt_full = percent / 10;
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167 | rest = percent - cnt_full * 10;
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168 |
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169 | for(i=0;i<cnt_full;i++)
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170 | {
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171 | LCD_RS=DAT;
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172 | LCD_write4Bit(0);
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173 | cnt_barseg++;
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174 | }
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175 |
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176 | if(cnt_full<10)
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177 | {cnt_rest = rest / 2;
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178 | LCD_RS=DAT;
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179 | LCD_write4Bit(5-cnt_rest);
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180 | cnt_barseg++;
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181 | }
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182 | for(i=0;i<(10-cnt_barseg);i++)
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183 | {
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184 | LCD_RS=DAT;
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185 | LCD_write4Bit(5);
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186 | }
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187 | }
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