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1 /* |
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2 * GraphLCD driver library |
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3 * |
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4 * picctl.c - PIC controlled LCD driver class |
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5 * |
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6 * This file is released under the GNU General Public License. Refer |
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7 * to the COPYING file distributed with this package. |
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8 * |
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9 * Codebase by Andreas Regel <andreas.regel AT powarman.de> |
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10 * (c) 2007 Carsten Presser |
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11 */ |
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12 |
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13 #include <stdint.h> |
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14 #include <syslog.h> |
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15 #include <math.h> |
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16 |
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17 #include "common.h" |
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18 #include "config.h" |
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19 #include "port.h" |
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20 #include "picctl.h" |
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21 |
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22 |
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23 |
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24 namespace GLCD |
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25 { |
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26 |
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27 /* command header: |
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28 ** 8 bits sync byte (0xAA for sent commands, 0x55 for received commands) |
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29 ** 8 bits command id |
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30 ** 16 bits command length (excluding header) |
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31 */ |
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32 const unsigned char CMD_HDR_SYNC = 0; |
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33 const unsigned char CMD_HDR_COMMAND = 1; |
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34 const unsigned char CMD_HDR_LENGTH = 2; |
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35 const unsigned char CMD_DATA_START = 4; |
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36 |
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37 const unsigned char CMD_SYNC_SEND = 0xAA; |
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38 const unsigned char CMD_SYNC_RECV = 0x55; |
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39 |
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40 |
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41 const unsigned char CMD_SYS_SYNC = 0x00; |
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42 const unsigned char CMD_SYS_ACK = 0x01; |
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43 const unsigned char CMD_SYS_NACK = 0x02; |
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44 const unsigned char CMD_SYS_NIMP = 0xFF; |
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45 const unsigned char CMD_SYS_IR = 0x10; |
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46 |
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47 const unsigned char CMD_DISP_CLEAR_SCREEN = 0x10; |
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48 const unsigned char CMD_DISP_SET_ROW_DATA = 0x14; |
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49 const unsigned char CMD_DISP_SET_ADDRESS = 0x16; |
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50 |
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51 const unsigned char CMD_READ_CLOCK = 0x40; |
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52 const unsigned char CMD_WRITE_CLOCK = 0x41; |
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53 const unsigned char CMD_SET_PWM1 = 0x45; |
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54 const unsigned char CMD_SET_PWM2 = 0x46; |
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55 |
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56 const unsigned char CMD_SET_MODE_MANAGED = 0x70; |
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57 const unsigned char CMD_SET_MODE_UNMANAGED = 0x71; |
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58 |
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59 const unsigned char CMD_BOOT = 0x80; |
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60 // singleton |
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61 cDriverPICCtl* cDriverPICCtl::instance = 0; |
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62 |
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63 cDriverPICCtl* cDriverPICCtl::getInstance(cDriverConfig * config) |
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64 { |
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65 if (!instance) |
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66 instance = new cDriverPICCtl(config); |
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67 return instance; |
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68 } |
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69 // end singleton-pattern |
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70 |
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71 |
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72 |
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73 cDriverPICCtl::cDriverPICCtl(cDriverConfig * config) |
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74 : config(config) |
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75 { |
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76 oldConfig = new cDriverConfig(*config); |
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77 |
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78 port = new cSerialPort(); |
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79 |
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80 //width = config->width; |
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81 //height = config->height; |
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82 refreshCounter = 0; |
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83 ack_flag = false; |
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84 } |
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85 |
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86 cDriverPICCtl::~cDriverPICCtl() |
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87 { |
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88 delete port; |
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89 delete oldConfig; |
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90 } |
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91 |
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92 void cDriverPICCtl::SignalHandler(int signal) |
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93 { |
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94 unsigned char buf[255]; |
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95 int numbytes,i; |
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96 |
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97 numbytes = instance->port->ReadData(buf,255); |
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98 |
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99 |
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100 if ((buf[CMD_HDR_SYNC] == CMD_SYNC_RECV) && (buf[CMD_HDR_LENGTH+1] == (numbytes - CMD_DATA_START))) |
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101 { |
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102 switch (buf[CMD_HDR_COMMAND]) |
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103 { |
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104 case CMD_SYS_ACK: instance->ack_flag = true; |
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105 break; |
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106 |
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107 case CMD_SYS_IR: printf(" Incoming Key-Event 0x%02x (Source 0x%02x)\n",buf[CMD_DATA_START+1],buf[CMD_DATA_START]); |
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108 break; |
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109 |
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110 default: printf(" recieved Message 0x%x \n",buf[CMD_HDR_COMMAND]); |
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111 } |
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112 } |
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113 else |
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114 { |
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115 syslog(LOG_INFO, "PICCtl received a malformed packet.\n"); |
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116 for (i=0; i<numbytes; i++) |
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117 { |
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118 printf(" 0x%x",buf[i]); |
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119 } |
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120 printf("; recieved %d bytes2\n",numbytes); |
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121 } |
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122 |
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123 } |
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124 |
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125 int cDriverPICCtl::Init() |
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126 { |
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127 int y; |
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128 |
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129 // fixed values so far... |
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130 width = 240; |
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131 height = 64; |
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132 |
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133 for (unsigned int i = 0; i < config->options.size(); i++) |
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134 { |
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135 if (config->options[i].name == "") |
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136 { |
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137 } |
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138 } |
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139 |
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140 // setup lcd array (wanted state) |
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141 newLCD = new unsigned char*[height]; |
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142 if (newLCD) |
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143 { |
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144 for (y = 0; y < height; y++) |
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145 { |
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146 newLCD[y] = new unsigned char[width/8]; |
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147 memset(newLCD[y], 0, (width/8)); |
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148 } |
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149 } |
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150 // setup lcd array (current state) |
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151 oldLCD = new unsigned char*[height]; |
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152 if (oldLCD) |
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153 { |
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154 for (y = 0; y < height; y++) |
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155 { |
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156 oldLCD[y] = new unsigned char[width/8]; |
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157 memset(oldLCD[y], 0, (width/8)); |
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158 } |
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159 } |
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160 |
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161 if (config->device == "") |
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162 { |
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163 return -1; |
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164 } |
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165 if (port->Open(config->device.c_str(), SignalHandler) != 0) |
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166 return -1; |
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167 |
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168 *oldConfig = *config; |
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169 |
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170 // clear display |
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171 Clear(); |
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172 CmdDispClearScreen(); |
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173 CmdDispSetManaged(); |
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174 CmdDispSetBrightness(100); |
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175 |
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176 syslog(LOG_INFO, "%s: PICCtl initialized.\n", config->name.c_str()); |
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177 return 0; |
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178 } |
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179 |
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180 int cDriverPICCtl::DeInit() |
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181 { |
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182 int y; |
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183 // free lcd array (wanted state) |
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184 if (newLCD) |
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185 { |
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186 for (y = 0; y < height; y++) |
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187 { |
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188 delete[] newLCD[y]; |
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189 } |
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190 delete[] newLCD; |
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191 } |
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192 // free lcd array (current state) |
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193 if (oldLCD) |
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194 { |
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195 for (y = 0; y < height; y++) |
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196 { |
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197 delete[] oldLCD[y]; |
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198 } |
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199 delete[] oldLCD; |
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200 } |
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201 |
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202 CmdDispSetUnManaged(); |
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203 |
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204 delete instance; |
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205 instance = 0; |
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206 |
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207 if (port->Close() != 0) |
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208 return -1; |
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209 return 0; |
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210 } |
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211 |
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212 int cDriverPICCtl::CheckSetup() |
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213 { |
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214 if (config->device != oldConfig->device || |
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215 config->width != oldConfig->width || |
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216 config->height != oldConfig->height) |
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217 { |
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218 DeInit(); |
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219 Init(); |
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220 return 0; |
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221 } |
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222 |
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223 if (config->upsideDown != oldConfig->upsideDown || |
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224 config->invert != oldConfig->invert) |
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225 { |
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226 oldConfig->upsideDown = config->upsideDown; |
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227 oldConfig->invert = config->invert; |
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228 return 1; |
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229 } |
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230 return 0; |
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231 } |
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232 |
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233 void cDriverPICCtl::Clear() |
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234 { |
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235 for (int y = 0; y < height; y++) |
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236 memset(newLCD[y], 0, (width/8)); |
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237 } |
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238 |
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239 void cDriverPICCtl::Set8Pixels(int x, int y, unsigned char data) |
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240 { |
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241 if (x >= width || y >= height) |
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242 return; |
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243 |
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244 if (!config->upsideDown) |
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245 { |
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246 newLCD[y][x/8] = data; |
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247 } |
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248 else |
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249 { |
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250 x = width - 1 - x; |
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251 y = height - 1 - y; |
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252 newLCD[y][x / 8] |= ReverseBits(data); |
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253 } |
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254 } |
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255 |
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256 void cDriverPICCtl::Refresh(bool refreshAll) |
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257 { |
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258 int y; |
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259 |
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260 if (CheckSetup() == 1) |
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261 refreshAll = true; |
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262 |
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263 if (config->refreshDisplay > 0) |
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264 { |
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265 refreshCounter = (refreshCounter + 1) % config->refreshDisplay; |
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266 if (!refreshAll && !refreshCounter) |
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267 refreshAll = true; |
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268 } |
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269 |
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270 |
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271 if (refreshAll) |
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272 { |
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273 // draw all |
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274 // always draw a complete row! (30 bytes!) |
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275 for (y = 0; y < height; y++) |
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276 { |
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277 CmdDispSetColData(y, 0, (width/8), newLCD[y]); |
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278 memcpy(oldLCD[y], newLCD[y], (width/8)); |
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279 } |
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280 // and reset RefreshCounter |
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281 refreshCounter = 0; |
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282 } |
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283 else |
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284 { |
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285 // for every line |
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286 for (y = 0; y< height; y++) |
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287 { |
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288 // did anysthing change? -> draw new line |
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289 if (memcmp(newLCD[y],oldLCD[y],(width/8)) != 0) |
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290 { |
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291 CmdDispSetColData(y, 0, (width/8), newLCD[y]); |
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292 memcpy(oldLCD[y], newLCD[y], (width/8)); |
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293 } |
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294 } |
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295 } |
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296 } |
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297 |
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298 void cDriverPICCtl::SetBrightness(unsigned int percent) |
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299 { |
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300 CmdDispSetBrightness(percent); |
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301 } |
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302 |
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303 void cDriverPICCtl::SetClock(unsigned int percent) |
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304 { |
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305 CmdDispSetBrightness(percent); |
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306 } |
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307 |
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308 int cDriverPICCtl::WaitForAck(void) |
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309 { |
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310 int timeout; |
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311 |
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312 for (timeout=0; timeout<10000; timeout++) |
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313 { |
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314 usleep(10); |
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315 if (ack_flag) return 1; |
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316 } |
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317 syslog(LOG_INFO, "PICCtl: missed a ACK packet!.\n"); |
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318 return 0; |
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319 } |
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320 |
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321 void cDriverPICCtl::CmdDispClearScreen(void) |
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322 { |
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323 uint8_t cmd[4]; |
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324 |
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325 cmd[CMD_HDR_SYNC] = CMD_SYNC_SEND; |
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326 cmd[CMD_HDR_COMMAND] = CMD_DISP_CLEAR_SCREEN; |
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327 cmd[CMD_HDR_LENGTH] = 0; |
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328 cmd[CMD_HDR_LENGTH+1] = 0; |
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329 |
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330 port->WriteData(cmd, 4); |
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331 WaitForAck(); |
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332 } |
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333 |
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334 void cDriverPICCtl::CmdDispSetBrightness(uint8_t percent) |
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335 { |
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336 uint8_t cmd[5]; |
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337 |
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338 cmd[CMD_HDR_SYNC] = CMD_SYNC_SEND; |
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339 cmd[CMD_HDR_COMMAND] = CMD_SET_PWM1; |
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340 cmd[CMD_HDR_LENGTH] = 0; |
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341 cmd[CMD_HDR_LENGTH+1] = 1; |
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342 cmd[CMD_DATA_START] = (uint8_t) round(percent * 2.55); |
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343 |
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344 port->WriteData(cmd, 5); |
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345 WaitForAck(); |
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346 } |
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347 |
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348 void cDriverPICCtl::CmdDispSetColData(uint8_t yoffset, uint8_t xoffset, uint8_t length, uint8_t * data) |
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349 { |
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350 uint8_t cmd[64]; |
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351 uint16_t address; |
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352 |
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353 address = 0x1E * yoffset + xoffset; |
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354 |
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355 cmd[CMD_HDR_SYNC] = CMD_SYNC_SEND; |
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356 cmd[CMD_HDR_COMMAND] = CMD_DISP_SET_ROW_DATA; |
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357 cmd[CMD_HDR_LENGTH] = 0; |
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358 cmd[CMD_HDR_LENGTH+1] = (length + 2); |
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359 cmd[CMD_DATA_START] = (uint8_t)(address % 256); // lower address |
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360 cmd[CMD_DATA_START+1] = (uint8_t)(address / 256); // upper address |
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361 memcpy(&cmd[CMD_DATA_START+2], data, length); |
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362 |
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363 port->WriteData(cmd, length + 6); |
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364 WaitForAck(); |
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365 |
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366 // for (address = 0; address < length+6; address ++) printf("0x%02x ",cmd[address]); |
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367 // printf("address=0x%x upper=0x%x lower=0x%x \n", address, (uint8_t)(address / 256), (uint8_t)(address % 256)); |
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368 // printf("\n"); |
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369 } |
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370 |
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371 void cDriverPICCtl::CmdDispSetManaged(void) |
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372 { |
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373 uint8_t cmd[4]; |
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374 |
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375 cmd[CMD_HDR_SYNC] = CMD_SYNC_SEND; |
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376 cmd[CMD_HDR_COMMAND] = CMD_SET_MODE_MANAGED; |
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377 cmd[CMD_HDR_LENGTH] = 0; |
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378 cmd[CMD_HDR_LENGTH+1] = 0; |
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379 |
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380 port->WriteData(cmd,4); |
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381 WaitForAck(); |
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382 } |
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383 |
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384 void cDriverPICCtl::CmdDispSetUnManaged(void) |
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385 { |
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386 uint8_t cmd[4]; |
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387 |
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388 cmd[CMD_HDR_SYNC] = CMD_SYNC_SEND; |
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389 cmd[CMD_HDR_COMMAND] = CMD_SET_MODE_UNMANAGED; |
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390 cmd[CMD_HDR_LENGTH] = 0; |
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391 cmd[CMD_HDR_LENGTH+1] = 0; |
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392 |
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393 port->WriteData(cmd,4); |
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394 WaitForAck(); |
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395 } |
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396 |
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397 |
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398 } // end NameSpace |