src/main.cpp

Tue, 19 Jul 2016 21:17:39 +0200

author
David Douard <david.douard@logilab.fr>
date
Tue, 19 Jul 2016 21:17:39 +0200
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3021fc79cc3b
child 2
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permissions
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kinf of working prototype using a ILI9341 based TFT

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1 #include "stdio.h"
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2 #include "mbed.h"
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3 #include "string"
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4 #include "Arial12x12.h"
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5 #include "Arial28x28.h"
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6 //#include "Arial24x23.h"
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7 //#include "Terminal6x8.h"
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8 //#include "Arial43x48_numb.h"
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9
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10 #include "BufferedSerial.h"
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11
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12 #include "SPI8.h"
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13 #include "ILI9341.h"
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14
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15 Serial pc(USBTX, USBRX);
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16 BufferedSerial hp(PA_0, PA_1, 32); // serial4
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17
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18 ILI9341 tft(SPI_8, 24000000, PA_7, PA_6, PA_5, PA_4, PB_6, PC_7, "myLCD"); // Spi 8bit, 24MHz, mosi, miso, sclk, cs, reset, dc
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19 //ILI9341 tft(SPI_8, 24000000, PA_7, PA_6, PA_5, PA_4, PB_6, PB_5, "myLCD");
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20
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21 #define MAX_BUFF 13
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22 uint8_t curchar;
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23 uint8_t cmd;
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24 uint8_t nchars;
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25 char buffer[MAX_BUFF+1];
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26
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27 typedef struct _DSP
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28 {
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29 uint8_t cmd;
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30 uint16_t color;
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31 uint16_t bgcolor;
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32 uint8_t y0;
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33 uint8_t fmt; // 0=>ascii, 1=>hex, 2=>bits
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34 uint8_t maxsize;
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35 const unsigned char* font;
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36 char buffer[MAX_BUFF+1];
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37 } DSP;
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38
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39 static DSP table[] =
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40 {
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41 { 0x00, Yellow, Red, 5, 0, MAX_BUFF, Arial28x28},
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42 { 0x0C, Red, Blue, 40, 0, 3, Arial28x28},
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43 { 0x01, Blue, Yellow, 75, 1, MAX_BUFF, Arial12x12},
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44 { 0x02, Blue, Yellow, 110, 1, MAX_BUFF, Arial12x12},
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45 { 0x0A, Blue, Yellow, 145, 2, 4, Arial12x12},
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46 { 0xFF, Red, Black, 210, 0, MAX_BUFF, Arial12x12},
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47 };
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48 #define DEBUG
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49 #ifdef DEBUG
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50 #define DBGPIN PC_0
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51
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52 DigitalOut dbgpin(DBGPIN);
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53 inline void DebugPulse(uint8_t count=1)
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54 {
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55 while (count--)
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56 {
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57 dbgpin = 1;
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58 dbgpin = 0;
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59 }
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60 }
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61 #else
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62 inline void DebugPulse(uint8_t count=1)
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63 {}
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64 #endif
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65
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66 void setup() {
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67 // init the LCD
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68
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69 tft.set_orientation(3);
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70 pc.baud (115200);
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71 pc.printf("\n\nSystem Core Clock = %.3f MHZ\r\n",
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72 (float)SystemCoreClock/1000000);
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73
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74 hp.baud(187500);
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75
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76 // myLCD.set_font((unsigned char*) Terminal6x8);
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77 // myLCD.claim(stdout); // send stdout to the LCD display
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78 // myLCD.claim(stderr); // send stderr to the LCD display
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79 tft.background(Black); // set background to black
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80 tft.cls();
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81
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82 cmd = 0xFF;
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83 curchar = 0;
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84 nchars = 0;
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85 }
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86
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87 void go_msg() {
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88 tft.set_font((unsigned char*) Arial12x12);
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89 tft.locate(0, 210);
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90 }
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91
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92 void show(uint8_t cmd, char *txt, uint8_t nchar=0) {
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93 uint8_t i, len;
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94 uint16_t bgcolor, fgcolor;
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95 char *oldv;
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96
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97 len = MAX_BUFF;
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98
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99 for (i=0; i<sizeof(table)/sizeof(table[0]); ++i) {
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100 if (table[i].cmd == cmd) {
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101 bgcolor = table[i].bgcolor;
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102 fgcolor = table[i].color;
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103 tft.background(bgcolor);
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104 tft.foreground(fgcolor);
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105 tft.locate(0, table[i].y0);
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106 tft.set_font((unsigned char*) table[i].font);
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107 break;
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108 }
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109 }
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110
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111 switch (table[i].fmt) {
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112 case 0: //ascii
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113 tft.printf(txt);
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114 for (uint8_t j=nchar; j<table[i].maxsize; j++)
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115 tft.printf(" ");
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116 break;
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117 case 1: // hex
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118 for (uint8_t j=0; j<nchar; j++)
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119 tft.printf("%02X ", txt[j]);
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120 for (uint8_t j=nchar; j<table[i].maxsize; j++)
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121 tft.printf(" ");
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122 break;
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123 case 2: // binary
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124 for (uint8_t j=0; j<max(nchar, table[i].maxsize) ; j++) {
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125 //tft.setCursor(x0+w*i, y0+10);
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126 for (uint8_t k=0; k<8; k++) {
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127 if (txt[j] & (1 << (7-k)))
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128 tft.foreground(fgcolor);
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129 else
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130 tft.foreground(bgcolor);
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131 tft.printf("%d", (8-k));
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132 }
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133 }
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134 break;
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135 }
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136 }
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137
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138
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139 void loop() { // run over and over
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140 if (hp.readable()) {
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141 uint8_t val = hp.getc();
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142 DebugPulse();
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143 // 0xFF: idle
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144 // 0xFE: frame finished
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145 // 0x66: Start of transmission received
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146 if (cmd == 0xFF) {
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147 if ((val == 0x66) || (val == 0x99)) {
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148 cmd = val;
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149 } else if ((val == 0x00) || (val == 0x55)){
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150 // probably an ACK for a keypad related event
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151 } else {
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152 // display "junk" byte
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153 //DebugPulse();
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154 go_msg();
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155 tft.printf("%02X:> %02x", cmd, val);
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156 }
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157
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158 } else if (cmd == 0xFE ) {
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159 if ((val == 0x66) || (val == 0x99)) {
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160 cmd = val;
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161 } else if (val == 0x55) {
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162 cmd = 0xFF;
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163 } else if (val == 0x00){
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164 // probably an ACK for a keypad related event
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165 } else {
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166 // display "junk" byte
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167 //DebugPulse();
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168 go_msg();
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169 tft.printf("%02X=> %02x", cmd, val);
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170 }
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171
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172 } else if (cmd == 0x66) { // waiting for the display command
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173 if ((val == 0x0C) || (val == 0x00) || val == 0x01 || val == 0x02 || val == 0x0A) {
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174 cmd = val;
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175 nchars = 0;
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176 } else {
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177 cmd = 0xFE;
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178 // display unknown cmd byte
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179 //DebugPulse();
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180 go_msg();
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181 tft.printf("%02X-> %02x", cmd, val);
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182 }
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183
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184 } else if (cmd == 0x99) { // waiting for a 0x00, it's the DP that sent a keypress event
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185 if (val != 0x00) {
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186 go_msg();
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187 tft.printf("%02X kp %02X", cmd, val);
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188 }
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189 cmd =0xFF;
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190
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191 } else if (nchars == 0) { // waiting for the number of chars to display
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192 if (val>MAX_BUFF) {
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193 // display warning
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194 //dsp();
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195 //tft << cmd << " got len " << val;
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196 //DebugPulse();
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197 go_msg();
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198 tft.printf("%02X len %d", cmd, val);
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199 cmd = 0xFE; // weird
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200 } else {
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201 nchars = val;
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202 curchar = 0;
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203 }
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204
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205 } else { // a character to display
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206 buffer[curchar] = val;
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207 curchar++;
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208 if (curchar == nchars) {
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209 buffer[curchar] = 0x00;
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210 show(cmd, buffer, nchars);
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211 nchars = 0;
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212 curchar = 0;
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213 cmd = 0xFE;
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214 }
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215 }
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216 }
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217 }
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218
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219 int main()
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220 {
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221 setup();
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222 while(1)
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223 loop();
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224 }

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