oled/oled_passwd.cpp

   1 #include "ArduiPi_OLED_lib.h"
   2 #include "Adafruit_GFX.h"
   3 #include "ArduiPi_OLED.h"
   4
   5 #include <getopt.h>
   6 #include <stdio.h>
   7
   8 #define ERR_FAIL 0
   9 //yes, this is irritating to unix users, but a return val >= 1 will mean nth item selected
  10 ArduiPi_OLED display; // Instantiate the display
  11
  12 // Config Option
  13 struct s_opts {
  14         int oled;
  15         int verbose;
  16 } ;
  17
  18 // default options values
  19 s_opts opts = {
  20         3,      // my .96" oled
  21         false   // Not verbose
  22 };
  23
  24 void testdrawchar(void) {
  25   display.setTextSize(1);
  26   display.setTextColor(WHITE);
  27   display.setCursor(0,0);
  28
  29   for (uint8_t i=0; i < 168; i++) {
  30     if (i == '\n') continue;
  31     display.write(i);
  32     //if ((i > 0) && (i % 21 == 0))
  33       //display.print("\n");
  34   }
  35   display.display();
  36 }
  37
  38
  39 void disp_login (char* title, int ast_n) {
  40         display.clearDisplay();
  41         display.setTextSize(1);
  42         display.setTextColor(WHITE);
  43         display.setCursor(0,0);
  44         display.print (title);
  45         display.drawLine(0, 8, display.width()-1, 8, WHITE);
  46
  47         display.setCursor(0,10);
  48         display.printf ("Enter GPG Passphrase:\n");
  49         for (int i = 0; i < ast_n; i++) {
  50                 display.printf ("*");
  51         }
  52
  53         display.display();
  54 }
  55
  56 int the_login (char* title) {
  57         int asterisks_num = 0;
  58         system  ("/bin/stty raw");//send keystrokes immediately, not just after enter key
  59         while (1) {
  60                 disp_login (title, asterisks_num);
  61
  62                 switch (getchar()) {
  63                 case 'j':
  64                         asterisks_num--;
  65                         break;
  66                 case 'k':
  67                         asterisks_num++;
  68                         break;
  69                 case ' ':
  70                         system ("/bin/stty cooked");//return to normal mode
  71                         return asterisks_num;
  72                         break;
  73                 }
  74         }
  75 }
  76
  77
  78 int main(int argc, char **argv)
  79 {
  80         if ( !display.init(OLED_I2C_RESET,opts.oled) ) {
  81                 return ERR_FAIL;
  82         }
  83
  84         display.begin();
  85
  86         //display.clearDisplay();   // clears the screen  buffer
  87         //display.display();            // display it (clear display)
  88
  89         display.clearDisplay();
  90
  91         // draw the first ~12 characters in the font
  92         //testdrawchar();
  93         //display.display();
  94         //sleep(2);
  95         //display.clearDisplay();
  96
  97         //#####mystuff
  98
  99         return the_login ("Hardpass");
 100         //############
 101
 102         display.close(); // Free PI GPIO ports
 103 }
 104
 105