main.cpp

00001 /* mbed Seeed 128x64 OLED Test
00002  * http://www.seeedstudio.com/depot/grove-oled-display-12864-p-781.html?cPath=163_167
00003  *
00004  * Copyright (c) 2012 Wim Huiskamp
00005  * Released under the MIT License: http://mbed.org/license/mit
00006  *
00007  * version 0.2 Initial Release
00008  * version 0.3 2017 Fixed non-copyable issue (Thx kenjiArai) 
00009  */
00010 #include "mbed.h"
00011 #include "mbed_logo.h"
00012 #include "SSD1308.h"
00013 #include "USBSerial.h"
00014  
00015 // Host PC Communication channels
00016 USBSerial pc;
00017 
00018 #define D_SDA                  PB_9
00019 #define D_SCL                  PB_8
00020 
00021 
00022 I2C i2c(D_SDA, D_SCL);
00023 
00024 //Host PC Baudrate (Virtual Com Port on USB)
00025 //#define D_BAUDRATE            9600
00026 //#define D_BAUDRATE            57600
00027 
00028 // mbed Interface Hardware definitions
00029 DigitalOut myled1(LED1);
00030 DigitalOut myled2(LED2);
00031 DigitalOut myled3(LED3);
00032 DigitalOut heartbeatLED(LED4);
00033 
00034 
00035 // Instantiate OLED
00036 SSD1308 oled = SSD1308(&i2c, SSD1308_SA0);
00037 
00038 void show_menu() {
00039     pc.printf("0: Exit\r");
00040     pc.printf("1: Show Menu\r");    
00041     pc.printf("2: Send Message\r"); 
00042     pc.printf("3: Fill Display\r");
00043     pc.printf("4: Display cleared\r");        
00044     pc.printf("5: Display off\r");            
00045     pc.printf("6: Display on\r");                
00046     pc.printf("7: Display Invert\r");                    
00047     pc.printf("8: Display Normal\r");                
00048     pc.printf("9: Display Bitmap\r");                    
00049     pc.printf("A: Brightness Ramp\r");                    
00050     pc.printf("B: Send Inverted Message\r");  
00051     pc.printf("C: Flip and Mirror\r");                      
00052     pc.printf("D: Blink\r");   
00053     pc.printf("E: Big Chars\r");                       
00054     pc.printf("F: Progress Scale\r");    
00055     pc.printf("G: Scroll\r");        
00056     pc.printf("H: Hor Scroll\r");    
00057     pc.printf("V: Ver and Hor Scroll\r");    
00058 //    pc.printf("\n\r");                
00059      
00060 }
00061 
00062 
00063 void oled_Test() {
00064   pc.printf("OLED test start\r"); 
00065 
00066 
00067   pc.printf("Hello World from ST32F401RE\n\r");      
00068  
00069   
00070 //  oled.writeString(0, 0, 13, "Hello World !");
00071   oled.writeString(0, 0, "Hello World !");  
00072   pc.printf("Printed something\r");    
00073   wait(3);
00074     
00075 //  oled.writeString(1, 0, 8, "baz quux");
00076   oled.writeString(1, 0, "baz quux");  
00077   pc.printf("Printed something\r");  
00078   wait(3);
00079     
00080 //  oled.writeString(4, 0, 272, "a long, rather lengthy, extended string passage thing, eh, that just goes on, and on, and on, and on, and on, and on, and on, yes, further, continuing, extending, expanding beyond all reason or sanity!!!!! and yet, there's more!  so much more!  for ever and ever, oh yeah");
00081 //  pc.printf("Printed something\r");
00082 //  wait(3);
00083 
00084   oled.fillDisplay(0xAA);
00085   pc.printf("Display filled\r");      
00086   wait(3);
00087 
00088   oled.setDisplayOff();
00089   pc.printf("Display off\r");          
00090   wait(0.5);
00091 
00092   oled.setDisplayOn();
00093   pc.printf("Display on\r");          
00094   wait(0.5);  
00095 
00096   oled.clearDisplay();
00097   pc.printf("Display cleared\r");        
00098   wait(0.5);
00099 
00100 //  oled.writeString(0, 0, 11, "Bye World !");
00101   oled.writeString(0, 0, "Bye World !");  
00102   pc.printf("Printed something\r");    
00103   wait(3);
00104 
00105   pc.printf("OLED test done\r");  
00106 }
00107 
00108 // Variables for Heartbeat and Status monitoring
00109 Ticker heartbeat;
00110 bool heartbeatflag=false;
00111 
00112 // Local functions
00113 void clear_screen() {
00114 //ANSI Terminal Commands
00115     pc.printf("\x1B[2J");
00116     pc.printf("\x1B[H");
00117 }
00118 
00119 
00120 void init_interfaces() {
00121     i2c.frequency(400000); // according to the spec the max bitrate for the SSD1308 is 400 kbit/s
00122 }
00123       
00124 
00125 // Heartbeat monitor
00126 void pulse() {
00127   heartbeatLED = !heartbeatLED;
00128 }
00129 
00130 void heartbeat_start() {
00131   heartbeat.attach(&pulse, 0.5);
00132 }
00133 
00134 void heartbeat_stop() {
00135   heartbeat.detach();
00136 }
00137 
00138 
00139 int main() {
00140     bool running=true;
00141     bool left = true;
00142     bool down = true;
00143    
00144     char command;
00145 
00146     init_interfaces();
00147     
00148     heartbeat_start();
00149           
00150     clear_screen(); 
00151   
00152     pc.printf("Hello World!\r");
00153 
00154 #if(0)
00155 // Quick test
00156     oled_Test(); 
00157     
00158     while(1) {
00159         myled1 = 1;
00160         wait(0.2);       
00161          
00162         myled1 = 0;
00163         wait(0.2);     
00164         pc.printf("*");
00165     }
00166 #else    
00167 // Interactive Test
00168     show_menu();
00169       
00170     while(running) {
00171           
00172        if(pc.readable()) {
00173          command = pc.getc();       
00174          //pc.printf("command= %c \n\r", command);         
00175          pc.printf("\r");         
00176          
00177          switch (command) {
00178           case '0' :
00179                      pc.printf("Done\r");                    
00180                      running = false;  
00181                      break;
00182           
00183           case '1' :
00184                      show_menu();
00185                      break;
00186                     
00187           case '2' :
00188                      pc.printf("Hello World!\r");  
00189                      oled.writeString(0, 0, "Hello World !");   
00190                      break;
00191           
00192           case '3' :
00193                      pc.printf("Fill part of Display 0xA5\r");            
00194 //                     oled.fillDisplay(0xA5);
00195                      
00196                      oled.fillDisplay(0xA5, 2, 5, 0, 63);                     
00197                      break;
00198 
00199           case '4' :
00200                      pc.printf("Display cleared\r");                  
00201                      oled.clearDisplay();
00202                      break;
00203 
00204           case '5' :
00205                      pc.printf("Display off\r");                
00206                      oled.setDisplayOff();                  
00207                      break;
00208           case '6' :
00209                      pc.printf("Display on\r");          
00210                      oled.setDisplayOn();                     
00211                      break;
00212 
00213           case '7' :
00214                      pc.printf("Display Invert\r");          
00215                      oled.setDisplayInverse();
00216                      break;
00217 
00218           case '8' :
00219                      pc.printf("Display Normal\r");
00220                      oled.setDisplayNormal();                                         
00221                      break;
00222 
00223           case '9' :
00224                      pc.printf("Display bitmap\r");          
00225                      oled.writeBitmap((uint8_t*) mbed_logo);
00226                                         
00227                      break;
00228 
00229           case 'A' :
00230                      pc.printf("Brightness Ramp Down\r");          
00231                      for (int contrast=0x7F; contrast >= 0x10; contrast--) { 
00232                         oled.setContrastControl(contrast);
00233                         wait(0.05);
00234                      }                   
00235                      
00236                      wait(1);
00237 
00238                      pc.printf("Brightness Ramp Up\r");          
00239                      for (int contrast=0x10; contrast <= 0x7F; contrast++) { 
00240                         oled.setContrastControl(contrast);
00241                         wait(0.05);
00242                      }                   
00243 
00244                      pc.printf("Brightness Ramp Done\r");                              
00245                      
00246                      break;
00247 
00248           case 'B' :
00249                      pc.printf("Send Inverted Message\r");
00250                      oled.setInverted(true);                     
00251 //                     oled.writeString(0, 0, 13, "Hello World !");                                                 
00252                      oled.writeString(0, 0, "Hello World !");                                                                      
00253                      oled.setInverted(false);                                          
00254 
00255                      oled.printf(" Result is %d", 12345);                                                 
00256 
00257                      break;
00258                      
00259           case 'C' :
00260                      pc.printf("Flip and Mirror (Rewrite display to show horizontal effect)\r");
00261                      left = !left;
00262                      down = !down;
00263                      oled.setDisplayFlip(left, down);                     
00264                      break;
00265           
00266           case 'D' :                     
00267                      pc.printf("D: Blink and Fade (not supported)\r");
00268 
00269 //                     oled.setDisplayBlink(true);
00270 //                     wait(4);
00271 //                     oled.setDisplayBlink(false);
00272 
00273                      oled.setDisplayFade(true);
00274                      wait(4);
00275                      oled.setDisplayFade(false);
00276                      
00277                      pc.printf("D: Blink done\r");
00278                      break;                       
00279                      
00280           case 'E' :                     
00281                      pc.printf("E: Big Chars\r");
00282                      
00283                      oled.writeBigChar(0,  0, '+');
00284                      oled.writeBigChar(0, 16, '7');
00285                      oled.writeBigChar(0, 32, '8');
00286                      oled.writeBigChar(0, 48, '9');                                          
00287                      
00288                      pc.printf("E: Big Chars done\r");
00289                      break;   
00290                      
00291           case 'F' :                     
00292                      pc.printf("F: Progress Scale\r");
00293 
00294                      for (int percentage=0; percentage <= 100; percentage++) { 
00295                        oled.writeProgressBar(2, 0, percentage); 
00296                        oled.printf(" %3d%%", percentage);                                           
00297                        
00298                        oled.writeProgressBar(4, 0, 100 - percentage);                        
00299                        oled.printf(" %3d%%", 100 - percentage);                                                                  
00300 
00301                        oled.writeLevelBar(6, 0, percentage);                        
00302                        oled.printf(" %3dmV", percentage);                                                                  
00303                        
00304                        wait(0.05);
00305                      }                   
00306                     
00307                      pc.printf("F: Progress Scale done\r");                   
00308                      break;   
00309                      
00310           case 'G' :                     
00311                      pc.printf("G: Scroll\r");
00312 
00313                      for (int line=0; line < ROWS; line++) { 
00314                        oled.setDisplayStartLine(line);                        
00315                        wait(0.05);
00316                      }                   
00317                        
00318                      oled.setDisplayStartLine(0);                                            
00319                      
00320                      pc.printf("G: Scroll done\r");                   
00321                      break;   
00322                      
00323 
00324           case 'H' :                     
00325 //                     pc.printf("H: Hor Scroll\r");
00326                      pc.printf("H: Hor Scroll (Page 0-3)\r");
00327 //                     oled.setContinuousHorizontalScroll(true, PAGE0, PAGE7, SCROLL_INTERVAL_25_FRAMES);                     
00328                      oled.setContinuousHorizontalScroll(true, PAGE0, PAGE3, SCROLL_INTERVAL_25_FRAMES);                                          
00329                      oled.setDisplayScroll(true);
00330                        
00331                      wait(5);                     
00332                      
00333                      oled.setDisplayScroll(false);
00334                      
00335                      pc.printf("H: Hor Scroll done\r");                   
00336                      break;   
00337 
00338 
00339           case 'V' :                     
00340                      pc.printf("V: Ver and Hor Scroll (Page 0-7)\r");
00341 
00342 
00343                      oled.setContinuousVerticalAndHorizontalScroll(true, PAGE0, PAGE7, 0x01, SCROLL_INTERVAL_25_FRAMES);
00344                      oled.setVerticalScrollArea(20, 20); 
00345 
00346                      oled.setDisplayScroll(true);
00347 
00348                        
00349                      wait(5);                     
00350                      
00351                      oled.setDisplayScroll(false);
00352                      
00353                      pc.printf("V: Ver and Hor Scroll done\r");                   
00354                      break;   
00355 
00356                                                                                                          
00357         } //switch
00358       }//if
00359     }//while
00360 #endif
00361 
00362     pc.printf("Bye World!\n\r");                       
00363 }//main    
00364