main.cpp

00001 /* ILI9341 interface for the NRF52832
00002  */
00003 
00004 #include "mbed.h"
00005 #include "display.h"
00006 /* Serial */
00007 #define BAUDRATE 9600
00008 Serial g_Serial_pc(P0_18, P0_14, BAUDRATE);
00009 
00010 /* DigitalOut */
00011 #define LED_ON      0
00012 #define LED_OFF     1
00013 
00014 DigitalOut DataLED(A5, LED_OFF);
00015 
00016 Display display;
00017 
00018 uint32_t prbs()
00019 {
00020     // This is an unverified 31 bit PRBS generator
00021     // It should be maximum length but this has not been verified 
00022     static uint32_t shift_register=0xaa551199;
00023     unsigned long new_bit=0;
00024     static int busy=0; // need to prevent re-entrancy here  
00025     if (!busy)
00026     {
00027         busy=1;
00028         new_bit= ((shift_register & (1<<27))>>27) ^ ((shift_register & (1<<30))>>30);
00029         new_bit= ~new_bit;
00030         new_bit = new_bit & 1;
00031         shift_register=shift_register << 1;
00032         shift_register=shift_register | (new_bit);
00033         busy=0;
00034     }
00035     return shift_register & 0x7ffffff; // return 31 LSB's 
00036 }
00037 uint32_t random(uint32_t lower,uint32_t upper)
00038 {
00039     return (prbs()%(upper-lower))+lower;
00040 }
00041 int main(void) {
00042   
00043     int count;
00044 
00045    
00046     display.begin();
00047     while(1)    
00048     {
00049         DataLED = !DataLED;
00050         if (display.penDown()) 
00051         {
00052             display.print(display.readXTouch(),10,10,display.RGBToWord(0xff,0xff,0),display.RGBToWord(0,0,0));
00053             display.print(display.readYTouch(),80,10,display.RGBToWord(0xff,0xff,0),display.RGBToWord(0,0,0));
00054         }        
00055         display.drawRectangle(random(0,240),random(0,320),random(0,240),random(0,320),random(0,0xffff));                                
00056         //display.fillRectangle(random(0,240),random(0,320),random(0,240),random(0,320),random(0,0xffff));                   
00057         display.drawCircle(random(0,240),random(0,240),random(0,320),random(0,0xffff));
00058         //display.fillCircle(random(0,240),random(0,320),random(0,120),random(0,0xffff));
00059         count++;
00060         if (count >= 10) 
00061         {
00062             display.fillRectangle(0,0,SCREEN_WIDTH,SCREEN_HEIGHT,0);
00063             count = 0;
00064         }
00065         
00066     }
00067 
00068     return 0;
00069 }