test_mode.cpp

00001 #include "mbed.h"
00002 
00003 extern Serial pc;
00004 
00005 
00006 char test_char = 0;
00007 int test = 1;
00008 
00009 void get_char() {
00010     test_char = pc.getc();
00011     if(test_char == 's') test=0;
00012     pc.printf("\n\r"); 
00013 }  
00014 
00015 void testmode() {
00016     DigitalOut sda(p9,1);
00017     DigitalOut scl(p10,1);
00018     LPC_PINCON->PINMODE_OD0 = (LPC_PINCON->PINMODE_OD0  | 0x0003); // To make p9 & P10 open_drain
00019     Timer timer1;
00020     test = 1; 
00021     test_char = 0;
00022     pc.printf("\n\n\r\tStarting test-mode pattern generation ...\n\r");
00023     pc.printf("\n\n\r\tEnter 's' to stop test-mode: ");
00024     pc.attach(&get_char); //interupt looking for character entry    
00025     timer1.start();
00026     while(test) {
00027         while(timer1.read_us()<300) {
00028         }
00029         sda=0;
00030         while(timer1.read_us()<600) {
00031         }
00032         scl=0;
00033         while(timer1.read_us()<900) {
00034         }               
00035         sda=1;
00036         while(timer1.read_us()<950) {
00037         } 
00038         scl=1;
00039         while(timer1.read_us()<1200) {
00040         }
00041         timer1.reset();             
00042     }
00043     timer1.stop();
00044     scl=1;
00045     sda=1;
00046     pc.printf("\n\n\r\t....test-mode pattern generation stopped\n\n\r");
00047     sda.~DigitalOut();
00048     scl.~DigitalOut();
00049     pc.attach(NULL);
00050     return; 
00051 }