main.cpp

00001 #include "mbed.h"
00002 
00003 // using a led
00004 DigitalOut myled(LED1);
00005 
00006 void DisconnectPLL0(){
00007     // good practice to disable before feeding
00008     __disable_irq();
00009     // disconnect
00010     LPC_SC->PLL0CON = 0x1;
00011     LPC_SC->PLL0FEED = 0xAA;
00012     LPC_SC->PLL0FEED = 0x55;
00013     while (LPC_SC->PLL0STAT&(1<<25));
00014     // power down
00015     LPC_SC->PLL0CON = 0x0;
00016     LPC_SC->PLL0FEED = 0xAA;
00017     LPC_SC->PLL0FEED = 0x55;
00018     while (LPC_SC->PLL0STAT&(1<<24));
00019     // This is the default flash read/write setting for IRC
00020     LPC_SC->FLASHCFG &= 0x0fff;
00021     LPC_SC->FLASHCFG |= 0x5000;
00022     LPC_SC->CCLKCFG = 0x0;
00023     //  Select the IRC as clk
00024     LPC_SC->CLKSRCSEL = 0x00;
00025     // not using XTAL anymore
00026     LPC_SC->SCS = 0x00;
00027 }
00028 
00029 // IAP address
00030 #define IAP_LOCATION 0x1FFF1FF1
00031 // variable for command and result
00032 unsigned int command[5];
00033 unsigned int result[5];
00034 // function pointer with 2 array parameters
00035 typedef void (*IAP)(unsigned int[5],unsigned int [5]);
00036 // declaration of the fptr.
00037 IAP iap_entry = (IAP)IAP_LOCATION;
00038 
00039 int main(){
00040     
00041    //! change clk to 4MHz - see below
00042    DisconnectPLL0();
00043    //! stop all ISRs
00044    __disable_irq();
00045    //!make IAP call
00046    command[0] = 57;
00047    iap_entry(command, result);
00048    
00049    //! This should never get executed
00050    while(1) {
00051        myled = 1;
00052        wait(0.2);
00053        myled = 0;
00054        wait(0.2);
00055    }
00056 }