[ARM] IAP in LPC controllers

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Ragu Raman

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#define IAP_LOCATION 0x7ffffff1
...
unsigned long command[5];
unsigned long result[3];
...
typedef void (*IAP)(unsigned int [],unsigned int[]);
IAP iap_entry;

iap_entry = (IAP) IAP_LOCATION;

iap_entry(command, result);

Can someone explain how it works, especially:

iap_entry = (IAP) IAP_LOCATION;
iap_entry(command, result)
 

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