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uuid: cache uuid to improve stability and performance

This commit is contained in:
schneider 2012-04-02 13:41:48 +02:00
parent a25e3e00fd
commit 10f4015583
1 changed files with 14 additions and 11 deletions
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25
firmware/basic/uuid.c
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@ -6,18 +6,21 @@
#include "core/iap/iap.h" #include "core/iap/iap.h"
uint32_t GetUUID32(void){ uint32_t GetUUID32(void){
IAP_return_t iap_return; static uint32_t uuid = 0;
iap_return = iapReadSerialNumber(); if( uuid == 0){
if (iap_return.ReturnCode == 0){ IAP_return_t iap_return;
uint32_t block[4]; iap_return = iapReadSerialNumber();
uint32_t k[4] = {0,0,0,0}; if (iap_return.ReturnCode == 0){
int i; uint32_t block[4];
for(i=0; i<4; i++) uint32_t k[4] = {0,0,0,0};
block[i] = iap_return.Result[i]; int i;
xxtea_encode_words(block, 4, k); for(i=0; i<4; i++)
return block[0]; block[i] = iap_return.Result[i];
xxtea_encode_words(block, 4, k);
uuid = block[0];
}
} }
return 0; return uuid;
}; };
// What OpenBeacon used. Do we want this? // What OpenBeacon used. Do we want this?