Dear All,
Recently I started a work on LPC822 chip. In my project I would like to have a UID to identify each chip. After search from the forum I notice that I can use the IAP readUID function to achieve this.
In the fsl_iap of the SDK I got this part of code:
status_t IAP_ReadUniqueID(uint32_t *uniqueID)
{
#if defined(FSL_FEATURE_IAP_READ_UNIQUE_ID_NOWORK) && FSL_FEATURE_IAP_READ_UNIQUE_ID_NOWORK
uint32_t *result = (uint32_t *)0x01000100;
uint8_t i = 0;
for (i = 0; i < 4; i++)
uniqueID[i] = result[i];
return kStatus_IAP_Success;
#else
uint32_t command[5] = {0x00U};
uint32_t result[5] = {0x00U};
command[0] = (uint32_t)kIapCmd_IAP_ReadUid;
iap_entry(command, result);
uniqueID[0] = result[1];
uniqueID[1] = result[2];
uniqueID[2] = result[3];
uniqueID[3] = result[4];
return translate_iap_status(result[0]);
#endif
}
What is confusing me is the usage of the define:
FSL_FEATURE_IAP_READ_UNIQUE_ID_NOWORK
Seems in the case it is defined the UID will be directly read from the reserved address. So if I define it by myself, am I able to get the correct UID without actually invoke the IAP function?
Thank you for your time,
Best regards,
