Read UID for LPC82x

Athos88 — Sat, 11 Jun 2022 00:14:47 GMT

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,

Re: Read UID for LPC82x

ZhangJennie — Mon, 20 Jun 2022 07:28:29 GMT

Yes, user can define UID by self , thus we don't need IAP functions.

Best Regards

Jun Zhang

Re: Read UID for LPC82x

Athos88 — Wed, 22 Jun 2022 17:10:10 GMT

Ok I got it.

Thanks for the info.

LPC MicrocontrollersのトピックRead UID for LPC82x

Read UID for LPC82x

Re: Read UID for LPC82x

Re: Read UID for LPC82x