#define PUF_ACTIVATION_CODE_SIZE 1192U
    #define PUF_INTRINSIC_KEY_SIZE   16
    ...
    status_t result;
    uint8_t activationCode[PUF_ACTIVATION_CODE_SIZE];
    uint8_t keyCode1[PUF_GET_KEY_CODE_SIZE_FOR_KEY_SIZE(PUF_INTRINSIC_KEY_SIZE)];
    uint8_t intrinsicKey[16] = {0};
    /* Perform enroll to get device specific PUF activation code */
    /* Note: Enroll operation is usually performed only once for each device. */
    /* Activation code is stored and used in Start operation */
    result = PUF_Enroll(PUF, activationCode, sizeof(activationCode));
    if (result == kStatus_EnrollNotAllowed)
    {
        PRINTF("Enroll is not allowed!\r\n");
        PRINTF("Error during Enroll!\r\n");
        return result;
    }
    PUF_Deinit(PUF, &conf);
  /* Reinitialize PUF after enroll */
    result = PUF_Init(PUF, &conf);
    if (result != kStatus_Success)
    {
        PRINTF("Error Initializing PUF!\r\n");
        return result;
    }
    /* Start PUF by loading generated activation code */
    result = PUF_Start(PUF, activationCode, sizeof(activationCode));
    if (result == kStatus_StartNotAllowed)
    {
        PRINTF("Start is not allowed!\r\n");
        PRINTF("Error during Start !\r\n");
        return result;
    }
    /* Generate new intrinsic key with index 1 */
    result = PUF_SetIntrinsicKey(PUF, kPUF_KeyIndex_01, PUF_INTRINSIC_KEY_SIZE,
                                 keyCode1, sizeof(keyCode1));
    if (result != kStatus_Success)
    {
        PRINTF("Error setting intrinsic key!\r\n");
        return result;
    }
    /* Reconstruct intrinsic key from keyCode1 generated by PUF_SetIntrinsicKey() */
    result = PUF_GetKey(PUF, keyCode1, sizeof(keyCode1),
                        intrinsicKey, sizeof(intrinsicKey));
    if (result != kStatus_Success)
    {
        PRINTF("Error reconstructing intrinsic key!\r\n");
        return result;
    }
    PRINTF("Reconstructed intrinsic key = ");
    for (int i = 0; i < 16; i++)
    {
        PRINTF("%x ", intrinsicKey[i]);
    }
    PUF_Deinit(PUF, &conf);
    PRINTF("\r\n\nExample end.\r\n");
    return kStatus_Success;