Here is a way of reading the unique serial number from a G120 in native mode.
#define IAP_LOCATION (0x1FFF1FF1UL)
typedef enum
{
IAP_PREPARE = 50, // Prepare sector(s) for write operation
IAP_COPY_RAM2FLASH = 51, // Copy RAM to Flash
IAP_ERASE = 52, // Erase sector(s)
IAP_BLANK_CHECK = 53, // Blank check sector(s)
IAP_READ_PART_ID = 54, // Read chip part ID
IAP_READ_BOOT_VER = 55, // Read chip boot code version
IAP_COMPARE = 56, // Compare memory areas
IAP_REINVOKE_ISP = 57, // Reinvoke ISP
IAP_READ_SERIAL_NUMBER = 58, // Read serial number
} IAP_COMMAND_CODE;
typedef enum
{
CMD_SUCCESS, // Command is executed successfully.
INVALID_COMMAND, // Invalid command.
SRC_ADDR_ERROR, // Source address is not on a word boundary.
DST_ADDR_ERROR, // Destination address is not on a correct boundary.
SRC_ADDR_NOT_MAPPED, // Source address is not mapped in the memory map.
DST_ADDR_NOT_MAPPED, // Destination address is not mapped in the memory map.
COUNT_ERROR, // Byte count is not multiple of 4 or is not a permitted value.
INVALID_SECTOR, // Sector number is invalid.
SECTOR_NOT_BLANK, // Sector is not blank.
SECTOR_NOT_PREPARED_FOR_WRITE_OPERATION, // Command to prepare sector for write operation was not executed.
COMPARE_ERROR, // Source and destination data is not same.
BUSY, // Flash programming hardware interface is busy.
} IAP_STATUS_CODE;
typedef struct {
uint32_t cmd; // Command
uint32_t param[4]; // Parameters
uint32_t status; // status code
uint32_t result[4]; // Result
} IAP_COMMAND_Type;
// IAP Command
typedef void (*IAP)(uint32_t *cmd,uint32_t *result);
IAP iap_entry = (IAP) IAP_LOCATION;
#define IAP_Call iap_entry
IAP_STATUS_CODE ReadDeviceSerialNumLpc17xx(uint32_t *uid)
{
IAP_COMMAND_Type iapCmd;
iapCmd.cmd = IAP_READ_SERIAL_NUMBER;
IAP_Call (&iapCmd.cmd, &iapCmd.status);
if(iapCmd.status == CMD_SUCCESS)
{
if(uid != NULL)
{
uint32_t i = 0;
for(i = 0; i < 4; i++)
{
uid[i] = iapCmd.result[i];
}
}
}
return (IAP_STATUS_CODE)iapCmd.status;
}
If you call ReadDeviceSerialNumLpc17xx you will get the serial number in a uint32[4] array.
Convert this to a 16 byte array an run CRC32 and you will get a 32bit serial number out of the 128bit.
