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#include <board.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
#include <stdbool.h>
#include <memories/flash/flashd.h>
#include <usb/common/core/USBStringDescriptor.h>
#include <usb/device/dfu/dfu.h>
/* 128bit binary serial, equals 16 bytes -> 32 hex digits */
static uint8_t usb_serial_string[USBStringDescriptor_LENGTH(32)];
/* convert from 7-bit ASCII to USB string */
static int to_usb_string(unsigned char *out, int out_len, const char *in)
{
int in_len = strlen(in);
int num_out = USBStringDescriptor_LENGTH(in_len);
int i;
unsigned char *cur = out;
if (num_out > out_len || num_out >= 255 || num_out < 0)
return -EINVAL;
*cur++ = num_out;
*cur++ = USBGenericDescriptor_STRING;
for (i = 0; i < in_len; i++) {
*cur++ = in[i];
*cur++ = 0;
}
return cur - out;
}
static int chip_uid_to_usbstring(void)
{
unsigned long uniqueID[4];
int rc;
FLASHD_Initialize(0);
rc = FLASHD_ReadUniqueID(uniqueID);
if (rc != 0)
return -EIO;
/* we skip the step to transform the unique-id into hex before
* converting it into a USB string, as it seems to consist of ASCII
* characters instead of a true 128 bit binary unique identifier */
rc = to_usb_string(usb_serial_string, sizeof(usb_serial_string), (char *) uniqueID);
if (rc > 0)
return 0;
return rc;
}
int chipid_to_usbserial(void)
{
int rc;
rc = chip_uid_to_usbstring();
if (rc < 0)
return rc;
set_usb_serial_str(usb_serial_string);
return 0;
}
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