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base serial number off of chip Unique device ID

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This commit is contained in:
Conor Patrick 2019-02-16 00:23:11 -05:00
parent 3fed8cebdf
commit 6fecb3c035
1 changed files with 27 additions and 2 deletions
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29
targets/stm32l432/lib/usbd/usbd_desc.c
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@ -166,6 +166,31 @@ uint8_t *USBD_HID_ManufacturerStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *l
*/
uint8_t *USBD_HID_SerialStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length)
{
USBD_GetString((uint8_t *)USBD_SERIAL_NUM, USBD_StrDesc, length);
return USBD_StrDesc;
volatile uint8_t * UUID = (volatile uint8_t *)0x1FFF7590;
uint8_t uuid[12];
uint8_t uuid_str[25];
char c;
int i;
uuid_str[24] = 0;
memmove(uuid,(uint8_t *)UUID,12);
// quick method to convert to hex string
for (i = 0; i < 12; i++)
{
c = uuid[i] & 0x0f;
if (c < 0x0a)
uuid_str[i * 2 + 1] = c + '0';
else
uuid_str[i * 2 + 1] = c + 'A' - 0x0a;
c = (uuid[i] & 0xf0) >> 4;
if (c < 0x0a)
uuid_str[i * 2] = c + '0';
else
uuid_str[i * 2] = c + 'A' - 0x0a;
}
USBD_GetString((uint8_t *)uuid_str, USBD_StrDesc, length);
return USBD_StrDesc;
}