diff options
Diffstat (limited to 'board/hyperdebug/board.c')
| -rw-r--r-- | board/hyperdebug/board.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/board/hyperdebug/board.c b/board/hyperdebug/board.c index 37e41f66a9..66cd981dca 100644 --- a/board/hyperdebug/board.c +++ b/board/hyperdebug/board.c @@ -20,6 +20,8 @@ #include "usb-stream.h" #include "gpio_list.h" +#include <stdio.h> + void board_config_pre_init(void) { /* enable SYSCFG clock */ @@ -236,6 +238,26 @@ static void board_init(void) } DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT); +const char *board_read_serial(void) +{ + const uint32_t *stm32_unique_id = + (const uint32_t *)STM32_UNIQUE_ID_BASE; + static char serial[13]; + + // Compute 12 hex digits from three factory programmed 32-bit "Unique + // ID" words in a manner that has been observed to be consistent with + // how the STM DFU ROM bootloader presents its serial number. This + // means that the serial number of any particular HyperDebug board will + // remain the same as it enters and leaves DFU mode for software + // upgrade. + int rc = snprintf(serial, sizeof(serial), "%08X%04X", + stm32_unique_id[0] + stm32_unique_id[2], + stm32_unique_id[1] >> 16); + if (12 != rc) + return NULL; + return serial; +} + /** * Find a GPIO signal by name. * |