diff options
| -rw-r--r-- | hw/bsp/board.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/hw/bsp/board.h b/hw/bsp/board.h index 9e36b990d..4970dc303 100644 --- a/hw/bsp/board.h +++ b/hw/bsp/board.h @@ -97,8 +97,22 @@ static inline void board_led_off(void) static inline void board_delay(uint32_t ms) { - uint32_t start_ms = board_millis(); - while( board_millis() < start_ms + ms) {} + if ( ms == 0 ) return; + + uint64_t end_ms = (uint64_t) board_millis(); + end_ms += ms; + + // about to overflows + if (end_ms > UINT32_MAX) + { + // first wait for overflow occurs since "ms" is small enough + while( board_millis() > ms ) {} + + // then adjust end time + end_ms -= UINT32_MAX; + } + + while( board_millis() < end_ms ) {} } static inline int8_t board_uart_getchar(void) |