diff options
| -rw-r--r-- | ports/stm32/mboot/main.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/ports/stm32/mboot/main.c b/ports/stm32/mboot/main.c index 03620e6a3..99187e3ef 100644 --- a/ports/stm32/mboot/main.c +++ b/ports/stm32/mboot/main.c @@ -38,14 +38,12 @@ #include "powerctrl.h" #include "dfu.h" -// Using polling is about 10% faster than not using it (and using IRQ instead) -// This DFU code with polling runs in about 70% of the time of the ST bootloader +// This option selects whether to use explicit polling or IRQs for USB events. +// In some test cases polling mode can run slightly faster, but it uses more power. +// Polling mode will also cause failures with the mass-erase command because USB +// events will not be serviced for the duration of the mass erase. // With STM32WB MCUs only non-polling/IRQ mode is supported. -#if defined(STM32WB) #define USE_USB_POLLING (0) -#else -#define USE_USB_POLLING (1) -#endif // Using cache probably won't make it faster because we run at a low frequency, and best // to keep the MCU config as minimal as possible. |