diff options
| -rw-r--r-- | platforms/chibios/drivers/usbpd_stm32g4.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/platforms/chibios/drivers/usbpd_stm32g4.c b/platforms/chibios/drivers/usbpd_stm32g4.c index 0096f22f07..21b8f6db95 100644 --- a/platforms/chibios/drivers/usbpd_stm32g4.c +++ b/platforms/chibios/drivers/usbpd_stm32g4.c @@ -22,8 +22,6 @@ // Initialises the USBPD subsystem __attribute__((weak)) void usbpd_init(void) { - // Disable dead-battery signals - PWR->CR3 |= PWR_CR3_UCPD_DBDIS; // Enable the clock for the UCPD1 peripheral RCC->APB1ENR2 |= RCC_APB1ENR2_UCPD1EN; @@ -46,6 +44,11 @@ __attribute__((weak)) void usbpd_init(void) { CR |= UCPD_CR_ANAMODE | UCPD_CR_CCENABLE_Msk; // Apply the changes UCPD1->CR = CR; + + // Disable dead-battery signals only after UCPD1 is configured to ensure + // that the transition does not go through any intermediate state without + // any pull-down resistance. + PWR->CR3 |= PWR_CR3_UCPD_DBDIS; } // Gets the current state of the USBPD allowance |