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clear_otg_hs_memory: remove unpredictable write

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mcudev 2017-10-30 08:19:38 -04:00 committed by Pavol Rusnak
parent af86f57da3
commit 5be5e19f99
1 changed files with 0 additions and 2 deletions
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embed/trezorhal/common.c
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@ -56,8 +56,6 @@ void clear_otg_hs_memory(void)
{ {
// use the HAL version due to section 2.1.6 of STM32F42xx Errata sheet // use the HAL version due to section 2.1.6 of STM32F42xx Errata sheet
__HAL_RCC_USB_OTG_HS_CLK_ENABLE(); // enable USB_OTG_HS peripheral clock so that the peripheral memory is accessible __HAL_RCC_USB_OTG_HS_CLK_ENABLE(); // enable USB_OTG_HS peripheral clock so that the peripheral memory is accessible
const uint32_t unpredictable = rng_get();
memset_reg((volatile void *) USB_OTG_HS_DATA_FIFO_RAM, (volatile void *) (USB_OTG_HS_DATA_FIFO_RAM + USB_OTG_HS_DATA_FIFO_SIZE), unpredictable);
memset_reg((volatile void *) USB_OTG_HS_DATA_FIFO_RAM, (volatile void *) (USB_OTG_HS_DATA_FIFO_RAM + USB_OTG_HS_DATA_FIFO_SIZE), 0); memset_reg((volatile void *) USB_OTG_HS_DATA_FIFO_RAM, (volatile void *) (USB_OTG_HS_DATA_FIFO_RAM + USB_OTG_HS_DATA_FIFO_SIZE), 0);
__HAL_RCC_USB_OTG_HS_CLK_DISABLE(); // disable USB OTG_HS peripheral clock as the peripheral is not needed right now __HAL_RCC_USB_OTG_HS_CLK_DISABLE(); // disable USB OTG_HS peripheral clock as the peripheral is not needed right now
} }