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ULPI low power mode fixes.
* Wait for DIR pin to go low.
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@ -159,6 +159,7 @@ void ulpi_leave_low_power(void)
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/* Enable GPIO clock for OTG USB STP pin */
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_GPIOI_CLK_ENABLE();
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/* Set OTG STP pin as GP Output */
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GPIO_InitStruct.Pin = GPIO_PIN_0;
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@ -167,15 +168,31 @@ void ulpi_leave_low_power(void)
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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/* Set OTG STP pin to High state during 4 milliseconds */
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GPIO_InitStruct.Pin = GPIO_PIN_11;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
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/* Set OTG STP pin to High */
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_SET);
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/* Delay 4 ms */
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HAL_Delay(10);
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/* Wait for DIR to go low */
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for (uint32_t ticks = HAL_GetTick();
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((HAL_GetTick() - ticks) < 500)
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&& HAL_GPIO_ReadPin(GPIOI, GPIO_PIN_11);) {
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__WFI();
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}
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GPIO_InitStruct.Pin = GPIO_PIN_0;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Alternate = GPIO_AF10_OTG_HS;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = GPIO_PIN_11;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Alternate = GPIO_AF10_OTG_HS;
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HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
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}
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#endif // defined(STM32F7) || defined(STM32H7)
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