HAL - Fix issues with HAL USB timeouts on fast processors.
* Occurs more frequently on >=480Mhz CPUs. * Occurs more frequently on RELEASE builds due to optimizations. Patch comes from here: https://community.st.com/s/question/0D50X0000BCMFx0SQH/usbhs-ulpi-on-stm32h750 Confirmed fixed on H730 @ 520Mhz RELEASE build.
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@ -49,6 +49,27 @@
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/** @defgroup USB_OTG_GRSTCTL_AHBIDL_TIMEOUT_MS AHB master idle timeout
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* @{
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*/
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#define USB_OTG_GRSTCTL_AHBIDL_TIMEOUT_MS ((uint32_t)50U)
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/** @defgroup USB_OTG_GRSTCTL_CSRST_TIMEOUT_MS Core soft reset timeout
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* @{
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*/
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#define USB_OTG_GRSTCTL_CSRST_TIMEOUT_MS ((uint32_t)10U)
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/** @defgroup USB_OTG_GRSTCTL_TXFFLSH_TIMEOUT_MS Tx FIFO flush timeout
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* @{
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*/
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#define USB_OTG_GRSTCTL_TXFFLSH_TIMEOUT_MS ((uint32_t)5U)
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/** @defgroup USB_OTG_GRSTCTL_RXFFLSH_TIMEOUT_MS Rx FIFO flush timeout
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* @{
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*/
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#define USB_OTG_GRSTCTL_RXFFLSH_TIMEOUT_MS ((uint32_t)5U)
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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@ -432,19 +453,22 @@ HAL_StatusTypeDef USB_DevInit(USB_OTG_GlobalTypeDef *USBx, USB_OTG_CfgTypeDef cf
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*/
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HAL_StatusTypeDef USB_FlushTxFifo(USB_OTG_GlobalTypeDef *USBx, uint32_t num)
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{
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uint32_t count = 0U;
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uint32_t tickstart;
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USBx->GRSTCTL = (USB_OTG_GRSTCTL_TXFFLSH | (num << 6));
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do
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/* Get tick */
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tickstart = HAL_GetTick();
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/* Wait for AHB master IDLE state. */
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_TXFFLSH) == USB_OTG_GRSTCTL_TXFFLSH)
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{
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if (++count > 200000U)
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if ((HAL_GetTick() - tickstart) > USB_OTG_GRSTCTL_TXFFLSH_TIMEOUT_MS)
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{
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return HAL_TIMEOUT;
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}
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}
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_TXFFLSH) == USB_OTG_GRSTCTL_TXFFLSH);
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return HAL_OK;
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}
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@ -455,18 +479,21 @@ HAL_StatusTypeDef USB_FlushTxFifo(USB_OTG_GlobalTypeDef *USBx, uint32_t num)
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*/
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HAL_StatusTypeDef USB_FlushRxFifo(USB_OTG_GlobalTypeDef *USBx)
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{
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uint32_t count = 0;
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uint32_t tickstart;
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USBx->GRSTCTL = USB_OTG_GRSTCTL_RXFFLSH;
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do
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/* Get tick */
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tickstart = HAL_GetTick();
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/* Wait for AHB master IDLE state. */
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_RXFFLSH) == USB_OTG_GRSTCTL_RXFFLSH)
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{
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if (++count > 200000U)
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if ((HAL_GetTick() - tickstart) > USB_OTG_GRSTCTL_RXFFLSH_TIMEOUT_MS)
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{
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return HAL_TIMEOUT;
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}
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}
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_RXFFLSH) == USB_OTG_GRSTCTL_RXFFLSH);
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return HAL_OK;
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}
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@ -1295,30 +1322,33 @@ HAL_StatusTypeDef USB_EP0_OutStart(USB_OTG_GlobalTypeDef *USBx, uint8_t dma, uin
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*/
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static HAL_StatusTypeDef USB_CoreReset(USB_OTG_GlobalTypeDef *USBx)
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{
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uint32_t count = 0U;
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uint32_t tickstart;
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/* Get tick */
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tickstart = HAL_GetTick();
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/* Wait for AHB master IDLE state. */
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do
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_AHBIDL) == 0U)
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{
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if (++count > 200000U)
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if ((HAL_GetTick() - tickstart) > USB_OTG_GRSTCTL_AHBIDL_TIMEOUT_MS)
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{
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return HAL_TIMEOUT;
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}
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}
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_AHBIDL) == 0U);
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/* Core Soft Reset */
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count = 0U;
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USBx->GRSTCTL |= USB_OTG_GRSTCTL_CSRST;
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do
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/* Get tick */
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tickstart = HAL_GetTick();
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST)
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{
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if (++count > 200000U)
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if ((HAL_GetTick() - tickstart) > USB_OTG_GRSTCTL_CSRST_TIMEOUT_MS)
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{
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return HAL_TIMEOUT;
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}
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}
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while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST);
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return HAL_OK;
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}
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