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pigweed / third_party / github / STMicroelectronics / stm32l5xx_hal_driver / d262a5e925a60d6500b1e89f1c15ff521a15e78f / . / Src / stm32l5xx_ll_usb.c
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/**
******************************************************************************
* @file stm32l5xx_ll_usb.c
* @author MCD Application Team
* @brief USB Low Layer HAL module driver.
*
* This file provides firmware functions to manage the following
* functionalities of the USB Peripheral Controller:
* + Initialization/de-initialization functions
* + I/O operation functions
* + Peripheral Control functions
* + Peripheral State functions
*
@verbatim
==============================================================================
##### How to use this driver #####
==============================================================================
[..]
(#) Fill parameters of Init structure in USB_OTG_CfgTypeDef structure.
(#) Call USB_CoreInit() API to initialize the USB Core peripheral.
(#) The upper HAL HCD/PCD driver will call the right routines for its internal processes.
@endverbatim
******************************************************************************
* @attention
*
* Copyright (c) 2019 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32l5xx_hal.h"
/** @addtogroup STM32L5xx_LL_USB_DRIVER
* @{
*/
#if defined (HAL_PCD_MODULE_ENABLED) || defined (HAL_HCD_MODULE_ENABLED)
#if defined (USB)
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes the USB Core
* @param USBx USB Instance
* @param cfg pointer to a USB_CfgTypeDef structure that contains
* the configuration information for the specified USBx peripheral.
* @retval HAL status
*/
HAL_StatusTypeDef USB_CoreInit(USB_TypeDef *USBx, USB_CfgTypeDef cfg)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(USBx);
UNUSED(cfg);
/* NOTE : - This function is not required by USB Device FS peripheral, it is used
only by USB OTG FS peripheral.
- This function is added to ensure compatibility across platforms.
*/
return HAL_OK;
}
/**
* @brief USB_EnableGlobalInt
* Enables the controller's Global Int in the AHB Config reg
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_EnableGlobalInt(USB_TypeDef *USBx)
{
uint32_t winterruptmask;
/* Clear pending interrupts */
USBx->ISTR = 0U;
/* Set winterruptmask variable */
winterruptmask = USB_CNTR_CTRM | USB_CNTR_WKUPM |
USB_CNTR_SUSPM | USB_CNTR_ERRM |
USB_CNTR_SOFM | USB_CNTR_ESOFM |
USB_CNTR_RESETM | USB_CNTR_L1REQM;
/* Set interrupt mask */
USBx->CNTR = (uint16_t)winterruptmask;
return HAL_OK;
}
/**
* @brief USB_DisableGlobalInt
* Disable the controller's Global Int in the AHB Config reg
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_DisableGlobalInt(USB_TypeDef *USBx)
{
uint32_t winterruptmask;
/* Set winterruptmask variable */
winterruptmask = USB_CNTR_CTRM | USB_CNTR_WKUPM |
USB_CNTR_SUSPM | USB_CNTR_ERRM |
USB_CNTR_SOFM | USB_CNTR_ESOFM |
USB_CNTR_RESETM | USB_CNTR_L1REQM;
/* Clear interrupt mask */
USBx->CNTR &= (uint16_t)(~winterruptmask);
return HAL_OK;
}
/**
* @brief USB_SetCurrentMode Set functional mode
* @param USBx Selected device
* @param mode current core mode
* This parameter can be one of the these values:
* @arg USB_DEVICE_MODE Peripheral mode
* @retval HAL status
*/
HAL_StatusTypeDef USB_SetCurrentMode(USB_TypeDef *USBx, USB_ModeTypeDef mode)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(USBx);
UNUSED(mode);
/* NOTE : - This function is not required by USB Device FS peripheral, it is used
only by USB OTG FS peripheral.
- This function is added to ensure compatibility across platforms.
*/
return HAL_OK;
}
/**
* @brief USB_DevInit Initializes the USB controller registers
* for device mode
* @param USBx Selected device
* @param cfg pointer to a USB_CfgTypeDef structure that contains
* the configuration information for the specified USBx peripheral.
* @retval HAL status
*/
HAL_StatusTypeDef USB_DevInit(USB_TypeDef *USBx, USB_CfgTypeDef cfg)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(cfg);
/* Init Device */
/* CNTR_FRES = 1 */
USBx->CNTR = (uint16_t)USB_CNTR_FRES;
/* CNTR_FRES = 0 */
USBx->CNTR = 0U;
/* Clear pending interrupts */
USBx->ISTR = 0U;
/*Set Btable Address*/
USBx->BTABLE = BTABLE_ADDRESS;
return HAL_OK;
}
#if defined (HAL_PCD_MODULE_ENABLED)
/**
* @brief Activate and configure an endpoint
* @param USBx Selected device
* @param ep pointer to endpoint structure
* @retval HAL status
*/
HAL_StatusTypeDef USB_ActivateEndpoint(USB_TypeDef *USBx, USB_EPTypeDef *ep)
{
HAL_StatusTypeDef ret = HAL_OK;
uint16_t wEpRegVal;
wEpRegVal = PCD_GET_ENDPOINT(USBx, ep->num) & USB_EP_T_MASK;
/* initialize Endpoint */
switch (ep->type)
{
case EP_TYPE_CTRL:
wEpRegVal |= USB_EP_CONTROL;
break;
case EP_TYPE_BULK:
wEpRegVal |= USB_EP_BULK;
break;
case EP_TYPE_INTR:
wEpRegVal |= USB_EP_INTERRUPT;
break;
case EP_TYPE_ISOC:
wEpRegVal |= USB_EP_ISOCHRONOUS;
break;
default:
ret = HAL_ERROR;
break;
}
PCD_SET_ENDPOINT(USBx, ep->num, (wEpRegVal | USB_EP_CTR_RX | USB_EP_CTR_TX));
PCD_SET_EP_ADDRESS(USBx, ep->num, ep->num);
if (ep->doublebuffer == 0U)
{
if (ep->is_in != 0U)
{
/*Set the endpoint Transmit buffer address */
PCD_SET_EP_TX_ADDRESS(USBx, ep->num, ep->pmaadress);
PCD_CLEAR_TX_DTOG(USBx, ep->num);
if (ep->type != EP_TYPE_ISOC)
{
/* Configure NAK status for the Endpoint */
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_NAK);
}
else
{
/* Configure TX Endpoint to disabled state */
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
}
}
else
{
/*Set the endpoint Receive buffer address */
PCD_SET_EP_RX_ADDRESS(USBx, ep->num, ep->pmaadress);
/*Set the endpoint Receive buffer counter*/
PCD_SET_EP_RX_CNT(USBx, ep->num, ep->maxpacket);
PCD_CLEAR_RX_DTOG(USBx, ep->num);
/* Configure VALID status for the Endpoint*/
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_VALID);
}
}
/*Double Buffer*/
else
{
/* Set the endpoint as double buffered */
PCD_SET_EP_DBUF(USBx, ep->num);
/* Set buffer address for double buffered mode */
PCD_SET_EP_DBUF_ADDR(USBx, ep->num, ep->pmaaddr0, ep->pmaaddr1);
if (ep->is_in == 0U)
{
/* Clear the data toggle bits for the endpoint IN/OUT */
PCD_CLEAR_RX_DTOG(USBx, ep->num);
PCD_CLEAR_TX_DTOG(USBx, ep->num);
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_VALID);
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
}
else
{
/* Clear the data toggle bits for the endpoint IN/OUT */
PCD_CLEAR_RX_DTOG(USBx, ep->num);
PCD_CLEAR_TX_DTOG(USBx, ep->num);
if (ep->type != EP_TYPE_ISOC)
{
/* Configure NAK status for the Endpoint */
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_NAK);
}
else
{
/* Configure TX Endpoint to disabled state */
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
}
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_DIS);
}
}
return ret;
}
/**
* @brief De-activate and de-initialize an endpoint
* @param USBx Selected device
* @param ep pointer to endpoint structure
* @retval HAL status
*/
HAL_StatusTypeDef USB_DeactivateEndpoint(USB_TypeDef *USBx, USB_EPTypeDef *ep)
{
if (ep->doublebuffer == 0U)
{
if (ep->is_in != 0U)
{
PCD_CLEAR_TX_DTOG(USBx, ep->num);
/* Configure DISABLE status for the Endpoint*/
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
}
else
{
PCD_CLEAR_RX_DTOG(USBx, ep->num);
/* Configure DISABLE status for the Endpoint*/
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_DIS);
}
}
/*Double Buffer*/
else
{
if (ep->is_in == 0U)
{
/* Clear the data toggle bits for the endpoint IN/OUT*/
PCD_CLEAR_RX_DTOG(USBx, ep->num);
PCD_CLEAR_TX_DTOG(USBx, ep->num);
/* Reset value of the data toggle bits for the endpoint out*/
PCD_TX_DTOG(USBx, ep->num);
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_DIS);
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
}
else
{
/* Clear the data toggle bits for the endpoint IN/OUT*/
PCD_CLEAR_RX_DTOG(USBx, ep->num);
PCD_CLEAR_TX_DTOG(USBx, ep->num);
PCD_RX_DTOG(USBx, ep->num);
/* Configure DISABLE status for the Endpoint*/
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_DIS);
}
}
return HAL_OK;
}
/**
* @brief USB_EPStartXfer setup and starts a transfer over an EP
* @param USBx Selected device
* @param ep pointer to endpoint structure
* @retval HAL status
*/
HAL_StatusTypeDef USB_EPStartXfer(USB_TypeDef *USBx, USB_EPTypeDef *ep)
{
uint32_t len;
uint16_t pmabuffer;
uint16_t wEPVal;
/* IN endpoint */
if (ep->is_in == 1U)
{
/*Multi packet transfer*/
if (ep->xfer_len > ep->maxpacket)
{
len = ep->maxpacket;
}
else
{
len = ep->xfer_len;
}
/* configure and validate Tx endpoint */
if (ep->doublebuffer == 0U)
{
USB_WritePMA(USBx, ep->xfer_buff, ep->pmaadress, (uint16_t)len);
PCD_SET_EP_TX_CNT(USBx, ep->num, len);
}
else
{
/* double buffer bulk management */
if (ep->type == EP_TYPE_BULK)
{
if (ep->xfer_len_db > ep->maxpacket)
{
/* enable double buffer */
PCD_SET_EP_DBUF(USBx, ep->num);
/* each Time to write in PMA xfer_len_db will */
ep->xfer_len_db -= len;
/* Fill the two first buffer in the Buffer0 & Buffer1 */
if ((PCD_GET_ENDPOINT(USBx, ep->num) & USB_EP_DTOG_TX) != 0U)
{
/* Set the Double buffer counter for pmabuffer1 */
PCD_SET_EP_DBUF1_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr1;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
ep->xfer_buff += len;
if (ep->xfer_len_db > ep->maxpacket)
{
ep->xfer_len_db -= len;
}
else
{
len = ep->xfer_len_db;
ep->xfer_len_db = 0U;
}
/* Set the Double buffer counter for pmabuffer0 */
PCD_SET_EP_DBUF0_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr0;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
}
else
{
/* Set the Double buffer counter for pmabuffer0 */
PCD_SET_EP_DBUF0_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr0;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
ep->xfer_buff += len;
if (ep->xfer_len_db > ep->maxpacket)
{
ep->xfer_len_db -= len;
}
else
{
len = ep->xfer_len_db;
ep->xfer_len_db = 0U;
}
/* Set the Double buffer counter for pmabuffer1 */
PCD_SET_EP_DBUF1_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr1;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
}
}
/* auto Switch to single buffer mode when transfer <Mps no need to manage in double buffer */
else
{
len = ep->xfer_len_db;
/* disable double buffer mode */
PCD_CLEAR_EP_DBUF(USBx, ep->num);
/* Set Tx count with nbre of byte to be transmitted */
PCD_SET_EP_TX_CNT(USBx, ep->num, len);
pmabuffer = ep->pmaaddr0;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
}
}/* end if bulk double buffer */
/* manage isochronous double buffer IN mode */
else
{
/* enable double buffer */
PCD_SET_EP_DBUF(USBx, ep->num);
/* each Time to write in PMA xfer_len_db will */
ep->xfer_len_db -= len;
/* Fill the data buffer */
if ((PCD_GET_ENDPOINT(USBx, ep->num) & USB_EP_DTOG_TX) != 0U)
{
/* Set the Double buffer counter for pmabuffer1 */
PCD_SET_EP_DBUF1_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr1;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
ep->xfer_buff += len;
if (ep->xfer_len_db > ep->maxpacket)
{
ep->xfer_len_db -= len;
}
else
{
len = ep->xfer_len_db;
ep->xfer_len_db = 0U;
}
if (len > 0U)
{
/* Set the Double buffer counter for pmabuffer0 */
PCD_SET_EP_DBUF0_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr0;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
}
}
else
{
/* Set the Double buffer counter for pmabuffer0 */
PCD_SET_EP_DBUF0_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr0;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
ep->xfer_buff += len;
if (ep->xfer_len_db > ep->maxpacket)
{
ep->xfer_len_db -= len;
}
else
{
len = ep->xfer_len_db;
ep->xfer_len_db = 0U;
}
if (len > 0U)
{
/* Set the Double buffer counter for pmabuffer1 */
PCD_SET_EP_DBUF1_CNT(USBx, ep->num, ep->is_in, len);
pmabuffer = ep->pmaaddr1;
/* Write the user buffer to USB PMA */
USB_WritePMA(USBx, ep->xfer_buff, pmabuffer, (uint16_t)len);
}
}
}
}
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_VALID);
}
else /* OUT endpoint */
{
if (ep->doublebuffer == 0U)
{
/* Multi packet transfer */
if (ep->xfer_len > ep->maxpacket)
{
len = ep->maxpacket;
ep->xfer_len -= len;
}
else
{
len = ep->xfer_len;
ep->xfer_len = 0U;
}
/* configure and validate Rx endpoint */
PCD_SET_EP_RX_CNT(USBx, ep->num, len);
}
else
{
/* First Transfer Coming From HAL_PCD_EP_Receive & From ISR */
/* Set the Double buffer counter */
if (ep->type == EP_TYPE_BULK)
{
PCD_SET_EP_DBUF_CNT(USBx, ep->num, ep->is_in, ep->maxpacket);
/* Coming from ISR */
if (ep->xfer_count != 0U)
{
/* update last value to check if there is blocking state */
wEPVal = PCD_GET_ENDPOINT(USBx, ep->num);
/*Blocking State */
if ((((wEPVal & USB_EP_DTOG_RX) != 0U) && ((wEPVal & USB_EP_DTOG_TX) != 0U)) ||
(((wEPVal & USB_EP_DTOG_RX) == 0U) && ((wEPVal & USB_EP_DTOG_TX) == 0U)))
{
PCD_FreeUserBuffer(USBx, ep->num, 0U);
}
}
}
/* iso out double */
else if (ep->type == EP_TYPE_ISOC)
{
/* Multi packet transfer */
if (ep->xfer_len > ep->maxpacket)
{
len = ep->maxpacket;
ep->xfer_len -= len;
}
else
{
len = ep->xfer_len;
ep->xfer_len = 0U;
}
PCD_SET_EP_DBUF_CNT(USBx, ep->num, ep->is_in, len);
}
else
{
return HAL_ERROR;
}
}
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_VALID);
}
return HAL_OK;
}
/**
* @brief USB_EPSetStall set a stall condition over an EP
* @param USBx Selected device
* @param ep pointer to endpoint structure
* @retval HAL status
*/
HAL_StatusTypeDef USB_EPSetStall(USB_TypeDef *USBx, USB_EPTypeDef *ep)
{
if (ep->is_in != 0U)
{
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_STALL);
}
else
{
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_STALL);
}
return HAL_OK;
}
/**
* @brief USB_EPClearStall Clear a stall condition over an EP
* @param USBx Selected device
* @param ep pointer to endpoint structure
* @retval HAL status
*/
HAL_StatusTypeDef USB_EPClearStall(USB_TypeDef *USBx, USB_EPTypeDef *ep)
{
if (ep->doublebuffer == 0U)
{
if (ep->is_in != 0U)
{
PCD_CLEAR_TX_DTOG(USBx, ep->num);
if (ep->type != EP_TYPE_ISOC)
{
/* Configure NAK status for the Endpoint */
PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_NAK);
}
}
else
{
PCD_CLEAR_RX_DTOG(USBx, ep->num);
/* Configure VALID status for the Endpoint */
PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_VALID);
}
}
return HAL_OK;
}
#endif
/**
* @brief USB_StopDevice Stop the usb device mode
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_StopDevice(USB_TypeDef *USBx)
{
/* disable all interrupts and force USB reset */
USBx->CNTR = (uint16_t)USB_CNTR_FRES;
/* clear interrupt status register */
USBx->ISTR = 0U;
/* switch-off device */
USBx->CNTR = (uint16_t)(USB_CNTR_FRES | USB_CNTR_PDWN);
return HAL_OK;
}
/**
* @brief USB_SetDevAddress Stop the usb device mode
* @param USBx Selected device
* @param address new device address to be assigned
* This parameter can be a value from 0 to 255
* @retval HAL status
*/
HAL_StatusTypeDef USB_SetDevAddress(USB_TypeDef *USBx, uint8_t address)
{
if (address == 0U)
{
/* set device address and enable function */
USBx->DADDR = (uint16_t)USB_DADDR_EF;
}
return HAL_OK;
}
/**
* @brief USB_DevConnect Connect the USB device by enabling the pull-up/pull-down
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_DevConnect(USB_TypeDef *USBx)
{
/* Enabling DP Pull-UP bit to Connect internal PU resistor on USB DP line */
USBx->BCDR |= (uint16_t)USB_BCDR_DPPU;
return HAL_OK;
}
/**
* @brief USB_DevDisconnect Disconnect the USB device by disabling the pull-up/pull-down
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_DevDisconnect(USB_TypeDef *USBx)
{
/* Disable DP Pull-Up bit to disconnect the Internal PU resistor on USB DP line */
USBx->BCDR &= (uint16_t)(~(USB_BCDR_DPPU));
return HAL_OK;
}
/**
* @brief USB_ReadInterrupts return the global USB interrupt status
* @param USBx Selected device
* @retval HAL status
*/
uint32_t USB_ReadInterrupts(USB_TypeDef *USBx)
{
uint32_t tmpreg;
tmpreg = USBx->ISTR;
return tmpreg;
}
/**
* @brief USB_ActivateRemoteWakeup : active remote wakeup signalling
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_ActivateRemoteWakeup(USB_TypeDef *USBx)
{
USBx->CNTR |= (uint16_t)USB_CNTR_RESUME;
return HAL_OK;
}
/**
* @brief USB_DeActivateRemoteWakeup de-active remote wakeup signalling
* @param USBx Selected device
* @retval HAL status
*/
HAL_StatusTypeDef USB_DeActivateRemoteWakeup(USB_TypeDef *USBx)
{
USBx->CNTR &= (uint16_t)(~USB_CNTR_RESUME);
return HAL_OK;
}
/**
* @brief Copy a buffer from user memory area to packet memory area (PMA)
* @param USBx USB peripheral instance register address.
* @param pbUsrBuf pointer to user memory area.
* @param wPMABufAddr address into PMA.
* @param wNBytes no. of bytes to be copied.
* @retval None
*/
void USB_WritePMA(USB_TypeDef *USBx, uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
{
uint32_t n = ((uint32_t)wNBytes + 1U) >> 1;
uint32_t BaseAddr = (uint32_t)USBx;
uint32_t i, temp1, temp2;
__IO uint16_t *pdwVal;
uint8_t *pBuf = pbUsrBuf;
pdwVal = (__IO uint16_t *)(BaseAddr + 0x400U + ((uint32_t)wPMABufAddr * PMA_ACCESS));
for (i = n; i != 0U; i--)
{
temp1 = *pBuf;
pBuf++;
temp2 = temp1 | ((uint16_t)((uint16_t) *pBuf << 8));
*pdwVal = (uint16_t)temp2;
pdwVal++;
#if PMA_ACCESS > 1U
pdwVal++;
#endif
pBuf++;
}
}
/**
* @brief Copy data from packet memory area (PMA) to user memory buffer
* @param USBx USB peripheral instance register address.
* @param pbUsrBuf pointer to user memory area.
* @param wPMABufAddr address into PMA.
* @param wNBytes no. of bytes to be copied.
* @retval None
*/
void USB_ReadPMA(USB_TypeDef *USBx, uint8_t *pbUsrBuf, uint16_t wPMABufAddr, uint16_t wNBytes)
{
uint32_t n = (uint32_t)wNBytes >> 1;
uint32_t BaseAddr = (uint32_t)USBx;
uint32_t i, temp;
__IO uint16_t *pdwVal;
uint8_t *pBuf = pbUsrBuf;
pdwVal = (__IO uint16_t *)(BaseAddr + 0x400U + ((uint32_t)wPMABufAddr * PMA_ACCESS));
for (i = n; i != 0U; i--)
{
temp = *(__IO uint16_t *)pdwVal;
pdwVal++;
*pBuf = (uint8_t)((temp >> 0) & 0xFFU);
pBuf++;
*pBuf = (uint8_t)((temp >> 8) & 0xFFU);
pBuf++;
#if PMA_ACCESS > 1U
pdwVal++;
#endif
}
if ((wNBytes % 2U) != 0U)
{
temp = *pdwVal;
*pBuf = (uint8_t)((temp >> 0) & 0xFFU);
}
}
/**
* @}
*/
/**
* @}
*/
#endif /* defined (USB) */
#endif /* defined (HAL_PCD_MODULE_ENABLED) || defined (HAL_HCD_MODULE_ENABLED) */
/**
* @}
*/