lib/main/STM32_USB-FS-Device_Driver/src/usb_sil.c

   1 /**
   2   ******************************************************************************
   3   * @file    usb_sil.c
   4   * @author  MCD Application Team
   5   * @version V4.0.0
   6   * @date    28-August-2012
   7   * @brief   Simplified Interface Layer for Global Initialization and Endpoint
   8   *          Rea/Write operations.
   9   ******************************************************************************
  10   * @attention
  11   *
  12   * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  13   *
  14   * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  15   * You may not use this file except in compliance with the License.
  16   * You may obtain a copy of the License at:
  17   *
  18   *        http://www.st.com/software_license_agreement_liberty_v2
  19   *
  20   * Unless required by applicable law or agreed to in writing, software
  21   * distributed under the License is distributed on an "AS IS" BASIS,
  22   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  23   * See the License for the specific language governing permissions and
  24   * limitations under the License.
  25   *
  26   ******************************************************************************
  27   */
  28
  29
  30 /* Includes ------------------------------------------------------------------*/
  31 #include "usb_lib.h"
  32
  33 /* Private typedef -----------------------------------------------------------*/
  34 /* Private define ------------------------------------------------------------*/
  35 /* Private macro -------------------------------------------------------------*/
  36 /* Private variables ---------------------------------------------------------*/
  37 /* Extern variables ----------------------------------------------------------*/
  38 /* Private function prototypes -----------------------------------------------*/
  39 /* Private functions ---------------------------------------------------------*/
  40
  41 /*******************************************************************************
  42 * Function Name  : USB_SIL_Init
  43 * Description    : Initialize the USB Device IP and the Endpoint 0.
  44 * Input          : None.
  45 * Output         : None.
  46 * Return         : Status.
  47 *******************************************************************************/
  48 uint32_t USB_SIL_Init(void)
  49 {
  50   /* USB interrupts initialization */
  51   /* clear pending interrupts */
  52   _SetISTR(0);
  53   wInterrupt_Mask = IMR_MSK;
  54   /* set interrupts mask */
  55   _SetCNTR(wInterrupt_Mask);
  56   return 0;
  57 }
  58
  59 /*******************************************************************************
  60 * Function Name  : USB_SIL_Write
  61 * Description    : Write a buffer of data to a selected endpoint.
  62 * Input          : - bEpAddr: The address of the non control endpoint.
  63 *                  - pBufferPointer: The pointer to the buffer of data to be written
  64 *                    to the endpoint.
  65 *                  - wBufferSize: Number of data to be written (in bytes).
  66 * Output         : None.
  67 * Return         : Status.
  68 *******************************************************************************/
  69 uint32_t USB_SIL_Write(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize)
  70 {
  71   /* Use the memory interface function to write to the selected endpoint */
  72   UserToPMABufferCopy(pBufferPointer, GetEPTxAddr(bEpAddr & 0x7F), wBufferSize);
  73
  74   /* Update the data length in the control register */
  75   SetEPTxCount((bEpAddr & 0x7F), wBufferSize);
  76
  77   return 0;
  78 }
  79
  80 /*******************************************************************************
  81 * Function Name  : USB_SIL_Read
  82 * Description    : Write a buffer of data to a selected endpoint.
  83 * Input          : - bEpAddr: The address of the non control endpoint.
  84 *                  - pBufferPointer: The pointer to which will be saved the
  85 *                     received data buffer.
  86 * Output         : None.
  87 * Return         : Number of received data (in Bytes).
  88 *******************************************************************************/
  89 uint32_t USB_SIL_Read(uint8_t bEpAddr, uint8_t* pBufferPointer)
  90 {
  91   uint32_t DataLength = 0;
  92
  93   /* Get the number of received data on the selected Endpoint */
  94   DataLength = GetEPRxCount(bEpAddr & 0x7F);
  95
  96   /* Use the memory interface function to write to the selected endpoint */
  97   PMAToUserBufferCopy(pBufferPointer, GetEPRxAddr(bEpAddr & 0x7F), DataLength);
  98
  99   /* Return the number of received data */
 100   return DataLength;
 101 }
 102
 103 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/