History: usbd_cd_cdc_acm

This page describes all changes made to the usbd_cd_cdc_acm package, USBD CDC-ACM Class Driver, since its release.

Version

5.5 (2020-05-12, 17:25):

  • Receive buffer base addresses were wrongly calculated if multiple CDC-ACM lines were defined. As a result data could get mixed up between the different channels.

5.4 (2018-08-27, 16:30):

  • Static analysis issues eliminated.

5.3r2 (2018-08-29, 18:14):

  • Document HTML link added to the documentation folder.
  • History and document files renamed to the package name.

5.3 (2017-09-22, 13:51):

  • usbd_cdcacm_send() returns USBD_CDCACM_BUSY if busy instead of USBD_CDCACM_ERROR.

5.2:

  • Line number parameter is checked to prevent buffer indexing error.

5.1:

  •  usbd_cdcacm_get_control_line_state() introduced instead of usbd_cdcacm_get_dtr(); the new function can also return the state of RTS.
  •  USBD_CDCACM_NTF_SET_CONTROL_LINE_STATE notification function introduced which gets called if the host sets the control line state.

4.2:

  • Mutex released before calling Rx and Tx notifications in order to support initiating new reception/transmission from user callback.
  • Multiple DISCONNECT notifications eliminated.

4.1:

  • Module renamed to usbd_cdcacm (original name: usbd_cdcser).
  • Functionality reworked: one event used inside the module; new API.

3.12:

  • Line number parameter added to cdcserd_send_brk() function.

3.11:

  • Added new API functions cdcserd_receive_buf(), cdcserd_receive_buf_status() to support reception directly into a user buffer.
  • Rx transfers addressed to the internal CDC buffer are always started with length=psize instead of length=bufsize.
  • Removed needless usbd_cdcser.h.

3.10:

  •  cdcserd_init() resources release sequence fixed in case of error.

3.9:  

  •  RX_BUFFER_SIZE renamed to CDC_RX_BUFFER_SIZE and moved to the config file.

3.8:

  •  cdcserd_send() incorrectly cleared RX task ID instead TX task ID after getting the configured event.

3.7:

  • Removed debug code.
  • Added a flag to indicate valid taskid.
  • Added mutex protection for the taskid flag.

3.6:

  • Added interface function cdcserd_wait_rx_chars() to make the driver able to wait for received characters with a timeout.

3.5:

  •  cdcserd_receive() will start a blocking transfer in case of RTOS.

3.4:

  • LS_BRAK corrected to LS_BREAK in api_usbd_cdcser.h.

3.3:

  • USBD_INVALID_IFC_NDX used instead of (uint8_t)-1.

3.2:

  • Resources incorrectly freed in case of failure at at initialization.

3.1:

  • Some typecasts were changed to avoid warnings.