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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/porting.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/porting.md b/docs/porting.md index ccafa7999..7cc890bdc 100644 --- a/docs/porting.md +++ b/docs/porting.md @@ -62,6 +62,8 @@ All of the code for the low-level device API is in `src/portable/<vendor>/<chip ##### dcd_init Initializes the USB peripheral for device mode and enables it. +This function should leave an internal D+/D- pull-up in its default power-on state. `dcd_connect` will be called by the USBD core following `dcd_init`. + #### dcd_int_enable / dcd_int_disable Enables or disables the USB device interrupt(s). May be used to prevent concurrency issues when mutating data structures shared between main code and the interrupt handler. @@ -77,6 +79,10 @@ Called when the device received SET_CONFIG request, you can leave this empty if ##### dcd_remote_wakeup Called to remote wake up host when suspended (e.g hid keyboard) +##### dcd_connect / dcd_disconnect + +Connect or disconnect the data-line pull-up resistor. Define only if MCU has an internal pull-up. (BSP may define for MCU without internal pull-up.) + #### Special events You must let TinyUSB know when certain events occur so that it can continue its work. There are a few methods you can call to queue events for TinyUSB to process. |