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Add functionality to abort an ongoing transfer

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This commit is contained in:
Jan Dümpelmann 2020-09-04 15:40:23 +02:00
parent 4071e490e2
commit 9cc22b635c
4 changed files with 43 additions and 0 deletions
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10
src/class/cdc/cdc_device.c
View File

@ -353,6 +353,16 @@ bool cdcd_control_request(uint8_t rhport, tusb_control_request_t const * request
bool const dtr = tu_bit_test(request->wValue, 0);
bool const rts = tu_bit_test(request->wValue, 1);
#if CFG_TUD_CDC_CLEAR_AT_CONNECTION
// DTE connected event (if DTE supports DTR bit)
if ( dtr && !tu_bit_test(p_cdc->line_state, 0) )
{
// Clear not transmitted data
usbd_edpt_xfer_abort(rhport, p_cdc->ep_in);
tu_fifo_clear(&p_cdc->tx_ff);
}
#endif
p_cdc->line_state = (uint8_t) request->wValue;
// Disable fifo overwriting if DTR bit is set

3
src/device/dcd.h
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@ -133,6 +133,9 @@ void dcd_edpt_close (uint8_t rhport, uint8_t ep_addr) TU_ATTR_WEAK;
// Submit a transfer, When complete dcd_event_xfer_complete() is invoked to notify the stack
bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes);
// Abort a ongoing transfer
TU_ATTR_WEAK bool dcd_edpt_xfer_abort(uint8_t rhport, uint8_t ep_addr);
// Stall endpoint
void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr);

27
src/device/usbd.c
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@ -1100,6 +1100,33 @@ bool usbd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
}
}
bool usbd_edpt_xfer_abort(uint8_t rhport, uint8_t ep_addr)
{
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
TU_LOG2(" Abort XFER EP %02X ... ", ep_addr);
// Abort API is optional for DCD
if ( dcd_edpt_xfer_abort )
{
if ( dcd_edpt_xfer_abort(rhport, ep_addr) )
{
_usbd_dev.ep_status[epnum][dir].busy = false;
TU_LOG2("OK\r\n");
return true;
}else
{
TU_LOG2("failed\r\n");
return false;
}
}else
{
TU_LOG2("no DCD support\r\n");
return false;
}
}
bool usbd_edpt_busy(uint8_t rhport, uint8_t ep_addr)
{
(void) rhport;

3
src/device/usbd_pvt.h
View File

@ -70,6 +70,9 @@ void usbd_edpt_close(uint8_t rhport, uint8_t ep_addr);
// Submit a usb transfer
bool usbd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes);
// Abort a scheduled transfer
bool usbd_edpt_xfer_abort(uint8_t rhport, uint8_t ep_addr);
// Check if endpoint transferring is complete
bool usbd_edpt_busy(uint8_t rhport, uint8_t ep_addr);