mirror/tinyusb
1
0
Fork 0
mirror of https://github.com/hathach/tinyusb.git synced 2025-03-14 04:18:56 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #911 from thierer/vendor_class_zero_length_transfer

Browse Source 
Enable empty transfers for tud_vendor_n_write()
This commit is contained in:
HiFiPhile 2024-05-09 16:56:31 +02:00 committed by GitHub
commit 63e64f374b
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/class/vendor/vendor_device.c vendored
View File

@ -36,6 +36,8 @@
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
#define BULK_PACKET_SIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
typedef struct
{
uint8_t itf_num;
@ -273,7 +275,6 @@ uint16_t vendord_open(uint8_t rhport, tusb_desc_interface_t const * desc_itf, ui
bool vendord_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes)
{
(void) rhport;
(void) result;
uint8_t itf = 0;
@ -300,7 +301,18 @@ bool vendord_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint
{
if (tud_vendor_tx_cb) tud_vendor_tx_cb(itf, (uint16_t) xferred_bytes);
// Send complete, try to send more if possible
tud_vendor_n_write_flush(itf);
if ( 0 == tud_vendor_n_write_flush(itf) )
{
// If there is no data left, a ZLP should be sent if
// xferred_bytes is multiple of EP Packet size and not zero
if ( !tu_fifo_count(&p_itf->tx_ff) && xferred_bytes && (0 == (xferred_bytes & (BULK_PACKET_SIZE-1))) )
{
if ( usbd_edpt_claim(rhport, p_itf->ep_in) )
{
usbd_edpt_xfer(rhport, p_itf->ep_in, NULL, 0);
}
}
}
}
return true;