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Merge pull request #911 from thierer/vendor_class_zero_length_transfer

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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
parent ba6babf570 2b9e53772e
commit 63e64f374b
1 changed files with 14 additions and 2 deletions
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16
src/class/vendor/vendor_device.c vendored
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@@ -36,6 +36,8 @@
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF // MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+ //--------------------------------------------------------------------+
#define BULK_PACKET_SIZE (TUD_OPT_HIGH_SPEED ? 512 : 64)
typedef struct typedef struct
{ {
uint8_t itf_num; 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) bool vendord_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes)
{ {
(void) rhport;
(void) result; (void) result;
uint8_t itf = 0; 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); if (tud_vendor_tx_cb) tud_vendor_tx_cb(itf, (uint16_t) xferred_bytes);
// Send complete, try to send more if possible // 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; return true;