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@@ -164,11 +164,10 @@ uint32_t tud_cdc_n_write_flush (uint8_t itf)
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uint8_t const rhport = TUD_OPT_RHPORT;
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- // claim the endpoint first
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- TU_VERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 );
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+ // Claim the endpoint first
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+ TU_VnERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 );
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- // we can be blocked by another write()/write_flush() from other thread.
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- // causing us to attempt to transfer on an busy endpoint.
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+ // Pull data from FIFO
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uint16_t const count = tu_fifo_read_n(&p_cdc->tx_ff, p_cdc->epin_buf, sizeof(p_cdc->epin_buf));
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if ( count && tud_cdc_n_connected(itf) )
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hathach