fix ep0 zlp send judgement

2022-02-17 13:32:53 +08:00
parent 97a80a599c
commit ba3fceeb87
1 changed files with 1 additions and 1 deletions
--- a/core/usbd_core.c
+++ b/core/usbd_core.c
@@ -982,7 +982,7 @@ static void usbd_send_to_host(uint16_t len)
         * last chunk is wMaxPacketSize long, to indicate the last
         * packet.
         */
-        if ((!usbd_core_cfg.ep0_data_buf_residue) && (usbd_core_cfg.ep0_data_buf_len >= USB_CTRL_EP_MPS) && !(usbd_core_cfg.ep0_data_buf_len % USB_CTRL_EP_MPS)) {
+        if(!usbd_core_cfg.ep0_data_buf_residue && (len > usbd_core_cfg.ep0_data_buf_len) && !(usbd_core_cfg.ep0_data_buf_len % USB_CTRL_EP_MPS)){
            /* Transfers a zero-length packet next*/
            usbd_core_cfg.zlp_flag = true;
        }