From d970f88f065249d3e6c73ed87935ba035cb81a82 Mon Sep 17 00:00:00 2001
From: sakimisu <1203593632@qq.com>
Date: Wed, 21 Jun 2023 19:39:48 +0800
Subject: [PATCH] add cdc send break request

---
 class/cdc/usbd_cdc.c | 21 +++++++++++----------
 class/cdc/usbd_cdc.h |  1 +
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/class/cdc/usbd_cdc.c b/class/cdc/usbd_cdc.c
index e3e310f3..e9cbb503 100644
--- a/class/cdc/usbd_cdc.c
+++ b/class/cdc/usbd_cdc.c
@@ -48,15 +48,10 @@ static int cdc_acm_class_interface_request_handler(struct usb_setup_packet *setu
                         parity_name[line_coding.bParityType],
                         stop_name[line_coding.bCharFormat]);
 
-            /* check if current line coding is the same with last, if they are the same, do not set line coding */
-            usbd_cdc_acm_get_line_coding(intf_num, &line_coding_last);
-            if (memcmp(&line_coding_last, &line_coding, sizeof(struct cdc_line_coding))) {
-                usbd_cdc_acm_set_line_coding(intf_num, &line_coding);
-            }
-
+            usbd_cdc_acm_set_line_coding(intf_num, &line_coding);
             break;
 
-        case CDC_REQUEST_SET_CONTROL_LINE_STATE: {
+        case CDC_REQUEST_SET_CONTROL_LINE_STATE:
             dtr = (setup->wValue & 0x0001);
             rts = (setup->wValue & 0x0002);
             USB_LOG_DBG("Set intf:%d DTR 0x%x,RTS 0x%x\r\n",
@@ -65,7 +60,7 @@ static int cdc_acm_class_interface_request_handler(struct usb_setup_packet *setu
                         rts);
             usbd_cdc_acm_set_dtr(intf_num, dtr);
             usbd_cdc_acm_set_rts(intf_num, rts);
-        } break;
+            break;
 
         case CDC_REQUEST_GET_LINE_CODING:
             usbd_cdc_acm_get_line_coding(intf_num, &line_coding);
@@ -78,7 +73,9 @@ static int cdc_acm_class_interface_request_handler(struct usb_setup_packet *setu
                         line_coding.bParityType,
                         line_coding.bDataBits);
             break;
-
+        case CDC_REQUEST_SEND_BREAK:
+            usbd_cdc_acm_send_break(intf_num);
+            break;
         default:
             USB_LOG_WRN("Unhandled CDC Class bRequest 0x%02x\r\n", setup->bRequest);
             return -1;
@@ -115,4 +112,8 @@ __WEAK void usbd_cdc_acm_set_dtr(uint8_t intf, bool dtr)
 
 __WEAK void usbd_cdc_acm_set_rts(uint8_t intf, bool rts)
 {
-}
\ No newline at end of file
+}
+
+__WEAK void usbd_cdc_acm_send_break(uint8_t intf)
+{
+}
diff --git a/class/cdc/usbd_cdc.h b/class/cdc/usbd_cdc.h
index b4f5d993..90e08f4a 100644
--- a/class/cdc/usbd_cdc.h
+++ b/class/cdc/usbd_cdc.h
@@ -20,6 +20,7 @@ void usbd_cdc_acm_set_line_coding(uint8_t intf, struct cdc_line_coding *line_cod
 void usbd_cdc_acm_get_line_coding(uint8_t intf, struct cdc_line_coding *line_coding);
 void usbd_cdc_acm_set_dtr(uint8_t intf, bool dtr);
 void usbd_cdc_acm_set_rts(uint8_t intf, bool rts);
+void usbd_cdc_acm_send_break(uint8_t intf);
 
 #ifdef __cplusplus
 }