From 07a04255da4442fb0790130ac65c648d0884255a Mon Sep 17 00:00:00 2001
From: amit verma <amit@hpslabdesigns.com>
Date: Thu, 25 Feb 2021 23:13:21 +0530
Subject: [PATCH] initial break request handling

---
 src/class/cdc/cdc_device.c | 11 +++++++++++
 src/class/cdc/cdc_device.h |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c
index 58f485a5d..5a74b4876 100644
--- a/src/class/cdc/cdc_device.c
+++ b/src/class/cdc/cdc_device.c
@@ -396,6 +396,17 @@ bool cdcd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t
         if ( tud_cdc_line_state_cb ) tud_cdc_line_state_cb(itf, dtr, rts);
       }
     break;
+    case CDC_REQUEST_SEND_BREAK:
+      if (stage == CONTROL_STAGE_SETUP)
+      {
+        tud_control_status(rhport, request);
+      }
+      else if (stage == CONTROL_STAGE_ACK)
+      {
+        TU_LOG2("  Send Break\r\n");
+        if ( tud_cdc_send_break_cb ) tud_cdc_send_break_cb(itf, request->wValue);
+      }
+    break;
 
     default: return false; // stall unsupported request
   }
diff --git a/src/class/cdc/cdc_device.h b/src/class/cdc/cdc_device.h
index 62dcd3c0a..d10fe68db 100644
--- a/src/class/cdc/cdc_device.h
+++ b/src/class/cdc/cdc_device.h
@@ -133,6 +133,9 @@ static inline bool     tud_cdc_write_clear     (void);
 // Invoked when received new data
 TU_ATTR_WEAK void tud_cdc_rx_cb(uint8_t itf);
 
+// Invoked when received send break
+TU_ATTR_WEAK void tud_cdc_send_break_cb(uint8_t itf, uint16_t wait_ms);
+
 // Invoked when received `wanted_char`
 TU_ATTR_WEAK void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char);