From 1e3c2faed4db782f093aa4c88fc98fa81cccc77a Mon Sep 17 00:00:00 2001
From: Mike Ajax <14773392+michaelajax@users.noreply.github.com>
Date: Sun, 30 Aug 2026 09:44:23 -0700
Subject: Add "attached" state callback for UCPD

---
 src/typec/usbc.c | 10 +++++++++-
 src/typec/usbc.h |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/typec/usbc.c b/src/typec/usbc.c
index dc59b35be..ab7dd0b92 100644
--- a/src/typec/usbc.c
+++ b/src/typec/usbc.c
@@ -57,6 +57,11 @@ TU_ATTR_WEAK bool tuc_pd_control_received_cb(uint8_t rhport, pd_header_t const*
   return false;
 }
 
+TU_ATTR_WEAK void tuc_attach_changed_cb(uint8_t rhport, bool attached) {
+  (void) rhport;
+  (void) attached;
+}
+
 TU_ATTR_WEAK void tcd_connect(uint8_t rhport) {
   (void) rhport;
 }
@@ -124,8 +129,11 @@ void tuc_task_ext(uint32_t timeout_ms, bool in_isr) {
     if (!osal_queue_receive(_usbc_q, &event, timeout_ms)) return;
 
     switch (event.event_id) {
-      case TCD_EVENT_CC_CHANGED:
+      case TCD_EVENT_CC_CHANGED: {
+        bool const attached = event.cc_changed.cc_state[0] != 0 || event.cc_changed.cc_state[1] != 0;
+        tuc_attach_changed_cb(event.rhport, attached);
         break;
+      }
 
       case TCD_EVENT_RX_COMPLETE:
         // TODO process message here in ISR, move to thread later
diff --git a/src/typec/usbc.h b/src/typec/usbc.h
index 9fca7da0d..fc4773b07 100644
--- a/src/typec/usbc.h
+++ b/src/typec/usbc.h
@@ -65,6 +65,7 @@ extern void tcd_int_handler(uint8_t rhport);
 
 bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t const* dobj, uint8_t const* p_end);
 bool tuc_pd_control_received_cb(uint8_t rhport, pd_header_t const* header);
+void tuc_attach_changed_cb(uint8_t rhport, bool attached);
 
 //--------------------------------------------------------------------+
 //
-- 
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