From 2989155f0567df45f9eca6cf644b7b2523f9fcbd Mon Sep 17 00:00:00 2001
From: Arne <arne@rnae.de>
Date: Fri, 18 Aug 2023 15:47:01 +0200
Subject: [PATCH] handle rdm dmx address changes

---
 wled00/dmx_input.cpp | 19 +++++++++++++++++++
 wled00/dmx_input.h   |  5 +++++
 2 files changed, 24 insertions(+)

diff --git a/wled00/dmx_input.cpp b/wled00/dmx_input.cpp
index b60f56cdd..3cb9090b2 100644
--- a/wled00/dmx_input.cpp
+++ b/wled00/dmx_input.cpp
@@ -9,6 +9,24 @@
 #include "dmx_input.h"
 #include <rdm/responder.h>
 
+void rdmAddressChangedCb(dmx_port_t dmxPort, const rdm_header_t *header,
+                         void *context)
+{
+  DMXInput *dmx = static_cast<DMXInput *>(context);
+
+  if (!dmx)
+  {
+    USER_PRINTLN("DMX: Error: no context in rdmAddressChangedCb");
+    return;
+  }
+
+  if (header->cc == RDM_CC_SET_COMMAND_RESPONSE)
+  {
+    const uint16_t addr = dmx_get_start_address(dmx->inputPortNum);
+    DMXAddress = std::min(512, int(addr));
+    USER_PRINTF("DMX start addr changed to: %d\n", DMXAddress);
+  }
+}
 
 dmx_config_t DMXInput::createConfig() const
 {
@@ -104,6 +122,7 @@ void DMXInput::init(uint8_t rxPin, uint8_t txPin, uint8_t enPin, uint8_t inputPo
     USER_PRINTF("DMX enable pin is: %u\n", enPin);
     dmx_set_pin(inputPortNum, txPin, rxPin, enPin);
 
+    rdm_register_dmx_start_address(inputPortNum, rdmAddressChangedCb, this);
     initialized = true;
   }
   else
diff --git a/wled00/dmx_input.h b/wled00/dmx_input.h
index 88b1755c1..df6c31d6f 100644
--- a/wled00/dmx_input.h
+++ b/wled00/dmx_input.h
@@ -29,6 +29,11 @@ private:
   void turnOnAllLeds();
 
   dmx_config_t createConfig() const;
+
+  //is invoked whenver the dmx start address is changed via rdm
+  friend void rdmAddressChangedCb(dmx_port_t dmxPort, const rdm_header_t *header,
+                                  void *context);
+
   uint8_t inputPortNum = 255; // TODO make this configurable
   /// True once the dmx input has been initialized successfully
   bool initialized = false; // true once init finished successfully