diff --git a/src/libboard_artiq/src/cxp_proto.rs b/src/libboard_artiq/src/cxp_proto.rs
index b3b41a0..815d041 100644
--- a/src/libboard_artiq/src/cxp_proto.rs
+++ b/src/libboard_artiq/src/cxp_proto.rs
@@ -192,17 +192,18 @@ pub fn print_packet(pak: &[u8]) {
     println!("============================================");
 }
 
-pub fn print_packetu32(pak: &[u32]) {
+pub fn print_packetu32(pak: &[u32], k: &[u8]) {
     println!("pak = [");
     for i in 0..(pak.len()) {
         let data: [u8; 4] = pak[i].to_be_bytes();
         println!(
-            "{:#03}     {:#04X} {:#04X} {:#04X} {:#04X},",
+            "{:#03}     {:#04X} {:#04X} {:#04X} {:#04X} | K {:04b},",
             i + 1,
             data[0],
             data[1],
             data[2],
-            data[3]
+            data[3],
+            k[i],
         )
     }
     println!("]");
@@ -216,6 +217,7 @@ pub fn downconn_debug_send(packet: &Packet) -> Result<(), Error> {
     packet.write_to(&mut writer)?;
 
     unsafe {
+        csr::cxp::downconn_mux_sel_write(0);
         let len = writer.position();
         csr::cxp::downconn_debug_src_len_write(len as u8);
         for data in writer.get_ref()[..len].iter() {
@@ -227,3 +229,10 @@ pub fn downconn_debug_send(packet: &Packet) -> Result<(), Error> {
 
     Ok(())
 }
+
+pub fn downconn_debug_send_trig_ack() {
+    unsafe {
+        csr::cxp::downconn_mux_sel_write(1);
+        csr::cxp::downconn_ack_write(1);
+    }
+}