diff --git a/src/libboard_artiq/src/cxp_upconn.rs b/src/libboard_artiq/src/cxp_upconn.rs
index 63ce128..ca34648 100644
--- a/src/libboard_artiq/src/cxp_upconn.rs
+++ b/src/libboard_artiq/src/cxp_upconn.rs
@@ -3,6 +3,37 @@ use libboard_zynq::{println, timer::GlobalTimer};
 
 use crate::pl::csr;
 
+pub fn trigger_ack_test(timer: &mut GlobalTimer) {
+    const LEN: usize = 4 * 8;
+    let mut pak_arr: [u8; LEN] = [0; LEN];
+
+    unsafe {
+        csr::cxp::txtrig_ack_write(1); // send IO ack 
+
+        let mut i: usize = 0;
+        while csr::cxp::txtrig_dout_valid_read() == 1 {
+            pak_arr[i] = csr::cxp::txtrig_dout_pak_read();
+            // println!("received {:#04X}", pak_arr[i]);
+            csr::cxp::txtrig_inc_write(1);
+            i += 1;
+        }
+
+        println!("arr = [");
+        for i in 0..(LEN / 4) {
+            println!(
+                "{:#03}     {:#04X} {:#04X} {:#04X} {:#04X},",
+                i + 1,
+                pak_arr[i * 4],
+                pak_arr[i * 4 + 1],
+                pak_arr[i * 4 + 2],
+                pak_arr[i * 4 + 3]
+            )
+        }
+        println!("]");
+        println!("============================================");
+    }
+}
+
 pub fn pipeline_test(timer: &mut GlobalTimer) {
     let arr = [
         // 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08
@@ -24,10 +55,13 @@ pub fn pipeline_test(timer: &mut GlobalTimer) {
             csr::cxp::txcore_din_pak_write(*a);
         }
 
+        // wait for pipelining
+        timer.delay_us(1);
+
         let mut i: usize = 0;
         while csr::cxp::txcore_dout_valid_read() == 1 {
             pak_arr[i] = csr::cxp::txcore_dout_pak_read();
-            println!("received {:#04X}", pak_arr[i]);
+            // println!("received {:#04X}", pak_arr[i]);
             csr::cxp::txcore_inc_write(1);
             i += 1;
         }
@@ -35,14 +69,16 @@ pub fn pipeline_test(timer: &mut GlobalTimer) {
         println!("arr = [");
         for i in 0..(LEN / 4) {
             println!(
-                "     {:#04X} {:#04X} {:#04X} {:#04X},",
+                "{:#03}     {:#04X} {:#04X} {:#04X} {:#04X},",
+                i + 1,
                 pak_arr[i * 4],
                 pak_arr[i * 4 + 1],
                 pak_arr[i * 4 + 2],
                 pak_arr[i * 4 + 3]
             )
         }
-        println!("]")
+        println!("]");
+        println!("============================================");
     }
 }
 
@@ -95,6 +131,7 @@ pub fn tx_test(timer: &mut GlobalTimer) {
                 )
             }
             println!("]");
+            println!("============================================");
             timer.delay_us(2_000_000);
         }
     }