diff --git a/src/libboard_artiq/src/cxp_proto.rs b/src/libboard_artiq/src/cxp_proto.rs
index 141bb0e..a51995f 100644
--- a/src/libboard_artiq/src/cxp_proto.rs
+++ b/src/libboard_artiq/src/cxp_proto.rs
@@ -1,10 +1,12 @@
+use core::slice;
+
 use core_io::{Error as IoError, Write};
 use crc::crc32;
 use embedded_hal::prelude::_embedded_hal_blocking_delay_DelayUs;
 use io::Cursor;
 use libboard_zynq::{println, timer::GlobalTimer};
 
-use crate::pl::csr;
+use crate::{mem::mem::CXP_MEM, pl::csr};
 
 const MAX_PACKET: usize = 128;
 const DATA_MAXSIZE: usize = /*max size*/MAX_PACKET - /*Tag*/4 - /*Op code & length*/4 - /*addr*/4 - /*CRC*/4 ;
@@ -243,3 +245,37 @@ pub fn downconn_send_test_packet() {
         while csr::cxp::downconn_testseq_busy_read() == 1 {}
     }
 }
+
+pub fn ram_writer_send(packet: &Packet) -> Result<(), Error> {
+    unsafe {
+        // TODO: put this in mem group
+        while csr::cxp::transmitter_cxp_tx_read() == 1 {}
+        let ptr = CXP_MEM[0].base as *mut u32;
+        let mut writer = Cursor::new(slice::from_raw_parts_mut(ptr as *mut u8, 0x200 as usize));
+
+        packet.write_to(&mut writer)?;
+
+        csr::cxp::transmitter_cxp_tx_word_len_write(writer.position() as u8 / 4);
+        csr::cxp::transmitter_cxp_tx_write(1);
+        while csr::cxp::transmitter_cxp_tx_read() == 1 {}
+
+        // read the fifo
+        const LEN: usize = 10;
+        let mut pak_arr: [u32; LEN] = [0; LEN];
+        let mut k_arr: [u8; LEN] = [0; LEN];
+        let mut i: usize = 0;
+        while csr::cxp::transmitter_debug_out_dout_valid_read() == 1 {
+            pak_arr[i] = csr::cxp::transmitter_debug_out_dout_pak_read();
+            k_arr[i] = csr::cxp::transmitter_debug_out_kout_pak_read();
+            // println!("received {:#04X}", pak_arr[i]);
+            csr::cxp::transmitter_debug_out_inc_write(1);
+            i += 1;
+            if i == LEN {
+                break;
+            }
+        }
+        print_packetu32(&pak_arr, &k_arr);
+    }
+
+    Ok(())
+}