diff --git a/software/libcariboulite/src/app_menu.c b/software/libcariboulite/src/app_menu.c
index 816872e..0447aa8 100644
--- a/software/libcariboulite/src/app_menu.c
+++ b/software/libcariboulite/src/app_menu.c
@@ -187,7 +187,11 @@ static void fpga_smi_fifo(sys_st *sys)
     uint8_t *val = (uint8_t *)&status;
 	caribou_fpga_get_smi_ctrl_fifo_status (&sys->fpga, &status);
 	
-	printf("	FPGA SMI info (%02X): RX_FIFO_EMPTY: %d, CHANNEL: %d\n", *val, status.rx_fifo_empty, status.smi_channel);
+	printf("    FPGA SMI info (%02X):\n", *val);
+    printf("        RX FIFO EMPTY: %d\n", status.rx_fifo_empty);
+    printf("        TX FIFO FULL: %d\n", status.tx_fifo_full);
+    printf("        RX CHANNEL: %d\n", status.smi_channel);
+    printf("        RX SMI TEST: %d\n", status.i_smi_test);
 }
 
 //=================================================
diff --git a/software/libcariboulite/src/caribou_fpga/caribou_fpga.h b/software/libcariboulite/src/caribou_fpga/caribou_fpga.h
index b3cee40..80877d6 100644
--- a/software/libcariboulite/src/caribou_fpga/caribou_fpga.h
+++ b/software/libcariboulite/src/caribou_fpga/caribou_fpga.h
@@ -83,8 +83,10 @@ typedef struct
 typedef struct
 {
     uint8_t rx_fifo_empty : 1;       // LSB
+    uint8_t tx_fifo_full : 1;
     uint8_t smi_channel: 1;
-    uint8_t reserved : 6;            // MSB
+    uint8_t i_smi_test : 1;
+    uint8_t reserved : 4;            // MSB
 } caribou_fpga_smi_fifo_status_st;
 
 /**
diff --git a/software/libcariboulite/src/cariboulite_radio.h b/software/libcariboulite/src/cariboulite_radio.h
index a2838c4..681aa81 100644
--- a/software/libcariboulite/src/cariboulite_radio.h
+++ b/software/libcariboulite/src/cariboulite_radio.h
@@ -506,6 +506,14 @@ int cariboulite_radio_write_samples(cariboulite_radio_state_st* radio,
                             caribou_smi_sample_complex_int16* buffer,
                             size_t length);  
 
+/**
+ * @brief Get Native Chunk (MTU)
+ *
+ * Gets the SMI IO native chunk size (MTU) in units of samples (4 bytes each)
+ *
+ * @param radio a pre-allocated radio state structure
+ * @return the number of samples in an native sized chunk
+ */
 size_t cariboulite_radio_get_native_mtu_size_samples(cariboulite_radio_state_st* radio);
 
 #ifdef __cplusplus