diff --git a/part14-ethernet/Makefile.gcc b/part14-ethernet/Makefile.gcc
index 3aa7670..674751a 100644
--- a/part14-ethernet/Makefile.gcc
+++ b/part14-ethernet/Makefile.gcc
@@ -1,7 +1,7 @@
 CFILES = $(wildcard *.c lib/*.c kernel/*.c net/*.c)
 SFILES = $(wildcard boot/*.S lib/*.S kernel/*.S)
 OFILES = $(CFILES:.c=.o) $(SFILES:.S=.o)
-GCCFLAGS = -Wall -O2 -ffreestanding -nostdinc -nostdlib -nostartfiles
+GCCFLAGS = -Wall -O2 -ffreestanding -nostdlib -nostartfiles
 GCCPATH = ../../gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf/bin
 
 all: clean kernel8.img
diff --git a/part14-ethernet/lib/spi.c b/part14-ethernet/lib/spi.c
index cf1cdf0..c6b0bd5 100644
--- a/part14-ethernet/lib/spi.c
+++ b/part14-ethernet/lib/spi.c
@@ -1,4 +1,5 @@
 #include "../include/io.h"
+#include "../include/fb.h"
 
 // SPI
 
@@ -83,6 +84,7 @@ void spi_send_recv(unsigned char *sbuffer, unsigned char *rbuffer, unsigned int
     while(!(REGS_SPI0->cs & CS_DONE)) {
         while(REGS_SPI0->cs & CS_RXD) {
             unsigned int r = REGS_SPI0->fifo;
+	    debughex(r);
         }
     }
 
diff --git a/part14-ethernet/net/enc28j60.c b/part14-ethernet/net/enc28j60.c
index 8570ea2..52ba6a5 100644
--- a/part14-ethernet/net/enc28j60.c
+++ b/part14-ethernet/net/enc28j60.c
@@ -191,7 +191,7 @@ static void calibrate(void)
  * Software delay in µs
  *  us: the number of µs to wait
  **/
-__inline void up_udelay(uint32_t us)
+static __inline void up_udelay(uint32_t us)
 {
     volatile uint32_t i;
 
diff --git a/part14-ethernet/net/enc28j60.h b/part14-ethernet/net/enc28j60.h
index eaab987..7c378c0 100644
--- a/part14-ethernet/net/enc28j60.h
+++ b/part14-ethernet/net/enc28j60.h
@@ -811,6 +811,6 @@ void ENC_GetPkcnt(ENC_HandleTypeDef *handle);
  *
  ****************************************************************************/
 
-__inline void up_udelay(uint32_t us);
+//__inline void up_udelay(uint32_t us);
 
 #endif /* ENC28J60_H_INCLUDED */