From 410e4173b163296645e1d6f9a4b475c2070b806a Mon Sep 17 00:00:00 2001
From: cyliangtw <cyliang@nuvoton.com>
Date: Mon, 9 Dec 2019 18:12:26 +0800
Subject: [PATCH] Limit max of M487 EMAC RX frame len as 1518

---
 .../emac-drivers/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/features/netsocket/emac-drivers/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c b/features/netsocket/emac-drivers/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c
index 64930643267..5bb093237c3 100644
--- a/features/netsocket/emac-drivers/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c
+++ b/features/netsocket/emac-drivers/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c
@@ -262,6 +262,8 @@ void numaker_eth_init(uint8_t *mac_addr)
                     EMAC_CAMCTL_ABP_Msk;
     EMAC->CAMEN = 1;    // Enable CAM entry 0    
 
+    /* Limit the max receive frame length to 1514 + 4 */
+    EMAC->MRFL = 1518;    
     reset_phy();                    
                     
     EMAC_ENABLE_RX();