NXP LPC1768 Ethernet driver for lwip and CMSIS-RTOS

Dependents:   EthernetInterface EthernetInterface EthernetInterface_RSF EthernetInterface ... more

Legacy Networking Libraries

This is an mbed 2 networking library. For mbed 5, the networking libraries have been revised to better support additional network stacks and thread safety here.

This library is based on the code of the NXP LPC port of the Lightweight TCP/IP Stack

Copyright(C) 2011, NXP Semiconductor
All rights reserved.

Software that is described herein is for illustrative purposes only
which provides customers with programming information regarding the
products. This software is supplied "AS IS" without any warranties.
NXP Semiconductors assumes no responsibility or liability for the
use of the software, conveys no license or title under any patent,
copyright, or mask work right to the product. NXP Semiconductors
reserves the right to make changes in the software without
notification. NXP Semiconductors also make no representation or
warranty that such application will be suitable for the specified
use without further testing or modification.
Revision:
22:fa7e1e2c6eb3
Child:
23:1283021a4a74
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/TARGET_RZ_A1H/rza1_emac.c	Thu Nov 06 11:00:57 2014 +0000
@@ -0,0 +1,193 @@
+#include "lwip/opt.h"
+#include "lwip/tcpip.h"
+#include "netif/etharp.h"
+#include "mbed_interface.h"
+#include "ethernet_api.h"
+#include "ethernetext_api.h"
+
+#define RECV_TASK_PRI           (osPriorityNormal)
+#define PHY_TASK_PRI            (osPriorityNormal)
+#define PHY_TASK_WAIT           (200)
+
+/* memory */
+static sys_sem_t recv_ready_sem;    /* receive ready semaphore */
+
+/* function */
+static void rza1_recv_task(void *arg);
+static void rza1_phy_task(void *arg);
+static err_t rza1_etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr);
+static err_t rza1_low_level_output(struct netif *netif, struct pbuf *p);
+static void rza1_recv_callback(void);
+
+static void rza1_recv_task(void *arg) {
+    struct netif   *netif = (struct netif*)arg;
+    struct eth_hdr *ethhdr;
+    u16_t          recv_size;
+    struct pbuf    *p;
+    struct pbuf    *q;
+
+    while (1) {
+        sys_arch_sem_wait(&recv_ready_sem, 0);
+        recv_size = ethernet_receive();
+        if (recv_size != 0) {
+            p = pbuf_alloc(PBUF_RAW, recv_size, PBUF_POOL);
+            if (p != NULL) {
+                for (q = p; q != NULL; q = q->next) {
+                    (void)ethernet_read((char *)q->payload, q->len);
+                }
+                ethhdr = p->payload;
+                switch (htons(ethhdr->type)) {
+                    case ETHTYPE_IP:
+                    case ETHTYPE_ARP:
+#if PPPOE_SUPPORT
+                    case ETHTYPE_PPPOEDISC:
+                    case ETHTYPE_PPPOE:
+#endif /* PPPOE_SUPPORT */
+                        /* full packet send to tcpip_thread to process */
+                        if (netif->input(p, netif) != ERR_OK) {
+                            /* Free buffer */
+                            pbuf_free(p);
+                        }
+                        break;
+                    default:
+                        /* Return buffer */
+                        pbuf_free(p);
+                        break;
+                }
+            }
+        }
+    }
+}
+
+static void rza1_phy_task(void *arg) {
+    struct netif *netif = (struct netif*)arg;
+    s32_t        connect_sts = 0;   /* 0: disconnect, 1:connect */
+    s32_t        link_sts;
+    s32_t        link_mode_new;
+    s32_t        link_mode_old = NEGO_FAIL;
+
+    while (1) {
+        link_sts = ethernet_link();
+        if (link_sts == 1) {
+            link_mode_new = ethernetext_chk_link_mode();
+            if (link_mode_new != link_mode_old) {
+                if (connect_sts == 1) {
+                    tcpip_callback_with_block((tcpip_callback_fn)netif_set_link_down, (void*) netif, 1);
+                }
+                if (link_mode_new != NEGO_FAIL) {
+                    ethernetext_set_link_mode(link_mode_new);
+                    tcpip_callback_with_block((tcpip_callback_fn)netif_set_link_up, (void*) netif, 1);
+                    connect_sts = 1;
+                }
+            }
+        } else {
+            if (connect_sts != 0) {
+                tcpip_callback_with_block((tcpip_callback_fn)netif_set_link_down, (void*) netif, 1);
+                link_mode_new = NEGO_FAIL;
+                connect_sts   = 0;
+            }
+        }
+        link_mode_old = link_mode_new;
+        osDelay(PHY_TASK_WAIT);
+    }
+}
+
+static err_t rza1_etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr) {
+    /* Only send packet is link is up */
+    if (netif->flags & NETIF_FLAG_LINK_UP) {
+        return etharp_output(netif, q, ipaddr);
+    }
+
+    return ERR_CONN;
+}
+
+static err_t rza1_low_level_output(struct netif *netif, struct pbuf *p) {
+    struct pbuf *q;
+    s32_t       cnt;
+    err_t       err        = ERR_MEM;
+    s32_t       write_size = 0;
+
+    if ((p->payload != NULL) && (p->len != 0)) {
+        /* If the first data can't be written, transmit descriptor is full. */
+        for (cnt = 0; cnt < 100; cnt++) {
+            write_size = ethernet_write((char *)p->payload, p->len);
+            if (write_size != 0) {
+                break;
+            }
+            osDelay(1);
+        }
+        if (write_size != 0) {
+            for (q = p->next; q != NULL; q = q->next) {
+                (void)ethernet_write((char *)q->payload, q->len);
+            }
+            if (ethernet_send() == 1) {
+                err = ERR_OK;
+            }
+        }
+    }
+    pbuf_free(p);
+
+    return err;
+}
+
+static void rza1_recv_callback(void) {
+    sys_sem_signal(&recv_ready_sem);
+}
+
+err_t eth_arch_enetif_init(struct netif *netif)
+{
+    ethernet_cfg_t ethcfg;
+
+    /* set MAC hardware address */
+#if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
+    netif->hwaddr[0] = MBED_MAC_ADDR_0;
+    netif->hwaddr[1] = MBED_MAC_ADDR_1;
+    netif->hwaddr[2] = MBED_MAC_ADDR_2;
+    netif->hwaddr[3] = MBED_MAC_ADDR_3;
+    netif->hwaddr[4] = MBED_MAC_ADDR_4;
+    netif->hwaddr[5] = MBED_MAC_ADDR_5;
+#else
+    mbed_mac_address((char *)netif->hwaddr);
+#endif
+    netif->hwaddr_len = ETHARP_HWADDR_LEN;
+
+    /* maximum transfer unit */
+    netif->mtu = 1500;
+
+    /* device capabilities */
+    netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP;
+
+#if LWIP_NETIF_HOSTNAME
+    /* Initialize interface hostname */
+    netif->hostname = "lwiprza1";
+#endif /* LWIP_NETIF_HOSTNAME */
+
+    netif->name[0] = 'e';
+    netif->name[1] = 'n';
+
+    netif->output     = rza1_etharp_output;
+    netif->linkoutput = rza1_low_level_output;
+
+    /* Initialize the hardware */
+    ethcfg.int_priority = 6;
+    ethcfg.recv_cb      = &rza1_recv_callback;
+    ethcfg.ether_mac    = (char *)netif->hwaddr;
+    ethernetext_init(&ethcfg);
+
+    /* semaphore */
+    sys_sem_new(&recv_ready_sem, 0);
+
+    /* task */
+    sys_thread_new("rza1_recv_task", rza1_recv_task, netif, DEFAULT_THREAD_STACKSIZE, RECV_TASK_PRI);
+    sys_thread_new("rza1_phy_task", rza1_phy_task, netif, DEFAULT_THREAD_STACKSIZE, PHY_TASK_PRI);
+
+    return ERR_OK;
+}
+
+void eth_arch_enable_interrupts(void) {
+    ethernetext_start_stop(1);
+}
+
+void eth_arch_disable_interrupts(void) {
+    ethernetext_start_stop(0);
+}