stm32/network_wiznet5k: Add ability to trace Ethernet TX and RX frames.

Via: nic.config(trace=2|4)

ports/stm32/network_wiznet5k.c

@@ -32,12 +32,16 @@
 
 #if MICROPY_PY_WIZNET5K && MICROPY_PY_LWIP
 
+#include "lib/netutils/netutils.h"
 #include "drivers/wiznet5k/ethernet/socket.h"
 #include "lwip/err.h"
 #include "lwip/dns.h"
 #include "lwip/dhcp.h"
 #include "netif/etharp.h"
 
+#define TRACE_ETH_TX (0x0002)
+#define TRACE_ETH_RX (0x0004)
+
 /*******************************************************************************/
 // Wiznet5k Ethernet driver in MACRAW mode
 
@@ -48,6 +52,7 @@ typedef struct _wiznet5k_obj_t {
     mp_hal_pin_obj_t cs;
     mp_hal_pin_obj_t rst;
     uint8_t eth_frame[1514];
+    uint32_t trace_flags;
     struct netif netif;
     struct dhcp dhcp_struct;
 } wiznet5k_obj_t;
@@ -176,6 +181,9 @@ STATIC uint16_t wiznet5k_recv_ethernet(wiznet5k_obj_t *self) {
 STATIC err_t wiznet5k_netif_output(struct netif *netif, struct pbuf *p) {
     wiznet5k_obj_t *self = netif->state;
     pbuf_copy_partial(p, self->eth_frame, p->tot_len, 0);
+    if (self->trace_flags & TRACE_ETH_TX) {
+        netutils_ethernet_trace(MP_PYTHON_PRINTER, p->tot_len, self->eth_frame, NETUTILS_TRACE_IS_TX | NETUTILS_TRACE_NEWLINE);
+    }
     wiznet5k_send_ethernet(self, p->tot_len, self->eth_frame);
     return ERR_OK;
 }
@@ -223,6 +231,9 @@ STATIC void wiznet5k_lwip_poll(void *self_in, struct netif *netif) {
     wiznet5k_obj_t *self = self_in;
     uint16_t len;
     while ((len = wiznet5k_recv_ethernet(self)) > 0) {
+        if (self->trace_flags & TRACE_ETH_RX) {
+            netutils_ethernet_trace(MP_PYTHON_PRINTER, len, self->eth_frame, NETUTILS_TRACE_NEWLINE);
+        }
         struct pbuf *p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
         if (p != NULL) {
             pbuf_take(p, self->eth_frame, len);
@@ -260,6 +271,7 @@ STATIC mp_obj_t wiznet5k_make_new(const mp_obj_type_t *type, size_t n_args, size
     wiznet5k_obj.spi = spi;
     wiznet5k_obj.cs = cs;
     wiznet5k_obj.rst = rst;
+    wiznet5k_obj.trace_flags = 0;
 
     // Return wiznet5k object
     return MP_OBJ_FROM_PTR(&wiznet5k_obj);
@@ -381,7 +393,22 @@ STATIC mp_obj_t wiznet5k_config(size_t n_args, const mp_obj_t *args, mp_map_t *k
         if (n_args != 1) {
             mp_raise_TypeError("can't specify pos and kw args");
         }
-        mp_raise_ValueError("unknown config param");
+
+        for (size_t i = 0; i < kwargs->alloc; ++i) {
+            if (MP_MAP_SLOT_IS_FILLED(kwargs, i)) {
+                mp_map_elem_t *e = &kwargs->table[i];
+                switch (mp_obj_str_get_qstr(e->key)) {
+                    case MP_QSTR_trace: {
+                        self->trace_flags = mp_obj_get_int(e->value);
+                        break;
+                    }
+                    default:
+                        mp_raise_ValueError("unknown config param");
+                }
+            }
+        }
+
+        return mp_const_none;
     }
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_KW(wiznet5k_config_obj, 1, wiznet5k_config);