1 files changed, 187 insertions, 0 deletions
diff --git a/firmware/microblaze/apps/cruft/gen_eth_packets.c b/firmware/microblaze/apps/cruft/gen_eth_packets.c
new file mode 100644
index 000000000..4d521f6bf
--- /dev/null
+++ b/firmware/microblaze/apps/cruft/gen_eth_packets.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "u2_init.h"
+#include "memory_map.h"
+#include "spi.h"
+#include "hal_io.h"
+#include "buffer_pool.h"
+#include "pic.h"
+#include <stdbool.h>
+#include "ethernet.h"
+#include "nonstdio.h"
+#include "usrp2_eth_packet.h"
+#include "memcpy_wa.h"
+#include "print_rmon_regs.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+// ----------------------------------------------------------------
+
+static eth_mac_addr_t dst_mac_addr =
+  {{  0xff, 0xff, 0xff, 0xff, 0xff, 0xff }};
+
+// ----------------------------------------------------------------
+
+// #define	PACKET_SIZE 1500		// bytes
+// #define ETH_DATA_RATE 1000000		// 1MB/s
+// #define	ETH_PACKET_RATE (ETH_DATA_RATE/PACKET_SIZE)	// 13,3333 pkts/s
+
+// static int timer_delta = MASTER_CLK_RATE/ETH_PACKET_RATE;	// ticks between interrupts
+
+static int timer_delta = (int)(MASTER_CLK_RATE * 1e-3);		// tick at 1 kHz
+static int sim_timer_delta = (int)(MASTER_CLK_RATE * 100e-6);	// tick at 10 kHz
+
+static volatile bool send_packet_now = false;   // timer handler sets this
+static volatile bool link_is_up = false;	// eth handler sets this
+
+int packet_number = 0;
+
+
+#define CPU_TX_BUF	0	// cpu xmits ethernet frames from here
+#define CPU_RX_BUF	1	// receive ethernet frames here
+
+// ----------------------------------------------------------------
+
+/*
+ * Called when eth phy state changes (w/ interrupts disabled)
+ */
+void
+link_changed_callback(int speed)
+{
+  link_is_up = speed == 0 ? false : true;
+  hal_set_leds(link_is_up ? 0x2 : 0x0, 0x2);
+  printf("\neth link changed: speed = %d\n", speed);
+}
+
+void
+timer_irq_handler(unsigned irq)
+{
+  hal_set_timeout(timer_delta);	// schedule next timeout
+  send_packet_now = 1;
+}
+
+
+static void
+init_packet(int *buf, const u2_eth_packet_t *pkt, int bufnum)
+{
+  int i = 0;
+  int mark = ((bufnum & 0xff) << 24) | 0x005A0000;
+
+  for (i = 0; i < BP_NLINES; i++){
+    buf[i] = mark | i;
+    mark ^= 0x00FF0000;
+  }
+
+  // copy header into buffer
+  memcpy_wa(buf, pkt, sizeof(*pkt));
+}
+
+static void
+init_packets(void)
+{
+  u2_eth_packet_t	pkt __attribute__((aligned (4)));
+
+  memset(&pkt, 0, sizeof(pkt));
+
+  pkt.ehdr.dst = dst_mac_addr;
+  pkt.ehdr.src = *ethernet_mac_addr();
+  pkt.ehdr.ethertype = U2_ETHERTYPE;
+  pkt.fixed.word0 = 0x01234567;
+  pkt.fixed.timestamp = 0xffffffff;
+
+  // init just the one we're using
+  init_packet((void *)buffer_ram(CPU_TX_BUF), &pkt, CPU_TX_BUF);
+}
+
+int
+main(void)
+{
+  int npackets_sent = 0;
+
+  u2_init();
+
+  // setup tx gpio bits for GPIOM_FPGA_1 -- fpga debug output
+  //hal_gpio_set_sels(GPIO_TX_BANK, "1111111111111111");
+  //hal_gpio_set_sels(GPIO_RX_BANK, "1111111111111111");
+
+  putstr("\ngen_eth_packets\n");
+  
+  hal_set_leds(0x0, 0x3);
+
+  init_packets();
+
+  pic_register_handler(IRQ_TIMER, timer_irq_handler);
+
+  if (hwconfig_simulation_p())
+    timer_delta = sim_timer_delta;
+
+  hal_set_timeout(timer_delta);
+
+  ethernet_register_link_changed_callback(link_changed_callback);
+  ethernet_init();
+
+  /*
+  if (hwconfig_simulation_p()){
+    eth_mac->speed = 4;	// hardcode mac speed to 1000
+    link_is_up = true;
+  }
+  */
+
+  // fire off a receive from the ethernet
+  bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
+
+  while(1){
+    uint32_t status = buffer_pool_status->status;
+
+    if (status & (BPS_DONE(CPU_RX_BUF) | BPS_ERROR(CPU_RX_BUF))){
+      bp_clear_buf(CPU_RX_BUF);
+      // ignore incoming ethernet packets; they were looped back in sim
+      bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
+    }
+
+    if (status & (BPS_DONE(CPU_TX_BUF) | BPS_ERROR(CPU_TX_BUF))){
+      if (status & BPS_ERROR(CPU_TX_BUF)){
+	putchar('E');
+      }
+      bp_clear_buf(CPU_TX_BUF);
+      npackets_sent++;
+      if ((npackets_sent & 0xF) == 0){	// print after every 16 packets
+	//print_rmon_regs();
+	putchar('.');
+      }
+    }
+
+    if (link_is_up && send_packet_now && (status & BPS_IDLE(CPU_TX_BUF))){
+      send_packet_now = false;
+
+      // kick off the next packet
+      // FIXME set packet number in packet
+
+      bp_send_from_buf(CPU_TX_BUF, PORT_ETH, 1, 0, 255);	// 1KB total
+      hal_toggle_leds(0x1);
+    }
+  }
+
+  hal_finish();
+  return 1;
+}