diff options
Diffstat (limited to 'firmware/zpu/apps/cruft/gen_eth_packets.c')
| -rw-r--r-- | firmware/zpu/apps/cruft/gen_eth_packets.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/firmware/zpu/apps/cruft/gen_eth_packets.c b/firmware/zpu/apps/cruft/gen_eth_packets.c new file mode 100644 index 000000000..4d521f6bf --- /dev/null +++ b/firmware/zpu/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; +} |