mirror of https://gerrit.osmocom.org/libusrp
381 lines
7.9 KiB
C
381 lines
7.9 KiB
C
/*
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* USRP - Universal Software Radio Peripheral
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*
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* Copyright (C) 2003,2004 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
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*/
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#include "usrp_common.h"
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#include "usrp_commands.h"
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#include "fpga.h"
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#include "usrp_gpif_inline.h"
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#include "timer.h"
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#include "i2c.h"
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#include "isr.h"
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#include "usb_common.h"
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#include "fx2utils.h"
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#include "usrp_globals.h"
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#include "usrp_i2c_addr.h"
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#include <string.h>
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#include "spi.h"
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#include "eeprom_io.h"
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#include "usb_descriptors.h"
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/*
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* offsets into boot eeprom for configuration values
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*/
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#define HW_REV_OFFSET 5
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#define SERIAL_NO_OFFSET 248
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#define SERIAL_NO_LEN 8
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#define bRequestType SETUPDAT[0]
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#define bRequest SETUPDAT[1]
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#define wValueL SETUPDAT[2]
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#define wValueH SETUPDAT[3]
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#define wIndexL SETUPDAT[4]
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#define wIndexH SETUPDAT[5]
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#define wLengthL SETUPDAT[6]
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#define wLengthH SETUPDAT[7]
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unsigned char g_tx_enable = 0;
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unsigned char g_rx_enable = 0;
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unsigned char g_rx_overrun = 0;
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unsigned char g_tx_underrun = 0;
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/*
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* the host side fpga loader code pushes an MD5 hash of the bitstream
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* into hash1.
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*/
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#define USRP_HASH_SIZE 16
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__xdata __at USRP_HASH_SLOT_1_ADDR unsigned char hash1[USRP_HASH_SIZE];
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static void
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get_ep0_data (void)
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{
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EP0BCL = 0; // arm EP0 for OUT xfer. This sets the busy bit
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while (EP0CS & bmEPBUSY) // wait for busy to clear
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;
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}
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/*
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* Handle our "Vendor Extension" commands on endpoint 0.
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* If we handle this one, return non-zero.
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*/
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unsigned char
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app_vendor_cmd (void)
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{
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if (bRequestType == VRT_VENDOR_IN){
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/////////////////////////////////
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// handle the IN requests
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/////////////////////////////////
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switch (bRequest){
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case VRQ_GET_STATUS:
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switch (wIndexL){
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case GS_TX_UNDERRUN:
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EP0BUF[0] = g_tx_underrun;
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g_tx_underrun = 0;
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EP0BCH = 0;
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EP0BCL = 1;
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break;
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case GS_RX_OVERRUN:
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EP0BUF[0] = g_rx_overrun;
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g_rx_overrun = 0;
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EP0BCH = 0;
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EP0BCL = 1;
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break;
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default:
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return 0;
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}
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break;
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case VRQ_I2C_READ:
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if (!i2c_read (wValueL, EP0BUF, wLengthL))
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return 0;
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EP0BCH = 0;
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EP0BCL = wLengthL;
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break;
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case VRQ_SPI_READ:
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if (!spi_read (wValueH, wValueL, wIndexH, wIndexL, EP0BUF, wLengthL))
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return 0;
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EP0BCH = 0;
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EP0BCL = wLengthL;
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break;
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default:
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return 0;
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}
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}
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else if (bRequestType == VRT_VENDOR_OUT){
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/////////////////////////////////
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// handle the OUT requests
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/////////////////////////////////
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switch (bRequest){
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case VRQ_SET_LED:
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switch (wIndexL){
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case 0:
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set_led_0 (wValueL);
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break;
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case 1:
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set_led_1 (wValueL);
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break;
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default:
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return 0;
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}
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break;
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case VRQ_FPGA_LOAD:
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switch (wIndexL){ // sub-command
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case FL_BEGIN:
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return fpga_load_begin ();
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case FL_XFER:
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get_ep0_data ();
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return fpga_load_xfer (EP0BUF, EP0BCL);
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case FL_END:
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return fpga_load_end ();
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default:
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return 0;
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}
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break;
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case VRQ_FPGA_SET_RESET:
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fpga_set_reset (wValueL);
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break;
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case VRQ_FPGA_SET_TX_ENABLE:
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fpga_set_tx_enable (wValueL);
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break;
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case VRQ_FPGA_SET_RX_ENABLE:
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fpga_set_rx_enable (wValueL);
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break;
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case VRQ_FPGA_SET_TX_RESET:
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fpga_set_tx_reset (wValueL);
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break;
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case VRQ_FPGA_SET_RX_RESET:
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fpga_set_rx_reset (wValueL);
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break;
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case VRQ_I2C_WRITE:
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get_ep0_data ();
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if (!i2c_write (wValueL, EP0BUF, EP0BCL))
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return 0;
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break;
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case VRQ_SPI_WRITE:
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get_ep0_data ();
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if (!spi_write (wValueH, wValueL, wIndexH, wIndexL, EP0BUF, EP0BCL))
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return 0;
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break;
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default:
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return 0;
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}
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}
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else
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return 0; // invalid bRequestType
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return 1;
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}
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static void
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main_loop (void)
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{
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setup_flowstate_common ();
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while (1){
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if (usb_setup_packet_avail ())
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usb_handle_setup_packet ();
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if (GPIFTRIG & bmGPIF_IDLE){
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// OK, GPIF is idle. Let's try to give it some work.
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// First check for underruns and overruns
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if (UC_BOARD_HAS_FPGA && (USRP_PA & (bmPA_TX_UNDERRUN | bmPA_RX_OVERRUN))){
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// record the under/over run
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if (USRP_PA & bmPA_TX_UNDERRUN)
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g_tx_underrun = 1;
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if (USRP_PA & bmPA_RX_OVERRUN)
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g_rx_overrun = 1;
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// tell the FPGA to clear the flags
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fpga_clear_flags ();
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}
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// Next see if there are any "OUT" packets waiting for our attention,
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// and if so, if there's room in the FPGA's FIFO for them.
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if (g_tx_enable && !(EP24FIFOFLGS & 0x02)){ // USB end point fifo is not empty...
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if (fpga_has_room_for_packet ()){ // ... and FPGA has room for packet
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GPIFTCB1 = 0x01; SYNCDELAY;
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GPIFTCB0 = 0x00; SYNCDELAY;
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setup_flowstate_write ();
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SYNCDELAY;
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GPIFTRIG = bmGPIF_EP2_START | bmGPIF_WRITE; // start the xfer
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SYNCDELAY;
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while (!(GPIFTRIG & bmGPIF_IDLE)){
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// wait for the transaction to complete
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}
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}
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}
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// See if there are any requests for "IN" packets, and if so
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// whether the FPGA's got any packets for us.
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if (g_rx_enable && !(EP6CS & bmEPFULL)){ // USB end point fifo is not full...
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if (fpga_has_packet_avail ()){ // ... and FPGA has packet available
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GPIFTCB1 = 0x01; SYNCDELAY;
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GPIFTCB0 = 0x00; SYNCDELAY;
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setup_flowstate_read ();
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SYNCDELAY;
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GPIFTRIG = bmGPIF_EP6_START | bmGPIF_READ; // start the xfer
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SYNCDELAY;
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while (!(GPIFTRIG & bmGPIF_IDLE)){
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// wait for the transaction to complete
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}
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SYNCDELAY;
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INPKTEND = 6; // tell USB we filled buffer (6 is our endpoint num)
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}
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}
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}
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}
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}
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/*
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* called at 100 Hz from timer2 interrupt
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*
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* Toggle led 0
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*/
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void
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isr_tick (void) __interrupt
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{
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static unsigned char count = 1;
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if (--count == 0){
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count = 50;
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USRP_LED_REG ^= bmLED0;
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}
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clear_timer_irq ();
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}
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/*
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* Read h/w rev code and serial number out of boot eeprom and
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* patch the usb descriptors with the values.
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*/
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void
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patch_usb_descriptors(void)
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{
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static __xdata unsigned char hw_rev;
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static __xdata unsigned char serial_no[8];
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unsigned char i;
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eeprom_read(I2C_ADDR_BOOT, HW_REV_OFFSET, &hw_rev, 1); // LSB of device id
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usb_desc_hw_rev_binary_patch_location_0[0] = hw_rev;
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usb_desc_hw_rev_binary_patch_location_1[0] = hw_rev;
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usb_desc_hw_rev_ascii_patch_location_0[0] = hw_rev + '0'; // FIXME if we get > 9
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eeprom_read(I2C_ADDR_BOOT, SERIAL_NO_OFFSET, serial_no, SERIAL_NO_LEN);
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for (i = 0; i < SERIAL_NO_LEN; i++){
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unsigned char ch = serial_no[i];
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if (ch == 0xff) // make unprogrammed EEPROM default to '0'
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ch = '0';
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usb_desc_serial_number_ascii[i << 1] = ch;
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}
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}
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void
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main (void)
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{
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#if 0
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g_rx_enable = 0; // FIXME (work around initialization bug)
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g_tx_enable = 0;
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g_rx_overrun = 0;
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g_tx_underrun = 0;
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#endif
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memset (hash1, 0, USRP_HASH_SIZE); // zero fpga bitstream hash. This forces reload
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init_usrp ();
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init_gpif ();
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// if (UC_START_WITH_GSTATE_OUTPUT_ENABLED)
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IFCONFIG |= bmGSTATE; // no conflict, start with it on
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set_led_0 (0);
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set_led_1 (0);
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EA = 0; // disable all interrupts
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patch_usb_descriptors();
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setup_autovectors ();
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usb_install_handlers ();
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hook_timer_tick ((unsigned short) isr_tick);
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EIEX4 = 1; // disable INT4 FIXME
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EA = 1; // global interrupt enable
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fx2_renumerate (); // simulates disconnect / reconnect
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main_loop ();
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}
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