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[/] [gecko3/] [trunk/] [GECKO3COM/] [gecko3com-fw/] [firmware/] [src/] [fpga_load.c] - Blame information for rev 33

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/* GECKO3COM
 *
 * Copyright (C) 2008 by
 *   ___    ____  _   _
 *  (  _`\ (  __)( ) ( )
 *  | (_) )| (_  | |_| |   Bern University of Applied Sciences
 *  |  _ <'|  _) |  _  |   School of Engineering and
 *  | (_) )| |   | | | |   Information Technology
 *  (____/'(_)   (_) (_)
 *
 *
 * 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/>.
 */
 
/*********************************************************************/
/** \file     fpga_load.c
 *********************************************************************
 * \brief     functions to programm an FPGA
 *
 *            These functions handle the bit file for an Xilinx Spartan3
 *            FPGA and programm it in parallel slave mode.
 *
 * \note      Currently only Xilinx FPGA's are supported, function stubs
 *            to handle Altera are provided as a guide for porting.
 *
 * \author    GNUradio team, Matthias Zurbrügg bfh.ch,
 *            Christoph Zimmermann bfh.ch
 * \date      2009-1-13
 *
*/
 
#include "gecko3com_common.h"
#include "gecko3com_regs.h"
#include "fpga_load.h"
#include "delay.h"
#include "debugprint.h"
 
/* ------------------------------------------------------------------------- */
/* Xilinx stuff. We use slave parallel mode (select map) to configure the FPGA
 */
#ifdef XILINX
 
/** makro to toggle the configuration clock line */
#define toggle_cclk() { \
    XILINX_CCLK &= ~bmXILINX_CCLK;      /* bring CCLK low */            \
    XILINX_CCLK |= bmXILINX_CCLK;       /* bring CCLK high */           \
}
 
 
void init_fpga_interface(void) {
 
  /* IFCLK is generated internally and runs at 48 MHz; IO Pins configured as normal Ports */
  //IFCONFIG = bmIFCLKSRC | bm3048MHZ | bmIFCLKOE;
  IFCONFIG = bmIFCLKSRC | bmIFCLKOE;
  SYNCDELAY;
}
 
 
int8_t fpga_scan_file(const xdata unsigned char *p, idata uint16_t *offset, \
                       idata uint16_t *length, xdata Fpga_Info* info)
{
  static idata uint8_t string_length = 0, chars_left_to_read = 0;
  xdata uint16_t local_position = *offset;
 
  for(local_position; local_position < *length; local_position++) {
 
    /* information found, copy data to output array */
    if(chars_left_to_read < string_length) {
      //printf_tiny("fi: %d\n",local_position);
      info->info[chars_left_to_read++] = p[local_position];
 
      /* end of information, return successfull */
      if(chars_left_to_read == string_length) {
        //print_info("l\n");
        info->position = local_position;
        *offset = local_position+1;
        string_length = 0;
        chars_left_to_read = 0;
        return FPGA_INFO_COMPLETE;
      }
      else {
        continue; /* ignore rest of these loop, load next character */
      }
    }
 
    /* search for the start of the desired type of information */
    if(chars_left_to_read == 0 && p[local_position] == info->type){
      chars_left_to_read = 1;
      continue; /* ignore rest of these loop, load next character */
    }
 
    /* start character found, check next character if it is \0 */
    if(chars_left_to_read == 1) {
      if(p[local_position] == 0) {
        chars_left_to_read = 2;
 
      }
      else {
        /* false alert, continue searching */
        chars_left_to_read = 0;
      }
      continue; /* ignore rest of these loop, load next character */
    }
 
    /* start of information found, copy length of following string */
    if(chars_left_to_read == 2) {
      chars_left_to_read = 0;
 
      if(p[local_position] > FPGA_INFO_LEN) {
        string_length = FPGA_INFO_LEN;
      }
      else {
        string_length = p[local_position];
      }
 
      /* exception: file length has a fixed length */
      if(info->type == FILE_LENGTH) {
        string_length = 3;
        chars_left_to_read = 1;
        info->info[0] = p[local_position];
      }
    }
 
    /* end of for loop. nothing found yet, load next character */
  }
 
 
  /* end of packet reached, no info found or not finished copying string */
  info->position = local_position;
  *offset = local_position;
  return FPGA_INFO_NOT_COMPLETE;
}
 
 
uint8_t fpga_load_begin(void)
{
  idata uint8_t i;
 
  /* enable autopointer 0 */
  AUTOPTRSETUP = bmAPTREN | bmAPTR1INC;
 
  /* CS_B, RDWR_B should be high after board initialization
   * but when something went wrong during fpga config the state is unknown */
  if(!(XILINX_CS_B | bmXILINX_CS_B) || !(XILINX_RDWR_B | bmXILINX_RDWR_B)) {
    /* bring first RDWR_B high to signal ABORT to the FPGA */
    XILINX_RDWR_B |= bmXILINX_RDWR_B;
 
    /* toggle CCLK four times more to complete the abort sequenze  */
    for(i=0; i<4; i++) {
      toggle_cclk();
    }
    XILINX_CS_B |= bmXILINX_CS_B;
  }
 
  /* bring Prog_B low brings the device in the initalisation mode */
  XILINX_PROG_B &= ~bmXILINX_PROG_B;
  udelay(100);                        // and hold it there
 
  /* bring Prog_B bit high */
  XILINX_PROG_B |= bmXILINX_PROG_B;
 
  /* if Init_B goes high the device is in the configuration load mode */
  for(i=0;i<50;i++) {
    if(XILINX_INIT_B & bmXILINX_INIT_B) {
    //if(1) { /* this line is needed for LA tests, uncomment this and comment the line befor */
 
      /* bring CS_B, RDWR_B low */
      XILINX_RDWR_B &= ~bmXILINX_RDWR_B;
      XILINX_CS_B &= ~bmXILINX_CS_B;
 
      return 1;
    }
    mdelay(1);
  }
 
  /* FPGA not ready to configure */
  return 0;
}
 
 
uint8_t fpga_load_xfer(xdata unsigned char *p, idata uint16_t *offset, \
                       idata uint16_t *bytecount)
{
  idata uint16_t local_count;
  uint8_t local_data;
 
  //printf_tiny("off %d ",local_count);
  //printf_tiny("c %d\n",*bytecount);
 
  local_count = *offset;
 
  /* setup  autopointer source adress from parameter p and the offset */
  AUTOPTRH1 = ((uintptr_t)p >> 8);
  AUTOPTRL1 = ((uintptr_t)p & 0xFF);
  AUTOPTRH1 += (local_count >> 8);
  AUTOPTRL1 += (local_count & 0xFF);
 
  /* setup a for loop to send the data to the fpga data port */
  for(local_count; local_count < *bytecount; local_count++ ) {
    //XILINX_DATA = AUTODAT1;           // drive Data Port with data
    local_data = AUTODAT1;
    XILINX_DATA = local_data;
 
    toggle_cclk();
 
    //printf_tiny("0x%x ",local_data);
 
    /* no need for us because we are way to slow that a busy occours */
    /* loop while busy is true */
    /*while((XILINX_BUSY & bmXILINX_BUSY) ==  bmXILINX_BUSY) {
      // if FPGA busy, toggle CCLK
      toggle_cclk();
    }
    */
  }
 
  *offset += *bytecount;
  return 1;
}
 
 
/*
 * check for successful load...
 */
uint8_t
fpga_load_end(void)
{
  idata uint8_t i;
 
  /* toggle CCLK four times more to complete the startup sequenze  */
  for(i=0; i<4; i++) {
    toggle_cclk();
  }
 
  /* bring CS_B, RDWR_B high */
  XILINX_CS_B |= bmXILINX_CS_B;
  XILINX_RDWR_B |= bmXILINX_RDWR_B;
 
  if(!fpga_done()) {
    /* if not DONE, an error occoured during configuration */
    //print_err("fin.\n");
    return 0;
  }
 
  return 1;
}
#endif /* XILINX */
 
 
/* ------------------------------------------------------------------------- */
/* Altera stuff. only copied from USRP source code. does not work. only a
 * guide to give you a start to port GECKO3COM to other boards using Altera
 * devices
 */
 
#ifdef ALTERA
/*
 * setup altera FPGA serial load (PS).
 *
 * On entry:
 *      don't care
 *
 * On exit:
 *      ALTERA_DCLK    = 0
 *      ALTERA_NCONFIG = 1
 *      ALTERA_NSTATUS = 1 (input)
 */
uint8_t
fpga_load_begin(void)
{
  ALTERA_CONFIG &= ~bmALTERA_BITS;              // clear all bits (NCONFIG low)
  udelay (40);                                  // wait 40 us
  ALTERA_CONFIG |= bmALTERA_NCONFIG;    // set NCONFIG high
 
  if (UC_BOARD_HAS_FPGA){
    // FIXME should really cap this loop with a counter so we
    //   don't hang forever on a hardware failure.
    while ((USRP_ALTERA_CONFIG & bmALTERA_NSTATUS) == 0) // wait for NSTATUS to go high
      ;
  }
 
  // ready to xfer now
 
  return 1;
}
 
/*
 * clock out the low bit of bits.
 *
 * On entry:
 *      ALTERA_DCLK    = 0
 *      ALTERA_NCONFIG = 1
 *      ALTERA_NSTATUS = 1 (input)
 *
 * On exit:
 *      ALTERA_DCLK    = 0
 *      ALTERA_NCONFIG = 1
 *      ALTERA_NSTATUS = 1 (input)
 */
 
static void
clock_out_config_byte(const uint8_t bits) _naked
{
    _asm
        mov     a, dpl
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        rrc     a
        mov     _bitALTERA_DATA0,c
        setb    _bitALTERA_DCLK
        clr     _bitALTERA_DCLK
 
        ret
 
    _endasm;
}
 
static void
clock_out_bytes(const uint8_t bytecount,
                 uint8_t xdata *p)
{
  while (bytecount-- > 0)
    clock_out_config_byte (*p++);
}
 
/*
 * Transfer block of bytes from packet to FPGA serial configuration port
 *
 * On entry:
 *      ALTERA_DCLK    = 0
 *      ALTERA_NCONFIG = 1
 *      ALTERA_NSTATUS = 1 (input)
 *
 * On exit:
 *      ALTERA_DCLK    = 0
 *      ALTERA_NCONFIG = 1
 *      ALTERA_NSTATUS = 1 (input)
 */
uint8_t
fpga_load_xfer(const xdata uint8_t *p, const uint8_t bytecount)
{
  clock_out_bytes (bytecount, p);
  return 1;
}
 
/*
 * check for successful load...
 */
uint8_t
fpga_load_end(void)
{
  uint8_t status = ALTERA_CONFIG;
 
  if (!UC_BOARD_HAS_FPGA)                       // always true if we don't have FPGA
    return 1;
 
  if ((status & bmALTERA_NSTATUS) == 0)          // failed to program
    return 0;
 
  if ((status & bmALTERA_CONF_DONE) == bmALTERA_CONF_DONE)
    return 1;                                   // everything's cool
 
  // I don't think this should happen.  It indicates that
  // programming is still in progress.
 
  return 0;
}
 
#endif /* ALTERA */

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Subversion Repositories gecko3

[/] [gecko3/] [trunk/] [GECKO3COM/] [gecko3com-fw/] [firmware/] [src/] [fpga_load.c] - Blame information for rev 33

Line No.	Rev	Author	Line
1	9	nussgipfel	`/* GECKO3COM`
2			`*`
3			`* Copyright (C) 2008 by`
4			`* ___ ____ _ _`
5			* ( _`\ ( __)( ) ( )
6			`* \| (_) )\| (_ \| \|_\| \| Bern University of Applied Sciences`
7			`* \| _ <'\| _) \| _ \| School of Engineering and`
8			`* \| (_) )\| \| \| \| \| \| Information Technology`
9			`* (____/'(_) (_) (_)`
10			`*`
11			`*`
12			`* This program is free software: you can redistribute it and/or modify`
13			`* it under the terms of the GNU General Public License as published by`
14			`* the Free Software Foundation, either version 3 of the License, or`
15			`* (at your option) any later version.`
16			`*`
17			`* This program is distributed in the hope that it will be useful,`
18			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
19			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
20			`* GNU General Public License for more details.`
21			`* You should have received a copy of the GNU General Public License`
22			`* along with this program. If not, see <http://www.gnu.org/licenses/>.`
23			`*/`
24
25			`/*********************************************************************/`
26			`/** \file fpga_load.c`
27			`*********************************************************************`
28			`* \brief functions to programm an FPGA`
29			`*`
30			`* These functions handle the bit file for an Xilinx Spartan3`
31			`* FPGA and programm it in parallel slave mode.`
32			`*`
33			`* \note Currently only Xilinx FPGA's are supported, function stubs`
34			`* to handle Altera are provided as a guide for porting.`
35			`*`
36			`* \author GNUradio team, Matthias Zurbrügg bfh.ch,`
37			`* Christoph Zimmermann bfh.ch`
38			`* \date 2009-1-13`
39			`*`
40			`*/`
41
42			`#include "gecko3com_common.h"`
43			`#include "gecko3com_regs.h"`
44			`#include "fpga_load.h"`
45			`#include "delay.h"`
46			`#include "debugprint.h"`
47
48			`/* ------------------------------------------------------------------------- */`
49			`/* Xilinx stuff. We use slave parallel mode (select map) to configure the FPGA`
50			`*/`
51			`#ifdef XILINX`
52
53			`/** makro to toggle the configuration clock line */`
54			`#define toggle_cclk() { \`
55			`XILINX_CCLK &= ~bmXILINX_CCLK; /* bring CCLK low */ \`
56			`XILINX_CCLK \|= bmXILINX_CCLK; /* bring CCLK high */ \`
57			`}`
58
59
60			`void init_fpga_interface(void) {`
61
62			`/* IFCLK is generated internally and runs at 48 MHz; IO Pins configured as normal Ports */`
63			`//IFCONFIG = bmIFCLKSRC \| bm3048MHZ \| bmIFCLKOE;`
64			`IFCONFIG = bmIFCLKSRC \| bmIFCLKOE;`
65			`SYNCDELAY;`
66			`}`
67
68
69			`int8_t fpga_scan_file(const xdata unsigned char p, idata uint16_t offset, \`
70			`idata uint16_t length, xdata Fpga_Info info)`
71			`{`
72	33	nussgipfel	`static idata uint8_t string_length = 0, chars_left_to_read = 0;`
73	9	nussgipfel	`xdata uint16_t local_position = *offset;`
74
75			`for(local_position; local_position < *length; local_position++) {`
76	33	nussgipfel
77	9	nussgipfel	`/* information found, copy data to output array */`
78			`if(chars_left_to_read < string_length) {`
79	33	nussgipfel	`//printf_tiny("fi: %d\n",local_position);`
80	9	nussgipfel	`info->info[chars_left_to_read++] = p[local_position];`
81
82			`/* end of information, return successfull */`
83			`if(chars_left_to_read == string_length) {`
84	33	nussgipfel	`//print_info("l\n");`
85	9	nussgipfel	`info->position = local_position;`
86			`*offset = local_position+1;`
87	33	nussgipfel	`string_length = 0;`
88			`chars_left_to_read = 0;`
89	9	nussgipfel	`return FPGA_INFO_COMPLETE;`
90			`}`
91			`else {`
92			`continue; /* ignore rest of these loop, load next character */`
93			`}`
94			`}`
95
96			`/* search for the start of the desired type of information */`
97			`if(chars_left_to_read == 0 && p[local_position] == info->type){`
98			`chars_left_to_read = 1;`
99			`continue; /* ignore rest of these loop, load next character */`
100			`}`
101
102			`/* start character found, check next character if it is \0 */`
103			`if(chars_left_to_read == 1) {`
104			`if(p[local_position] == 0) {`
105			`chars_left_to_read = 2;`
106
107			`}`
108			`else {`
109			`/* false alert, continue searching */`
110			`chars_left_to_read = 0;`
111			`}`
112			`continue; /* ignore rest of these loop, load next character */`
113			`}`
114
115			`/* start of information found, copy length of following string */`
116			`if(chars_left_to_read == 2) {`
117			`chars_left_to_read = 0;`
118
119			`if(p[local_position] > FPGA_INFO_LEN) {`
120			`string_length = FPGA_INFO_LEN;`
121			`}`
122			`else {`
123			`string_length = p[local_position];`
124			`}`
125
126			`/* exception: file length has a fixed length */`
127			`if(info->type == FILE_LENGTH) {`
128			`string_length = 3;`
129			`chars_left_to_read = 1;`
130			`info->info[0] = p[local_position];`
131			`}`
132			`}`
133
134			`/* end of for loop. nothing found yet, load next character */`
135			`}`
136
137
138			`/* end of packet reached, no info found or not finished copying string */`
139			`info->position = local_position;`
140			`*offset = local_position;`
141			`return FPGA_INFO_NOT_COMPLETE;`
142			`}`
143
144
145			`uint8_t fpga_load_begin(void)`
146			`{`
147			`idata uint8_t i;`
148
149			`/* enable autopointer 0 */`
150			`AUTOPTRSETUP = bmAPTREN \| bmAPTR1INC;`
151
152			`/* CS_B, RDWR_B should be high after board initialization`
153			`* but when something went wrong during fpga config the state is unknown */`
154			`if(!(XILINX_CS_B \| bmXILINX_CS_B) \|\| !(XILINX_RDWR_B \| bmXILINX_RDWR_B)) {`
155			`/* bring first RDWR_B high to signal ABORT to the FPGA */`
156			`XILINX_RDWR_B \|= bmXILINX_RDWR_B;`
157
158			`/* toggle CCLK four times more to complete the abort sequenze */`
159			`for(i=0; i<4; i++) {`
160			`toggle_cclk();`
161			`}`
162			`XILINX_CS_B \|= bmXILINX_CS_B;`
163			`}`
164
165			`/* bring Prog_B low brings the device in the initalisation mode */`
166			`XILINX_PROG_B &= ~bmXILINX_PROG_B;`
167			`udelay(100); // and hold it there`
168
169			`/* bring Prog_B bit high */`
170			`XILINX_PROG_B \|= bmXILINX_PROG_B;`
171
172			`/* if Init_B goes high the device is in the configuration load mode */`
173			`for(i=0;i<50;i++) {`
174			`if(XILINX_INIT_B & bmXILINX_INIT_B) {`
175			`//if(1) { /* this line is needed for LA tests, uncomment this and comment the line befor */`
176
177			`/* bring CS_B, RDWR_B low */`
178			`XILINX_RDWR_B &= ~bmXILINX_RDWR_B;`
179			`XILINX_CS_B &= ~bmXILINX_CS_B;`
180
181			`return 1;`
182			`}`
183			`mdelay(1);`
184			`}`
185
186			`/* FPGA not ready to configure */`
187			`return 0;`
188			`}`
189
190
191			`uint8_t fpga_load_xfer(xdata unsigned char p, idata uint16_t offset, \`
192			`idata uint16_t *bytecount)`
193			`{`
194			`idata uint16_t local_count;`
195			`uint8_t local_data;`
196
197			`//printf_tiny("off %d ",local_count);`
198			`//printf_tiny("c %d\n",*bytecount);`
199
200			`local_count = *offset;`
201
202			`/* setup autopointer source adress from parameter p and the offset */`
203			`AUTOPTRH1 = ((uintptr_t)p >> 8);`
204			`AUTOPTRL1 = ((uintptr_t)p & 0xFF);`
205			`AUTOPTRH1 += (local_count >> 8);`
206			`AUTOPTRL1 += (local_count & 0xFF);`
207
208			`/* setup a for loop to send the data to the fpga data port */`
209			`for(local_count; local_count < *bytecount; local_count++ ) {`
210			`//XILINX_DATA = AUTODAT1; // drive Data Port with data`
211			`local_data = AUTODAT1;`
212			`XILINX_DATA = local_data;`
213
214			`toggle_cclk();`
215
216			`//printf_tiny("0x%x ",local_data);`
217
218			`/* no need for us because we are way to slow that a busy occours */`
219			`/* loop while busy is true */`
220			`/*while((XILINX_BUSY & bmXILINX_BUSY) == bmXILINX_BUSY) {`
221			`// if FPGA busy, toggle CCLK`
222			`toggle_cclk();`
223			`}`
224			`*/`
225			`}`
226
227			`offset += bytecount;`
228			`return 1;`
229			`}`
230
231
232			`/*`
233			`* check for successful load...`
234			`*/`
235			`uint8_t`
236			`fpga_load_end(void)`
237			`{`
238			`idata uint8_t i;`
239
240			`/* toggle CCLK four times more to complete the startup sequenze */`
241			`for(i=0; i<4; i++) {`
242			`toggle_cclk();`
243			`}`
244
245			`/* bring CS_B, RDWR_B high */`
246			`XILINX_CS_B \|= bmXILINX_CS_B;`
247			`XILINX_RDWR_B \|= bmXILINX_RDWR_B;`
248
249			`if(!fpga_done()) {`
250			`/* if not DONE, an error occoured during configuration */`
251	21	nussgipfel	`//print_err("fin.\n");`
252	9	nussgipfel	`return 0;`
253			`}`
254
255			`return 1;`
256			`}`
257			`#endif /* XILINX */`
258
259
260			`/* ------------------------------------------------------------------------- */`
261			`/* Altera stuff. only copied from USRP source code. does not work. only a`
262			`* guide to give you a start to port GECKO3COM to other boards using Altera`
263			`* devices`
264			`*/`
265
266			`#ifdef ALTERA`
267			`/*`
268			`* setup altera FPGA serial load (PS).`
269			`*`
270			`* On entry:`
271			`* don't care`
272			`*`
273			`* On exit:`
274			`* ALTERA_DCLK = 0`
275			`* ALTERA_NCONFIG = 1`
276			`* ALTERA_NSTATUS = 1 (input)`
277			`*/`
278			`uint8_t`
279			`fpga_load_begin(void)`
280			`{`
281			`ALTERA_CONFIG &= ~bmALTERA_BITS; // clear all bits (NCONFIG low)`
282			`udelay (40); // wait 40 us`
283			`ALTERA_CONFIG \|= bmALTERA_NCONFIG; // set NCONFIG high`
284
285			`if (UC_BOARD_HAS_FPGA){`
286			`// FIXME should really cap this loop with a counter so we`
287			`// don't hang forever on a hardware failure.`
288			`while ((USRP_ALTERA_CONFIG & bmALTERA_NSTATUS) == 0) // wait for NSTATUS to go high`
289			`;`
290			`}`
291
292			`// ready to xfer now`
293
294			`return 1;`
295			`}`
296
297			`/*`
298			`* clock out the low bit of bits.`
299			`*`
300			`* On entry:`
301			`* ALTERA_DCLK = 0`
302			`* ALTERA_NCONFIG = 1`
303			`* ALTERA_NSTATUS = 1 (input)`
304			`*`
305			`* On exit:`
306			`* ALTERA_DCLK = 0`
307			`* ALTERA_NCONFIG = 1`
308			`* ALTERA_NSTATUS = 1 (input)`
309			`*/`
310
311			`static void`
312			`clock_out_config_byte(const uint8_t bits) _naked`
313			`{`
314			`_asm`
315			`mov a, dpl`
316
317			`rrc a`
318			`mov _bitALTERA_DATA0,c`
319			`setb _bitALTERA_DCLK`
320			`clr _bitALTERA_DCLK`
321
322			`rrc a`
323			`mov _bitALTERA_DATA0,c`
324			`setb _bitALTERA_DCLK`
325			`clr _bitALTERA_DCLK`
326
327			`rrc a`
328			`mov _bitALTERA_DATA0,c`
329			`setb _bitALTERA_DCLK`
330			`clr _bitALTERA_DCLK`
331
332			`rrc a`
333			`mov _bitALTERA_DATA0,c`
334			`setb _bitALTERA_DCLK`
335			`clr _bitALTERA_DCLK`
336
337			`rrc a`
338			`mov _bitALTERA_DATA0,c`
339			`setb _bitALTERA_DCLK`
340			`clr _bitALTERA_DCLK`
341
342			`rrc a`
343			`mov _bitALTERA_DATA0,c`
344			`setb _bitALTERA_DCLK`
345			`clr _bitALTERA_DCLK`
346
347			`rrc a`
348			`mov _bitALTERA_DATA0,c`
349			`setb _bitALTERA_DCLK`
350			`clr _bitALTERA_DCLK`
351
352			`rrc a`
353			`mov _bitALTERA_DATA0,c`
354			`setb _bitALTERA_DCLK`
355			`clr _bitALTERA_DCLK`
356
357			`ret`
358
359			`_endasm;`
360			`}`
361
362			`static void`
363			`clock_out_bytes(const uint8_t bytecount,`
364			`uint8_t xdata *p)`
365			`{`
366			`while (bytecount-- > 0)`
367			`clock_out_config_byte (*p++);`
368			`}`
369
370			`/*`
371			`* Transfer block of bytes from packet to FPGA serial configuration port`
372			`*`
373			`* On entry:`
374			`* ALTERA_DCLK = 0`
375			`* ALTERA_NCONFIG = 1`
376			`* ALTERA_NSTATUS = 1 (input)`
377			`*`
378			`* On exit:`
379			`* ALTERA_DCLK = 0`
380			`* ALTERA_NCONFIG = 1`
381			`* ALTERA_NSTATUS = 1 (input)`
382			`*/`
383			`uint8_t`
384			`fpga_load_xfer(const xdata uint8_t *p, const uint8_t bytecount)`
385			`{`
386			`clock_out_bytes (bytecount, p);`
387			`return 1;`
388			`}`
389
390			`/*`
391			`* check for successful load...`
392			`*/`
393			`uint8_t`
394			`fpga_load_end(void)`
395			`{`
396			`uint8_t status = ALTERA_CONFIG;`
397
398			`if (!UC_BOARD_HAS_FPGA) // always true if we don't have FPGA`
399			`return 1;`
400
401			`if ((status & bmALTERA_NSTATUS) == 0) // failed to program`
402			`return 0;`
403
404			`if ((status & bmALTERA_CONF_DONE) == bmALTERA_CONF_DONE)`
405			`return 1; // everything's cool`
406
407			`// I don't think this should happen. It indicates that`
408			`// programming is still in progress.`
409
410			`return 0;`
411			`}`
412
413			`#endif /* ALTERA */`