589 lines
14 KiB
C
589 lines
14 KiB
C
/*
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* Copyright 2001 Brian S. Dean <bsd@bsdhome.com>
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY BRIAN S. DEAN ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BRIAN S. DEAN BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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/* $Id$ */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "avr.h"
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#include "pindefs.h"
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#include "ppi.h"
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extern char * progname;
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extern char progbuf[];
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char * avr_version = "$Id$";
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/* Need to add information for 2323, 2343, and 4414 */
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struct avrpart parts[] = {
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{ "AT90S1200", "1200", { 64, 1024 }, 0xff, { 0x00, 0xff },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S2313", "2313", { 128, 2048 }, 0x7f, { 0x80, 0x7f },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S2333", "2333", { 128, 2048 }, 0xff, { 0x00, 0xff },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S4433", "4433", { 256, 4096 }, 0xff, { 0x00, 0xff },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S4434", "4434", { 256, 4096 }, 0xff, { 0x00, 0xff },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S8515", "8515", { 512, 8192 }, 0x7f, { 0x80, 0x7f },
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9000, 20000, 20000, { NULL, NULL } },
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{ "AT90S8535", "8535", { 512, 8192 }, 0xff, { 0x00, 0xff },
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9000, 20000, 20000, { NULL, NULL } },
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};
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#define N_AVRPARTS (sizeof(parts)/sizeof(struct avrpart))
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int avr_list_parts ( FILE * f, char * prefix )
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{
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int i;
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for (i=0; i<N_AVRPARTS; i++) {
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fprintf(f, "%s%s = %s\n",
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prefix, parts[i].optiontag, parts[i].partdesc);
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}
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return i;
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}
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struct avrpart * avr_find_part ( char * p )
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{
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int i;
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for (i=0; i<N_AVRPARTS; i++) {
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if (strcmp(parts[i].optiontag, p)==0) {
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return &parts[i];
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}
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}
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return NULL;
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}
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/*
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* transmit and receive a bit of data to/from the AVR device
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*/
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int avr_txrx_bit ( int fd, int bit )
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{
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int r;
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/*
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* read the result bit (it is either valid from a previous clock
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* pulse or it is ignored in the current context)
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*/
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r = ppi_getpin(fd, pinno[PIN_AVR_MISO]);
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/* set the data input line as desired */
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ppi_setpin(fd, pinno[PIN_AVR_MOSI], bit);
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/*
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* pulse the clock line, clocking in the MOSI data, and clocking out
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* the next result bit
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*/
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ppi_pulsepin(fd, pinno[PIN_AVR_SCK]);
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return r;
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}
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/*
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* transmit and receive a byte of data to/from the AVR device
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*/
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unsigned char avr_txrx ( int fd, unsigned char byte )
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{
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int i;
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unsigned char r, b, rbyte;
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rbyte = 0;
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for (i=0; i<8; i++) {
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b = (byte >> (7-i)) & 0x01;
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r = avr_txrx_bit ( fd, b );
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rbyte = rbyte | (r << (7-i));
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}
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return rbyte;
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}
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/*
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* transmit an AVR device command and return the results; 'cmd' and
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* 'res' must point to at least a 4 byte data buffer
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*/
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int avr_cmd ( int fd, unsigned char cmd[4], unsigned char res[4] )
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{
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int i;
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for (i=0; i<4; i++) {
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res[i] = avr_txrx(fd, cmd[i]);
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}
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return 0;
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}
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/*
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* read a byte of data from the indicated memory region
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*/
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unsigned char avr_read_byte ( int fd, struct avrpart * p,
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AVRMEM memtype, unsigned short addr )
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{
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unsigned short offset;
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unsigned char cmd[4];
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unsigned char res[4];
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/* order here is very important, AVR_EEPROM, AVR_FLASH, AVR_FLASH+1 */
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static unsigned char cmdbyte[3] = { 0xa0, 0x20, 0x28 };
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LED_ON(fd, pinno[PIN_LED_PGM]);
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LED_OFF(fd, pinno[PIN_LED_ERR]);
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offset = 0;
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if (memtype == AVR_FLASH) {
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offset = addr & 0x01;
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addr = addr / 2;
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}
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cmd[0] = cmdbyte[memtype + offset];
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cmd[1] = addr >> 8; /* high order bits of address */
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cmd[2] = addr & 0x0ff; /* low order bits of address */
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cmd[3] = 0; /* don't care */
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avr_cmd(fd, cmd, res);
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LED_OFF(fd, pinno[PIN_LED_PGM]);
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return res[3];
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}
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/*
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* Read the entirety of the specified memory type into the
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* corresponding buffer of the avrpart pointed to by 'p'.
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*
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* Return the number of bytes read, or -1 if an error occurs.
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*/
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int avr_read ( int fd, struct avrpart * p, AVRMEM memtype )
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{
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unsigned char rbyte;
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unsigned short i;
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unsigned char * buf;
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int size;
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buf = p->mem[memtype];
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size = p->memsize[memtype];
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for (i=0; i<size; i++) {
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rbyte = avr_read_byte(fd, p, memtype, i);
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fprintf ( stderr, " \r%4u 0x%02x", i, rbyte );
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buf[i] = rbyte;
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}
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fprintf ( stderr, "\n" );
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return i;
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}
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/*
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* write a byte of data to the indicated memory region
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*/
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int avr_write_byte ( int fd, struct avrpart * p, AVRMEM memtype,
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unsigned short addr, unsigned char data )
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{
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unsigned char cmd[4];
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unsigned char res[4];
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unsigned char r;
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int ready;
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int tries;
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unsigned char b;
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unsigned short offset;
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unsigned short caddr;
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/* order here is very important, AVR_EEPROM, AVR_FLASH, AVR_FLASH+1 */
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static unsigned char cmdbyte[3] = { 0xc0, 0x40, 0x48 };
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/*
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* check to see if the write is necessary by reading the existing
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* value and only write if we are changing the value
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*/
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b = avr_read_byte(fd, p, memtype, addr);
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if (b == data) {
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return 0;
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}
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LED_ON(fd, pinno[PIN_LED_PGM]);
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LED_OFF(fd, pinno[PIN_LED_ERR]);
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offset = 0;
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caddr = addr;
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if (memtype == AVR_FLASH) {
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offset = addr & 0x01;
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caddr = addr / 2;
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}
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cmd[0] = cmdbyte[memtype + offset];
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cmd[1] = caddr >> 8; /* high order bits of address */
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cmd[2] = caddr & 0x0ff; /* low order bits of address */
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cmd[3] = data; /* data */
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avr_cmd(fd, cmd, res);
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tries = 0;
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ready = 0;
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while (!ready) {
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usleep(p->min_write_delay); /* typical flash/eeprom write delay */
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r = avr_read_byte(fd, p, memtype, addr);
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if ((data == p->f_readback) ||
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(data == p->e_readback[0]) || (data == p->e_readback[1])) {
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/*
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* use an extra long delay when we happen to be writing values
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* used for polled data read-back. In this case, polling
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* doesn't work, and we need to delay the worst case write time
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* specified for the chip.
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*/
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usleep(p->max_write_delay);
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ready = 1;
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}
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else if (r == data) {
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ready = 1;
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}
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tries++;
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if (!ready && tries > 10) {
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/*
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* we couldn't write the data, indicate our displeasure by
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* returning an error code
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*/
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LED_OFF(fd, pinno[PIN_LED_PGM]);
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LED_ON(fd, pinno[PIN_LED_ERR]);
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return -1;
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}
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}
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LED_OFF(fd, pinno[PIN_LED_PGM]);
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return 0;
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}
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/*
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* Write the whole memory region (flash or eeprom, specified by
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* 'memtype') from the corresponding buffer of the avrpart pointed to
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* by 'p'. Write up to 'size' bytes from the buffer. Data is only
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* written if the new data value is different from the existing data
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* value. Data beyond 'size' bytes is not affected.
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*
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* Return the number of bytes written, or -1 if an error occurs.
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*/
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int avr_write ( int fd, struct avrpart * p, AVRMEM memtype, int size )
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{
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int rc;
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int wsize;
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unsigned char * buf;
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unsigned short i;
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unsigned char data;
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int werror;
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LED_OFF(fd, pinno[PIN_LED_ERR]);
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werror = 0;
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buf = p->mem[memtype];
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wsize = p->memsize[memtype];
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if (size < wsize) {
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wsize = size;
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}
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else if (size > wsize) {
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fprintf(stderr,
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"%s: WARNING: %d bytes requested, but memory region is only %d bytes\n"
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"%sOnly %d bytes will actually be written\n",
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progname, size, wsize,
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progbuf, wsize);
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}
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for (i=0; i<wsize; i++) {
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/* eeprom or low byte of flash */
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data = buf[i];
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rc = avr_write_byte(fd, p, memtype, i, data );
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fprintf(stderr, " \r%4u 0x%02x", i, data);
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if (rc) {
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fprintf(stderr, " ***failed; ");
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fprintf(stderr, "\n");
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LED_ON(fd, pinno[PIN_LED_ERR]);
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werror = 1;
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}
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if (werror) {
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/*
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* make sure the error led stay on if there was a previous write
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* error, otherwise it gets cleared in avr_write_byte()
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*/
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LED_ON(fd, pinno[PIN_LED_ERR]);
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}
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}
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fprintf ( stderr, "\n" );
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return i;
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}
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/*
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* issue the 'program enable' command to the AVR device
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*/
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int avr_program_enable ( int fd )
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{
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unsigned char cmd[4] = {0xac, 0x53, 0x00, 0x00};
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unsigned char res[4];
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avr_cmd(fd, cmd, res);
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if (res[2] != cmd[1])
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return -1;
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return 0;
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}
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/*
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* issue the 'chip erase' command to the AVR device
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*/
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int avr_chip_erase ( int fd, struct avrpart * p )
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{
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unsigned char data[4] = {0xac, 0x80, 0x00, 0x00};
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unsigned char res[4];
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LED_ON(fd, pinno[PIN_LED_PGM]);
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avr_cmd(fd, data, res);
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usleep(p->chip_erase_delay);
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avr_initialize(fd, p);
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LED_OFF(fd, pinno[PIN_LED_PGM]);
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return 0;
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}
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/*
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* read the AVR device's signature bytes
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*/
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int avr_signature ( int fd, unsigned char sig[4] )
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{
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unsigned char cmd[4] = {0x30, 0x00, 0x00, 0x00};
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unsigned char res[4];
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int i;
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for (i=0; i<4; i++) {
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cmd[2] = i;
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avr_cmd(fd, cmd, res);
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sig[i] = res[3];
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}
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return 0;
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}
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/*
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* apply power to the AVR processor
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*/
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void avr_powerup ( int fd )
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{
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ppi_set(fd, PPIDATA, PPI_AVR_VCC); /* power up */
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usleep(100000);
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}
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/*
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* remove power from the AVR processor
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*/
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void avr_powerdown ( int fd )
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{
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ppi_clr(fd, PPIDATA, PPI_AVR_VCC); /* power down */
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}
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/*
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* initialize the AVR device and prepare it to accept commands
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*/
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int avr_initialize ( int fd, struct avrpart * p )
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{
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int rc;
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int tries;
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avr_powerup(fd);
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ppi_setpin(fd, pinno[PIN_AVR_SCK], 0);
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ppi_setpin(fd, pinno[PIN_AVR_RESET], 0);
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ppi_pulsepin(fd, pinno[PIN_AVR_RESET]);
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usleep(20000); /* 20 ms XXX should be a per-chip parameter */
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/*
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* Enable programming mode. If we are programming an AT90S1200, we
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* can only issue the command and hope it worked. If we are using
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* one of the other chips, the chip will echo 0x53 when issuing the
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* third byte of the command. In this case, try up to 32 times in
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* order to possibly get back into sync with the chip if we are out
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* of sync.
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*/
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if (strcmp(p->partdesc, "AT90S1200")==0) {
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avr_program_enable ( fd );
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}
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else {
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tries = 0;
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do {
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rc = avr_program_enable ( fd );
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if (rc == 0)
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break;
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ppi_pulsepin(fd, pinno[PIN_AVR_SCK]);
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tries++;
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} while (tries < 32);
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/*
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* can't sync with the device, maybe it's not attached?
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*/
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if (tries == 32) {
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fprintf ( stderr, "%s: AVR device not responding\n", progname );
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return -1;
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}
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}
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return 0;
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}
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char * avr_memtstr ( AVRMEM memtype )
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{
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switch (memtype) {
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case AVR_EEPROM : return "eeprom"; break;
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case AVR_FLASH : return "flash"; break;
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default : return "unknown-memtype"; break;
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}
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}
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int avr_initmem ( struct avrpart * p )
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{
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int i;
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for (i=0; i<AVR_MAXMEMTYPES; i++) {
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p->mem[i] = (unsigned char *) malloc(p->memsize[i]);
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if (p->mem[i] == NULL) {
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fprintf(stderr, "%s: can't alloc buffer for %s size of %d bytes\n",
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progname, avr_memtstr(i), p->memsize[i]);
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return -1;
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}
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}
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return 0;
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}
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/*
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* Verify the memory buffer of p with that of v. The byte range of v,
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* may be a subset of p. The byte range of p should cover the whole
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* chip's memory size.
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*
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* Return the number of bytes verified, or -1 if they don't match.
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*/
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int avr_verify(struct avrpart * p, struct avrpart * v, AVRMEM memtype, int size)
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{
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int i;
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unsigned char * buf1, * buf2;
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int vsize;
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buf1 = p->mem[memtype];
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buf2 = v->mem[memtype];
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vsize = p->memsize[memtype];
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if (vsize < size) {
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fprintf(stderr,
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"%s: WARNING: requested verification for %d bytes\n"
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"%s%s memory region only contains %d bytes\n"
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"%sOnly %d bytes will be verified.\n",
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progname, size,
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progbuf, avr_memtstr(memtype), vsize,
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progbuf, vsize);
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size = vsize;
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}
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for (i=0; i<size; i++) {
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if (buf1[i] != buf2[i]) {
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fprintf(stderr,
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"%s: verification error, first mismatch at byte %d\n"
|
|
"%s0x%02x != 0x%02x\n",
|
|
progname, i,
|
|
progbuf, buf1[i], buf2[i]);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
|
|
void avr_display ( FILE * f, struct avrpart * p, char * prefix )
|
|
{
|
|
fprintf(f,
|
|
"%sAVR Part = %s\n"
|
|
"%sFlash memory size = %d bytes\n"
|
|
"%sEEPROM memory size = %d bytes\n"
|
|
"%sMin/Max program delay = %d/%d us\n"
|
|
"%sChip Erase delay = %d us\n"
|
|
"%sFlash Polled Readback = 0x%02x\n"
|
|
"%sEEPROM Polled Readback = 0x%02x, 0x%02x\n",
|
|
prefix, p->partdesc,
|
|
prefix, p->memsize[AVR_FLASH],
|
|
prefix, p->memsize[AVR_EEPROM],
|
|
prefix, p->min_write_delay, p->max_write_delay,
|
|
prefix, p->chip_erase_delay,
|
|
prefix, p->f_readback,
|
|
prefix, p->e_readback[0], p->e_readback[1]);
|
|
}
|
|
|