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/* AVR XMEGA programming algorithms
Copyright (C) 2011 Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de
With Infos from AVR1612 and vsprog/src/target/avrxmega
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "pdioverjtag.h"
PDIoverJTAG::PDIoverJTAG(Jtag *j, uint8_t pdicom)
{
char *fname = getenv("PDI_DEBUG");
if (fname)
pdi_dbg = fopen(fname,"wb");
else
pdi_dbg = NULL;
jtag=j;
pdicmd = pdicom;
}
PDIoverJTAG::~PDIoverJTAG(void)
{
if(pdi_dbg)
fclose(pdi_dbg);
}
enum PDI_STATUS_CODE PDIoverJTAG::pdi_write(const uint8_t *data,
uint16_t length)
{
int i;
if (pdi_dbg)
{
fprintf(pdi_dbg, "pdi_write len %d:", length);
for (i = 0; i < length; i++ )
fprintf(pdi_dbg, " %02x", data[i]);
fprintf(pdi_dbg, "\n");
}
jtag->shiftIR(&pdicmd);
for (i = 0; i < length; i++)
{
uint8_t parity_data = get_parity(data[i]);
uint8_t sd[2];
sd[0]= data[i];
sd[1] = parity_data;
jtag->shiftDR(sd, NULL, 9);
}
return STATUS_OK;
}
uint32_t PDIoverJTAG::pdi_read(uint8_t *data, uint32_t length, int retries)
{
uint32_t i;
int j = 0;
jtag->shiftIR(&pdicmd);
for (i = 0 ; i <length; i++)
{
uint8_t rev[3];
jtag->shiftDR(0, rev, 9);
rev[2] = get_parity( rev[0]);
while((rev[2] != rev[1]) && (rev[0] == 0xeb) && (j <retries))
{
jtag->shiftDR(0, rev, 9);
rev[2] = get_parity( rev[0]);
j++;
if (pdi_dbg)
fprintf(pdi_dbg, " %02x", rev[0]);
}
if (j>0 && pdi_dbg)
fprintf(pdi_dbg, "\n");
if (j == retries)
{
if (pdi_dbg)
fprintf(pdi_dbg," Read time out\n");
return 0;
}
if ( rev[2] != rev[1])
{
if (pdi_dbg)
{
uint32_t j;
fprintf(pdi_dbg, "\npdi_read parity error at pos %d/%d :",
i, length);
fprintf(pdi_dbg, " %02x %02x\n", rev[1], rev[0]);
for (j = 0; j < i; j++ )
fprintf(pdi_dbg, " %02x", data[j]);
fprintf(pdi_dbg, "\n");
}
return 0;
}
data[i] = rev[0];
}
if (pdi_dbg)
{
fprintf(pdi_dbg, "pdi_read:\n");
for (i = 0; i < length; i++ )
{
if ((i & 0xf) == 0)
fprintf(pdi_dbg, "%04x",i);
fprintf(pdi_dbg, "%02x", data[i]);
if ((i & 0xf) == 0xf)
fprintf(pdi_dbg, "\n");
}
fprintf(pdi_dbg, "\n");
}
return length;
}
uint8_t PDIoverJTAG::get_parity(uint8_t data)
{
int i;
uint8_t p = 0;
for (i = 0; i < 8; i++)
if (data & (1 << i))
p ^= 1;
return p;
}
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