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avr.c: Adds avr_tpi_program_enable

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Generic function enabling external programming on TPI devices. This
function sets the required guard time (which is passed in as parameter),
checks the TPI identification register, writes SKEY command + SKEY, and
finally polls the NVMEN bit in TPISR.

avr.h: Add prototype definitions of avr_tpi_program_enable() and
avr_tpi_chip_erase().
avrftdi_tpi.c: Removes tpi_skey_cmd array, containing the SKEY command
and the SKEY bytes.
tpi.h: Adds tpi_skey_cmd array, containing the SKEY command and the SKEY
bytes, but in the reverse order of tpi_skey.

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1167 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Hannes Weisbach
2013-05-06 12:49:26 +00:00
parent 5b7952ade8
commit be385b2b48
5 changed files with 60 additions and 2 deletions
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50
avr.c
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@@ -103,6 +103,56 @@ int avr_tpi_chip_erase(PROGRAMMER * pgm, AVRPART * p)
}
}
/* TPI program enable sequence */
int avr_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p, unsigned char guard_time)
{
int err, retry;
unsigned char cmd[2];
unsigned char response;
if(p->flags & AVRPART_HAS_TPI) {
/* set guard time */
cmd[0] = (TPI_CMD_SSTCS | TPI_REG_TPIPCR);
cmd[1] = guard_time;
err = pgm->cmd_tpi(pgm, cmd, sizeof(cmd), NULL, 0);
if(err)
return err;
/* read TPI ident reg */
cmd[0] = (TPI_CMD_SLDCS | TPI_REG_TPIIR);
err = pgm->cmd_tpi(pgm, cmd, 1, &response, sizeof(response));
if (err || response != TPI_IDENT_CODE) {
fprintf(stderr, "TPIIR not correct\n");
return -1;
}
/* send SKEY command + SKEY */
err = pgm->cmd_tpi(pgm, tpi_skey_cmd, sizeof(tpi_skey_cmd), NULL, 0);
if(err)
return err;
/* check if device is ready */
for(retry = 0; retry < 10; retry++)
{
cmd[0] = (TPI_CMD_SLDCS | TPI_REG_TPISR);
err = pgm->cmd_tpi(pgm, cmd, 1, &response, sizeof(response));
if(err || !(response & TPI_REG_TPISR_NVMEN))
continue;
return 0;
}
fprintf(stderr, "Error enabling TPI external programming mode:");
fprintf(stderr, "Target does not reply\n");
return -1;
} else {
fprintf(stderr, "%s called for a part that has no TPI\n", __func__);
return -1;
}
}
/* TPI: setup NVMCMD register and pointer register (PR) for read/write/erase */
static int avr_tpi_setup_rw(PROGRAMMER * pgm, AVRMEM * mem,
unsigned long addr, unsigned char nvmcmd)